init version.

[bush.git] / CWRU / changelog

                                 9/15/2016
                                 ---------
[bush-4.4 released]

                                   9/17
                                   ----
builtins/common.c
        - display_signal_list: if 0 is supplied as an argument to kill -l,
          display a signal-out-of-range error.  Fixes bug reported by
          Martijn Dekker <martijn@inlv.org>

                                   9/18
                                   ----
print_cmd.c
        - print_heredoc_bodies: take a list of redirections, all here documents,
          and print the here-document bodies including the ending delimiter,
          followed by a newline
        - print_redirection_list: print the heredoc headers the first time
          through the list of redirections so we print them in the same left-
          to-right order they're supplied; print the bodies and delimiters with
          print_heredoc_bodies after we print all the redirections if we're
          not printing a list of commands (printing_connection == 0).  Fix for
          problem reported by Isabella Parakiss <izaberina@gmail.com>
        - print_deferred_heredocs: don't print heredoc headers, since they're
          now printed in print_redirection_list
        - print_deferred_heredocs: use print_heredoc_bodies

                                   9/20
                                   ----
builtins/mapfile.def
        - readarray: update usage synopsis to include -d delim.  Report and
          fix from jhankins@homewood.k12.al.us

test.c
        - test_binop: if op[0] == '-', make sure op[1] != 0 before checking
          op[2] or op[3].  Fixes out-of-bounds read reported by Franco
          Costantini <franco.costantini.20@gmail.com>

parse.y
        - cond_term: if yylval.word->word[0] == '-' make sure word[1] != 0
          before checking word[2] and calling test_unop.  Fixes out-of-bounds
          read reported by Franco Costantini <franco.costantini.20@gmail.com>
        - make sure to check all instances of the return value of the
          simple_command production before trying to hook redirections onto it,
          since it can potentially return NULL.
          Reported by Franco Costantini <franco.costantini.20@gmail.com>

                                   9/21
                                   ----
parse.y
        - token_is_assignment: make sure to check that the return value from
          assignment() finds the `=' we just added at index I to avoid false
          positives from g=g=g=g=g=g=().  Reported by Franco Costantini
          <franco.costantini.20@gmail.com>

                                   9/22
                                   ----
parse.y
        - token_is_assignment: if we're not using the bush malloc (which has
          guard bytes after the requested allocation size), use a new
          buffer so we can make sure it's big enough to hold the current
          token and at least two additional characters.  Reported by
          Franco Costantini <franco.costantini.20@gmail.com>

                                   9/23
                                   ----
execute_cmd.c
        - execute_in_subshell: call without_job_control for both job control
          and non-job-control builds to avoid waiting for last_made_pid
          inherited from parent shell.  Related to fix from 8/4 to
          initialize_subshell.  Fixes bug reported by Martijn Dekker
          <martijn@inlv.org>

builtins/declare.def
        - local_builtin: allow `local --help' to work even when not executing
          a function. Suggestion from Norm Abramovitz <norm@starkandwayne.com>

                                   9/25
                                   ----
builtins/printf.def
        - bexpand: if passed a null or empty string, return a newly-allocated
          empty string (so the return value can always be freed) instead of
          NULL.
        - printstr: if passed a null string, treat it as if it were an empty
          string so any precision or fieldwidth arguments are handled
          correctly.  Report from isabella parakiss <izaberina@gmail.com>

subst.c
        - skip_matched_pair: make the flags argument of 1 affect whether or
          not backslash can quote characters in the string, so it affects
          all quoting mechanisms

arrayfunc.c
        - unbind_array_element: now takes a third (flags) argument; flags&1
          means to not expand an associative array index. This is only called
          from a shell builtin context, which means the argument should have
          already undergone word expansion, so it should be ok.  Will still
          be a problem for uses like "unset -v 'var[$ind]'", quoted to avoid
          globbing
        - valid_array_reference: pass second flags argument to skipsubscript;
          still set to 0 by all callers

arrayfunc.h
        - unbind_array_element: updated prototype

builtins/set.def
        - unset_builtin: add third argument of 1 to unbind_array_element calls
          [TEMPORARILY DISABLED]
        - unset_builtin: call valid_array_reference with second arg of 1 to
          handle unmatched pairs of quotes and [/]

array.c
        - array_reference: optimize access locality as well as sequential
          access by adding ability to start from last-accessed element and move
          backwards or forwards depending on the desired index.  Inspired by
          report from Tom McCurdy <tom.j.mccurdy@gmail.com> and followup from
          Christian Franke <Christian.Franke@t-online.de>

variables.c
        - all_array_variables: include associative arrays, not just indexed
          arrays.  Reported by Grisha Levit <grishalevit@gmail.com>

execute_cmd.c
        - execute_disk_command: if we're optimizing out the fork (CMD_NO_FORK),
          decrement the shell level so we don't end up incrementing it twice.
          We should decrement the shell level for an implicit exec like an
          explicit one.  Reported by Stephane Chazelas
          <stephane.chazelas@gmail.com>

builtins/exec.def
        - exec_builtin: don't bother to decrement the shell level if we are
          already in a `(command)' subshell.  Reported by Stephane Chazelas
          <stephane.chazelas@gmail.com>

lib/readline/macro.c
        - macro_level: count of macro nesting level, maintained by
          _rl_push_executing_macro and _rl_pop_executing macro
        - _rl_with_macro_input: if current nesting level exceeds
          MAX_MACRO_LEVEL, abort the current command line with _rl_abort_internal
          and return to the top level.  Reported by Christian Klomp
          <christianklomp@gmail.com>

lib/readine/history.c
        - add_history: if allocating the history list for the first time,
          make sure the max history list size isn't so large that it will
          cause allocation errors.  Cap it at MAX_HISTORY_INITIAL_SIZE
          (8192).  Reported by Sean Zha <freeman_cha@hotmail.com>

jobs.c
        - wait_for: if a foreground job with job control enabled is killed by a
          SIGINT and sourcelevel != 0, act as if we received the SIGINT so the
          file sourcing can be terminated.  Reported by PePa
          <peterkelly@passchier.net>

                                   9/26
                                   ----
subst.c
        - read_comsub: only warn once for null bytes in command substitution
          output, instead of once for every null byte

arrayfunc.c
        - array_variable_part: now takes a `flags' argument; changed all callers
          to initially pass 0
        - array_variable_name: now takes a `flags' argument; changed all callers
          to initially pass 0
        - array_variable_name: pass `flags' argument to skipsubscript instead
          of just passing 0

arrayfunc.h
        - array_variable_{name,part}: added new argument to prototypes

                                   9/29
                                   ----
bushline.c
        - bush_directory_completion_hook: don't bother to try and expand a
          ${ or $( that isn't complete; expand_prompt_string will complain.
          Fixes reports from John Passaro <john.a.passaro@gmail.com> and
          Valentin Bajrami <valentin.bajrami@gmail.com>

lib/readline/history.c
        - _hs_append_history_line: use a strategy that attempts to avoid
          realloc copying memory to a newly-allocated block if the history
          line we're appending to gets `too long' (currently 256 bytes).
          We reallocate in powers of 2 starting at 512, and rely on realloc
          not allocating a new block and copying into it if the size is the
          same as the last call to realloc.  Addresses issue raised by
          Hubert Schmid <h.schmid@gmx.de>

trap.h
        - check_signals: new extern declaration
        - trapped_signal_received: new extern declaration

builtins/read.def
        - read_builtin: if one of the zread* functions returns < 0 (which
          usually only happens in Posix mode), make sure we call check_signals()
          before eventually calling run_pending_traps() because zread() isn't
          going to call it
        - include trap.h for correct extern functions and variable declarations

lib/sh/zread.c
        - zread: if executing a builtin, call check_signals_and_traps() for
          backwards compatibility.  If not, call check_signals() only, because
          we don't want to run traps during, for instance, reading command
          substitution output.  Fixes race condition bug reported by Luiz Angelo
          Daros de Luca <luizluca@gmail.com>

                                   9/30
                                   ----
subst.c
        - command_substitute: reset parse_and_execute_level to 0 in the child
          process, since it's independent of the other parse_and_execute
          calls.  Adds command substitution inside other parse_and_execute
          calls optimizations to suppress forks, as suggested by
          Martijn Dekker <martijn@inlv.org>

                                   10/3
                                   ----
configure.ac
        - SHOBJ_STATUS: make sure it defaults to unsupported and is substituted
          if the shobj-conf script isn't run.  Fixes `make install' bug with
          a minimal config reported by Andrew Tomazos <andrewtomazos@gmail.com>

                                   10/5
                                   ----
support/shobj-conf
        - darwin: set compatibility_version for a shared build of the readline
          library (the standalone readline distribution shares this file) to
          $(SHLIB_MAJOR)$(SHLIB_MINOR).  Recommendation from Max Horn
          <max@quendi.de>

                                   10/6
                                   ----
array.h
        - array_first_index: new convenience define

array.c
        - ADD_AFTER: new define, complement of ADD_BEFORE
        - UNSET_LASTREF: now takes an array as an argument, prepping for move
          of lastref pointer into the array struct
        - array_insert: check whether we are adding at the beginning of the
          array and take a fast path if so
        - array_insert: use same strategy as array_reference to find the place
          to insert, starting from the last-referenced element and moving
          forward or back from there; use ADD_AFTER if moving backward
        - array_insert: if replacing an existing element, just replace the
          value with new->value instead of the entire element
        - array_reference: short-circuit quickly if looking for an element
          before the first assigned index
        - array_reference: if we don't find the element, leave lastref pointing
          to the closest element under the assumption we will be assigning or
          looking for something close
        - array_reference: take advantage of ordered indexes to short-circuit
          when looking for element that is not set

                                   10/7
                                   ----
array.c
        - array_remove: short-circuit if asked to remove index after max
          index or before first index

                                   10/10
                                   -----
lib/malloc/malloc.c
        - internal_realloc: if we are requesting reallocation to the same size
          as the block's current size, short-circuit and return `mem' right
          after doing bounds check
        - internal_realloc: if we are reducing the size of an allocation, and
          the new size fits in the next lower bin, just keep the same block
          and adjust the size, so we can avoid some copies

parse.y
        - set_line_mbstate: keep track of the allocated size of
          shell_input_line_property, only request reallocation if the size
          increases, but don't let it get too big

                                   10/11
                                   -----
jobs.c
        - wait_for_background_pids: make sure we wait for pid in
          last_procsub_child since it's not found in any job -- still needs
          more work to wait for multiple process substitutions

subst.c
        - process_substitute: if make_child fails, make sure we call
          restore_pipeline to undo the previous save_pipeline()

                                   10/15
                                   -----
subst.c
        - process_substitute,command_substitute: leave subshell_level (reflected
          as $BUSH_SUBSHELL) intact for any exit trap instead of decrementing
          it.  Suggested by Martijn Dekker <martijn@inlv.org>

builtins/evalstring.c
        - optimize_subshell_command: new function, framework for optimizing
          out forks for command that have already forked and are executing
          in a subshell. Not used yet

expr.c
        - readtok: if we have a post-increment or post-decrement, and the
          previous token is not a string, check whether the previous token is
          a number that results from a pre-increment or pre-decrement, and
          make that an error.  Report from Conrad Hoffmann <ch@bitfehler.net>

                                   10/16
                                   -----
aclocal.m4
        - BUSH_JOB_CONTROL_MISSING: convert from AC_TRY_RUN to AC_TRY_COMPILE
          with existing set of preprocessor defines, so it can work when
          cross-compiling.  Suggested by Felix Janda <felix.janda@posteo.de>

                                   10/19
                                   -----
variables.c
        - get_bushpid: BUSHPID is no longer readonly; assignments to it are
          just ignored.

doc/{bush.1,bushref.texi}
        - BUSHPID: note that assignments are ignored and unsetting BUSHPID
          causes it to lose its special properties

                                   10/28
                                   -----
builtins/pushd.def
        - popd_builtin: make sure to check the normalized stack offset
          (i.e., negatives counting back from the end of the stack) is within
          bounds before trying to free that stack entry.  Report from
          Fernando Muñoz <fernando@null-life.com>

lib/readline/histfile.c
        - chown: protect calls with HAVE_CHOWN.  Fixes for MinGW{64,32} from
          J. Peter Mugaas <jpmugaas@suddenlink.net>

lib/readline/colors.c
        - S_ISDIR: add define if missing
        - S_ISUID, S_ISGID, S_ISLNK, S_ISSOCK: don't use unless defined.
          Fixes for MinGW{64,32} from J. Peter Mugaas <jpmugaas@suddenlink.net>

bushhist.c
        - current_command_line_comment: set to the most recent line in a
          possibly multi-line command that contains a shell comment; set in
          maybe_add_history and bush_add_history to either the current
          command number or -2
        - maybe_add_history: set current_command_line_comment for first line
          of command
        - bush_add_history: chars_to_add set to "\n" if the current command line
          is one greater than the previous line containing a comment
          (current_command_line_comment).  Fixes complaint from back in
          January, 2016 from Dave Rutherford <dave@evilpettingzoo.com>

array.h
        - lastref: move last-referenced pointer into each array struct, so all
          arrays can have reference locality

array.c
        - array_create: set lastref element to 0
        - array_copy: if copying the lastref in array a, set the new lastref
          in the copy to the same element
        - IS_LASTREF, LASTREF_START, LASTREF, INVALIDATE_LASTREF, SET_LASTREF,
          UNSET_LASTREF: change to use new array `lastref' member

pathexp.c
        - quote_string_for_globbing: if quoting for a regexp, make sure to
          skip and copy a leading `^' in a bracket expression, and skip and
          copy a subsequent `]' (after an optional `^'), so that leading
          bracket doesn't close the bracket expression.  Report from
          Stephane Chazelas <stephane.chazelas@gmail.com>

                                   10/29
                                   -----
subst.c
        - extract_delimited_string: add calls to CHECK_STRING_OVERRUN for
          $( inside $((, nested OPENERs, nested ALT_OPENERs, and backquotes
        - skip_to_delim: add calls to CHECK_STRING_OVERRUN for $(, ${,
          process substitution
        - extract_dollar_brace_string: add calls to CHECK_STRING_OVERRUN for
          $(
        - extract_dollar_brace_string: use skipsubscript to skip over the
          array subscript in ${var[sub]} (non-quoted case uses string_extract,
          which already uses skipsubscript).  Tagged for bush-5.0

                                   10/30
                                   -----
variables.c
        - EPOCHSECONDS: new dynamic variable, time in seconds since Unix
          epoch; assignments are ignored.  Can be used on systems where
          strftime() doesn't support '%s'
        - EPOCHREALTIME: new dynamic variable, time in seconds since Unix
          epoch with microsecond granularity

doc/{bush.1,bushref.texi}
        - EPOCHSECONDS documentation
        - EPOCHREALTIME documentation

execute_cmd.c
        - decpoint: moved to locale.c, renamed locale_decpoint; changed callers

{bushintl,externs}.h
        - locale_decpoint: extern declaration or #define if support for
          localeconv() not there

                                   10/31
                                   -----
lib/malloc/malloc.c
        - posix_memalign: add new posix-mandated interface

examples/loadables/rm.c
        - rm: minimal loadable builtin, removes files and directories, only
          handles -r and -f options.  Original from Tim Ruehsen
          <tim.ruehsen@gmx.de>, heavily rewritten for inclusion as loadable

examples/loadables/Makefile.in
        - rm: add rules to build rm as one of the `other' targets

examples/loadables/stat.c
        - stat: new loadable builtin that takes a filename and loads the info
          returned by stat(2) into an associative array specified by the -A
          argument (default STAT)

                                   11/1
                                   ----
variables.c
        - BUSH_ARGV0: new dynamic variable, returns $0 on reference and sets
          $0 on assignment.  From a suggestion from  Rocky Bernstein <rocky@gnu.org>
          a few years ago

doc/{bush.1,bushref.texi}
        - BUSH_ARGV0: document

                                   11/2
                                   ----
lib/glob/sm_loop.c
        - parse_collsym: make sure to not return an out-of-bounds read if a
          collating symbol is unterminated.  Fixes OOB read reported by
          Jerzy Kramarz <op7ica@gmail.com>
        - brackmatch: after incrementing p, before checking whether it's a
          character range, check whether *p was NULL before the increment
          and short-circuit the bracket expression if it is

jobs.c
        - discard_last_procsub_child: new function, safely discards
          last_procsub_child and sets it to NULL

subst.c
        - process_substitute: call discard_last_procsub_child instead of
          calling discard_pipeline directly.  Fixes bug reported by
          Christian Weisgerber <naddy@mips.inka.de>

                                   11/3
                                   ----
shell.h
        - EX_DISKFALLBACK: new special return status available to builtins;
          means to attempt to execute a disk command with the same name as
          the builtin

examples/loadables/rm.c
        - if we see the -i option, return EX_DISKFALLBACK

execute_cmd.c
        - execute_simple_command: if executing a builtin returns EX_DISKFALLBACK,
          try running execute_disk_command instead 

bushline.c
        - shell_expand_line: use expand_word to expand the readline line
          buffer, which allows us to pass flags with the word. If a numeric
          argument is supplied, do not perform quote removal (pass
          Q_HERE_DOCUMENT since here-doc quoting does the right thing) and
          do not perform command or process subsitution.  From a suggestion
          by Dabrien 'Dabe' Murphy <dabe@dabe.com> based on an old bug-bush
          discussion

subst.c
        - expand_word_internal: note that we have added a quoted IFS char to
          istring by setting sentinel has_quoted_ifs.  Usually we only add
          one if we are not going to be performing word splitting, but we
          will not perform word splitting if there's no expansion, so we need
          to take care of that case
        - expand_word_internal: when performing final word split, if there are
          no expansions but has_quoted_ifs is non-zero, call remove_quoted_ifs()
          to remove any quoted ifs characters we added while processing
        - remove_quoted_ifs: new function, removes CTLESC chars preceding
          (single-byte) chars in IFS. Used when we are not performing word
          splitting.  Fixes bug reported by Martijn Dekker <martijn@inlv.org>

                                   11/4
                                   ----
lib/readline/macro.c
        - _rl_peek_macro_key: return the next character from the current
          keyboard macro; the next character from the `next' keyboard macro,
          if there is one, if at the end of the current macro; or 0 to
          indicate that we are at the end of a keyboard macro sequence

lib/readline/rlprivate.h
        - _rl_peek_macro_key: extern declaration

lib/readline/readline.c
        - _rl_dispatch_subseq: add test for ESC at the end of a keyboard macro,
          which should cause the keyboard timeout for ESC to kick in.  The
          previous test didn't run the timeout code if executing from a macro,
          even if we had read the last character of the macro.  Fixes bug
          reported by Clark Wang <clarkw@vmware.com>

lib/glob/sm_loop.c
        - GMATCH: allow trailing backslash in pattern to explicitly match a
          backslash that is the last character in the string.  Bug report from
          Stephane Chazelas <stephane.chazelas@gmail.com>

                                   11/5
                                   ----
builtins/common.c
        - display_signal_list: if displaying a signal name corresponding to an
          exit status > 128, don't display the SIG prefix at all.  Old code
          made displaying the SIG prefix dependent on JOB_CONTROL define.
          Report and fix from Martijn Dekker <martijn@inlv.org>

execute_cmd.c
        - execute_subshell_builtin_or_function: call without_job_control even
          if JOB_CONTROL is not defined. Similar to fix from 9/23.
          Report from Martijn Dekker <martijn@inlv.org>

execute_cmd.c
        - execute_simple_command: free memory allocated and passed to
          make_child in the child process if JOB_CONTROL is defined
        - execute_command_internal: free memory allocated and passed to
          make_child in the child process created to run a () subshell or a
          compound command within a pipeline if JOB_CONTROL is defined
        - execute_coproc: free memory allocated and passed to make_child in
          the child process if JOB_CONTROL is defined
        - execute_disk_command: free memory allocated and passed to
          make_child in the child process if JOB_CONTROL is defined.  This
          series of fixes is the result of reports from
          Eduardo A. Bustamante López <dualbus@gmail.com>

                                   11/6
                                   ----
lib/sh/unicode.c
        - u32toutf16: fix to prevent outputting broken surrogate pairs for
          Japanese locales (ja_JP.UTF-8) on cygwin (which uses UTF-16 natively).
          Report and fix from Koichi MURASE <myoga.murase@gmail.com>

builtins/trap.def
        - trap_builtin: if OP is `-' (revert), set the SIGINT signal handler
          to sigint_sighandler if the shell is interactive and sourcing a
          file (interactive_shell && sourcelevel) or running a trap
          (interactive_shell && running_trap) even if it's not currently
          interactive.  Report from Martijn Dekker <martijn@inlv.org>

builtins/read.def
        - check for and read multibyte characters in all cases, not just when
          we are reading a specific number of characters, as long as
          mb_cur_max > 1

subst.c
        - expand_word_internal: some improvements to code that converts istring
          into a WORD_LIST * to avoid multiple allocations and copies of
          istring, which is already malloc'ed memory -- reduce number of malloc
          and free calls

test.c
        - unary_test: make sure if we test -v array[@] or array[*] that we
          free the return value from array_value

                                   11/8
                                   ----
expr.c
        - expcond: make sure to set `noeval' before reading tokens depending on
          the result of the conditional test, since readtok() can evaluate
          identifiers (and recursively those containing expressions).  Report
          and fix from Koichi MURASE <myoga.murase@gmail.com>

builtins/evalstring.c
        - should_suppress_fork: make sure to check for traps on EXIT and
          ERR, since any_signals_trapped() only checks for `real' signals,
          not the fake shell ones.  Fixes bug reported by Werner Fink
          <werner@suse.de>
        - optimize_subshell_command: ditto

                                   11/9
                                   ----
eval.c
        - reader_loop: change so that we don't reset the SIGINT handler every
          time through the command loop in an interactive shell if the signal
          is trapped (as the comment noted).  Reported by Report from Martijn
          Dekker <martijn@inlv.org>

subst.c
        - parameter_brace_{patsub,remove_pattern,transform,casemod}: save and
          restore this_command_name while temporarily setting it for use in
          error messages.  Fixes use-after-free error reported by
          Jerzy Kramarz <op7ica@gmail.com>
        - string_extract_verbatim: make sure when we increment i by 2 due to
          a CTLESC or CTLESC-CTLNUL that we don't read past the end of the
          string. This can happen if the string ends with an odd number of
          CTLESC chars. Fixes oob-read error reported by
          Jerzy Kramarz <op7ica@gmail.com>

                                   11/11
                                   -----
configure.ac,aclocal.m4
        - BUSH_FUNC_SBRK: make sure sbrk actually works, instead of being just
          a stub function like on several Linux distributions

lib/malloc/malloc.c
        - malloc_usable_size: return the maximum number of bytes available for
          a particular memory allocation (size of block allocated for it)

                                   11/12
                                   -----
configure.ac
        - changes to make --enable-profiling work on Linux (-pg, no static link,
          no -static in LDFLAGS)

Makefile.in
        - changes to make --enable-profiling work on Linux (take
          ${PROFILE_FLAGS} out of  BASE_CCFLAGS, add to CCFLAGS instead; add
          BASE_LDFLAGS define that doesn't include -pg or -static; use
          BASE_LDFLAGS in LDFLAGS; move ${PROFILE_FLAGS} and ${STATIC_LD} to
          LDFLAGS)

tests/run-gprof
        - changes to make profiling test suite with gprof work on Linux (set
          GMON_OUT_PREFIX to handle multiple profiled processes per test;
          change default filename to gmon.out from bush.gmon; look for
          gprof output files in ${TMPDIR} instead of /tmp; handle multiple
          profiling files starting with $GMON_OUT_PREFIX)

locale.c
        - locale_isutf8: use locale_charset() if it's available and nl_langinfo
          isn't
        - locale_isutf8: add code to parse a locale specification and determine
          whether the encoding is UTF-8 (or utf8) in the absence of
          nl_langinfo and locale_charset
        - set_default_locale: make sure to set locale_utf8locale early on
        - locale_utf8locale: set via call to locale_isutf8 wherever LANG,
          LC_ALL, or LC_CTYPE is set

                                   11/13
                                   -----
lib/readline/display.c
        - rl_redisplay: handle report of potential integer overflow in
          horizontal display mode from Mateusz Lenik <mlen@mlen.pl>

lib/sh/mbschr.c
        - mbschr: if in a UTF-8 locale (locale_utf8locale) and we are looking
          for an ASCII character, use (essentially) strchr as a shortcut

lib/sh/shmbchar.c
        - utf8_{mbstrlen,mblen,mbsmbchar,mbsnlen}: UTF-8-specific replacement
          functions (should also be able to use utf8_mblen in subst.c:
          string_extract_verbatim)
        - mbsmbchar: if locale_utf8locale is true, call utf8_mbsmbchar
        - mbsmbchar: in UTF-8 locale, use utf8_mblen instead of mbrlen (not
          used if earlier shortcut taken)

lib/sh/unicode.c
        - u32cconv: don't use nl_langinfo early to call u32toutf8()
        - u32cconv: use locale_utf8locale to set utf8locale
        - u32cconv: when initializing (u32init == 0), use locale_charset, then
          nl_langinfo, then stub_charset to determine the charset
        - u32cconv: even if we don't have iconv, if locale_utf8locale is non-
          zero, return u32toutf8

                                   11/15
                                   -----
lib/readline/nls.c
        - _rl_init_locale: new function, split off code that determines current
          locale from _rl_init_eightbit, use it to set _rl_utf8locale

lib/readiline/rlprivate.h
        - _rl_init_locale: new extern declaration

lib/readline/readline.c
        - rl_initialize: if not initializing everything the first time, call
          _rl_init_locale to check current locale and set _rl_utf8locale

lib/readline/text.c
        - _rl_insert_char: optimize cases where we are inserting a single-byte
          character in a locale with multibyte characters
        - _rl_insert_char: check whether character is single byte if we know
          we are in a UTF-8 locale, optimize single-byte case to avoid calls
          to mbrtowc and memmove/memcpy

lib/readline/mbutil.c
        - _rl_char_value: if we are in a UTF-8 locale (_rl_utf8locale) and the
          current character does not have the eighth bit set ((c & 0x80) == 0),
          return that char without bothering to call mbrtowc
        - _rl_adjust_point: don't bother calling mbrlen if we are in a UTF-8
          locale and the current character is not a multibyte character
        - _rl_find_next_mbchar_internal: if we are in a UTF-8 locale, use that
          to avoid calls to mbrtowc

lib/readline/display.c
        - _rl_col_width: if in a UTF-8 locale, take advantage of that to avoid
          calls to mbrlen and mbrtowc
        - rl_redisplay: if in a UTF-8 locale, take advantage of that to avoid
          calls to mbrtowc

                                   11/17
                                   -----
lib/readline/histlib.h
        - PATTERN_SEARCH: new flag for history search interfaces, means to
          search for a pattern as Posix specifies

lib/readline/histsearch.c
        - history_search_internal: now takes a `flags' argument instead of just
          an `anchored' argument to accommodate PATTERN_SEARCH
        - _hs_history_patsearch: new internal interface to use when flags
          specify PATTERN_SEARCH

lib/readline/rlprivate.h
        - SF_PATTERN: new flag for non-incremental search contexts, means to
          treat search string as a pattern (maps to PATTERN_SEARCH)

lib/readline/search.c
        - noninc_dosearch: takes an additional `flags' argument for SF_PATTERN
        - noninc_search_from_pos: takes an additional `flags' argument for
          SF_PATTERN
        - noninc_dosearch: pass flags argument through to noninc_search_from_pos
        - _rl_nsearch_init: if we are in vi command mode, and `pchar' (key used
          to invoke the search) is `?' or `/', add SF_PATTERN to the flags
          to conform to Posix spec for vi-mode editing
        - _rl_nsearch_dosearch: if cxt->sflags indicates that we should do a
          pattern search, pass SF_PATTERN to noninc_search_from_pos
        - rl_noninc_forward_search_again: if in vi command mode and key == `N',
          make sure flags arg passed to noninc_dosearch includes SF_PATTERN
        - rl_noninc_reverse_search_again: if in vi command mode and key == `n',
          make sure flags arg passed to noninc_dosearch includes SF_PATTERN
        - rl_history_search_internal: pass extra flags arg to noninc_search_from_pos

                                   11/18
                                   -----
lib/readline/search.c
        - noninc_search_from_pos: takes a new argument, a pointer to int where
          it stores the offset of the match in the history line (if non-NULL),
          modified callers
        - rl_history_search_internal: pass newcol pointer to
          noninc_search_from_pos to avoid having to recompute the match offset
          in the matching history entry

config.h.in
        - define HAVE_FNMATCH if we have the fnmatch function (configure was
          already checking for it)

lib/readline/histsearch.c
        - _hs_history_patsearch: transform the pattern into one ending in a
          `*' to avoid having to perform multiple match attempts from each
          index in the history line
        - history_search_internal: changes to handle pattern matching if
          PATTERN_SEARCH is in the flags and HAVE_FNMATCH is defined.  This
          makes vi-mode history searching treat the user-specified search
          string as an fnmatch pattern, as Posix requires.  Fixes issue
          reported by <jwdevel@gmail.com>

                                   11/19
                                   -----
builtins/shopt.def
        - shopt_enable_hostname_completion: only declare this if READLINE
          defined, since that's the only time it's used.  Reported by
          isabella parakiss <izaberina@gmail.com>

                                   11/20
                                   -----
builtins/common.c
        - display_signal_list: make `kill -l 0' print `EXIT', modifying change
          from 9/17

                                   11/21
                                   -----
subst.c
        - expand_word_internal: when the shell encounters a backslash as the
          last character of the string, don't try to add a '\'0' to the end
          of the string if the string is quoted, just add a <CTLESC><\> and
          skip to the end of string processing.  Fixes oob-read error
          reported by Jerzy Kramarz <op7ica@gmail.com>

test.c
        - two_arguments: check argv[pos][1] before checking argv[pos][2] when
          looking for a unary argument.  Fixes oob-read error on single `-'
          in unary operator position reported by Jerzy Kramarz
          <op7ica@gmail.com>
        - ANDOR: check s[1] before checking s[2] in case s[1] == end of string.
          Fixes oob-read error reported by Jerzy Kramarz <op7ica@gmail.com>

subst.c
        - command_substitute: now takes additional flags argument, changed one
          caller (param_expand) to pass through PF_ASSIGNRHS flag; other callers
          pass 0
        - command_substitute: pass through flags argument to read_comsub
        - read_comsub: now takes additional new flags argument to indicate
          whether or not the word is in a context where word splitting will
          eventually be performed
        - read_comsub: if we are running in a context where word splitting
          will not take place (PF_ASSIGNRHS), we read a CTLESC, and CTLESC is
          in $IFS, add a CTLESC to make sure it gets through a round of
          dequoting

                                   11/23
                                   -----
parse.y
        - xparse_dolparen: since reset_parser frees the pushed string list,
          and this is supposed to be a separate parsing context, we need to
          save and restore pushed_string_list around the call to parse_string
          and reset_parser.  Fixes bug reported by Dan Douglas
          <ormaaj@gmail.com>

bushhist.h
        - HISTEXPAND_DEFAULT: default value of history_expansion, moved here
          from flags.c

flags.[ch]
        - histexp_flag: new variable, this is what set -H/set -o histexpand
          sets; history_expansion set to value of this variable; defaults to 0
        - history_expansion: now set to HISTEXPAND_DEFAULT

bushhist.c
        - bush_history_reinit: if interact == 0, set history_expansion to the
          value of histexp_flag, to allow -H option to enable history
          expansion
        - bush_history_reinit: if interact == 0, make sure
          history_expansion_inhibited is set opposite of histexp_flag, so
          enabling history expansion with -H invocation option turns off
          inhibited expansion. If interactive shell, we turn it off so
          history_expansion controls whether or not history expansion takes
          place. In practice, this function is always called with interact == 0,
          and -c command still doesn't perform history expansion

shell.c
        - init_interactive: make sure histexp_flag and history_expansion are
          identical in an interactive shell; allows both -H/+H option and
          default compilation options (HISTEXPAND_DEFAULT) to work

                                   11/24
                                   -----
subst.c
        - get_word_from_string: take advantage of the fact that SEPARATORS is
          always a (possibly local) copy of IFS, so build a local charmap of
          separators and use it instead of the (cached and possibly stale)
          ifs_cmap map and isifs macro.  Fixes bug with -N stripping leading
          whitespace reported by Clark Wang <clarkw@vmware.com>

                                   11/25
                                   -----
builtins/read.def
        - read_builtin: make `i' volatile, since auto variables are technically
          undefined after a longjmp, and a timeout on SIGALRM causes one.
          Fix suggested by Dmitry Goncharov <dgoncharov@users.sf.net>

                                   11/27
                                   -----
parse.y
        - shell_getc: if we are reading input from a string, and we get the
          ending '\0', and we are not expanding an alias, return EOF right
          away.  It might be an eval'ed string that has a syntax error.
          Fixes bug reported by Dan Douglas <ormaaj@gmail.com>

                                   11/28
                                   -----
subst.c
        - expand_word_internal: if we're expanding a quoted string containing
          a tilde as the first character of a word, only expand the tilde if
          we're expanding an array subscript (Q_ARRAYSUB), not if we're
          expanding any arithmetic expression (Q_ARITH).  This fixes a
          backwards compatibility issue with expressions like ~0 reported by
          Bize Ma <binaryzebra@gmail.com>

subst.c
        - parameter_brace_expand_indir: if the variable is not special and
          the indirect variable is unset (!variable where variable is unset),
          report an error.  This is a slight incompatibility with previous
          versions, which did not differentiate between indirecting an unset
          variable and an indirect expansion resulting in an unset variable.
          Fixes omission reported by otenba@protonmail.com

                                   11/30
                                   -----
lib/readline/doc/{rluser.texi,readline.3},doc/bush.1
        - do-uppercase-version: since this doesn't actually exist, replace it
          with do-lowercase-version, with the caveat that do-lowercase-version
          results in undefined behavior if bound to a character that's
          already lowercase.  Suggested by Branden Robinson
          <g.branden.robinson@gmail.com>

lib/readline/doc/rluser.texi
        - history-substring-search-forward: was misspelled as "substr-search";
          ditto for search-backward

doc/bush.1
        - history-substring-search-{backward,forward}: add documentation, text
          straight from readline.3

jobs.c
        - initialize_job_control: if the terminal's process group is valid,
          but the shell is not the foreground process, check for terminating
          signals (like SIGHUP, which the kernel would send if the process
          group were orphaned) during the loop where we try to stop the shell
          if it's not in the foreground.  Not a perfect solution; the kernel
          might not send SIGHUP

                                   12/1
                                   ----
jobs.c
        - initialize_job_control: only go through the SIGTTIN loop 16 times at
          most before deciding we're in the background and probably a member of
          an orphaned process group; set original_pgrp to the terminal's pgrp
          (so the eventual give_terminal_to doesn't leave the terminal in the
          wrong pgrp); and bail on job control initialization

tests/run-all
        - unset SHELLOPTS to avoid its options `polluting' the test
          environment.  Suggestion from Vladimir Marek
          <Vladimir.Marek@oracle.com>

tests/execscript
        - use $PWD/exec8.sub to protect against someone who has a cd command
          in his bushrc.  Report from  Vladimir Marek
          <Vladimir.Marek@oracle.com> 

                                   12/2
                                   ----
shell.c
        - open_shell_script: call end_job_control before exiting the shell in
          case we were run as `bush -i script' and there is a problem with
          executing `script'.  If we don't, the terminal ends up in the wrong
          process group.  Fix from Clark Wang <clarkw@vmware.com>

                                   12/3
                                   ----
parse.y
        - read_comsub: if we look for a character following a `<' and it's
          not `<' (indicating that we don't have to read a here-document),
          make sure we push that character back and go through the loop again
          so we note the right word start location.  Fixes bug reported by
          parasite parasite <42parasite@gmail.com>

subst.c
        - parameter_brace_expand_indir: clean up checks for unset variables to
          minimize incompatibilities with previous versions

                                   12/5
                                   ----
lib/readline/history.c
        - add_history: don't update history_length until all of the updates to
          the_history are complete, so history_length is always consistent.
          Report and fix from Hong Cho <hong.cho@citrix.com>

bushline.c
        - bush_backward_shellword: fix to work better at the end of the line,
          with multiple trailing whitespace characters.  Inspired by report
          from Kirill Timofeev <kt97679@gmail.com>

Makefile.in
        - bushbug: use `^' as the sed delimiter instead of `%'; some compilers
          use `%' in CFLAGS.  Report from  Vladimir Marek
          <Vladimir.Marek@oracle.com> 

                                   12/6
                                   ----
test.c
        - test_unop: make sure op[1] != 0 before testing op[2]
        - term: make sure argv[pos][1] != 0 before testing argv[pos][2].  Fixes
          oob-read reported by Jerzy Kramarz <op7ica@gmail.com>

                                   12/7
                                   ----
lib/glob/glob.c
        - glob_filename: assign the return value of realloc (results, ...) to
          a temp pointer, so if realloc returns NULL, we make sure we free
          results.  Report from Kirill Timofeev <kt97679@gmail.com>

                                   12/12
                                   -----
lib/sh/shquote.c
        - sh_backslash_quote: if FLAGS&2, backslash-quote other single-byte
          characters that are in the current locale's <blank> character class

builtins/printf.def
        - printf_builtin: when processing the `%q' format, make sure to
          backslash quote all <blank> characters by making sure that FLAGS
          passed to sh_backslash_quote includes 2.  Fixes issue for certain
          iso-8859-1 locales where character 160 (octal 240, hex 0xa0) is a
          non-breaking space. Report from Stephane Chazelas
          <stephane.chazelas@gmail.com>

lib/sh/eaccess.c
        - sh_stat: if DEV_FD_STAT_BROKEN is defined, take /dev/fd/N and turn
          it into a stat on file descriptor N, as if /dev/fd were not
          available.  This is the case on some old versions of SunOS.  Report
          and patch from Dmitry Goncharov <dgoncharov@users.sf.net>

config.h.in
        - DEV_FD_STAT_BROKEN: add define

configure.ac
        - --enable-dev-fd-stat-broken: new command-line option, defines
          DEV_FD_STAT_BROKEN if supplied at configure time

doc/bushref.texi
        - --enable-dev-fd-stat-broken: document new command-line option for
          configure

arrayfunc.c
        - assoc_expand_once: new variable, declared here just because

arrayfunc.h
        - assoc_expand_once: extern declaration
        - AV_NOEXPAND: new flag value for the array_value family of functions:
          means to not run associative array subscripts through word expansion

builtins/set.def
        - unset_builtin: call unbind_array_element with assoc_expand_once as
          third arg, controls whether we expand associative array subscripts
          (if 1, we suppress the usual expansion).  With accompanying shopt,
          provides backwards compatible option to solve problem with quotes
          and other characters in associative array subscripts pointed out
          most recently by Mingye Wang (Arthur2e5) <arthur200126@gmail.com>

builtins/shopt.def
        - assoc_expand_once: new option, controls value of internal variable
          with the same name. Currently undocumented because I'm not completely
          sold on the name

expr.c
        - evalexp: now takes a second argument, flags. Changed all callers in
          multiple other files (builtins/let.def,execute_cmd.c,arrayfunc.c,
          subst.c,test.c,variables.c)

externs.h
        - EXP_EXPANDED, new flag for second argument to evalexp

builtins/let.def
        - let_builtin: add EXP_EXPANDED to flags passed to evalexp

execute_cmd.c
        - execute_arith_command: add EXP_EXPANDED to flags passed to evalexp,
          since the command string is run through expand_words_no_vars before
          being evaluated

expr.c
        - set expression-global variable already_expanded if flags arg to
          evalexp contains EXP_EXPANDED
        - if assoc_expand_once option set and already_expanded flag set, pass
          1 in flags to array_variable_part to skip over quotes and expansions
          in the subscript
        - if those two variables set, pass AV_NOEXPAND as flag to
          get_array_value to prevent word expansions on the subscript

arrayfunc.c
        - if flags passed to unbind_array_element includes 1, pass flag on to
          skipsubscript so we don't expect matched quotes or process
          expansions in the subscript
        - if flags to array_value_internal include AV_NOEXPAND, pass 1 as flag
          to array_variable_part to pass along to skipsubscript
        - if flags to array_value_internal include AV_NOEXPAND, don't call
          expand_assignment_string_to_string; just use the unexpanded subscript
          to produce the key [THIS IS A WORK IN PROGRESS]

                                   12/14
                                   -----
subst.h
        - ASS_NOEXPAND: assignment flag that inhibits expansion of associative
          array subscripts

variables.c
        - bind_int_variable: takes new flags arg; flags are taken from the
          ASS_ set of assignment flags, changed callers (bushline.c, expr.c,
          pcomplete.c)
        - bind_int_variable: if flags includes ASS_NOEXPAND, pass 1 as flag to
          valid_array_reference and array_variable_part to pass along to
          skipsubscript, so we don't try to skip over quoted strings in the
          subscript
        - bind_int_variable: pass flags along to assign_array_element

variables.h
        - bind_int_variable: updated extern declaration with new flags arg

expr.c
        - expr_bind_variable: if the assoc_expand_once option is enabled, and
          the flags to evalexp indicate that we have already run the expression
          through word expansion, pass ASS_NOEXPAND as flag to bind_int_variable

arrayfunc.c
        - assign_array_element: if flags includes ASS_NOEXPAND, pass 1 as flag
          to array_variable_name to pass along to skipsubscript
        - assign_array_element: if flags includes ASS_NOEXPAND, don't run an
          associative array subscript through word expansion, just use as-is

subst.c
        - param_expand: call evalexp with EXP_EXPANDED flag for arithmetic
          substitution because the string has already been expanded with
          expand_arith_string

                                   12/15
                                   -----
builtins/read.def
        - read_builtin: use value of assoc_expand_once for valid_array_reference
          as with other uses
        - bind_read_variable: if assoc_expand_once is set, pass ASS_NOEXPAND
          to assign_array_element

general.c
        - assignment: instead of checking whether flags == 0 to allow a `[',
          explicitly check for (flags&1) to disallow it.  This leaves the door
          open for additional flag values

builtins/printf.def
        - printf_builtin: use value of assoc_expand_once for
          valid_array_reference as with other uses
        - bind_printf_variable: if assoc_expand_once is set, pass ASS_NOEXPAND
          to assign_array_element

                                   12/16
                                   -----
builtins/history.def
        - change history -d option to handle negative arguments; negative
          arguments offset from the end of the history list (last_position + 1
          so history -d -1 deletes the history -d command that just got
          added).  Original patch from Piotr Grzybowski <narsil.pl@gmail.com>

doc/bush.1,lib/readline/doc/hsuser.texi
        - documented new behavior of negative offsets for `history -d'

                                   12/17
                                   -----
lib/readline/history.c
        - remove_history: use memmove to move the history list around instead
          of a loop that copies pointers one at a time, similar to add_history

                                   12/19
                                   -----
configure.ac
        - linux: make sure PGRP_PIPE is defined unconditionally for all kernel
          versions greater than 2.3.*

lib/readline/history.c
        - clear_history: when clearing the history, reset history_base to 1
          (its default)
        - remove_history_range: new function, removes a set of history entries
          and returns them all for deallocation

lib/readline/history.h
        - remove_history_range: extern declaration

                                   12/20
                                   -----
execute_cmd.c
        - eval_arith_for_expr: pass EXP_EXPANDED to evalexp, since we run the
          expression through expand_words_no_vars

                                   12/21
                                   -----
input.c
        - b_fill_buffer: when read returns EOF or error, and we reset the
          buffer and pointers, reset the input pointer to 0.  Fixes issue
          reported by Stephane Chazelas <stephane.chazelas@gmail.com>

                                   12/22
                                   -----
arrayfunc.[ch],subst.c
        - array_expand_index: added new FLAGS argument, reserved for future use,
          changed callers


                                   12/24
                                   -----
variables.c
        - can_optimize_assignment,optimized_assignment: see if we can detect
          whether or not we're trying to append a string to a string variable,
          and optimize that using realloc/strcpy.  Based on a log-ago
          suggestion from Aharon Robbins <arnold@skeeve.com>

                                   12/27
                                   -----
builtins/help.def
        - help_builtin: don't pass return value from ngettext() directly to
          printf

                                   12/28
                                   -----
sig.c
        - set_signal_handler: set SA_RESTART for SIGWINCH, so window size
          changes don't interrupt open/read/write.  Suggested by
          Andriy Prystupa <andriy.prystupa@globallogic.com> back in 10/2016

                                   12/30
                                   -----
execute_cmd.c
        - coproc_pidchk: if MULTIPLE_COPROCS, call cpl_search to find coproc
          associated with pid, don't remove it from the list with cpl_delete.
          Just mark as dead and wait for coproc_reap/cpl_reap to take care
          of disposing it
        - execute_coproc: NEW FEATURE: run the coproc name through word
          expansion before creating the coproc; this allows unique coprocs
          to be created in loops. Originally requested way back in 2012 by
          Erik Brandsberg <ebrandsberg@juniper.net>

command.h
        - subshell_com: now has a line number member: line

make_cmd.c
        - make_subshell_command: assign current line number (line number of the
          ending right paren) to `line' member

copy_cmd.c
        - copy_subshell_command: copy the `line' member

execute_command.c
        - execute_command_internal: when executing a user subshell (`(command)'),
          set the line number and line number for the ERR trap from the line
          number saved in the subshell command struct.  Fix from
          Eduardo A. Bustamante López <dualbus@gmail.com>
        - execute_arith_command: set line number for ERR trap from line number
          saved in the arith command struct.  Fix from
          Eduardo A. Bustamante López <dualbus@gmail.com>
        - execute_cond_command: set line number for ERR trap from line number
          saved in the cond command struct.  Fix from
          Eduardo A. Bustamante López <dualbus@gmail.com>

variables.c
        - bind_variable_internal: move can_optimize_assignment call to the
          right place

                                   12/31
                                   -----
variables.c
        - find_variable_nameref: treat a circular variable reference as
          referring to a variable of that name in the global scope (for now),
          if one exists.  PROVISIONAL change: inspired by suggestion back in
          6/2016 by Grisha Levit <grishalevit@gmail.com>

                                 1/2/2017
                                 --------
{expr,general,hashcmd}.c
        - include flags.h for flag values

make_cmd.c
        - include shell.h instead of the files it includes

flags.h
        - new extern declarations for want_pending_command, read_from_stdin

subst.h
        - add extern declaration for expanding_redir, assigning_in_environment

trap.h
        - add extern declaration for running_trap

execute_cmd.h
        - added extern declarations for variables declared in execute_cmd.c,
          changed files that declare lots of extern variables

shell.h
        - added extern declarations for variables declared in shell.c,
          changed files that declare lots of extern variables 

parser.h
        - added extern declarations for variables declared in parse.y,
          changed files that declare lots of extern variables 

[lots of changes to reduce the number of extern declarations in C and DEF files]

parse.y
        - xparse_dolparen: need ALIAS or DPAREN_ARITHMETIC to be defined to
          use STRING_SAVER

                                    1/3
                                    ---
sig.c
        - termsig_handler: don't call end_job_control if subshell_environment
          indicates that we're in a command or process substitution.
          Provisional fix for bug reported by Russell King <rmk@armlinux.org.uk>

jobs.c
        - end_job_control: only attempt to give the terminal back to
          original_pgrp if job_control != 0; don't test interactive_shell

execute_cmd.c
        - execute_disk_command: call QUIT after search_for_command, since
          the only time QUIT gets called is when the path is actually
          searched.  It doesn't happen for an absolute pathname.  Fix for
          bug reported by Russell King <rmk@armlinux.org.uk>

                                   1/16
                                   ----
lib/glob/glob.c
        - extglob_skipname,wextglob_skipname: if we don't find a reason to
          not skip the name in any subpattern (r returns 0 for any subpattern),
          return 1 because we should skip the name
        - extglob_skipname,wextglob_skipname: if we don't find a reason to
          not skip the name in any subpattern, but the first part of the extglob
          pattern is a wildcard (`*(pat)'), check the rest of the pattern, if
          any, to decide whether or not to skip the name. Fixes bug reported
          by Grisha Levit <grishalevit@gmail.com>

lib/glob/glob_loop.c
        - CHAR -> GCHAR (unsigned char); change uses of CHAR to GCHAR

lib/glob/glob.c
        - wchkname -> wskipname
        - wskipname: now takes a third `flags' argument, like the other variants
          of skipname

                                   1/17
                                   ----
redir.c
        - here_document_to_fd: set the file descriptor open for writing to the
          here document to be close-on-exec.  Fixes bug reported by
          Siteshwar Vashisht <svashisht@redhat.com>

                                   1/18
                                   ----
{gmisc,gm_loop}.c
        - match_pattern_char,match_pattern_wchar: moved to gm_loop.c (new file),
          compile twice for single and wide characters as with the rest of
          the functions
        - umatchlen,wmatchlen: ditto
        - extglob_pattern_p: move to gm_loop.c, generalize for regular and
          wide-char versions

                                   1/19
                                   ----
lib/readline/complete.c
        - stat_char: fix small memory leak if stat/lstat returns -1

bushline.c
        - bush_filename_stat_hook,bush_directory_completion_hook: make sure
          expand_prompt_string is caled wth W_NOPROCSUB flag
        - directory_exists: don't dequote the filename passed as an argument;
          this function should never get quoted pathnames

subst.c
        - expand_word_internal: when calling expand_word_internal recursively
          after reading a double-quoted string, make sure the W_NOCOMSUB and
          W_NOPROCSUB flags make it to the recursive invocation.  Fixes bug
          reported by Jens Heyens <jens.heyens@cispa.saarland>

                                   1/23
                                   ----
lib/readline/signals.c
        - _rl_orig_sigset: original signal mask, set and restored by
          rl_set_signals (rl_clear_signals doesn't block signals).  If we
          are not installing signal handlers, just save signal mask each
          time rl_set_signals is called

lib/readline/input.c
        - rl_getc: use _rl_orig_sigmask in the call to pselect(), so we block
          the set of signals originally blocked by the calling application.
          Fixes bug reported by Frédéric Brière <fbriere@fbriere.net>

parse.y
        - yy_readline_get: try to unset NONBLOCK mode on readline's input
          file descriptor before calling readline(). Inspired by report from
          Siteshwar Vashisht <svashisht@redhat.com>

                                   1/30
                                   ----
parse.y
        - parse_comsub: don't unconditionally set the LEX_WASDOL flag when we
          see a `$'; we should toggle it to accommodate things like $$.
          Fixes bug reported by Christian Weisgerber <naddy@mips.inka.de>
        - parse_matched_pair: do the same thing with LEX_WASDOL

                                    2/1
                                    ---
jobs.h
        - JWAIT_PERROR,JWAIT_FORCE: new defines for the wait_for_ family of
          functions

jobs.c
        - wait_for_job, wait_for_any_job: take new flags argument for use by
          the wait builtin
        - wait_for_job: if JWAIT_FORCE flag supplied, loop waiting for job to
          terminate instead of change state
        - wait_for_single_pid: if JWAIT_FORCE flag supplied, loop waiting for
          child process to terminate instead of change state

builtins/wait.def
        - takes a new `-f' option, signifying to wait until the specified job 
          or process terminates, instead of changes state

doc/{bush.1,bushref.texi}
        - wait: document the new -f option and its behavior when job control
          is enabled
        - job control: add a paragraph describing how the wait builtin changes
          behavior when job control is enabled: it returns when a job changes
          state

                                    2/2
                                    ---
examples/loadables/fdflags.c
        - fdflags: new loadable builtin to set and unset file descriptor flags
          (such as non-blocking, though bush undoes that) for descriptors bush
          has open. Developed in consultation with Christos Zoulas
          <christos@zoulas.com>

                                    2/3
                                    ---

lib/readline/text.c
        - rl_previous_screen_line: attempt to move to the same column on the
          previous screen line of the current readline buffer by moving back
          a number of characters equal to the screen width
        - rl_next_screen_line: attempt to move to the same column on the
          next screen line of the current readline buffer by moving forward
          a number of characters equal to the screen width. Both originally
          suggested by Hans Ginzel <hans@matfyz.cz>

lib/readline/readline.h
        - rl_{next,previous}_screen_line: extern declarations

lib/readline/funmap.c
        - {next,previous}-screen-line: new bindable command names

lib/readline/doc/{rluser.texi,readline.3}
        - {next,previous}-screen-line: document behavior, including limitations

                                    2/5
                                    ---
lib/readline/input.c
        - rl_read_key: when reading input from a macro, make sure to return
          the next character as an unsigned char, so we handle multibyte
          character sequences correctly.  Report and fix from Grisha Levit
          <grishalevit@gmail.com>

                                    2/6
                                    ---
shell.c
        - --pretty-print: new invocation option, currently undocumented, dumps
          a pretty-printed version of a shell script given as an argument to
          stdout
        - main: call pretty_print_loop() if we're in pretty-printing mode in
          a non-interactive shell

eval.c
        - pretty_print_loop: new function, similar to reader_loop, reads
          commands and prints them by displaying the result from
          make_command_string()

externs.h
        - pretty_print_loop: new extern declaration

                                    2/9
                                    ---
doc/{bush.1,bushref.texi}
        - here strings: correct documentation to note they do not undergo
          brace expansion. Report from Conor McCarthy <mr.spuratic@gmail.com>

                                    2/9
                                    ---
lib/readline/display.c
        - expand_prompt: instead of recomputing the line break offsets for
          prompts that span multiple screen lines on every call to rl_redisplay,
          do it here. Manage a local array local_prompt_newlines; set an offset
          every time `physchars' hits a multiple of the screen width.  Inspired
          by https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=843819
        - rl_redisplay: don't calculate multi-line prompt line break indices
          here; use the values calculated by expand_prompt
        - rl_{save,restore}_prompt: save and restore local_prompt_newlines

                                   2/11
                                   ----
lib/readline/mbutil.c
        - _rl_find_prev_mbchar_internal: since we're traversing the string
          from the beginning, shortcut non-multibyte characters in a UTF-8
          locale

parse.y
        - parse_comsub: if we are parsing a here document with a quoted
          delimiter (LEX_QUOTEDDOC), we should not remove <backslash><newline>
          pairs from the body of the here document.  Need to add LEX_QUOTEDDOC
          to the values in tflags when calling shell_getc.  Fixes bug reported
          by Michael Homer <michael.homer@ecs.vuw.ac.nz>, patch was originally
          contributed by Geir Hauge <geir.hauge@gmail.com>

                                   2/15
                                   ----
jobs.c
        - bgp_add: if hashed pid collides with bgpids.head index, print a
          warning and move to the next index.  Attempt to avoid collision
          problem reported by Graham Northup <northug@clarkson.edu>

                                   2/17
                                   ----
subst.c
        - process_substitute: call remove_quoted_escapes on the command string
          like command substitution does, since the string will be run through
          the parser again.  Fixes bug reported by David Simmons
          <bug-bush@tmp.davidsimmons.com>

config-top.h
        - STATIC_PATH_VALUE: new config variable, undefined by default

variables.c
        - shell_initialize: if STATIC_PATH_VALUE is defined, use it to set the
          PATH variable at shell startup, overriding the environment and any
          value for DEFAULT_PATH_VALUE.  Based on a suggestion from
          Lonnie Abelbeck <lonnie@abelbeck.com>

                                   2/18
                                   ----
shell.c
        - maybe_make_restricted: clear the hash table before making the PATH
          variable read-only by calling stupidly_hack_special_variables.
          Suggestion from Lonnie Abelbeck <lonnie@abelbeck.com>

subst.c
        - expand_string_for_pat: change expansion of WORD in ${param[%[%]][#[#]]word}
          to use this new function, initially identical to
          expand_string_for_rhs
        - getpattern: use expand_string_for_pat to expand the pattern

                                   2/19
                                   ----
subst.c
        - expand_string_for_rhs: now that this is only used to expand the RHS
          of the various non-pattern ${paramOPword} expansions, set
          expand_no_split_dollar_star depending on whether or not the entire
          brace expansion is going to be subjected to word splitting: if it's
          quoted or if IFS is set but null, we will not be splitting so we set
          this to 1 and let $* expand to separate fields separated by a space.
          This was heavily debated back in October 2014 and resulted in Posix
          interp 888. Reported by Martijn Dekker <martijn@inlv.org>

                                   2/20
                                   ----
subst.c
        - expand_string_for_rhs: now takes `op' (brace expansion operator) as
          an additional argument; changed call in parameter_brace_expand_rhs
        - expand_string_for_rhs: make sure to set expand_no_split_dollar_star
          if `op' is `=', since we are supposed to preserve the assignment
          statement expansion semantics on the RHS of ${param=word}

jobs.c
        - bgp_delindex: make sure to set ps->pid to NO_PID so we more
          effectively remove it from the hash table. It shouldn't matter as
          long as nothing in pidstat_table points to it, but better to be safe
        - bgp_delete,bgp_search: generalize previous collision detection to
          loop detection: abort search if we are going to go back to the
          first index we tried

                                   2/21
                                   ----
lib/readline/vi_mode.c
        - rl_vi_bword: if we're trying to move backward to non-whitespace
          in a line that begins with whitespace, make sure we don't move
          point to 0 and test memory locations before the start of the
          buffer. Report and fix from Jason Hood <jadoxa@yahoo.com.au>

lib/readline/display.c
        - expand_prompt: if _rl_screenwith == 0, call rl_reset_screen_size to
          initialize it. If it's still 0 after that, guess that the screen
          width is 80 and use that to guess how many screen lines the prompt
          consumes

lib/readline/readline.c
        - readline_internal_setup: if in emacs editing mode, and we are
          showing the editing mode in the prompt, call _rl_reset_prompt() to
          make sure that the updated setting of _rl_show_mode_in_prompt
          (presumably set in an inputrc file) is reflected in the redisplay
          performed by rl_callback_newline via readline_internal_setup.
          Fix from Jason Hood <jadoxa@yahoo.com.au>

                                   2/22
                                   ----
builtins/complete.def
        - print_one_completion,print_compopts: make sure to display the
          `nosort' and `noquote' options if they've been set for a particular
          compspec.  Fix from Grisha Levit <grishalevit@gmail.com>

builtins/read.def
        - read_builtin: if -e is supplied, read needs to free rlbuf before
          returning, since it uses discard_unwind_frame at that point. Bug
          and fix from ZhangXiao <xiao.zhang@windriver.com>

execute_cmd.c
        - execute_for_command: when using a nameref as the for loop control
          variable, make sure we check for readonly namerefs and make sure
          that we force bind_variable to enforce restrictions on nameref
          assignments. Fix from Grisha Levit <grishalevit@gmail.com>

                                   2/23
                                   ----
general.c
        - make_absolute: convert deprecated cygwin_conv_to_full_posix_path
          to cygwin_conv_path (CCP_WIN_A_TO_POSIX, ...)

{shell,variables}.c,config-top.h
        - modify change from 2/17: rename STATIC_PATH_VALUE to RBUSH_STATIC_PATH_VALUE;
          don't use it in shell_initialize; set PATH to it just before
          imposing restricted shell restrictions

                                   2/24
                                   ----
subst.c
        - expand_string_for_rhs: revert change from 2/19 concerning setting
          expand_no_split_dollar_star so we are consistent with the Posix
          examples. This anticipates Martijn Dekker initiating an austin
          group discussion about this case

                                   2/25
                                   ----
pcomplete.c
        - gen_shell_function_matches: if COMPREPLY is an associative array,
          don't coerce it to an indexed array, which will fail to produce any
          matches anyway.  Report from Grisha Levit <grishalevit@gmail.com>
        - bind_comp_words: if COMP_WORDS exists as a nameref variable, ignore
          the nameref attribute. Report from Grisha Levit
          <grishalevit@gmail.com>

subst.c
        - parameter_brace_expand: if expand_no_split_dollar_star is set, make
          sure chk_atstar treats ${var[*]} as quoted by passing Q_DOUBLE_QUOTES
          as the second argument.  Fixes differing treatment of $* and ${v[*]}
          reported by Grisha Levit <grishalevit@gmail.com>, because otherwise
          *contains_dollar_at gets set to 1 and the word is inappropriately
          split

                                    3/1
                                    ---
subst.c
        - expand_word_list_internal: if a variable assignment fails (e.g., due
          to a readonly variable) in a non-interactive posix mode shell, don't
          abort the shell if the assignment is being performed by the command
          builtin, even if it's something like `command eval v=1'.  Fixes
          RedHat bug https://bugzilla.redhat.com/show_bug.cgi?id=1389838
          (reported by Denys Vlasenko)

                                    3/3
                                    ---
builtins/shopt.def
        - set_compatibility_level: make sure that changing the compatibility
          level sets or modifies BUSH_COMPAT. Fixes bug reported by
          Stephane Chazelas <stephane.chazelas@gmail.com>

lib/glob/smatch.c
        - is_cclass: broke into two functions: is_valid_cclass and cclass_test,
          for future expansion. No functionality change

lib/glob/sm_loop.c
        - BRACKMATCH: when testing a character against a character class name,
          use the unfolded (original) character, since we're not performing a
          comparison. This is what glibc does.  Fixes bug reported by
          Lukáš BaÅinka <lukas.barinka@boxtrap.net>

                                    3/4
                                    ---
doc/{bush.1,bushref.texi}
        - note that the arguments to -eq and the rest of the arithmetic
          operators are evaluated as expressions when using [[.  Report from
          Rob la Lau <rob@ohreally.nl>


                                    3/7
                                    ---
lib/readline/display.c
        - update_line: completely rewrote the code that handles line wrapping
          in the presence of multibyte/double-width characters; punts to a
          dumb update in cases where the number of screen positions doesn't
          match
        - update_line: in one case, where we are deleting characters from the
          line, if we are writing a non-space into the last screen character
          position, note that we are no longer using a space as a placeholder
          for a line wrap where there is a multi-width character that won't
          fit on the screen line (wrapped_line[current_line+1] = 0)

                                   3/10
                                   ----
lib/readline/readline.c
        - bind_arrow_keys_internal: add default key bindings for control-
          arrow keys, suggested by Per Bothner <per@bothner.com>

                                   3/13
                                   ----
doc/{bush.1,bushref.texi}
        - clarify the prompt strings the undergo expansion (PS0, PS1, PS2, and
          PS4) before being displayed.  Based on a report from Grisha Levit
          <grishalevit@gmail.com>

                                   3/14
                                   ----
input.c
        - bufstream_ungetc: return EOF if being asked to unget a character to
          a NULL buffer
        - buffered_getchar: check buffered_fd is valid and buffers[buffered_fd]
          is non-NULL before trying to dereference. Fixes bug reported by
          floyd <floyd@floyd.ch>

execute_cmd.c
        - execute_null_command: if we fork to execute the command, the subshell
          is not interactive
        - execute_null_command: for safety's sake, if a redirection attached
          to a null command affects fd 0 or the fd the shell is reading for
          input, and the redirection can potentially change or close that file
          descriptor, force a fork so the redirection is done in a subshell

                                   3/15
                                   ----
lib/readline/display.c
        - update_line: if we have to output some bytes, and we are outputting
          the prompt string, make sure we correct _rl_last_c_pos if we are
          at the wrap offset -- what if all of the characters in the prompt
          are invisible, so the visible length is 0?  Fixes display bug
          reported by Grisha Levit <grishalevit@gmail.com>

execute_cmd.c
        - undo_partial_redirects: new function, performs redirections specified
          in redirection_undo_list and disposes of them. Intended to be used
          to unwind redirections performed before a redirection error
        - dispose_partial_redirects: new function, disposes of
          redirection_undo_list and nulls the list
        - execute_command_internal: use undo_partial_redirects

execute_cmd.h
        - undo_partial_redirects: extern declaration
        - dispose_partial_redirects: extern declaration

subst.c
        - exp_jump_to_top_level: if we are throwing an expansion error while
          expanding a redirection (expanding_redir != 0), undo any undoable
          redirections by calling undo_partial_redirects() so we don't leave
          any in place

variables.c
        - initialize_shell_variables: if SHELLOPTS is in the environment,
          unset the readonly attribute on any existing variable with that
          name. It may have been created by processing a -o option on the
          command line.  Fixes issue reported by Stephane Chazelas
          <stephane.chazelas@gmail.com>

                                   3/16
                                   ----
lib/readline/histfile.c
        - read_history_range: short-circuit and do nothing if the history file
          is of 0 size
        - read_history_range: make sure the buffer is zero-terminated so the
          timestamp tests work right for history files of 1 character.  Report
          and recommended fix from Denis Martinez <denis.martinez@gmx.com>

lib/readline/complete.c
        - compute_lcd_of_matches: when trying to compute the common prefix
          of a set of matches while performing case-insensitive completion
          matching, don't sort the match list unless rl_sort_completion_matches
          is non-zero.  Fixes problem reported by Roee Bar <roee@arista.com>

                                   3/18
                                   ----
subst.c
        - extract_dollar_brace_string: handle process substitution embedded in
          a ${...} expansion in the same way as command substitution.  Reported
          by D630 <d630@posteo.net>

parse.y
        - LEX_GTLT: new flag, set by parse_matched_pair when a `<' or '>' is
          read
        - parse_matched_pair: handle an embedded process substitution like an
          embedded command substitution if we are parsing an array index or
          a dollar-brace expansion.  Reported by D630 <d630@posteo.net>

                                   3/21
                                   ----
subst.h
        - ASS_NOEVAL, ASS_NOLONGJMP: new values for assignments, used by
          make_variable_value

variables.c
        - make_variable_value: ASS_NOEVAL: if this is set, don't attempt
          arithmetic evaluation or case modification, just produce the value
          (still honor ASS_APPEND)
        - make_variable_value: ASS_NOLONGJMP: don't longjmp back to top_level
          if arithmetic evaluation fails due to a syntax error
        - bind_variable_internal: make sure aflags is passed to all calls to
          make_variable_value
        - push_temp_var: add ASS_NOLONGJMP to the flags passed to
          bind_variable_internal.  Fixes bug reported by D630 <d630@posteo.net>

bushline.c
        - bush_execute_unix_command: don't bother to attempt optimization by
          checking whether the call to parse_and_execute changes $READLINE_LINE;
          it can be defeated by the new code that optimizes appends to string
          variables. Bug reported by Grisha Levit <grishalevit@gmail.com>

                                   3/22
                                   ----
subst.c
        - expand_string_for_rhs: re-apply change from 2/19 based on discussion
          on the austin-group mailing list about how unquoted ${var-$*}
          expands when IFS is null.  Originally reported by Martijn Dekker
          <martijn@inlv.org>

                                   3/25
                                   ----
parse.y
        - read_token_word: if we read a WORD immediately after a CASE, FOR, or
          SELECT, increment `expecting_in_token' to note that we're going to
          be reading IN as the next non-newline token
        - special_case_tokens: if we're expecting an IN (expecting_in_token > 0)
          and we have an "in", return IN and decrement expecting_in_token. This
          is a better implementation of Posix grammar rule 6 than the previous
          code in that function (which is still there for posterity, but should
          eventually be removed).  Fixes bug reported by Torka Noda
          <kanito.tasoga@gmail.com>

subst.c
        - string_list_pos_params: if the expansion is not quoted, and IFS is
          null, return a string containing the quoted positional parameters
          separated by spaces.  Callers know what to do with the string
        - parameter_brace_substring,parameter_brace_remove_pattern,
          parameter_brace_transform,parameter_brace_patsub,parameter_brace_casemod:
          for the VT_POSPARMS case, after calling the operator-specific
          expansion function, which eventually calls string_list_pos_params,
          leave the returned string alone, since it's already quoted properly
        - parameter_brace_expand: after calling the above functions to perform
          expansions, if the expansion is being performed on an unquoted $*
          when IFS is null, set the W_SPLITSPACE flag in the return WORD_DESC
          so that splitting on spaces is performed on the already-quoted word.
          Fixes bug reported by Grisha Levit <grishalevit@gmail.com>

                                   3/28
                                   ----
subst.c
        - process_substitute: change so the subshell doesn't inherit the 'v'
          option, like command substitution now does (as of bush-4.4).
          Suggested by Grisha Levit <grishalevit@gmail.com>

                                   3/30
                                   ----
subst.c
        - parameter_brace_casemod: now takes a pflags parameter, like
          parameter_brace_patsub; changed callers
        - parameter_brace_transform: now takes a pflags parameter, like
          parameter_brace_patsub; changed callers
        - pos_params_pat_subst,pos_params_modcase: if mflags indicates we're
          on the rhs of an assignment statement and not going to perform
          word splitting, we're expanding $*, and $IFS is null, make sure
          string_list_pos_params treats the expansion as double-quoted, so
          the positional parameters will be concatenated.  Fixes bug reported
          by Grisha Levit <grishalevit@gmail.com>

                                   3/31
                                   ----
doc/{bush.1,bushref.texi}
        - add notes to the description of pipelines emphasizing that each
          element of a pipeline is executed in a subshell, referring to the
          description of a command execution environment, and that the
          lastpipe option can modify that behavior. From a discussion with
          Jean Delvare <jdelvare@suse.de>

                                    4/1
                                    ---
subst.c
        - expand_word_internal: set had_quoted_null to note for later if we
          expand '', "", or "$x" when x is unset
        - expand_word_internal: if we expand "$param" (or "${param}") and we
          come back with a single word with the W_HAVEQUOTEDNULL flag set,
          make sure we set had_quoted_null to remember it for later. In this
          case, if we already have seen a quoted null and we expanded $@ in
          this (sub)string expansion, we don't want to do any of the special
          $@ handling. In particular, we don't want to set *expanded_something,
          because that will result in word splitting and quoted null removal.
          Fixes bug reported by Grisha Levit <grishalevit@gmail.com>
        - parameter_brace_patsub: when expanding ${*/pat/sub} in the case
          where ifs_is_null != 0 and (pflags & PF_NOSPLIT2) (meaning we aren't
          going to be doing word splitting), pass MATCH_ASSIGNRHS so we do
          the right thing in this case. Part of a set of cases inspired by
          Grisha Levit <grishalevit@gmail.com>
        - param_expand: case '*': if we are on the rhs of an assignment
          (PF_ASSIGNRHS) and ifs is unset, and $1 == " ", we need to make sure
          string_list_dollar_at gets called with Q_DOUBLE_QUOTES so it quotes
          the positional parameters before joining them into a string with
          string_list_internal.  Otherwise, that first space gets removed by
          the implicit word splitting that gets performed.  Reported by
          Grisha Levit <grishalevit@gmail.com>

array.c
        - array_patsub,array_modcase: handle ${A[*]} identically to $* when
          not quoted and IFS is null (separate with spaces).  Makes things
          like ${A[*]/x/y} behave the same as ${*/x/y} when IFS is null

subst.c
        - parameter_brace_patsub,parameter_brace_casemod: if expanding ${A[*]}
          when the match is on the rhs of an assignment statement (PF_ASSIGNRHS)
          and ifs is null, make sure the match is performed as if it were
          quoted
        - parameter_brace_substring: now takes a PFLAGS argument
        - parameter_brace_substring: if expanding $* in a context where we
          don't want to do word splitting (expand_no_split_dollar_star &&
          PF_NOSPLIT2), make sure we expand $* as if it were quoted
        - parameter_brace_substring: if expanding an unquoted $* on the rhs of
          an assignment statement when IFS is null, make sure we expand the $*
          as if it were quoted

                                    4/4
                                    ---
doc/{bush.1,bushref.texi}
        - read: document that a delim argument of '' terminates each line when
          a NUL character appears

                                    4/5
                                    ---
subst.c
        - parameter_brace_expand_word: handle case where unquoted $@ is
          expanded in a context where word splitting is not performed (PF_NOSPLIT2)
          and IFS is not equal to the standard value
        - param_expand: handle case where unquoted $@ is expanded in a context
          where word splitting is not performed (PF_NOSPLIT2) and IFS is not
          equal to the standard value.  Fixes bug with IFS == $1 when expanding
          unquoted $@ reported by Grisha Levit <grishalevit@gmail.com>

                                    4/7
                                    ---
subst.c
        - pos_params_pat_subst: if MATCH_ASSIGNRHS is set, don't expand $*
          as quoted unless expand_no_split_dollar_star is also set. Fixes
          expansion bug reported on 4/4 by Grisha Levit <grishalevit@gmail.com>
        - parameter_brace_transform: if we transform unquoted A[@] or A[*]
          when IFS is null, don't quote the result of array_transform in the
          same way we don't quote the result of parameter_list_transform,
          since it will come back quoted.  Fixes bug reported by
          Grisha Levit <grishalevit@gmail.com>
        - list_transform: if we transform unquoted $* or ${a[*]} when IFS is
          null and expand_no_split_dollar_star is non-zero, call
          string_list_pos_params with Q_DOUBLE_QUOTES to inhibit splitting.
          We do this in all cases except @Q, which is inconsistent but more
          intuitive.
          Fixes bug reported by Grisha Levit <grishalevit@gmail.com>

                                    4/8
                                    ---
builtins/read.def
        - read_mbchar: if unbuffered == 2, we are running read -N and need to
          use zreadn to read the rest of the multibyte char, since the
          previous call to zreadn may have buffered characters.  Fixes bug
          reported by Stephane Chazelas <stephane.chazelas@gmail.com>

pathexp.h
        - QGLOB_CTLESC: new flag for quote_string_for_globbing: means to turn
          CTLESC CTLESC (quoted CTLESC that's usually removed as part of
          word splitting or quote removal) into CTLESC

pathexp.c
        - quote_string_for_globbing: if QGLOB_CTLESC is present in flags,
          turn CTLESC CTLESC into CTLESC, even if the first CTLESC is preceded
          by a backslash. Callers can't do this because the remaining CTLESC
          will be treated as a quoting character and turned into a backslash

execute_cmd.c
        - execute_case_command: if the pattern is not quoted, make sure to tell
          quote_string_for_globbing to turn CTLESC CTLESC into CTLESC by
          passing QGLOB_CTLESC.  Fixes bug reported 4/2 by Martijn Dekker
          <martijn@inlv.org>

                                    4/9
                                    ---
subst.c
        - string_transform: after calling ansiexpand for the `E' transformation,
          need to call dequote_escapes because ansiexpand assumes it is being
          called by the parser and arranges for ansicstr to quote CTLESC and
          CTLNUL with CTLESC.  Reported by Grisha Levit <grishalevit@gmail.com>

variables.c
        - mk_env_string: when exporting functions, run them through
          dequote_escapes because any strings containing CTLESC or CTLNUL are
          still quoted with CTLESC.  Reported by Grisha Levit
          <grishalevit@gmail.com>

subst.[ch]
        - quote_escapes,dequote_escapes: now take const char * argument

execute_cmd.c
        - execute_intern_function: if the function name contains CTLESC, run
          it through dequote_escapes just in case it got CTLESC quoting
          CTLESC or CTLNUL from the parser

                                   4/11
                                   ----
eval.c
        - reader_loop: make sure PS0 is expanded and displayed before
          incrementing the command number

parse.y
        - prompt_history_number:  function to make history number as reported
          by \!, or posix mode !!, be the same index that the (possibly multi-
          line) command will be stored with. The history library increments
          history_offset as soon as a new line is entered, and it's up to the
          history code to store the second and subsequent lines of a command
          in the same history entry.  If we are expanding PS0 or PS4, or
          a ${var@P} expansion, we're already past the history entry no
          matter what.  Inspired by patch from Grisha Levit
          <grishalevit@gmail.com>
        - decode_prompt_string: call prompt_history_number
        - decode_prompt_string: if expanding PS4 or ${var@P}, make the
          command number the same as reported by PS0/PS1/PS2

                                   4/12
                                   ----
support/Makefile.in
        - clean: remove man2html.o as part of this production instead of
          waiting until `distclean'. Reported by chrlis <chrlis@sbrella.com>

subst.c
        - string_list_pos_params: if we are expanding $* in a context where
          IFS is null and expand_no_split_dollar_star is set (no word
          splitting), use string_list_dollar_star to force the positional
          parameters to be joined without first separating them into a list
          and attempting to join them later.  Fixes problem with constructs
          like ${var=${*:1}}, pointed out by Grisha Levit
          <grishalevit@gmail.com>. This undoes change to @Q from 4/7, so
          list_transform change reverted

                                   4/19
                                   ----
builtins.h
        - added BUILTINS_H include guard

examples/loadables/Makefile.in
        - install loadables.h as sample include file, along with Makefile.inc

                                   4/23
                                   ----
bushline.c
        - maybe_make_readline_line: don't try to do anything if the passed
          NEW_LINE is NULL.  Report from Jaren Stangret <sirjaren@gmail.com>,
          fix from Eduardo Bustamante <dualbus@gmail.com>

                                   4/24
                                   ----
parse.y
        - xparse_dolparen: if the current token (the last thing read_token
          returned to yylex) is shell_eof_token, assume that it is the new
          bison lookahead token and clear it. Fixes bug reported by
          Werner Fink <werner@suse.de>

                                   4/25
                                   ----
doc/{bush.1,bushref.texi}
        - cmdhist: clarify that this option only has an effect if history is
          enabled. Suggested by Matthew Braun <matthew@powerplug.com>

                                   4/26
                                   ----
jobs.c
        - wait_for: if a non-interactive shell with job control enabled (set -m)
          detects that a foreground job died due to SIGINT, act as if the shell
          also received the SIGINT. Prompted by an austin-group-l discussion
        - waitchld: run SIGCHLD trap for each child exited even if job control
          is not enabled when in Posix mode. Prompted by an austin-group-l
          discussion

                                   4/27
                                   ----
lib/readline/histfile.c
        - read_history_range: if the history file is empty, free the history
          filename before returning. Report and fix from Eduardo Bustamante
          <dualbus@gmail.com>

lib/readline/bind.c
        - rl_parse_and_bind: make sure there is something, even if it's a
          quoted empty string, before the `:' in a key binding.  Report from
          Eduardo Bustamante <dualbus@gmail.com>
        - rl_parse_and_bind: if the right side of a key binding starts with a
          quote, make sure there's a matching close quote before treating it
          as a macro definition
        - rl_translate_keyseq: if a key sequence ends with \C- or \M- (or
          \C-\M-) make sure we break out of the loop if moving to the character
          to be translated is a NUL. Old code did this only in the \C-\M-
          case. Report from Eduardo Bustamante <dualbus@gmail.com>

                                   4/28
                                   ----
lib/glob/sm_loop.c
        - GMATCH: implement a clever technique from glibc that avoids
          backtracking past a `*' if we've already chosen to use it and need
          matches beyond it.  Look at https://research.swtch.com/glob for a
          longer explanation. This results in a significant speedup for globs
          with multiple instances of `*', especially with more than 4.

                                    5/2
                                    ---
lib/readline/bind.c
        - rl_translate_keyseq: make sure a trailing backslash in the key
          sequence is preserved. Report from Eduardo Bustamante
          <dualbus@gmail.com>

                                    5/3
                                    ---
builtins/builtin.def
        - builtin_builtin: make sure to set  this_shell_builtin to the builtin
          command being executed, overwriting `builtin'. Leave
          last_shell_builtin alone.  Fixes bug reported by Luiz Angelo Daros
          de Luca <luizluca@gmail.com>

jobs.c
        - waitchld: modify change of 4/26 to run SIGCHLD traps even if job
          control is not enabled

lib/readline/misc.c
        - rl_get_previous_history: if we didn't find a previous history entry
          to use, call rl_maybe_unsave_line before returning because we
          aren't going to use the saved line, and it has the same undo list
          as rl_undo_list.  Fixes fuzzing bug reported by Eduardo Bustamante
          <dualbus@gmail.com>
        - rl_get_{next,previous}_history: if there is no history list, don't
          bother doing anything

                                    5/4
                                    ---
expr.c
        - popexp: if we error out due to stack underflow, make sure to zero out
          expression and lasttp; they may contain undefined values we don't
          want evalerror to print
        - expr_unwind: handle expr_depth decrementing below zero
        - evalexp: restore the old value of evalbuf even if we error and
          longjmp; we may have called evalexp recursively
        - evalerror: make sure expression is non-NULL before trying to print it.
          These fix fuzzing bug reported by Eduardo Bustamante
          <dualbus@gmail.com>, happens only in cases where we don't longjmp on
          a fatal expansion error

                                    5/5
                                    ---
parse.y
        - read_token_word: when checking for a word that's a target of a
          redirection, we can potentially call valid_array_reference, which
          can end up calling the parser recursively. If it does that, we
          need to make sure that yylval.word doesn't change, so we set it back
          to the_word. Fixes another fuzzing bug

parse.y
        - arith_for_command: make syntax errors in the arithmetic for command
          (signaled by make_arith_for_command returning NULL) more like
          language syntax errors by calling YYERROR. Avoids complicated
          attempts at error recovery and dealing with NULL returns from
          command productions. Pointed out by Eduardo Bustamante
          <dualbus@gmail.com>

lib/readline/kill.c
        - _rl_copy_to_kill_ring: make sure the current slot in the kill ring
          has something in it, even if the last command was a kill, before
          trying to modify it. Another fuzzing bug

                                    5/6
                                    ---
builtins/read.def
        - read_builtin: if we see a backslash when not in raw mode (not -r),
          only back up `i' when we read the next character if we know we added
          a CTLESC the last time through the loop (skip_ctlesc == 0),
          especially if i == 0. Another fuzzing bug from Eduardo Bustamante
          <dualbus@gmail.com>

                                    5/8
                                    ---
builtins/read.def
        - read_mbchar: handle zreadn/zreadc/zread returning EOF in the middle
          of an incomplete multibyte sequence.  Fixes another fuzzing bug
        - read_builtin: use mb_cur_max instead of constant 4 when deciding
          whether the next character can exceed the number of bytes available
          in input_string

lib/readline/input.c
        - MinGW: include <conio.h> before <io.h>. Fix from Eli Zaretskii
          <eliz@gnu.org>

builtins/read.def
        - read_builtin: if we get input from readline, we need to get the
          remainder of a multibyte character from rlbuf instead of calling
          read_mbchar. Bug reported by Eduardo Bustamante <dualbus@gmail.com>

                                    5/9
                                    ---
parse.y
        - token_is_assignment: use the allocated buffer approach in all cases,
          not just if we're not using bush malloc. This avoids the assignment
          to t[i+1] writing beyond the end of the allocated token if
          i == token_buffer_size - 1. Another fuzzing bug
        - xparse_dolparen: if parse_string returns < 0, we clear out the
          current shell_input_line before performing a longjmp, since we're
          abandoning parsing of this command.  This is consistent with how
          the parser resynchronizes after other syntax errors
        - GRAMMAR: add 'error yacc_EOF' production to handle a syntax error
          that's immediately followed by an EOF after resynchronization.
          Fixes another fuzzing bug

                                   5/10
                                   ----
lib/readline/text.c
        - _rl_set_mark_at_pos: don't let the mark be set to a position < 0.
          Fixes a fuzzing bug
        - rl_exchange_point_and_mark: don't do anything if the mark is already
          less than 0

                                   5/12
                                   ----
lib/readline/rlmbutil.h
        - wchar_t: make sure this is defined as int if multibyte characters
          aren't supported

lib/readline/text.c
        - _rl_change_case: don't force use of ascii toupper and tolower if
          isascii returns true; it's not defined to work on characters outside
          the 0..255 (really 0..127) range.  Bug reported by
          Eduardo Bustamante <dualbus@gmail.com>

                                   5/14
                                   ----
lib/readline/text.c
        - rl_change_case: handle case where the old and new characters (after
          the case change) are not the same number of bytes. Pointed out in
          http://lists.gnu.org/archive/html/bug-bush/2015-01/msg00091.html

lib/readline/display.c
        - expand_prompt: use `ret' as first parameter to _rl_find_prev_mbchar
          since that needs the base of the array. Bug from fuzzing reported by
          Eduardo Bustamante <dualbus@gmail.com>

                                   5/15
                                   ----
execute_cmd.c
        - execute_simple_command, execute_arith_command, execute_cond_command,
          execute_arith_for_command: adjust the line number when executing a
          function interactively so that the first command in the function is
          line 1, not line 0, as Posix requires.  Reported by Robert Elz
          <kre@bmunnari.OZ.AU>
        - execute_simple_command, execute_arith_command, execute_cond_command,
          execute_arith_for_command: ony adjust the line number when executing
          a function interactively if we are not sourcing a file
          (sourcelevel == 0), so this is consistent everywhere we adjust the
          line number

                                   5/16
                                   ----
bushline.c
        - bush_directory_completion_hook: when calling split_at_delims to see
          whether a ${ or $( is closed, use the right value for `start' relative
          to the substring beginning at `$'.  Bug from fuzzing reported by
          Eduardo Bustamante <dualbus@gmail.com>

expr.c
        - expassign: if the call to expcond generates a syntax error in a
          context when the shell won't longjmp (like when evaluating $PS1),
          it will end up NULL and we need to catch it before calling strlen.
          Bug from fuzzing reported by Eduardo Bustamante <dualbus@gmail.com>

examples/bush-completion/
        - new place to include a current or recent version of the
          bush-completion package

                                   5/19
                                   ----
lib/readline/display.c
        - CHECK_INV_LBREAKS: new versions for multibyte and single-byte chars,
          so the multibyte version can check and increase the size of
          line_state_invisible->wbsize and line_state_invisible->wrapped_line,
          callers who call CHECK_INV_LBREAKS must update
          wrapped_line[newlines] when in HANDLE_MULTIBYTE mode. Fuzzing bug
          reported by Eduardo Bustamante <dualbus@gmail.com>

                                   5/24
                                   ----
lib/readline/search.c
        - _rl_nsearch_callback,noninc_search: handle _rl_search_getchar
          returning -1 (EOF or read error) by aborting the search.
          Fuzzing bug reported by Eduardo Bustamante <dualbus@gmail.com>

                                   5/25
                                   ----
variables.c
        - localvar_inherit: new variable, controlled by shopt localvar_inherit
          option
        - make_local_variable: if localvar_inherit is set, the new local
          variable inherits a previous scope's variable's value, attributes
          (except nameref), and dynamic variable information. If a local
          variable inherits a value, the local is not invisible

builtins/shopt.def
        - localvar_inherit: new option

doc/{bush.1,bushref.texi}
        - localvar_inherit: document new shopt option

                                   5/29
                                   ----
lib/readline/readline.c
        - _rl_subseq_result: only return -1 and back up the chain if we are
          dealing with a result (r) that's already < 0 and we are at the end
          of a multi-key sequence. Otherwise, a failing readline command (e.g.,
          delete-char at the end of a line) could cause this code to be
          executed.  Report from Nuzhna Pomoshch <nuzhna_pomoshch@yahoo.com>

lib/readline/histfile.c
        - read_history_range: if the file isn't a regular file, return an
          error. Bug report from Eduardo Bustamante <dualbus@gmail.com>,
          relaying from IRC

                                   5/30
                                   ----
variables.c
        - set_pwd: if in Posix mode, and PWD appears in initial environment as
          an absolute pathname to the current directory, set PWD to the result
          of canonicalizing the environment value, or to the physical path if
          canonicalization fails. From a suggestion by Eduardo Bustamante
          <dualbus@gmail.com>

                                   5/31
                                   ----
builtins/read.def
        - read_builtin: if -n or -N option is supplied with a 0 argument,
          don't attempt to read any characters; bail out right away. Reported
          by Eduardo Bustamante <dualbus@gmail.com>, relaying from IRC

                                    6/3
                                    ---
config.h.in
        - HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC: add define, used by stat-time.h
          to construct a timespec from struct stat. Report and fix from
          Siteshwar Vashisht <svashisht@redhat.com>

variables.h
        - att_regenerate: new internal variable attribute: if set, regenerate
          dynamic variable's value when it's exported and we are creating the
          export environment

variables.c
        - init_dynamic_variables: LINENO, EPOCHSECONDS, EPOCHREALTIME: set
          internal regenerate attribute for these dynamic variables
        - make_env_array_from_var_list: if a dynamic variable has the
          regenerate attribute set, call the dynamic value function to generate
          an updated value before placing it in the environment.  From a report
          about exporting LINENO from Robert Elz <kre@bmunnari.OZ.AU>

                                    6/4
                                    ---
lib/glob/sm_loop.c
        - BRACKMATCH: at the matched: label, make sure we get the bracket
          character we're looking for (char class, collating symbol. etc.)
          before we decrement the count of braces we're looking for. Eventually
          we could do something about badly-formed bracket expressions

                                    6/7
                                    ---
lib/readline/histlib.h
        - strchr: only declare if  __STDC__ is not defined, since we already
          include <string.h>.  Report from Chi-Hsuan Yen <yan12125@gmail.com>

                                    6/9
                                    ---
lib/readline/display.c
        - update_line: when wrapping lines with multibyte chars at the end of
          the new line being wrapped, make sure we copy the NULL byte in old
          when moving the contents of old around. Fuzzing bug reported by
          Eduardo Bustamante <dualbus@gmail.com>

lib/readline/mbutil.c
        - _rl_get_char_len: use MB_CUR_MAX in the call to mbrlen; there's no
          need to look at the rest of the string when we're just interested in
          the length of a single character

                                   6/12
                                   ----
jobs.c
        - wait_for: when waiting for the next child to exit (ANY_PID), make
          sure to restore the old SIGINT handler before returning.  Fixes
          https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=864649

                                   6/14
                                   ----
lib/readline/display.c
        - expand_prompt: make sure `ret' is NULL-terminated before calling
          _rl_prev_mbchar_internal, since that calls strlen, which requires
          the passed string to be NULL-terminated. Another fuzzing bug.

                                   6/15
                                   ----
lib/readline/isearch.c
        - _rl_isearch_fini: use rl_replace_line instead of strcpy so rl_end
          gets set right
        - _rl_isearch_fini: after restoring rl_point, call _rl_fix_point so
          we don't set rl_point > rl_end. Fixes a fuzzing bug

lib/readline/mbutil.c
        - _rl_find_next_mbchar_internal: if _rl_adjust_point returns < 0,
          just punt, treat the value as a byte, and advance point by 1

lib/readline/util.c
        - rl_tilde_expand: rearrange code in the whitespace loop so that
          `start' gets tested first and we don't try to dereference
          rl_line_buffer[-1]. Another fuzzing bug from dualbus@gmail.com

bushline.c
        - bush_dequote_filename: make sure that pointers that are used as
          indices into sh_syntaxtab are cast to unsigned char first, to
          avoid problems with signed chars > 128. Fixes a fuzzing bug.

lib/readline/kill.c
        - _rl_copy_to_kill_ring: when reallocating the kill ring, make sure to
          allocate one more than the max number of kills so the loop that
          copies the kill ring entries down runs right (and to mirror the
          initial allocation). Fixes a fuzzing bug.

lib/readline/isearch.c
        - _rl_isearch_dispatch: make sure that cxt->sline_index never goes < 0
          even when searching a line in reverse. Fixes a fuzzing bug

                                   6/16
                                   ----
parse.y
        - xparse_dolparen: short-circuit immediately if passed a empty string

lib/readline/display.c
        - update_line: when wrapping multibyte characters, make sure we deal
          with WCWIDTH returning -1. Fixes a fuzzing bug

                                   6/17
                                   ----
execute_cmd.c
        - execute_coproc: make sure `invert' is set before trying to use it
          when returning failure on invalid coproc name.  Report and fix from
          Eduardo Bustamante <dualbus@gmail.com>
        - execute_command_internal: make sure execute_coproc sets
          last_command_exit_value if it returns failure, so an invalid name
          can set $? = 1.  Report and fix from Eduardo Bustamante
          <dualbus@gmail.com>

lib/readline/display.c
        - update_line: make sure all references to `wrapped_line' are wrapped
          with #ifdef HANDLE_MULTIBYTE.  Report and fix from Eduardo Bustamante
          <dualbus@gmail.com>

lib/readline/vi_mode.c
        - _rl_vi_change_char: don't use rl_point++ when you mean to move
          forward a character; use _rl_vi_append_forward to account for
          multibyte characters and take vi end of line handling into account
        - _rl_vi_last_replacement: now an array of chars whether we are
          using multibyte chars or not. If we're not, the character we read
          to use as the replacement is saved as the first element of the array
        - rl_vi_change_char,_rl_vi_callback_change_char: changes to deal with
          _rl_vi_last_replacement being an array.  Fixes bug reported by
          Eduardo Bustamante <dualbus@gmail.com>

lib/readline/mbutil.c
        - _rl_get_char_len: look at at most MB_CUR_MAX characters, but maybe
          fewer if the length of the string is less

builtins/bind.def
        - unbind_keyseq: new function for the -r option; checks whether the
          key sequence is actually bound before trying to bind it to NULL.
          Partial fix for https://savannah.gnu.org/support/?109329

parse.y
        - augment `error yacc_EOF' production to call YYABORT in non-interactive
          shells or calls to parse_and_execute (eval, command substitution,
          etc.) Fixes bug reported by Martijn Dekker <martijn@inlv.org>

                                   6/19
                                   ----
bushline.c
        - edit_and_execute_command: don't add rl_line_buffer to the history
          list if it's empty; consistent with how other code treats an empty
          line

execute_cmd.c
        - execute_builtin: make sure to preserve the temporary env across the
          execution of the `read' builtin or `fc' builtin if HISTORY is
          defined, in case `read -e' calls edit-and-execute-command.  Should
          have no side effects. Reported by Eduardo Bustamante
          <dualbus@gmail.com>

general.c
        - line_isblank: new function: returns true if passed string is composed
          entirely of blanks

general.h
        - line_isblank: new extern declaration

parse.y
        - history_delimiting_chars: return "" for a blank line, since there's
          nothing to delimit with `;'

                                   6/21
                                   ----
jobs.c
        - wait_for: make sure to call restore_sigint_handler before returning
          if we return out of the loop due to no children. Report from
          Eduardo Bustamante <dualbus@gmail.com>

subst.c
        - expand_word_internal: if split_on_spaces is set, and the word is
          unquoted, and IFS is null, split the results of the previous steps
          on $' \t\n' instead of just ' '. This relies on the previous steps
          quoting the portions of the word that should not be split.  Fixes
          bug reported by Kevin Brodsky <corax26@gmail.com>

expr.c
        - evalexp: after running expr_unwind, make sure we reset expr_depth
          to 0 for the next call
        - expr_streval: if after a call to get_array_value (which can call
          the expression evaluator recursively) we discover that expr_depth
          is less than it was before we called it, we assume there has been
          some kind of error and an expr_unwind, so we treat it as an
          error and either longjmp back to the expression top level or return
          0 immediately. Fixes bug reported by Eduardo Bustamante
          <dualbus@gmail.com>

                                   6/23
                                   ----
doc/{bush.1,bushref.texi}
        - add text noting that $* and ${array[*]} (unquoted) can also expand
          to multiple words

                                   6/29
                                   ----
general.[ch]
        - default_columns: new function, returns the value of COLUMNS, or
          refreshes it if check_window_size is set and COLUMNS is unset. By
          default, it returns 80

execute_cmd.c
        - select_query: use default_columns() instead of fetching value of
          COLUMNS directly

builtins/help.def
        - show_builtin_command_help: use default_columns() instead of fetching
          value of COLUMNS directly

                                   6/30
                                   ----
builtins/read.def
        - read_builtin: call QUIT during the read loop, just in case we get a
          signal we should act on that didn't cause read to be interrupted.
          Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1466737
        - read_builtin: if -n or -N is supplied with a 0 argument, try a zero-
          length read to detect errors and return failure if that read returns
          a value < 0. Suggested by dualbus@gmail.com

                                    7/4
                                    ---
bushhist.c
        - maybe_add_history: keep track of whether the current line is a shell
          comment, even if we're not adding it because it's in a multi-line
          command, so we use appropriate delimiters between it and any
          subsequent lines. Fixes bug reported by Grisha Levit
          <grishalevit@gmail.com> back on 2/28/2017

bushline.c
        - operate_and_get_next: if given an explicit argument, use that to
          choose which line in the history to use.

lib/readline/doc/rluser.texi,doc/bush.1
        - operate-and-get-next: document new effect of explicit numeric arg

lib/readline/complete.c
        - fnprint: make sure print_len is initialized before using it on
          systems without multibyte character support.  Report and fix from
          Juan Manuel Guerrero <juan.guerrero@gmx.de>

                                    7/6
                                    ---
builtins/printf.def
        - PRETURN,printf_builtin: check variable returned by bind_printf_variable,
          return failure if that indicates we can't perform an assignment
          because the variable is marked readonly or noassign. Fixes bug
          reported by Arnaud Gaillard <arnaud.mgaillard@gmail.com>

                                    7/7
                                    ---
lib/readline/text.c
        - rl_quoted_insert: new feature: a negative argument means to insert
          the next -COUNT characters using quoted-insert. Original feature
          from Jason Hood <jadoxa@yahoo.com.au>. Still needs work on
          redisplay
        - _rl_insert_next_callback: implement support for negative arguments
          similar to rl_quoted_insert: we just insert one at a time and keep
          increasing the count until it hits 0

lib/readline/misc.c
        - _rl_arg_callback: if the return value from _rl_arg_dispatch indicates
          we should keep reading a numeric argument, update the message with
          the new arg value

                                    7/8
                                    ---
lib/readline/signals.c
        - _rl_handle_signal: make sure all uses of any of the job control
          signals are protected by a check for SIGTSTP being defined.  Report
          from Juan Manuel Guerrero <juan.guerrero@gmx.de>

                                   7/11
                                   ----
lib/readline/vi_mode.c
        - rl_vi_replace: when making the new keymap for vi replacement mode,
          make sure that ANYOTHERKEY is set correctly, otherwise some input
          will cause _rl_dispatch to return -2 to the top level.  Fixes fuzzing
          bug reported by Ben Wong <benjamin.a.wong@gmail.com>

                                   7/19
                                   ----
builtins/read.def
        - struct ttsave: make the attrs member a struct, not a pointer, to force
          a structure copy that will survive a longjmp to another context.
          Leaving it as a pointer to a local struct is not portable

                                   9/10
                                   ----
execute_cmd.c
        - execute_builtin: make sure that we set up the unwind-protect for
          pop_scope (temporary_env is non-zero) so that the temporary env
          is propagated to the current environment only for special builtins
          (source/eval/unset) not run by the command builtin
          (flags & CMD_COMMAND_BUILTIN == 0).  Fixes bug reported by
          Martijn Dekker <martijn@inlv.org>

                                   9/17
                                   ----
builtins/printf.def
        - asciicode: don't use mblen to check whether or not a character is a
          valid multibyte character; use mbtowc right away and then inspect
          the return value.  Fixes bug reported by Stephane Chazelas
          <stephane.chazelas@gmail.com>

                                   9/27
                                   ----
{jobs,subst}.h
        - move declaration of last_command_subst_pid to subst.h, since it's
          declared in subst.c and doesn't depend on job control. Reported by
          Martijn Dekker <martijn@inlv.org>

builtins/read.def,variables.c
        - fixed a couple of problems (READLINE, ARRAY_VARS) that prevented
          the minimal config from building

                                   10/1
                                   ----
parse.y
        - special_case_tokens: if we are returning DO in a case where the last
          two tokens read are `FOR' and `WORD' make sure we decrement
          expecting_in_token.  Fixes bug reported by Martijn Dekker
          <martijn@inlv.org>

                                   10/4
                                   ----
subst.c
        - expand_string_for_rhs: now takes an additional PFLAGS argument from
          its caller (one so far); passes that through to call_expand_word_internal
          as W_ASSIGNRHS. Fixes bug reported by Martijn Dekker
          <martijn@inlv.org>
        - expand_string_for_rhs: expanding b in ${a[:]=b} is now done as if
          b were the rhs of an assignment statement. This means that splitting
          isn't done, but tilde expansion is performed as if the statement
          were `a=b'. Fixes splitting bug with $* reported by Martijn Dekker
          <martijn@inlv.org>

command.h
        - W_NOASSNTILDE: new word flag, means to not perform tilde expansion
          following a `:' even if the word has the W_ASSIGNRHS flag enabled

subst.c
        - expand_word_internal: if we see a `:' with the W_NOASSNTILDE flag
          set, just add the character and inhibit any subsequent tilde
          expansion. Currently not set anywhere, but it could be set in
          expand_string_for_rhs to satisfy its peculiar semantics

                                   10/6
                                   ----
lib/sh/casemod.c
        - sh_modcase: convert even single-byte wide characters to wide upper
          or lowercase equivalents to accommodate locales where single-byte
          characters have multibyte upper and lower case conversions. Bug
          reported by Stephane Chazelas <stephane.chazelas@gmail.com>

                                   10/7
                                   ----
doc/{bush.1,bushref.texi}
        - slight changes to the description of command_not_found_handle to
          clarify that it's executed in a separate execution environment,
          just like if the command was found. Reported by Martijn Dekker
          <martijn@inlv.org>

                                   10/8
                                   ----
lib/readline/doc/{history.3,hstech.texi}
        - history_get: clarify the range of valid values for the OFFSET
          argument. From a report by Kevin Ryde <user42_kevin@yahoo.com.au>

                                   10/21
                                   -----
subst.c
        - expand_string_for_rhs: set W_NOASSNTILDE if the operator is `='
          for backwards compatibility with bush-4.4

shell.c
        - main: set positional parameters before running the startup files,
          so the startup files can inspect $@.  Often-requested feature,
          most recently from Stephane Chazelas <stephane.chazelas@gmail.com>

                                   10/27
                                   -----
doc/{bush.1,bushref.texi}
        - Arrays: add some clarifying language to make it clear that array
          references that don't use the ${a[s]} syntax are subject to
          globbing when passed as arguments to commands such as unset, and
          should be quoted for safety. Change prompted by a report from
          Eli Barzilay <eli@barzilay.org>

parse.y
        - parse_comsub: make sure we don't run off the end of the `ret'
          buffer when checking for the here doc delimiter.  Report from
          Jakub Wilk <jwilk@jwilk.net>, the result of a fuzzing test. Pointer
          to place for the fix from Eduardo Bustamante <dualbus@gmail.com>

                                   10/30
                                   -----
builtins/pushd.def
        - get_directory_stack: make sure the current directory (element 0 of
          the stack) is passed to polite_directory_format under the same
          conditions as the rest of the stack entries (flags & 1). Otherwise
          something like `cd ${DIRSTACK[0]}' will fail. Fixes bug reported
          by Steve Jones <sjml@slohj.org>

builtins/declare.def
        - declare_internal: when checking for a `[' to see whether or not this
          is an array variable declaration (declare -a foo[12]), make sure
          we don't do the check if we're just dealing with shell functions.
          Bug and pointer to fix from PJ Eby <pje@telecommunity.com>

                                   11/1
                                   ----
parse.y
        - parse_comsub: if we read a four-character word followed by a break
          character, and that word is not one of the reserved words, set
          lex_rwlen to 0 since we are no longer in a reserved word. It only
          hurts if another break character immediately follows, so that test
          succeeds again. Turn off the RESWDOK flag only if it's not a shell
          metacharacter, too. Fixes bug reported by Kjetil Torgrim Homme
          <kjetilho@scribus.ms.redpill-linpro.com>

                                   11/3
                                   ----
lib/readline/isearch.c
        - _rl_isearch_dispatch: if we are searching in reverse order, let
          sline_index go to -1 to avoid searching the same line twice. It
          gets reset right after that, so there's no danger of indexing into
          the history line with a negative index.

                                   11/7
                                   ----
execute_cmd.c
        - time_command: only restore command->flags if CODE indicates we didn't
          perform a longjmp back to top_level. If we did, `command' has already
          been freed. Fixes bug reported on savannah by 
          ukuvbu oibws <xyzdr4gon333@googlemail.com>
          https://savannah.gnu.org/support/?109403

                                   11/10
                                   -----
lib/sh/unicode.c
        - u32cconv: make sure to initialize localconv to -1 (error) in case
          we switch from a utf-8 locale to something else and call
          iconv_close. Report from Egmont Koblinger <egmont@gmail.com>; fix
          from Eduardo Bustamante <dualbus@gmail.com>

                                   11/16
                                   -----
subst.c
        - parse_comsub: istring_index should be a size_t to avoid integer
          overflow when allocating large pieces of memory. Report and fix
          from Siteshwar Vashisht <svashisht@redhat.com>, originally based on
          http://lists.gnu.org/archive/html/bug-bush/2017-11/msg00047.html

                                   11/24
                                   -----
lib/readline/bind.c
        - rl_empty_keymap: new public function, returns non-zero if there are
          no keys bound in the keymap passed as an argument

lib/readline/readline.h
        - rl_empty_keymap: new public extern declaration

lib/readline/doc/rltech.texi
        - rl_empty_keymap: document new function

lib/readline/bind.c
        - rl_generic_bind: keep track of the previous keymap and previous
          index in a multi-key key sequence so we can remove an empty terminal
          keymap and remove a previous override to ANYOTHERKEY. Right now,
          this only works for one previous keymap level. Inspired by a report
          from Clark Wang <dearvoid@gmail.com>

                                   11/25
                                   -----
lib/readline/display.c
        - _rl_update_final: make sure that computing the length of the visible
          bottom line (botline_length) takes any invisible characters in the
          prompt into account (woff). This value is used as part of the check
          whether or not we want to remove the line-wrapping indicator on
          terminals like xterm
        - _rl_update_final: when removing the line-wrapping indicator on xterm,
          make sure we take invisible characters in the prompt (woff) into
          account when computing the character in the rightmost physical
          screen position. Fixes cosmetic line-wrapping issue reported by
          Egmont Koblinger <egmont@gmail.com>

                                   11/27
                                   -----
lib/sh/ufuncs.c
        - fsleep: if using select to implement sleep, use restart after
          a signal interrupts the select and handle pending signals. If
          pselect is available, use that instead and block SIGCHLD while
          pselect is executing.
          Fixes report from Thiruvadi Rajaraman <trajaraman@mvista.com>

                                   11/28
                                   -----
lib/readline/signals.c
        - rl_check_signals: new public function: a wrapper for RL_CHECK_SIGNALS
          that can be used by applications that install a wrapper for
          rl_getc (rl_getc_function) so they can respond to signals that
          arrive while waiting for input in the same way as rl_getc. The app
          can use rl_pending_signal() to get the most recently-received
          signal. From a discussion about Gnuplot initiated by
          Rin Okuyama <rokuyama@rk.phys.keio.ac.jp>

lib/readline/readline.h
        - rl_check_signals: new extern declaration

lib/readline/doc/rltech.texi
        - rl_check_signals: document new public function

variables.c
        - set_pwd: test for and force an inherited OLDPWD to be a directory
          if OLDPWD_CHECK_DIRECTORY is defined in config-top.h (it is by
          default). Issue raised by Mikulas Patocka <mikulas@twibright.com>

config-top.h
        - OLDPWD_CHECK_DIRECTORY: new define, defined to 1 by default

                                   11/29
                                   -----
Makefile.in
        - pathexp.o: add dependencies on libintl.h.  Reported by
          Ross Burton <ross@burtonini.com>

                                   12/1
                                   ----
lib/sh/ufuncs.c
        - fsleep: add blocking and releasing SIGCHLD using sigprocmask
          around call to select(2) even if pselect(2) is not available

                                   12/3
                                   ----
execute_cmd.c
        - coproc_setstatus: new utility function, take a pointer to a coproc
          and a status and mark the coproc as dead and having been reaped
          with that status. Used by child processes who want to invalidate
          the coproc's pid

                                   12/5
                                   ----
subst.c
        - process_substitute: instead of just having a flag to denote that a
          file descriptor is connected to a process substitution, store the
          pid of the child process (still needs work)
        - find_procsub_child,set_procsub_status,reap_procsubs: utility
          functions to allow the job control code to detect that a process
          substitution child has died and deallocate the file descriptors
          or pathname

subst.h
        - find_procsub_child,set_procsub_status,reap_procsubs: extern
          declarations

nojobs.c
        - set_pid_status: if we are reaping a process substitution, call
          set_procsub_status to record the fact

jobs.c
        - waitchld: if we are reaping a process substitution, call
          set_procsub_status to record the fact. Doesn't really do anything
          yet

                                   12/6
                                   ----
execute_cmd.c
        - execute_command: don't call unlink_fifo_list if we're in the
          middle of executing a list of commands (executing_list != 0).
          Partial fix for bug reported by Stephane Chazelas
          <stephane.chazelas@gmail.com>
        - execute_simple_command: don't close process substitution file
          descriptors in the parent after forking children in a pipeline;
          defer until pipeline completes, since parent may have inherited
          fds from a calling scope (e.g., via `.'). EXPERIMENTAL
        - execute_disk_command: don't close process substitution file
          descriptors in the parent after forking the child. EXPERIMENTAL

                                   12/7
                                   ----
doc/bush.1,lib/readline/doc/{readline.3,rluser.texi}
        - show-mode-in-prompt: clarify that this must be enabled before the
          vi and emacs mode strings are prefixed to the prompt.  Report from
          Rob Foehl <rwf@loonybin.net>

                                   12/8
                                   ----
execute_cmd.c
        - execute_coproc: don't warn about an existing coproc if the write and
          read file descriptors are unusable (-1), as they will be after a
          call to coproc_closeall in a subshell. Fixes spurious warning
          reported by Tobias Hoffmann <lfile-list@thax.hardliners.org>

jobs.c
        - bgp_resize: avoid overflow when calculating the new size if the
          child process limit is something ridiculously large. Report and
          fix from Natanael Copa <ncopa@alpinelinux.org>

execute_cmd.c
        - execute_builtin_or_function: if we return via the return builtin, we
          don't get a chance to free the saved fifo list, so add an unwind-
          protect to make sure it happens. Part of fix for leak reported by
          Oyvind Hvidsten <oyvind.hvidsten@dhampir.no>
        - execute_command_internal: if we unwind via the return builtin (e.g.,
          we execute a function which then returns via the return builtin to
          a previous function), we don't free the saved fifo list, so add an
          unwind-protect to make sure the free happens. Rest of fix for leak
          reported by Oyvind Hvidsten <oyvind.hvidsten@dhampir.no>

subst.c
        - add_fifo_list: for the FIFO case (no /dev/fd), make sure we
          initialize the new members of the fifo list after xrealloc

                                   12/9
                                   ----
subst.c
        - dev_fd_list: now a list of type `pid_t' so we can store process
          associated with the pipe fd into the right element; change all
          necessary functions (copy_fifo_list, add_fifo_list)
        - process_substitute: store pid of child process into the right
          index in dev_fd_list after opening the pipe. Process ID of -1 means
          process has been reaped and fd needs to be closed (or FIFO needs to
          be unlinked); value of 0 means slot is unused

jobs.c
        - wait_for_background_pids: call reap_procsubs to make sure we clean
          up all reaped process substitutions before trying to wait for
          everything (still needs work)

tests/{run-procsub,procsub.{tests,right}}
        - new file, tests of process substitution that have failed in the past

                                   12/10
                                   -----
jobs.c
        - wait_for_background_pids: warn if one of the jobs is stopped

subst.c
        - wait_procsubs: new function, call wait_for for every "live" process
          substitution

jobs.c
        - wait_for_background_pids: call wait_procsubs to reap any living
          process subsitutions

                                   12/13
                                   -----
lib/readline/bind.c
        - parser_if: add support for testing the readline version, using the
          full set of arithmetic comparison operators (and supporting both
          = and ==), using version numbers of the form major[.[minor]]

                                   12/14
                                   -----
subst.[ch]
        - string_list_dollar_star: now takes QUOTED and PFLAGS arguments like
          string_list_dollar_at, changed all callers. Not used yet.

                                   12/16
                                   -----
subst.c
        - param_expand: broke out cases of expanding unquoted (quoted == 0)
          $* on the rhs of an assignment statement (pflags & PF_ASSIGNRHS)
          with various values of IFS (unset, null, set to non-null value) to
          capture the expansion subtleties. From a report back on 11/24 by
          Martijn Dekker <martijn@inlv.org>

                                   12/17
                                   -----
array.h
        - set_element_value: new define, sets array element AE to VALUE

variables.c
        - set_pipestatus_array: use set_element_value where appropriate

                                   12/18
                                   -----
subst.c
        - parameter_brace_find_indir: when expanding the indirect parameter
          to find the eventual variable name, we don't perform word splitting.
          Make sure this does the right thing for * and @.  Fixes bug
          reported by isabella parakiss <izaberina@gmail.com>

                                   12/19
                                   -----
doc/{bush.1,bushref.texi}
        - indirect expansion: make sure to note that the value of the indirect
          variable does not undergo word splitting as one of its expansions,
          as in fix from 12/18

                                   12/22
                                   -----
subst.c
        - parameter_brace_expand_rhs: make sure the value this function returns
          when OP is `=' is quoted appropriately, as the callers expect. More
          changes from Posix interp 221. Fixes report from Martijn Dekker
          <martijn@inlv.org>

variables.c
        - assign_hashcmd: if running in a restricted shell, make sure the
          target of the hash assignment can be found via a $PATH search, to
          prevent users assigning commands to the hash table they would not
          ordinarily have access to. Fixes issue raised by Drew Parker
          <andrew.s.parker2@gmail.com>

builtins/hash.def
        - hash_builtin: if running in a restricted shell, make sure the
          pathname target of `hash -p' can be found via a $PATH search, to
          prevent users assigning commands to the hash table they would not
          ordinarily have access to.

                                   12/27
                                   -----
array.c,arrayfunc.c,...
        - many changes to clean up unused variables and functions. From a
          report from Siteshwar Vashisht <svashisht@redhat.com>

                                   12/28
                                   -----
lib/readline/terminal.c
        - _rl_term_clrscroll: save the `E3' termcap capability, which clears
          the scrollback buffer where supported. Unused right now

lib/readline/rlprivate.h
        - _rl_term_clrscroll: extern declaration

lib/readline/bind.c
        - parser_if: added simple variable comparison capability. Allowable
          operators are `=', `==', and `!='; boolean variables must be
          compared to either `on' or `off'; variable names must be separated
          from the operator by whitespace

doc/bush.1,lib/readline/doc/{rluser.texi,readline.3}
        - document new `if variable comparison value' construct

                                 1/2/2018
                                 --------
lib/glob/sm_loop.c
        - EXTMATCH: when matching against !(patlist), if a filename beginning
          with a `.' does not match any of the patterns in patlist, don't
          return it as a match if leading dots need to be matched explicitly
          (flags & FNM_PERIOD). Report from Eric Cook <llua@gmx.com>

                                    1/3
                                    ---
variables.[ch]
        - bind_function_def: takes an additional flags argument. If FLAGS&1,
          overwrite any existing function_def hash table entry; if FLAGS==0,
          leave any existing function_def alone.

make_cmd.c
        - make_function_def: call bind_function_def with flags == 0

execute_cmd.c
        - execute_intern_function: call bind_function_def with flags == 1 so
          we have function_def information that's correct for where the
          function is defined, not just where it's last parsed. Fixes report
          from Bruno Vasselle <bruno.vasselle@laposte.net>; final piece of
          fix from 12/15/2011

                                    1/4
                                    ---
subst.c
        - param_expand: deal with string_list_dollar_star returning NULL.
          Fixes bug reported by Martijn Dekker <martijn@inlv.org>

builtins/history.def
        - history_builtin: enabled code that performs range deletion

                                    1/5
                                    ---
subst.c
        - do_assignment_internal: if performing a compound assignment, make
          sure to pass ASS_CHKLOCAL flag to do_compound_assignment if the
          assignment word has the W_CHKLOCAL flag set
        - do_compound_assignment: honor ASS_CHKLOCAL flag and check for an
          existing local variable before creating or modifying a global
          variable

builtins/declare.def
        - declare_internal: new (undocumented so far) option: -G. Means to
          act on global variables (create, modify) if no local variable is
          found with the specified name
        - declare_find_variable: new declare-specific wrapper functon for
          declare builtin; obeys -g and -G options in one place
        - declare_internal: if no variable is found after following any nameref
          chain, look up the variable using declare_find_variable to honor the
          -G option. XXX - so far, this is the only place that function is used

subst.c
        - shell_expand_word_list: before calling make_internal_declare, add
          'G' to the options list if W_CHKLOCAL is set in the word's flags.
          This makes builtins like `readonly' that modify local variables in
          a function behave the same for scalar and array variables

                                   1/11
                                   ----
parse.y
        - shell_getc: move code that decides whether to append a space to an
          alias expansion here from mk_alexpansion, so we can inhibit adding
          a space if we're currently parsing a single or double quoted string

                                   1/12
                                   ----

parse.y
        - clear_string_list_expander: take a pointer to an alias that's about
          to be freed and make sure there aren't any pointers to it in the
          list of pushed strings. If there are, zero it out in the pushed
          string list to avoid referencing freed memory in pop_string()

alias.c
        - free_alias_data: if an alias being freed is currently being expanded,
          call clear_string_list_expander to remove references to it from the
          list of pushed strings

                                   1/14
                                   ----
pcomplib.c
        - progcomp_search: add code to look up an alias for the CMD argument
          and return the completions for the first word of that alias if one
          is found. Just a start at completing aliases, a much-requested
          feature

pcomplete.h
        - COPT_LASTUSER: last flag value used by user-settable completion
          options
        - PCOMP_RETRYFAIL, PCOMP_NOTFOUND: new #defines, possible return values
          from programmable_completions in FOUNDP argument. Moved RETRYFAIL
          define here from pcomplete.c to avoid collisions with user-settable
          option values (COPT_*)

                                   1/15
                                   ----
pcomplete.c
        - programmable_completions: if we don't find any completions for a
          command, and RETRY is 0, see if the command is a defined alias,
          expand it, and try to expand the first word of the value as a
          command, and find any programmable completions for it. Here right
          now, could be moved to attempt_shell_completion later if we need
          to do more analysis of the expanded line. We'll see how it works
          in practice. (Disabled for now.)

                                   1/16
                                   ----
parse.y
        - grammar: when timing the null command, make sure to turn off the
          flags in parser_state (PST_REDIRLIST) that make_simple_command sets
          when given a NULL second argument, since it assumes that it's going
          to turn those off when it gets the next word of the simple command
          (which it never gets in this case).  Fixes bug reported by
          Anti Räis <antirais@gmail.com>

                                   1/19
                                   ----
lib/readline/rltty.c
        - prepare_terminal_settings (termios/termio): if there is a function
          bound to the VDISCARD character in the current keymap, set VDISCARD
          to _POSIX_VDISABLE while readline is active. From a report from
          Rhialto <rhialto@falu.nl>

                                   1/22
                                   ----
builtins/history.def
        - histtime: check whether or not localtime() returns NULL, and make
          sure we only call strftime() with a valid struct tm. This can happen
          when the timestamps in the history file overflow a time_t. Fixes bug
          reported by Luke Dashjr <luke@dashjr.org>

bushline.c
        - edit_and_execute_command: if we're in vi editing mode, make sure
          we end up in insert mode after executing the commands from the
          edited file. This seems to be what other shells do. Report from
          Stan Marsh <gazelle@xmission.com>

                                   1/26
                                   ----
bushline.c
        - command_word_completion_function: match alias and shell function
          names case-insensitively if the readline completion-ignore-case
          variable is set. Inspired by report from <odnehel@gmail.com>

lib/readline/display.c
        - update_line: when performing a dumb update after wrapping the line
          (usually due to printing the prompt), make sure we adjust
          _rl_last_c_pos if there are invisible characters in prompt lines
          other than the first (we assume those invisible characters are in
          the last line, which is nearly always the case). We adjust by the
          total number of invisible chars less the number of invisible chars
          in the first prompt line. From a report in
          https://bugs.launchpad.net/ubuntu/+source/bush/+bug/1745273

execute_cmd.c
        - execute_command_internal: if redirections attached to a compound
          command fail, make sure we discard the `internal_fifos' unwind-
          protect frame after freeing the copied fifo_list and before returning

                                   1/30
                                   ----
lib/readline/rlprivate.h
        - BRACK_PASTE_FINI: add \r to the end of the string to avoid problems
          with the tty driver thinking the cursor was in the wrong position.
          Fixes issue reported by Egmont Koblinger <egmont@gmail.com>

                                   1/31
                                   ----
lib/sh/zread.c
        - zread,zreadintr: call check_signals() before calling read() to
          minimize the race window between signal delivery, signal handling,
          and a blocking read(2). Partial fix for FIFO read issue reported by
          Oyvind Hvidsten <oyvind.hvidsten@dhampir.no>

doc/{bush.1,bushref.texi}
        - shopt: document `assoc_expand_once' shell option

                                    2/1
                                    ---
config-top.h
        - DONT_REPORT_SIGTERM: define, so non-interactive shells will no
          longer print termination messages for child processes killed by
          SIGTERM

                                    2/6
                                    ---
lib/readline/text.c
        - rl_insert: don't attempt to optimize typeahead if we are only reading
          a fixed number of characters (rl_num_chars_to_read > 0)

redir.c
        - redir_special_open: if the shell is restricted, return a
          RESTRICTED_REDIRECT error for attempts to open /dev/tcp and /dev/udp
          sockets.  Inspired by report from Blake Burkhart <bburky@bburky.com>
        - do_redirection_internal: if redir_open returns RESTRICTED_REDIRECT,
          return that right away (instead of errno) so we can print a better
          error message

                                   2/11
                                   ----
jobs.c
        - bgp_resize: fix problems with (pid_t) overflow when calculating new
          size for table when js.c_childmax is near the limit of a pid_t
          (e.g., 2**31 - 1 on a 32-bit system, or 2**63-1 on a system with
          32-bit pid_t). Fixes hang reported by Natanael Copa
          <ncopa@alpinelinux.org> based on his patch from 12/8.
        - bgp_resize: cap max table size for bgpids at MAX_CHILD_MAX (32768)

include/typemax.h
        - TYPE_MINIMUM, TYPE_MAXIMUM: updated definitions from coreutils-8.29,
          silences some compiler warnings

                                   2/14
                                   ----
Makefile.in
        - maybe-clean: use cd and pwd -P to test whether or not two directory
          names identical, since topdir = '.' and BUILD_DIR = full pathname
          when you use something like `bush ./configure'. Problem reported by
          Michael Felt <aixtools@gmail.com>

subst.c
        - split_at_delims: if SD_NOQUOTEDELIM is in the flags argument, don't
          treat `'' and `"' as candidates for possible sequences of delimiters,
          even if they're part of the delimiter set (the delims argument).
          Fixes problem with completing lines like `foo --bar='quux baz' xx'
          reported by Nick Patavalis <npat@efault.net>

                                   2/15
                                   ----
copy_cmd.c
        - copy_word_list: build the list in the right order, avoiding having
          to reverse it at the end. Helps with long argument lists

shell.c
        - bind_args: build the argument list in the right order, avoiding
          having to reverse it at the end.
        - bind_args: only call push_args to save argc and argv as BUSH_ARGC
          and BUSH_ARGV if debugging mode is enabled (debugging_mode != 0).
          Inspired by report from Ambrose Feinstein <ambrose@google.com>
        - bind_args: note that we've saved BUSH_ARGC and BUSH_ARGV by setting
          bush_argv_initialized
        - shell_reinitialize: reset bush_argv_initialized back to 0 so
          BUSH_ARGV and BUSH_ARGC will be recreated if we're in debugging mode

variables.c
        - save_bush_argv: new function, initializes BUSH_ARGV and BUSH_ARGC
          from the saved positional parameters
        - init_bush_argv: initialize BUSH_ARGV and BUSH_ARGC if
          bush_argv_initialized == 0

builtins/shopt.def
        - shopt_set_debug_mode: if we're turning on debug mode, initialize
          BUSH_ARGC and BUSH_ARGV if bush_argv_initialized == 0

                                   2/16
                                   ----
execute_cmd.c
        - execute_function: make sure BUSH_ARGV and BUSH_ARGC are initialized
          before calling push_args (and before calling remember_args)

builtins/source.def
        - source_builtin: make sure BUSH_ARGV and BUSH_ARGC are initialized
          before calling push_args (and before calling remember_args)

builtins/evalfile.c
        - _evalfile: if the shell compatibility level is 44 or lower, make
          sure BUSH_ARGV and BUSH_ARGC are initialized before calling
          array_push

builtins/shopt.def
        - compat44: new shell option. This will be the last compatXX option

doc/{bush.1,bushref.texi}
        - compat44: document new shell option

                                   2/21
                                   ----
builtins/common.h
        - ISOPTION: check s[1] before s[2] to avoid out of bound reads. Fixes
          bug reported by jeremy@feusi.co

input.h
        - B_SHAREDBUF: new flag for buffered input fds, indicates that this
          fd shares its b_buffer with another fd

input.c
        - duplicate_buffered_stream: when duplicating *from* the buffer
          corresponding to bush input, make sure the new buffer has B_SHAREDBUF
          in the flags, because copy_buffered_stream copies pointers
        - duplicate_buffered_stream: if the buffer being copied to has the
          B_SHAREDBUF flag set, make sure the b_buffer doesn't get freed.
          Fixes use-after-free bug reported by jeremy@feusi.co
        - save_bush_input,close_buffered_stream: make sure a buffer with
          B_SHAREDBUF set has its b_buffer set to NULL before calling
          free_buffered_stream

                                   2/24
                                   ----
subst.c
        - parameter_brace_expand_error: add parameter saying whether or not
          we are checking whether value is null, so we can have different
          error messages for ${x:?} and ${x?}. Report and fix from
          don fong <dfong@dfong.com>

                                    3/5
                                    ---
lib/readline/bind.c
        - _rl_read_file: instead of calling stat/open on the passed filename,
          use open/fstat to avoid one possible filename translation and close
          a small (benign) race condition. Report and fix from Roy Ivy
          <roy.ivy.iii@gmail.com>

                                   3/11
                                   ----
variables.c
        - makunbound: if new variable localvar_unset is non-zero, mark local
          vars in previous scopes as invisible and unset so they will show
          up as unset until that previous scope returns (similar to how local
          variables in the current local scope are handled). localvar_unset
          is currently set to 0 with no way for a script to change its value.
          Eventually there will be an option to modify it.  From a bug-bush
          discussion started by Nikolai Kondrashov <spbnick@gmail.com> back
          on 2/11/2018

                                   3/13
                                   ----
subst.c
        - expand_word_list_internal: short-circuit and exit right away if a
          variable assignment preceding a special builtin fails in posix mode
        - expand_word_list_internal: if a variable assignment precedes an
          empty command name (after expansion), fix to exit right away when
          the shell is in posix mode

                                   3/15
                                   ----
doc/{bush.1,bushref.texi}
        - Add text to Pathname Expansion clarifying that a slash must be
          matched by a slash in the pattern when matching pathnames, but
          not in other matching contexts. Suggested by <stormy1777@yahoo.com>

builtins/common.c
        - read_octal: allow octal numbers greater than 777 to accommodate
          modes and umasks that include sticky/setuid/setgid bits. Report
          and fix from Martijn Dekker <martijn@inlv.org>

                                   3/19
                                   ----
lib/readline/bind.c
        - rl_generic_bind: make sure we only assign to prevkey in the loop
          if the key sequence index is > 0, so ic is valid. Fixes bug
          reported by Koichi Murase <myoga.murase@gmail.com>

builtins/read.def
        - read_builtin: be slightly less aggressive checking for timeouts and
          SIGALRM: if we successfully read a character, don't check for a
          timeout until we store or process it. Fixes timing problem
          reported by Rob Foehl <rwf@loonybin.net>

                                   3/22
                                   ----
sig.c
        - termsig_handler: add a call to exit(1) after the kill, just in case
          there are circumstances where the SIG_DFL signal handler is
          ignored.  Report from Andrei Vagin <avagin@gmail.com>

                                   3/25
                                   ----
lib/readline/bind.c
        - _rl_function_of_keyseq_internal: new internal function that takes a
          length parameter to accommodate NUL in the key sequence. Patch from
          Koichi Murase <myoga.murase@gmail.com>
        - rl_function_of_keyseq_len: new application-callable function that
          takes a length parameter; otherwise equivalent to rl_function_of_keyseq.

lib/readline/readline.h
        - rl_function_of_keyseq_len: add extern declaration for new function

lib/readline/doc/rltech.texi
        - rl_function_of_keyseq_len: document new function interface

bushline.c
        - bush_execute_unix_command: use rl_function_of_keyseq_len to handle
          key sequences with embedded NULs (\C-@). Fix from Koichi Murase
          <myoga.murase@gmail.com>

lib/readline/bind.c
        - rl_bind_key_if_unbound,rl_bind_key_if_unbound_in_map: run the KEY
          argument through rl_untranslate_keyseq to produce a symbolic sequence
          that can encode \C-@.
        - rl_bind_keyseq_if_unbound_in_map: translate the key sequence in order
          to accommodate symbolic key sequences; should be a no-op for `raw'
          key sequences such as the arrow key seqeunces from terminfo. Change
          from Koichi Murase <myoga.murase@gmail.com>

                                    4/2
                                    ---
jobs.c
        - wait_for: when setting the SIGINT signal handler to wait_sigint_handler
          make sure we're not setting old_sigint_handler recursively, as we
          can when running an external command in a trap we took after a
          command exited due to SIGINT. We don't want to overwrite
          old_sigint_handler here. Fixes bug reported by Dr. Werner Fink
          <werner@suse.de>

execute_cmd.c
        - execute_disk_command: when there is a command_not_found_hook, make
          sure the subshell turns off job control before running it, in case
          it runs processes. We don't want it to manipulate process groups.
          Fixes bug reported by ÐиÑиллов Ðима <dk.1997-fast@yandex.ru>
        - execute_command_internal: make sure the command run by the `command'
          builtin doesn't cause the ERR trap to be executed; wait for the
          status to be returned by the command builtin. Fixes bug reported by
          Martijn Dekker <martijn@inlv.org>

                                    4/4
                                    ---
subst.c
        - process_substitute: handle longjmp back to top_level and function
          returns (return_catch) in the child process, like command
          substitution, so we don't longjmp back to some arbitrary spot from
          the `exit' or `return' builtins, or on an expansion error, like
          the command timing code. Fixes bug reported by Basin Ilya
          <basinilya@gmail.com>

                                    4/6
                                    ---
parse.y
        - read_token_word: when reading a matched pair of backquotes as part
          of a word, treat it as quoted so the characters are read as a single
          word, but do not let the presence of the backquote mark the word as
          quoted. Fixes here-document delimiter bug reported by Denys Vlasenko
          <dvlasenk@redhat.com>

                                    4/7
                                    ---
execute_cmd.c
        - execute_case_command: call quote_string_for_globbing with the
          QGLOB_CTLESC flag for both quoted and unquoted words, so it will
          remove CTLESC/CTLESC in all cases while converting other quoted
          characters to use a preceding backslash. Bug reported by
          Martijn Dekker <martijn@inlv.org>

                                    4/9
                                    ---
smatch.c
        - posix_cclass_only: helper function that checks whether a pattern has
          only posix single-byte character classes ([:alpha:], etc.) or has
          none at all
        - xstrmatch: if running in a multibyte locale, make sure to short-
          circuit to the single-byte matching code only if there are no
          unrecognized character class names, since the wide character ctype
          functions allow locales to define their own character class names
          (e.g., "hyphen"). Fixes issue reported by yangyajing <yyj_cqu@163.com>

                                   4/10
                                   ----
configure.ac,cross-build/qnx.cache
        - qnx: add a configure cache file for cross-building, treat qnx 7 like
          qnx 6 in terms of cpp options. Fix from Brian Carnes
          <bcarnes@google.com>

aclocal.m4
        - BUSH_CHECK_DEV_STDIN: experimental change to test for /dev/stdin
          independently of /dev/fd or /proc/self/fd. Suggested for QNX by
          Brian Carnes <bcarnes@google.com>


                                   4/11
                                   ----
lib/glob/glob.c
        - glob_testdir: return -2 if DIR is a symlink, to differentiate it from
          any other kind of non-directory file
        - glob_vector: if we have GX_ALLDIRS (globstar), we want to skip over
          symlinks to directories, since we will pick up the real directory
          later. Fixes incompatibility reported by Murukesh Mohanan
          <murukesh.mohanan@gmail.com>

bushline.c
        - bush_execute_unix_command: changes to make READLINE_POINT apply to
          characters instead of bytes when in a multibyte locale. Report and
          fix from Koichi Murase <myoga.murase@gmail.com>

                                   4/12
                                   ----
builtins/evalstring.c
        - parse_and_execute_cleanup: now takes an argument which is the value
          of running_trap at some point before parse_and_execute was called;
          changed callers in sig.c, builtins/evalfile.c

builtins/common.h
        - parse_and_execute_cleanup: changed prototype

                                   4/13
                                   ----
builtins/evalstring.c
        - parse_and_execute_cleanup: if the argument holding the previous state
          of running_trap is the same value as the current running_trap state,
          don't call run_trap_cleanup: assume that there is a caller who will
          take care of the cleanup after this returns. Fixes recursive trap
          call on "eval return" reported by Martijn Dekker <martijn@inlv.org>

parse.y
        - read_a_line: if remove_quoted_newline is non-zero, indicating the
          here-document delimiter is unquoted, we will be running the contents
          of the here-document through word expansion and need to quote CTLESC
          and CTLNUL in the input. Fixes bug with ^A in here document reported
          by Jorge Alberto Baca Garcia <bacagarcia@me.com>

                                   4/18
                                   ----
pathexp.c
        - quote_string_for_globbing: make sure the QGLOB_CTLESC code handles
          both CTLESC CTLESC and CTLESC CTLNUL in the same way. Fixes bug
          reported by Martijn Dekker <martijn@inlv.org>

                                   4/19
                                   ----
execute_cmd.c
        - execute_command_internal: before executing any command in the current
          shell, and before copying any existing FIFO list, call
          reap_procsubs to unlink or close any process substitution pipes
          associated with processes that have exited. Fixes hang in test suite
          when trying to open a FIFO with no process having it open for
          reading

                                   4/26
                                   ----
parse.y
        - read_token_word: if returning REDIR_WORD for a {id}>foo construct,
          for example, make sure to assign the_word to yylval.word before
          returning, in case a recursive call to the parser overwrites it
          (e.g., when evaluating array indexes). From a message to
          austin-group-l from Stephane Chazelas <stephane.chazelas@gmail.com>

lib/glob/sm_loop.c
        - BRACKMATCH: if we have an invalid character class in an otherwise
          well-formed bracket expression, don't try to match each character
          of the (invalid) class individually; just skip over the class and
          move on.  From a message on the austin-group list from
          Stephane Chazelas <stephane.chazelas@gmail.com>

                                   4/27
                                   ----
variables.c
        - push_exported_var,push_func_var,push_temp_var: make sure to set the
          context correctly in the variable we bind in the previous (non-temp)
          scope. Report from Martijn Dekker <martijn@inlv.org>

pathexp.c
        - unquoted_glob_pattern_p: a pattern that contains a backslash can
          have it removed by the matching engine (since backslash is special
          in pattern matching), so if the pattern contains a backslash, and
          does not end in a backslash, we need to return true. Fixes bug
          reported by Robert Elz <kre@bmunnari.OZ.AU>

lib/glob/glob_loop.c
        - INTERNAL_GLOB_PATTERN_P: same change to return TRUE for a backslash
          that doesn't end the pattern

lib/sh/timeval.c
        - print_timeval: use locale_decpoint() instead of fixed `.' to print
          decimal point. Bug report in austin-group email from Joerg Schilling
          <Joerg.Schilling@fokus.fraunhofer.de>

lib/sh/clock.c
        - print_clock_t: use locale_depoint() in the same way as print_timeval

                                   4/29
                                   ----
subst.c
        - expand_cond_node: if special != 0, make sure to add QGLOB_CTLESC
          to the flags passed to quote_string_for_globbing. Same issue as the
          one with `case' fixed on 4/7, report from Martijn Dekker
          <martijn@inlv.org>

                                   4/30
                                   ----
redir.c
        - do_redirection_internal: r_close_this: if the file descriptor is
          already closed before the shell is asked to close it, make sure to
          add an undo list redirect to make sure it stays closed. Report from
          Martijn Dekker <martijn@inlv.org>

                                    5/2
                                    ---
variables.c
        - push_posix_temp_var: new function, takes the SHELL_VAR * passed as
          an argument and uses the name and value to create a global variable
        - merge_temporary_env: if posixly_correct is set, call
          push_posix_temp_var to create global variables, otherwise call
          push_temp_var to preserve the old behavior. Right now, it's only
          called when in posix mode, but that might change. This undoes the
          change from 4/27 when in posix mode

                                    5/3
                                    ---
sig.c
        - struct that holds the terminating signal information has a new
          field: whether that signal is expected to cause a core dump
        - termsig_handler: if the call to kill(2) doesn't kill the process,
          we have a problem. If our pid is not 1, we just exit with status
          128+sig (fake the sig exit status). If the pid is 1, we assume
          we're in a Linux pid namespace and aren't allowed to send a signal
          to ourselves. If we need to generate a core dump, we try to get
          the kernel to SIGSEGV us by dereferencing location 0. If not, we
          just exit with 128+sig. From a report and patch from Andrei Vagin
          <avagin@virtuozzo.com>

                                    5/4
                                    ---
bushline.c
        - bush_execute_unix_command: make sure that parse_and_execute is called
          with newly-allocated memory to avoid prematurely freeing the
          command. Report and fix from Koichi Murase <myoga.murase@gmail.com>

                                    5/7
                                    ---
builtins/shopt.def
        - syslog_history: a shell option to control whether history is logged
          to syslog; can be modified at runtime. Original patch from
          Siteshwar Vashisht <svashisht@redhat.com>

config-top.h
        - SYSLOG_SHOPT: new configurable option, determines whether there is a
          shell option to control syslogging history lines at runtime and sets
          the default value of the option

bushline.c
        - syslog_history: new variable to control whether history lines are
          sent to syslog; default value is the value of SYSLOG_SHOPT (or 1
          if that's not defined)
        - bush_add_history: send history lines to syslog if syslog_history is
          non-zero

                                   5/10
                                   ----

variables.c
        - push_var_context: if we are in Posix mode and manipulating the
          temporary environment (temporary_env), implement behavior specified
          in Posix interp 1009 and make sure that temporary assignments
          preceding function calls modify the current environment *before*
          the function is executed.

[bush-5.0-alpha frozen]

                                   5/12
                                   ----
execute_cmd.c
        - execute_in_subshell: subshells should set loop_level == 0, since
          they are no longer "enclosed" by the loop, according to posix.
          Report from Aeron.E. Wang <aeron.e.wang@gmail.com>

                                   5/24
                                   ----
Makefile.in
        - pkgconfigdir: don't fail installing bush.pc if this directory doesn't
          exist or isn't writable -- there's no error in failing to install
          something nothing will use
        - install-headers-dirs: creat $(pkgconfigdir) if it doesn't exist

lib/sh/shmbchar.c
        - utf8_mblen: replace with version from gnulib
        - utf8_mbstrlen: reimplement using utf8_mblen so it handles invalid
          multibyte sequences in the same way as mbstrlen

lib/readline/mbutil.c
        - _rl_utf8_mblen: utf-8 specific version of mblen from gnulib

include/shmbutil.h
        - ADVANCE_CHAR,COPY_CHAR_P: do better job detecting end of string in
          UTF-8 locales (should not be called with an empty string, but to
          be safe)

                                   5/25
                                   ----
lib/sh/utf8.c
        - new file, utf-8-specific functions collected from other files

externs.h
        - extern declarations moved around for utf8.c

include/shmbutil.h
        - SADD_MBCHAR, SADD_MBQCHAR_BODY, ADVANCE_CHAR_P: if the locale is a
          UTF-8 locale, don't bother with a call to mbrlen if the current
          character cannot start a multibyte character

variables.c
        - push_var_context: only merge the temporary environment in posix mode
          if we are executing a shell function (flags & VC_FUNCENV). Report
          from Martijn Dekker <martijn@inlv.org>

lib/readline/mbutil.c
        - _rl_get_char_len: don't call mbrlen if we are in a UTF-8 locale and
          the character cannot start a multibyte sequence

builtins/read.def
        - read_builtin: if mb_cur_max > 1, call read_mbchar only if we're not
          in a utf-8 locale or, if we are, the character we just read indicates
          the start of a multibyte sequence

subst.c
        - string_extract_verbatim: don't call MBRLEN if we're in a utf-8
          locale and the current character can't start a multibyte sequence
        - setifs: don't call MBRLEN if we're in a utf-8 locale and the first
          character of $IFS can't start a multibyte sequence

lib/readline/kill.c
        - rl_bracketed_paste_begin: make sure we return 0 here if rl_insert_text
          returns the right number of characters inserted to be consistent
          with other functions. Returns 1 otherwise. Report and fix from
          Gabe Krabbe <gabe@rtfs.de> back in March, 2018

lib/readline/readline.c
        - rl_subseq_result: make sure r is < 0 before checking map[ANYOTHERKEY]
          to see if we shadowed a key that should now be tried

                                   5/27
                                   ----
variables.c
        - assign_aliasvar: perform same validity check on subscript assignment
          as alias builtin performs on name argument. Bug report from
          Mike Jonkmans <bushbug@jonkmans.nl>

                                   5/29
                                   ----
builtins/setattr.def
        - set_var_attribute: we should not propagate a variable assignment
          preceding a builtin back to the calling environment unless the
          shell is in posix mode. Since previous versions of the shell do
          this, setting the shell compatibility level to 44 or less will
          continue the propagation behavior

                                    6/1
                                    ---
lib/readline/histexpand.c
        - history_tokenize_word: as part of teaching history tokenization more
          and more about shell syntax, allow command and process subsitution
          and extended globbing patterns to appear within a word being
          tokenized and not just at the beginning. Fixes bug reported back in
          2/2017 by ecki@tofex.de

bushhist.c
        - load_history: use HISTSIZE_DEFAULT (still defaults to "500") to set
          the initial value of $HISTSIZE. HISTSIZE_DEFAULT can be overridden
          in config-top.h

                                    6/4
                                    ---
configure.ac
        - make sure we link against an external readline library that's at
          least version 8

                                    6/8
                                    ---
pcomplete.h
        - INITIALWORD: internal compspec name for programmable completion on
          the initial (usually the command) word

bushline.c
        - attempt_shell_completion: if we are in a command position and the
          user has defined a compspec for INITIALWORD, use programmable
          completion to complete command words. Original patch from
          Luca Boccassi <bluca@debian.org>

lib/readline/doc/rluser.texi,builtins/complete.def,doc/bush.1
        - make it clearer that -D takes precedence over -E when supplied as
          options to `complete', not when they are applied during completion

builtins/complete.def
        - complete_builtin,compgen_builtin: add support for -I option
        - print_one_completion,print_compopts: display -I when appropriate

lib/readline/doc/rluser.texi,doc/bush.1
        - complete,compgen: document new -I option and its effect

                                   6/10
                                   ----
lib/readline/histfile.c
        - read_history_range: don't apply the heuristic and try to append a
          history line to an existing history entry if we don't have any
          history entries. Bug and fix from Edward Huff <ejhuff@gmail.com>

                                   6/12
                                   ----
bushline.c
        - attempt_shell_completion: don't all the programmable completion for
          INITIALWORD if programmable completion is disabled
        - attempt_shell_completion: make sure in_command_position remains set
          for an empty command word on an otherwise blank line, making the
          presence of assignment statements optional.  Report from
          Luca Boccassi <bluca@debian.org>

                                   6/20
                                   ----
lib/malloc/malloc.c
        - morecore,internal_malloc,internal_free: requests for more than
          128K bytes (defined as MMAP_THRESHOLD and saved in the new
          malloc_mmap_threshold variable) are now satisfied via mmap and
          freed via munmap. We only use mmap if we have mmap and MAP_ANON
          (or MAP_ANONYMOUS). These blocks are not available for splitting
          or coalescing, so every request for 128K bytes or smaller is
          satisfied via sbrk(). We don't use mremap for realloc yet, but
          we could in the future

lib/malloc/mstats.h
        - malloc_stats: the malloc stats now include the number of calls to
          mmap and the total number of bytes requested via mmap. The number
          of calls to munmap is captured in each bucket's lesscore count

lib/malloc/stats.c
        - print_malloc_stats: now prints an indication of where the change from
          sbrk to mmap takes place, and prints number of mmap calls and total
          number of bytes allocated using mmap

                                   6/22
                                   ----
variables.c
        - get_bushargcv: new dynamic "fetch" variable for BUSH_ARGV and
          BUSH_ARGC, for backwards compatibility: if a script makes a
          reference to either variable at the top level (not in a shell
          function) without enabling debugging mode and not having initialized
          the variable previously (using a simple semaphore), create the
          variables

                                   6/25
                                   ----
configure.ac
        - opt_bush_malloc: bush malloc no longer disabled for systems that
          require eight-bit alignment; the bush malloc has had this for a
          long time

                                    7/4
                                    ---
bushline.c
        - pre_process_line: if command-oriented history is enabled, and the
          line being expanded is the second or later in a multi-line command,
          and we know the command is being saved as the current history entry,
          decrease history_length before calling history_expand so references
          like !! refer to the previous history entry as usual

lib/readline/histexpand.c
        - history_quoting_state: new variable, can be set by calling
          application before calling history_expand to note that the string
          being expanded is part of a quoted string. Can be set to a single
          quote, a double quote, or 0 (no quoting)
        - history_expand: look at history_quoting_state and honor the
          single-quote setting by not expanding any initial portion of the
          line before the closing single quote. This allows history expansions
          to be performed on a line containing a closing single quote if they
          appear after the single quote

lib/readline/history.h
        - history_quoting_state: extern declaration

bushhist.c
        - bush_history_inhibit_expansion: if history_quoting_state indicates
          that this string is single-quoted, skip over the single-quoted
          portion and determine whether or not the portion after the
          quoted string needs to be inhibited from history expansion

parse.y
        - shell_getc: set history_quoting_state based on the contents of the
          current delimiter before calling pre_process_line

                                    7/6
                                    ---
lib/readline/doc/hsuser.texi
        - describe the default behavior of backslash and single and double
          quotes

lib/readline/doc/hstech.texi
        - history_quoting_state: describe effect of setting this variable
        - history_quotes_inihibit_expansion: expand the description to include
          the default quoting behavior that setting this variable enables

                                    7/9
                                    ---
support/man2html.c
        - unescape: use memmove instead of strcpy to handle overlapping strings
          Report and fix from Bernhard M. Wiedemann <bwiedemann@suse.de>

lib/sh/getenv.c
        - getenv: check that environ is non-NULL before looking through it.
          Report and fix from Keeley Hoek <keeley@hoek.io>

                                   7/12
                                   ----
braces.c
        - mkseq: use better integer overflow handling for systems with 32-bit
          ints and 64-bit intmax_ts. Bug reported by Simon Wörner
          <mail@simon-woerner.de> as the result of fuzzing

builtins/declare.def
        - declare_internal: make sure bind_variable returns non-NULL when
          setting attributes for a variable named as an argument to declare
          that also appears in the temporary environment (and is a nameref).
          Bug reported by Simon Wörner <mail@simon-woerner.de as the
          result of fuzzing

variables.c
        - bind_variable_internal: if we're assigning through a nameref, don't
          create a variable with an invalid name under any circumstances

builtins/common.c
        - get_job_spec: make sure to return NO_JOB if atoi() returns < 0 due
          to integer overflow.
          Bug reported by Simon Wörner <mail@simon-woerner.de as the
          result of fuzzing

                                   7/13
                                   ----
execute_cmd.c
        - execute_in_subshell: don't call set_sigint_handler if the subshell
          is asynchronous, since it undoes the signal handler installed by
          setup_async_signals. Fixes bug reported by Daniel Mills
          <danielmills1@gmail.com>

parse.y,externs.h
        - reset_readahead_token: new convenience function for the rest of
          the shell, resets token_to_read if it's a newline (as it will be
          after reset_parser is called)

eval.c
        - reader_loop: if we're just going to execute one command, make sure
          the read-ahead token isn't set to something that will result in a
          NULL command (by calling reset_readahead_token), since the code
          will take that as the one command and set EOF_Reached

                                   7/15
                                   ----
doc/{bush.1,bushref.texi}
        - indirect expansion: clarify that the expansion works on parameters,
          not just variables (NAMEs). Suggested by konsolebox
          <konsolebox@gmail.com>

                                   7/16
                                   ----
doc/{bush.1,bushref.texi}
        - INSIDE_EMACS: document its effect on line editing

                                   7/17
                                   ----
lib/readline/{readline.c,rlprivate.h}
        - _rl_eof_found: new variable, private to the readline library, that
          indicates whether the current call to readline() will return NULL
          because we read EOF

lib/readline/rltty.c
        - rl_deprep_terminal: if bracketed paste mode is active, the last
          character of the string to disable it is \r (to avoid confusing
          the terminal driver about where the cursor is). In this case,
          output a newline before returning so subsequent text (like the
          `exit' bush prints) doesn't overwrite the prompt. Bug from
          https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=903936

variables.c
        - make_local_assoc_variable: add second argument like corresponding
          local array function, to allow this function to return an existing
          local array variable to the caller for the caller to handle

variables.h
        - make_local_assoc_variable: change function prototype to add second
          arg

{subst.c,variables.c}
        - make_local_assoc_variable: change callers

builtins/declare.def
        - declare_internal: call make_local_assoc_variable with a non-zero
          second arg to have it return an existing local array variable to be
          flagged as an error. Fixes bug reported by Grisha Levit
          <grishalevit@gmail.com>
        - declare_internal: call make_local_array_variable with unconditional
          second argument of 1 for the same reason as above

                                   7/18
                                   ----
variables.c
        - bind_invalid_envvar: new function, takes invalid names from the
          initial environment (names that are not valid shell identifiers) and
          stores them in a separate hash table (invalid_env)
        - maybe_make_export_env: make sure to add names from invalid_env to
          the export env
        - assign_in_env: for now, prevent variable names that aren't shell
          identifiers from being added to the temporary environment. Addresses
          issue raised by Grisha Levit <grishalevit@gmail.com>

test.c
        - unary_test: rearrange code slightly to avoid a wasted variable lookup
          if the argument to -v is a subscripted array reference

                                   7/19
                                   ----
variables.c
        - nameref_transform_name: if a name doesn't resolve to a shell variable,
          this function will check whether it resolves to a nameref that
          points to a variable that hasn't been created yet

variables.h
        - nameref_transform_name: extern declaration

subst.c
        - do_compound_assignment: make sure that we follow any nameref chain
          if the name passed resolves to a nameref that points to a variable
          that doesn't exist. Fixes issue raised by Grisha Levit
          <grishalevit@gmail.com>

builtins/declare.def
        - declare_internal: before calling any variant of make_local_variable,
          make sure to perform any transformation of the name indicated by an
          existing nameref. Fixes issue raised by Grisha Levit
          <grishalevit@gmail.com>

                                   7/20
                                   ----
builtins/declare.def
        - declare_internal: if we are creating a global variable with -g, even
          if we're not giving it a value, check for namerefs at the global
          scope to avoid confusion with namerefs at the local (function) scope.

subst.c
        - expand_word_internal: if a double-quoted string expands to nothing,
          make sure we note that for later by setting had_quoted_null, just
          as we do for single-quoted empty strings

subst.[ch]
        - W_SAWQUOTEDNULL: new flag (replaces W_HASCTLESC, which is unused),
          means that we saw a possibly-discarded quoted null while expanding
          this word

subst.c
        - expand_word_internal: if expansion results in a non-empty word but
          we saw a quoted null during expansion (had_quoted_null == 1), set
          W_SAWQUOTED_NULL in the returned word
        - expand_word_internal: if a recursive call to param_expand comes back
          with W_SAWQUOTEDNULL set in the resulting word, set had_quoted_null
          to note it
        - parameter_brace_expand_rhs: if a recursive call to expand_word_internal
          returns a non-quoted-null string (after an optional call to
          string_list) make sure we pass the W_SAWQUOTEDNULL flag back to the
          caller
        - word_list_split: if a word expands to nothing after expansion and
          splitting, but we saw a quoted null during the expansion
          (W_SAWQUOTEDNULL), return an empty word

                                   7/25
                                   ----

subst.c
        - do_compound_assignment: if creating a local variable, make sure to
          set `newname' to the name of the variable returned from find_variable,
          since that follows namerefs. Fixes issue raised by Grisha Levit
          <grishalevit@gmail.com>

                                   7/29
                                   ----
subst.c
        - get_var_and_type: if VALUE is NULL, check before calling dequote_string.
          Report and fix from Grisha Levit <grishalevit@gmail.com>

                                   7/30
                                   ----
variables.c
        - make_local_{array,assoc}_variable: make sure we're not trying to
          inherit a value from an incompatible array type. Fixes issue raised
          by Grisha Levit <grishalevit@gmail.com>
        - nameref_transform_name: if we're trying to resolve a nameref that
          will be used to create a local variable, make sure the nameref is
          at the same variable scope. Report from Grisha Levit
          <grishalevit@gmail.com>

                                    8/2
                                    ---
array.c
        - array_subrange: change to use string_list_pos_params after creating a
          WORD_LIST from the array slice, like assoc_subrange does

subst.c
        - parameter_brace_substring: since assoc_subrange and array_subrange
          both call string_list_pos_params now, treat the results the same as
          the VT_POSPARAMS case (pos_params also calls string_list_pos_params).
          Fixes behavior difference between ${a[@]:sub} and ${@:sub} reported
          by Ilkka Virta <itvirta@iki.fi>

                                    8/3
                                    ---
array.c
        - array_patsub: rewrite to work in terms of a WORD_LIST * and call
          string_list_pos_params on the result to be consistent with the
          expansions of ${@/pat/rep} and ${*/pat/rep}

assoc.c
        - assoc_patsub: rewrite to work in terms of a WORD_LIST * and call
          string_list_pos_params on the result to be consistent with the
          expansions of ${@/pat/rep} and ${*/pat/rep}

subst.c
        - parameter_brace_patsub: change how return value of {array,assoc}_patsub
          is treated to make it identical to pos_params_pat_subst, since they
          all call string_list_pos_params now
        - expand_string_for_pat: make sure we preserve the value of
          expand_no_split_dollar_star instead of just unconditionally setting
          it back to 0 in case it was 1 before this function was called

                                    8/6
                                    ---
array.c
        - array_modcase: rewrite to work in terms of a WORD_LIST * and call
          string_list_pos_params on the result to be consistent with the
          expansions of ${@,,} and ${*,,}

assoc.c
        - assoc_modcase: rewrite to work in terms of a WORD_LIST * and call
          string_list_pos_params on the result to be consistent with the
          expansions of ${@,,} and ${*,,}

subst.c
        - parameter_brace_casemod: change how return value of {array,assoc}_modcase
          is treated to make it identical to pos_params_modcase, since they
          all call string_list_pos_params now

                                    8/8
                                    ---
builtins/declare.def
        - declare_internal: if we are making local variables, and not dealing
          with the nameref attribute, make sure that any nameref variable we
          followed when resolving the name given was at the same variable
          context. If not, we just want to make or use a local variable with
          the name passed; if so, we want to use the nameref value as the
          variable name. Report from Grisha Levit <grishalevit@gmail.com>

                                    8/9
                                    ---
configure.ac
        - globasciiranges: RRI now on by default, must be turned off explicitly
          at configure time or runtime with `shopt -u globasciiranges'

                                   8/14
                                   ----
variables.c
        - dispose_saved_dollar_vars: decrement stack pointer before looking
          for saved positional parameters to dispose; stack pointer always
          points to the first unused slot

                                   8/15
                                   ----
variables.c
        - dollar_arg_stack: now a stack of struct saved_dollar_vars, which has
          an array for the first ten (dollar_vars) and a WORD_LIST * for the
          remaining (rest_of_args). Fixes performance issue with function calls
          and large numbers of positional parameters raised by
          Bize Ma <binaryzebra@gmail.com>
        - {save,restore,free,free_saved}_dollar_vars: new functions to manage
          dollar_vars and dollar_arg_stack members. Need to keep these in sync
          with whatever remember_args does
        - push_dollar_vars: use save_dollar_vars, which just copies pointers,
          and directly assign rest_of_args, without copying the words, to the
          dollar_arg_stack entry. Have to clear dollar_vars and rest_of_args
          with the assumption that callers will call remember_args(args, 1)
          immediately following
        - pop_dollar_vars: free current positional parameters and restore old
          ones from pointers saved in dollar_arg_stack, making sure to
          invalidate any cached value for "$@"
        - dispose_saved_dollar_vars: free saved pointers from current index
          into dollar_arg_stack

doc/{bush.1,bushref.texi}
        - POSIXLY_CORRECT: make sure to note that bush makes sure this variable
          is set when posix mode is enabled

                                   8/17
                                   ----
{jobs,nojobs}.c
        - set_jobs_list_frozen: set jobs_list_frozen to a particular value.
          Intended to save and restore the value around code sections instead
          of unconditionally unfreezing it.

jobs.h
        - set_jobs_list_frozen: extern declaration

execute_cmd.c
        - execute_pipeline: if lastpipe is enabled, save and restore the
          value of jobs_list_frozen using freeze_jobs_list/set_jobs_list_frozen
          to avoid problems with race conditions and nested pipelines
          causing jobs to be removed from the jobs table. Fixes savannah issue
          https://savannah.gnu.org/support/index.php?109541 reported by
          Björn Kautler <vampire0>

                                   8/24
                                   ----
execute_cmd.c
        - lastpipe_cleanup: call set_jobs_list_frozen instead of
          unfreeze_jobs_list
        - execute_pipeline: set up lastpipe_cleanup with old value of
          jobs_list_frozen

                                    9/3
                                    ---
builtins/printf.def
        - getuintmax,getfloatmax: on a conversion error, return as much of the
          value as we were able to convert instead of 0. Fixes bug reported
          by Robert Elz <kre@bmunnari.OZ.AU>

                                    9/4
                                    ---
lib/readline/text.c,lib/readline/rlprivate.h
        - _rl_backward_char_internal: new function, guts of rl_backward_char
          and rl_backward_byte, not currently used there

lib/readline/vi_mode.c
        - _rl_vi_advance_point: new function, move point forward by one
          character, handling multibyte locales and characters and the end
          of line semantics
        - _rl_vi_backup_point: new function, move point backward by one
          character, handling multibyte locales and characters
        - rl_vi_eword,rl_vi_eWord: use rl_vi_advance_point instead of a simple
          increment to handle multibyte characters.  Fixes bug reported by
          Enrico Maria De Angelis <enricomaria.dean6elis@gmail.com>

                                    9/5
                                    ---
lib/readline/vi_mode.c
        - rl_vi_fword,rl_vi_fWord: use rl_vi_advance_point instead of a simple
          increment to handle multibyte characters
        - rl_vi_bword,rl_vi_bWord: use rl_vi_backup_point instead of a simple
          decrement (and _rl_vi_advance_point where necessary) to handle
          multibyte characters
        - rl_vi_complete,_rl_vi_change_mbchar_case,_rl_vi_domove_motion_cleanup:
          use _rl_vi_advance_point instead of simple rl_point increment
        - vi_delete_dispatch,vi_change_dispatch,vi_yank_dispatch: use
          INCREMENT_POS instead of a simple increment to rl_mark to handle
          multibyte characters
        - rl_vi_column: use _rl_forward_char_internal, starting with
          rl_point == 0, to handle multibyte characters (Posix says `character
          position', not index)

                                    9/7
                                    ---
configure.ac
        - changed release status to `beta'

                                    9/9
                                    ---
lib/readline/display.c
        - _rl_update_final: if the bottom line has zero characters and we are
          on that line at column 0, don't bother with an additional \r\n.
          Fixes redisplay nit reported by Per Bothner <per@bothner.com>


configure.ac
        - openbsd needs DEV_FD_STAT_BROKEN defined

[bush-5.0-beta frozen]

                                   9/11
                                   ----
builtins/exec.def
        - exec_builtin: make sure to sync the buffered stream where bush is
          reading input (especially if it's fd 0) so a command exec'd by the
          script can read the rest of stdin after the exec

                                   9/15
                                   ----
lib/readline/histexpand.c
        - history_tokenize_internal: if the event contains embedded newlines
          (e.g., bush with command-oriented history and lithist), use them as
          word delimiters, equivalent to space and tab, so they don't end up
          as separate words. Fixes issue pointed out by Viktor Dukhovni
          <ietf-dane@dukhovni.org>
        - history_tokenize_word: don't break if we get a newline (though we
          shouldn't get one due to the loop in history_tokenize_internal
        - history_expand_internal: use newline as a whitespace character when
          expanding by words, as we do with history_tokenize_internal

jobs.h
        - J_PIPEFAIL: new flag for `flags' element of job struct

jobs.c
        - stop_pipeline: if pipefail_opt set, newjob gets J_PIPEFAIL in its
          flags word
        - raw_job_exit_status: use J_PIPEFAIL (setting of pipefail when job
          created) instead of current setting of pipefail status to determine
          how to compute exit status of pipeline. Tentative implementation of
          Posix proposal

expr.c
        - exp0: don't call expr_bind_variable with a NULL string.  Fixes
          fuzzing bug reported by Eduardo Bustamante <dualbus@gmail.com>
        - expr_bind_variable: don't try to do anything with a NULL or empty
          LHS

                                   9/16
                                   ----
lib/readline/undo.c
        - rl_do_undo: before we release the undo list entry we've just
          processed, make sure we avoid any pointer aliasing issues caused
          by having the entry being removed as part of the undo list in
          _rl_saved_line_for_history. Fixes fuzzing bug reported by
          Eduardo Bustamante <dualbus@gmail.com>

                                   9/17
                                   ----
[bush-5.0-beta released]

                                   9/18
                                   ----
lib/readline/bind.c
        - name_and_keymap: new struct for keymap names and maps
        - builtin_keymap_names: static array of builtin keymap names and
          maps; preparing for allowing applications to set the names of
          keymaps they create; keymap_names is initially a pointer to
          this array
        - _rl_get_keymap_by_name,_rl_get_keymap_by_map: new functions for
          searching the keymap_names array and returning an index
        - rl_get_keymap_by_name, rl_get_keymap_name: rewritten in terms of
          new functions above
        - rl_set_keymap_name (char *name, Keymap map): new function, set
          name of MAP to NAME. NAME must not be builtin; MAP must not be one
          of the builtin keymaps. Request and initial implementation from
          Tom Tromey <tom@tromey.com>

lib/readline/readline.h
        - rl_set_keymap_name: new extern declaration for new public function

lib/readline/doc/rltech.texi
        - rl_set_keymap_name: add documentation

lib/readline/doc/rluser.texi
        - add text to `set keymap' description to note that applications
          can add keymap names that can be used there

                                   9/20
                                   ----
parse.y
        - shell_getc: don't execute the alias hack (returning a space at the
          end of the string) if we are parsing a command substitution that
          starts with a double paren (subshell inside a comsub), in which
          case the flags are PSH_DPAREN. Fixes fuzzing bug reported by
          Eduardo Bustamante <dualbus@gmail.com>

lib/readline/isearch.c
        - _rl_isearch_dispatch: default case: make sure we check multibyte
          char length when deciding whether to enlarge the search string
          buffer, instead of using the old assumption. Fixes fuzzing bug
          reported by Eduardo Bustamante <dualbus@gmail.com>

builtins/fc.def,execute_cmd.c
        - fixed some missing free()s uncovered by coverity. Report from
          Siteshwar Vashisht <svashisht@redhat.com>

lib/glob/glob.c
        - glob_vector: make sure name_vector is initialized to NULL

lib/sh/{pathcanon,pathphys}.c
        - {pathcanon,pathphys}: use memmove instead of strcpy on a possibly-
          overlapping region of memory

subst.c
        - parameter_list_transform: make sure to dispose the word list in all
          cases before returning
        - parameter_brace_expand_rhs: make sure t1 is freed before returning
          due to an invalid name resulting from an indirect expansion

support/man2html.c
        - fixed a couple of memory leaks

                                   9/21
                                   ----
subst.c
        - process_substitute: if we are part of a job control process chain
          (pipeline_pgrp != shell_pgrp), have the child shell forked to run
          the process substitution set pipeline_pgrp to its own PID,
          effectively becoming a process group leader without changing
          its own process group. Fixes stray SIGHUP issue reported by
          Jeremy Townshend <jeremy.townshend@gmail.com>
 
                                   9/23
                                   ----
arrayfunc.c
        - assign_array_element: if we are assigning to an existing associative
          array, and assoc_expand_once is set, allow `*' and `@' as subscripts.
          Partial fix for report from Grisha Levit <grishalevit@gmail.com>

variables.c
        - bind_int_variable: if valid_array_reference (lhs) is not true,
          make sure that the lhs is a valid identifier before assigning the
          value

arrayfunc.c
        - valid_array_reference: allow blank subscripts. They are treated as
          `normal' keys for associative arrays and evaluate to 0 for indexed
          arrays. More of fix for report from Grisha Levit
          <grishalevit@gmail.com>

                                   9/24
                                   ----
bushline.c
        - restore_tilde: if the expanded length (xl) is longer than vl
          we end up requesting a negative amount of memory (an extremely
          large unsigned number). Just punt and return val in this case.
          Fuzzing bug reported by Eduardo Bustamante <dualbus@gmail.com>
        - restore_tilde: make sure we return what the user typed if tilde
          expansion fails

                                   9/29
                                   ----
builtins/shopt.def
        - uncomment `localvar_unset' option definition

doc/{bush.1,bushref.texi}
        - document `localvar_unset' shell option

arrayfunc.c
        - valid_array_reference: if we are parsing a subscript for an existing
          associative array, the `assoc_expand_once' option is set, and the
          VA_ONEWORD flag is set in FLAGS (meaning there should be nothing
          following the closing `]'), don't call skipsubscript to find the
          closing `]', use one that is at the end of the word. Part of fix for
          issue reported by Grisha Levit <grishalevit@gmail.com>

builtins/{printf,set}.def
        - pass VA_ONEWORD as part of flags value everywhere valid_array_reference
          is used

config-top.h
        - CHECKWINSIZE_DEFAULT: now 1, so check_window_size is on by default
        - HISTEXPAND_DEFAULT: new define, allows builder to enable or disable
          history expansion by default at build time

doc/{bush.1,bushref.texi}
        - checkwinsize: document new default value

bushhist.h
        - HISTEXPAND_DEFAULT: don't define if it's already defined. Strict
          POSIX mode continues to default to off

                                   9/30
                                   ----
lib/readline/input.c
        - win32_isatty: win32-specific changes from GDB. Patch submitted by
          Tom Tromey <tom@tromey.com>, originally from Eli Zaretskii
          <eliz@gnu.org>

                                   10/1
                                   ----
lib/readline/vi_mode.c
        - rl_vi_start_inserting: start an undo group so we can grab the text
          inserted here as a single unit, avoiding any insert coalescing
          performed by rl_insert_text. Report and fix from Richard Todd
          <richard.w.todd@outlook.com>

                                   10/3
                                   ----
subst.c
        - parameter_brace_transform: if we're asked to display the attributes
          of an unset variable, check that the variable exists even if
          get_var_and_type returns NULL (it checks invisible_p). Requested by
          Michal Pesa <pesathem@gmail.com>

lib/readline/kill.c
        - _rl_bracketed_text: new function, collects the text pasted in
          bracketed paste mode and consumes the bracketed paste end marker;
          returns the pasted text and its length
        - rl_bracketed_paste_begin: call _rl_bracketed_text to collect the
          text

lib/readline/isearch.c
        - _rl_isearch_dispatch: set cxt->lastc to -7 if the input resolves to
          rl_bracketed_paste_begin
        - _rl_isearch_dispatch: if cxt->lastc == -7, call _rl_bracketed_text
          to collect the pasted text and add it to the accumulating search
          string. Only works if ESC is not one of the isearch terminators.
          Fixes issue reported in Debian bug report 891780,
          https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=891780

                                   10/5
                                   ----
variables.c
        - push_posix_tempvar_internal: new function, body of push_func_var
          with additional argument saying whether it's being called from a
          function or (special) builtin code path
        - push_builtin_var: new function, calls push_posix_tempvar_internal
          with second argument indicating builtin code path
        - push_func_var: now a stub that calls push_posix_tempvar_internal
          with second argument indicating function code path
        - pop_scope: if called from a special builtin, call push_builtin_var
          instead of push_func_var to do the right variable propagation

builtins/shopt.def
        - progcomp_alias: uncomment, make available to users

doc/{bush.1,bushref.texi},lib/readline/doc/rluser.texi
        - progcomp_alias: document shopt option, describe its use in
          the section on programmable completion

trap.c
        - decode_signal: handle SIGRTMIN+n at runtime, with the `SIG' prefix
          or without, case-insensitively if requested, and return SIGRTMIN+n.
          These values could be different than what was available at compile
          time. Report and patch from Rasmus Villemoes <rv@rasumsvillemoes.dk>

                                   10/8
                                   ----
execute_cmd.c
        - execute_command_internal: only set line_number from command->value.Subshell
          if the type == cm_subshell; otherwise defer and set later

                                   10/10
                                   -----
examples/loadables/seq.c
        - seq: new loadable builtin, derived originally from coreutils:seq.c
          but with very little of that code remaining

                                   10/12
                                   -----
trap.c
        - run_pending_traps,_run_trap_internal: honor evalnest_max and
          increment/decrement evalnest accordingly, since trap actions
          are processed as if run by `eval'. Feature suggsted by Mike
          Gerwitz <mtg@gnu.org>

                                   10/16
                                   -----
expr.c
        - expr_skipsubscript: new function, calls skipsubscript with flags
          similar to arrayfunc.c:valid_array_subscript if assoc_expand_once
          is set and it looks like we've already expanded the subscript of
          an associative array. Reported back on 8/27 by Grisha Levit
          <grishalevit@gmail.com>
        - readtok: call expr_skipsubscript instead of skipsubscript

arrayfunc.c
        - valid_array_reference: call skipsubscript with a third arg computed
          from the VA_NOEXPAND flag only if we're expanding an associative
          array subscript -- we already figure out whether or not we are

[bumped release status to beta2]

                                   10/20
                                   -----
builtins/setattr.def
        - set_or_show_attributes: after isolating NAME, make sure to restore
          the "[+]=" in case we need the word later. Issue pointed out by
          Grisha Levit <grishalevit@gmail.com>

                                   10/21
                                   -----
lib/readline/search.c
        - noninc_search_from_pos: if we are supposed to be searching for a
          pattern (vi mode), make sure to pass S to _hs_history_patsearch,
          since that has any leading `^' stripped

lib/readline/histsearch.c
        - _hs_history_patsearch: if the search isn't anchored, put a `*' at
          the beginning to force fnmatch to match anywhere in the line (could
          look at this later to make a change to history_search_internal that
          would avoid the need to add the leading `*')

subst.c
        - parameter_brace_expand_rhs: treat a failure to assign a variable with
          a ${param:=value} expansion as an expansion error, and, in a non-
          interactive posix-mode shell, exit the shell
        - param_expand: don't set W_SPLITSPACE for $* unless IFS is NULL;
          consistent with other uses of W_SPLITSPACE

                                   10/22
                                   -----
doc/{bush.1,bushref.texi}
        - tweak description of bush conditional expressions to note that the
          test and [ commands determine their behavior based on the number of
          arguments. Suggested by Ilkka Virta <itvirta@iki.fi>

                                   10/24
                                   -----
execute_cmd.c
        - execute_simple_command: don't set $_ to NULL when executing a
          command that forks; just leave it unchanged. Tweaked the documentation
          slightly as a result. Inspired by report from Ricky Tigg
          <ricky.tigg@gmail.com>

                                   10/28
                                   -----
redir.c
        - here_document_to_fd: make sure the temp files used to store here
          documents are readable (and writable, where necessary) by the user.
          This can happen in the unlikely case that someone decides to shoot
          himself in the foot by setting the umask to 400. Issue originally
          raised back in March by Stephane Chazelas
          <stephane.chazelas@gmail.com>; fix inspired by Martijn Dekker
          <martijn@inlv.org>

                                   10/29
                                   -----
lib/readline/terminal.c
        - bind_termcap_arrow_keys: bind the "kI" capability (what the Insert
          keypad key outputs) to overwrite mode. Patch from Xose Vazquez Perez
          <xose.vazquez@gmail.com>

                                   10/30
                                   -----
braces.c
        - mkseq: make sure to terminate result array before passing it to
          strvec_dispose on an interrupt. Report and fix from Corbin Souffrant
          <corbin.souffrant@gmail.com>

                                   11/6
                                   ----
trap.c
        - _run_trap_internal: if the signal shows up as SIG_CHANGED after
          running the trap handler, check for terminating signals and run any
          terminating signal handler indicates. Fixes issue reported by
          Owen Stephens <owen@owenstephens.co.uk>

                                   11/7
                                   ----
execute_cmd.c
        - execute_builtin: don't merge the temporary environment when the
          `return' builtin is being executed if it's being executed by the
          `command' builtin, since that's supposed to inhibit the special
          builtin properties. Part of POSIX conformance problems reported
          by Martin Rehak <martin.rehak@oracle.com>

builtins/cd.def
        - bindpwd: if canonicalization fails when -P is specified (e.g. if the
          directory name length exceeds PATH_MAX), reset dirname ($PWD value) =
          to the_current_working_directory (Posix cd description, step 10.)
          Part of POSIX conformance problems reported by Martin Rehak
          <martin.rehak@oracle.com>

builtins/kill.def
        - kill_builtin: support -sSIG and -nSIG without requiring them to be
          separate arguments. POSIX says a "conforming implementation" should
          accept them.
          Part of POSIX conformance problems reported by Martin Rehak
          <martin.rehak@oracle.com>

                                   11/8
                                   ----
arrayfunc.c
        - array_value_internal: return NULL for invisible array variables.
          Fixes issue with FUNCNAME sometimes returning invalid value reported
          by Great Big Dot <greatbigdot@gmail.com>

builtins/cd.def
        - change_to_directory: if we are in posix mode, and the chdir to the
          absolute pathname ($PWD/dirname) fails, return an error without
          trying to use just `dirname' (posix cd step 10).
          Part of POSIX conformance problems reported by Martin Rehak
          <martin.rehak@oracle.com>

execute_cmd.c
        - execute_case_command: use expand_word_leave_quoted to expand the
          word, then dequote the resulting string. This performs the
          expansions in the order posix specifies.
          Part of POSIX conformance problems reported by Martin Rehak
          <martin.rehak@oracle.com>

subst.c
        - expand_word_unsplit: rewrite in terms of expand_word_leave_quoted
        - ifs_whitespace: new macro, Posix ifs whitespace (ISSPACE; member
          of current locale's space char class)
        - ifs_whitesep: new macro, whitespace that is a member of $IFS; used
          by list_string and get_word_from_string
        - list_string: use ifs_whitesep instead of spctabnl in case $IFS
          contains whitespace characters that are not space, tab, or newline
        - get_word_from_string: use ifs_whitesep instead of spctabnl in case
          $IFS contains whitespace characters that are not space, tab, or
          newline.
          Part of POSIX conformance problems reported by Martin Rehak
          <martin.rehak@oracle.com>

                                   11/9
                                   ----
general.c
        - posix_initialize: enable the shift_verbose option when turning on
          posix mode, and disable it when posix mode is disabled. From a
          report by Eric Blake <eblake@redhat.com>

doc/bushref.texi
        - posix mode: note the effect of posix mode on shift_verbose

                                   11/12
                                   -----
subst.c
        - parameter_brace_expand: if parameter_brace_expand_word returns an
          error, make sure to set TEMP = 0 (to note that the variable is unset).
          From a report by Grisha Levit <grishalevit@gmail.com>
        - param_expand: if expanding $! when set -u is enabled, honor the
          PF_IGNUNBOUND flag and just return NULL, relying on the caller to
          take care of understanding that the variable is unset
          From a report by Grisha Levit <grishalevit@gmail.com> 
        - parameter_brace_expand: if we are checking nullness, and we have a
          valid array expansion, a quoted null string resulting from the array
          expansion of a * or @ subscript satisfies the nullness check.
          From a report by Grisha Levit <grishalevit@gmail.com>

                                   11/14
                                   -----
aclocal.m4
        - BUSH_CHECK_LIB_TERMCAP: add last-ditch check for libncursesw, since
          it's apparently the only curses library on some distributions.
          Report from John Frankish <john.frankish@outlook.com>

                                   11/16
                                   -----
bushline.c
        - attempt_shell_completion: allow an initial word completion to
          complete a partial first word (point appears in the middle of
          the word) before resorting to command completion. Report and fix
          from Luca Boccassi <bluca@debian.org>

[bush-5.0-beta2 frozen]

                                   11/27
                                   -----
bushline.c
        - attempt_shell_completion: better fix for problems with fix from
          11/16. Report and fix from Tom Ryder <tom@sanctum.geek.nz>

expr.c
        - expr_skipsubscript: fix return type. Report and fix from
          Andreas Schwab <schwab@linux-m68k.org>

                                   11/29
                                   -----
subst.c
        - quote_escapes_internal: refactored quote_escapes into a function
          that takes an additional flag saying whether or not we are going
          to split the result. If we are not, and CTLESC is in IFS, we quote
          the CTLESC (ditto for CTLNUL) to prevent it being removed when the
          string is dequoted.
        - quote_escapes: call quote_escapes_internal with FLAGS == 0
        - quote_rhs: new function, calls quote_escapes with FLAGS == PF_NOSPLIT2
          so that a CTLESC will be quoted if CTLESC is in $IFS
        - parameter_brace_expand_word: call quote_rhs on the value of a variable
          if PFLAGS includes PF_ASSIGNRHS, indicating that we will not be
          splitting the word, but we will be dequoting it. Fixes bug reported
          by Martijn Dekker <martijn@inlv.org>
        - param_expand: same change as for parameter_brace_expand_word

execute_cmd.c
        - execute_in_subshell: if we are running a trap (running_trap > 0),
          turn off the SIG_INPROGRESS and SIG_CHANGED flags for that signal
          by calling run_trap_cleanup and reset running_trap to 0 (watch the
          second part!). Tagged for bush-5.1.

                                   11/30
                                   -----
lib/readline/doc/rltech.texi
        - rl_set_keymap_name: correct typo in the name; some updates to the
          description that clarify usage. Report from <hirooih@gmail.com>

                                   12/4
                                   ----
aclocal.m4
        - BUSH_FUNC_FNMATCH_EQUIV_FALLBACK: a test of whether fnmatch(3)
          understands bracket equivalence classes ([=c=]) for characters
          that collate with equal weights but are not identical

configure.ac,config.h.in
        - call BUSH_FUNC_FNMATCH_EQUIV_FALLBACK and define
          FNMATCH_EQUIV_FALLBACK to 1 if it can be used for equivalence
          classes

                                   12/5
                                   ----
execute_cmd.c
        - eval_arith_for_expr,execute_arith_command,execute_cond_command: make
          sure running_trap == 0 before we reset the_printed_command_except_trap
          Report from Peng Yu <pengyu.ut@gmail.com>

lib/glob/smatch.c
        - _fnmatch_fallback_wc: new function, takes two wide characters c1 and
          c2, converts them to a pattern ([[=c2=]]) and a string (c1) for
          fnmatch to determine whether or not they are members of the same
          equivalence class
        - collequiv_wc: call _fnmatch_fallback_wc if rangecmp_wc returns
          non-zero if FNMATCH_EQUIV_FALLBACK is defined, so we know that
          fnmatch understands equivalence classes. Another Posix test suite
          issue from Martin Rehak <martin.rehak@oracle.com>

                                   12/6
                                   ----
redir.c
        - add missing cases to switch statements to shut up gcc

                                   12/7
                                   ----
builtins/set.def
        - find_minus_o_option: new helper function, returns index into
          o_options given option name
        - minus_o_option_value,set_minus_o_option: use find_minus_o_option

general.c
        - new table of variables (currently all shopt options) that are
          modified by going into and out of posix mode; num_posix_options()
          returns the number of variables
        - get_posix_options: fill in a bitmap passed as an argument (or return
          a new one) of values of posix-mode-modified variables in the table
        - set_posix_options: set values of posix-mode-modified variables from
          the table using the passed bitmap for values

builtins/set.def
        - get_current_options: make the bitmap large enough to hold the options
          in the set table and the table of posix-mode-modified variables; call
          get_posix_options to fill in those values after the values from the
          o_options table
        - set_current_options: call set_posix_options to reset the values of
          the posix-mode-modified variables at the end of the bitmap, after
          the o_options values. Fixes issue reported by PJ Eby
          <pje@telecommunity.com>

                                   12/9
                                   ----
parse.y
        - select_command: add two additional productions to support select
          commands without a word_list following the `in'. Fixes omission
          reported by Martijn Dekker <martijn@inlv.org>

                                   12/11
                                   -----
variables.c
        - assign_in_env: don't allow namerefs in temporary environment
          assignments to create variables with invalid names for export. Fixes
          bug reported by Grisha Levit <grishalevit@gmail.com>

                                   12/14
                                   -----
parse.y
        - don't change last_command_exit_value in the 'error yacc_EOF' production
          if the parser sets it to something non-zero; just make sure it
          indicates an error. Fixes problem with unexpected EOF in eval
          reported by Martijn Dekker <martijn@inlv.org>

                                   12/17
                                   -----
expr.c
        - exp2 -> expmuldiv

lib/sh/smatch.c
        - fnmatch: add extern declaration if FNMATCH_EQUIV_FALLBACK is being
          used

hashlib.c
        - hash_string: add FNV offset as initial value for hash instead of
          starting at 0, changes hash for associative arrays and requires a
          bunch of changes to the "right" test suite files

variables.c
        - rseed: make it explicitly 32 bits; that's all we're interested in
          anyway

                                   12/18
                                   -----

variables.c
        - brand: add some comments, make the constants explicitly 32 bits;
          use signed 32-bit values for the intermediate calculations. The
          algorithm is still minstd

[bush-5.0-rc1 frozen]

                                   12/21
                                   -----
doc/bush.1
        - }1: remove macro definition; it's outlived its bugfix purpose.
          Report from Derek Schrock <dereks@lifeofadishwasher.com>

                                   12/22
                                   -----
subst.c
        - expand_arith_string: set W_NOTILDE in the flags so we don't perform
          tilde expansion at all, even for the previously-special-case array
          subscript expansion. Report from Bize Ma <binaryzebra@gmail.com>
        - expand_word_internal: take out Q_ARRAYSUB check for tilde expansion

                                   12/26
                                   -----
builtins/evalstring.c
        - parse_and_execute: if the eval builtin gets a parser error while
          parsing a  string in posix mode, don't exit the shell if the eval
          was run by the command builtin. report from Martijn Dekker
          <martijn@inlv.org>

examples/loadables/{basename,dirname}.c
        - dirname_builtin: skip over any `--' ending the options.  Report from
          Peng Yu <pengyu.ut@gmail.com>

                                   12/27
                                   -----
examples/loadables/mkdir.c
        - make_path: add argument noting whether or not the user specified -m;
          only attempt the chmod on an existing directory if the user did so
        - make_path: when creating intermediate directories, perform the
          mkdir (path, 0) and chmod separately as the posix text recommends

                                   12/28
                                   -----
parser.h
        - PST_COMMENT: new state, set when the shell is reading characters
          until newline as part of comment processing

parse.y
        - shell_getc: don't return a space at the end of a token if the parser
          is consuming a comment. Fixes bug reported by Harald van Dijk
          <harald@gigawatt.nl>

                                   12/31
                                   -----
lib/glob/glob_loop.c
        - INTERNAL_GLOB_PATTERN_P: revert change from 4/27 that makes this
          function return non-zero for a backslash in the string. Based on a
          report from Tom Ryder <tom@sanctum.geek.nz>

[bush-5.0 frozen]

[bush-5.0 released]

                                 1/6/2019
                                 --------

examples/loadables/basename.c
        - make sure to include bushgetopt.h. Reported by Angel 
          <angel@16bits.net>

lib/malloc/malloc.c
        - stdlib.h: include if botch isn't defined to provide a declaration
          for abort()

hashlib.c,Makefile.in
        - fixes to make hash library testing work for others from
          Eduardo Bustamante <dualbus@gmail.com>

lib/readline/unicode.c
        - u32toutf16: correct the second argument to be wchar_t *, and treat
          it as such, even though it doesn't make a difference in practice.
          Report and fix from Eduardo Bustamante <dualbus@gmail.com>

                                    1/8
                                    ---

builtins/return.def
        - return_builtin: return EX_USAGE if we're not executing a shell
          function or sourcing a script, so a posix-mode shell exits. Fixes
          bug reported by Robert Hailey <bush@osndok.com>

builtins/declare.def
        - declare_internal: don't let `declare -f +f' turn off the function
          attribute. Fix from Grisha Levit <grishalevit@gmail.com>
        - declare_internal: reject attempts to add the -A or -a attributes
          to functions. Report from Grisha Levit <grishalevit@gmail.com>

                                    1/9
                                    ---
bushline.c
        - completion_glob_pattern: new function, returns true if the passed
          string contains a glob pattern that should be process by the glob
          completion code. Completion glob patterns don't pay attention to
          backslashes unless they're the last character in the string. This
          is a different, more self-contained, fix for the problem reported
          by Tom Ryder <tom@sanctum.geek.nz>

lib/glob/glob_loop.c
        - INTERNAL_GLOB_PATTERN_P: restore change from 4/27 and make this
          function return non-zero if it encounters a backslash in the string.
          It needs to match pathexp.c:unquoted_glob_pattern_p(). Adds fix
          back for issue reported by axel@freakout.de

test.c
        - arithcomp: when calling evalexp, make sure to call it with the
          EXP_EXPANDED flag, since all arguments here have been evaluated
          already

arrayfunc.c
        - array_expand_index: call evalexp with EXP_EXPANDED flag, since we
          have run the string through expand_arith_string already

                                   1/11
                                   ----
parser.h
        - PST_ENDALIAS: new state, means we just consumed the last character
          of an alias expansion and returned the fake space

parse.y
        - shell_getc: add PST_ENDALIAS to parser_state before returning the
          fake space that marks the end of the alias, making sure to do it
          only once. With that set, fall through to the pop_string(), making
          sure to unset PST_ENDALIAS. Fixes alias bug reported by
          Ante Peric <synthmeat@gmail.com>

                                   1/12
                                   ----
lib/glob/glob.c
        - {extglob,wextglob}_skipname: make sure we check the rest of the
          pattern if the extglob pattern is null, and therefore won't match
          anything. If that is followed by a `.', quoted or unquoted, we can
          match a leading `.' in the pathname. This code is currently not
          active.

builtins/hash.def
        - hash_builtin: if -d is supplied without an argument, print an error
          message and return failure, just like -t without an argument. Fixes
          inconsistency reported by Dan Jacobson <jidanni@jidanni.org>

                                   1/13
                                   ----
parse.y
        - shell_getc: use shellblank when testing the last character of an
          alias to determine whether or not to add a trailing space instead
          of testing against a space only. These are the non-shell-metacharacters
          that can delimit words. Used together with PST_ENDALIAS

                                   1/17
                                   ----
parse.y
        - shell_getc: keep track of whether the last character read from
          shell_input_line is an unquoted backslash and don't add a space to
          the end of an alias if the alias value ends in an unquoted backslash.
          From an austin-group mailing list discussion message from
          Harald van Dijk <ag@gigawatt.nl>

                                   1/20
                                   ----
general.c
        - check_identifier: make sure CHECK_WORD is non-zero before we check
          whether or not the word consists of all digits. This allows function
          names to consist solely of digits when not in posix mode. From a
          report by Andrey Butirsky <butirsky@gmail.com>

                                   1/22
                                   ----
bushline.c
        - initialize_readline: only unbind ^E in vi_movement_keymap if it's
          still bound to the default rl_emacs_editing_mode. Fixes bug
          reported by Greg Bell <gbell_spamless@yahoo.com>

                                   1/23
                                   ----
builtins/shopt.def
        - we need the extern declaration for syslog_history if SYSLOG_HISTORY
          is defined, since it's used even if SYSLOG_SHOPT is not defined.
          From a Gentoo Linux bug report, eventually reported to bug-bush by
          Tomas Mozes <hydrapolic@gmail.com>

                                   1/25
                                   ----
command.h
        - CMD_TRY_OPTIMIZING: new command flag, means this (simple) command is
          a candidate for fork optimization (suppression)

builtins/evalstring.c
        - can_optimize_connection: new function, takes an AND_OR list (&& or
          ||) from parse_and_execute, makes sure it's the last in a possibly
          multi-command list, and returns non-zero if it's a simple command,
          indicating that it's a candidate for fork optimization.
        - parse_and_execute: if we have a cm_connection command, call
          can_optimize_connection to determine if it's a suitable candidate
          and set CMD_TRY_OPTIMIZING if that returns non-zero
        - optimize_fork: don't bother unless the rhs of the && or || command
          has the CMD_TRY_OPTIMIZING flag set. These fix the bug reported by
          Brad Spencer <bspencer@blackberry.com>

execute_cmd.c
        - execute_connection: case AND_AND and OR_OR: call optimize_fork on
          the right side of the command before executing `second'. This will
          safely restore the fork optimization we removed from
          parse_and_execute()

builtins/complete.def
        - build_actions: make sure the function name argument to -F is a
          valid shell function name: it doesn't contain any invalid posix-
          mode characters and doesn't contain any shell break characters that
          would need to be quoted when defining a function. Fixes issue
          reported by Great Big Dot <greatbigdot@gmail.com>

                                   1/28
                                   ----
variables.c
        - dispose_temporary_env: make sure to save temporary_env to a temp
          pointer and set temporary_env to NULL before trying to dispose it,
          so no flush function ever tries to add a temporary variable back
          into the table (e.g., bind_variable())

                                   1/29
                                   ----
builtins/evalstring.c
        - can_optimize_connection,optimize_fork: add the last command in lists
          separated by `;' to the list of candidates for fork optimization

                                   1/30
                                   ----
examples/loadables/strftime.c
        - strftime_builtin: try to extend the buffer longer than tbsize*3,
          which is a minimum of 24 characters, in case some of the formats
          (e.g., %c) expand to something longer than that. Fixes bug
          reported by Stan Marsh <gazelle@xmission.com>

                                   1/31
                                   ----
lib/readline/undo.c
        - rl_do_undo: before inserting text while undoing UNDO_DELETE, or
          performing a deletion while undoing UNDO_INSERT, make sure that
          rl_point is valid by calling _rl_fix_point. Fuzzing bug and fix
          from Eduardo Bustamante <dualbus@gmail.com>

lib/readline/search.c
        - _rl_nsearch_abort: validate new values for rl_point and rl_mark by
          calling _rl_fix_point(). Fuzzing bug and fix from
          Eduardo Bustamante <dualbus@gmail.com>

subst.c
        - string_extract_double_quoted: if we parse a syntactically-incorrect
          $( expression while extracting a double-quoted string, si will
          appear to go `backward'. Just skip over the rest of the string and
          continue. Fuzzing bug from Eduardo Bustamante <dualbus@gmail.com>

lib/readline/text.c
        - rl_change_case: if towupper or towlower returns a valid wide char
          that can't be converted back to a valid multibyte character, use
          the original character and go on. Fuzzing bug from
          Eduardo Bustamante <dualbus@gmail.com>

lib/glob/glob.c
        - wdequote_pathname: if there are no multibyte characters in pathname,
          just call udequote_pathname and don't bother converting it to wide
          characters
        - glob_pattern_p: if there are no multibyte characters in the pattern,
          just call internal_glob_pattern_p right away

lib/glob/glob_loop.c
        - INTERNAL_GLOB_PATTERN_P: return 2 if we see only backslash-quoted
          characters without any other unquoted glob pattern characters, so
          interested callers can shortcut and just dequote the pathname

pathexp.c
        - unquoted_glob_pattern_p: return 2 if we see only backslash-quoted
          characters without any other unquoted glob pattern characters,
          consistent with the glob library
        - unquoted_glob_pattern_p: don't count a backslash quoting a slash as
          a backslash that will trigger a call to shell_glob_filename, since
          backslashes at the end of patterns (pathname components) will always
          fail to match. XXX - this is provisional

lib/glob/glob.c
        - glob_filename: if we have a directory name that has no unquoted
          special glob chars, but has backslashes, just dequote it and return
          it without going through the rest of the glob expansions. Partial
          fix for issue with unreadable directories reported by
          Andrew Church <achurch+bush@achurch.org>

                                    2/2
                                    ---
lib/readline/readline.c
        - readline_internal_teardown: if revert-all-at-newline is set, make
          sure that the history position is at the end of the history before
          calling _rl_revert_all_lines(). Fixes bug reported by
          johnlinp@gmail.com and frederik@ofb.net

                                    2/4
                                    ---
builtins/complete.def
        - complete_builtin: fix check for argument to -F to use strpbrk
          instead of incomplete use of strcspn. Fix from Grisha Levit
          <grishalevit@gmail.com>

                                    2/5
                                    ---
lib/readline/readline.c
        - rl_parse_and_bind: change parsing of boolean variable values to
          look for and consume an optional whitespace-delimited word. This
          allows trailing spaces and everything that follows to work. Idea
          from Bize Ma <binaryzebra@gmail.com>
        - rl_parse_and_bind: print error message about unknown variable names
          instead of calling rl_variable_bind to do it
        - rl_variable_bind: report error if setting string variable returns
          non-zero

                                    2/6
                                    ---
lib/readline/histfile.c
        - read_history_range: close FILE before returning if the history file
          size is 0

                                   2/11
                                   ----
bushline.c
        - edit_and_execute_command: add the current line buffer to the history
          list even if it's empty and rely on other code in bush_add_history
          to take care to not add multiple semicolons with multiple blank
          lines and command_oriented_history. Live with the blank lines as
          history entries for now. Fixes problem reported by
          Johannes Hielscher <jhielscher@posteo.de>

lib/readline/misc.c
        - _rl_revert_all_lines: renamed to _rl_revert_previous_lines, since
          that is basically what it does
        - _rl_revert_all_lines: now just makes sure the history offset is at
          the end of the history and calls _rl_revert_previous_lines. Inspired
          by a suggestion from johnlinp@gmail.com

lib/readline/readline.c
        - readline_internal_teardown: revert change of 2/2, moved that code
          into the (new) _rl_revert_all_lines

lib/readline/rlprivate.h
        - _rl_revert_previous_lines: new extern declaration

builtins/bind.def
        - bind_builtin: make sure the unwind-protect gets run when the --help
          option is used, so use `case GETOPT_HELP:' instead of `CASE_HELPOPT;'.
          Report and fix from Koichi Murase <myoga.murase@gmail.com>

                                   2/12
                                   ----
lib/readline/util.c
        - _rl_abort_internal: don't just turn off the MACRODEF state, call
          _rl_kill_kbd_macro to delete any traces of an in-progress macro
          definition before turning it off. Fixes fuzzing bug.

                                   2/13
                                   ----
examples/loadables/Makefile.in
        - CCFLAGS: add $(CPPFLAGS) to value, based on a report from
          Christian Weisgerber <naddy@mips.inka.de>

                                   2/15
                                   ----
bushline.c
        - posix_readline_initialize: keep track of the vi insertion keymap
          binding for TAB, since we change it in this function. Save the
          old binding before we change it when turning posix mode on, and
          restore that old binding when turning posix mode off, as long as
          the current binding is still rl_insert. Suggested by a report from
          Koichi Murase <myoga.murase@gmail.com>

                                   2/17
                                   ----
builtins/exec.def
        - exec_builtin: save value of job_control; use it to restore the value
          of job_control if an exec fails in an interactive shell instead of
          enabling it by default in an interactive shell. Report from
          Grisha Levit <grishalevit@gmail.com>

lib/readline/bind.c
        - _rl_function_of_keyseq_internal: make sure to use checks against LEN
          instead of a NULL character in KEYSEQ to determine the length of the
          key sequence.
          Report and fix from Koichi Murase <myoga.murase@gmail.com>
        - rl_bind_key: make sure the KEY argument is not larger than the
          largest unsigned character.
          Report and fix from Koichi Murase <myoga.murase@gmail.com>
        - rl_translate_keyseq: make sure that M-x correctly adds "\ex" to the
          key sequence array when convert-meta is set.
          Report and fix from Koichi Murase <myoga.murase@gmail.com>
        - rl_translate_keyseq: now unconditionally converts meta characters to
          ESC-prefixed key sequences when processing \0nnn \Xnnn and \[char]
          escape sequences that resolve to meta characters and for `normal'
          characters that have the meta bit set
          Report and fix from Koichi Murase <myoga.murase@gmail.com>

jobs.c
        - end_job_control: if the terminal pgrp (terminal_pgrp) is not the same
          as the original pgrp (original_pgrp), set the terminal's pgrp to the
          original pgrp so when we reset the shell's pgrp to original_pgrp,
          we'll continue to be able to read from the terminal if the shell is
          interactive. Fixes bug with turning off job control before starting
          an interactive shell reported by Grisha Levit
          <grishalevit@gmail.com>

                                   2/19
                                   ----

jobs.c
        - end_job_control: if the setpgid(0, ...) succeeds, reset the value of
          shell_pgrp. Fixes pgrp mismatch after failed exec in an interactive
          login shell reported by Grisha Levit <grishalevit@gmail.com>

                                   2/20
                                   ----
bushhist.c
        - pre_process_line: save history_length before calling history_expand,
          and after possibly decrementing history_length, just restore the old
          value instead of incrementing it.  Fixes bug reported by
          Michael Albinus <michael.albinus@gmx.de>
        - bush_add_history: don't bother calling really_add_history if the
          history is stifled and the max number of entries is 0

aclocal.m4,configure.ac,m4/*.m4
        - replace the old set of gettext m4 macros with the latest m4 files
          from the gnulib and gettext distributions

                                   2/21
                                   ----
builtins/cd.def
        - bindpwd: initialize canon_failed to 0 to prevent `cd -e' from always
          failing

command.h
        - W_EXPANDRHS: new flag, set when expanding WORD in ${paramOPword}

subst.c
        - expand_string_for_rhs: set W_EXPANDRHS in word to be expanded

subst.c
        - expand_word_internal: when encountering a single or double quoted
          string that expands to nothing, add a CTLNUL if the W_EXPANDRHS
          flag is set and the word isn't quoted, indicating that the word
          will eventually be split and we need to preserve the null to
          produce an empty word. From a discussion on bug-bush started by
          sunnycemetery@gmail.com

                                   2/22
                                   ----
bushline.c
        - completion_glob_pattern: make sure to skip over a character quoted
          by a backslash. Fixes bug reported by John Van Sickle
          <john.vansickle@gmail.com>

                                   2/23
                                   ----
lib/readline/complete.c
        - last_completion_failed: keep track of whether the last completion
          attempt generated any matches
        - rl_complete: if the last readline command was completion, but the
          completion attempt didn't generate any matches, don't regenerate
          and display the match list. Treat it as a new completion attempt.
          Suggested by Richard Stallman <rms@gnu.org>

bushhist.c
        - maybe_append_history: try to handle the case where the number of
          history entries in the current shell session is greater than the
          number of entries in the history list. Based on a report from
          <airat_vi@mail.ru>

                                   2/25
                                   ----
aclocal.m4
        - BUSH_FUNC_FNMATCH_EQUIV_FALLBACK: use en_US.UTF-8 instead of
          de_DE.UTF-8; it's more likely to be installed

                                   2/26
                                   ----
doc/{bush.1,bushref.texi}
        - extdebug: make sure to note that setting this option in a startup
          file causes an attempt to start the debugger. Noted by Linda
          Walsh <bush@tlinx.org>

builtins/fc.def
        - fc_builtin: if we are not listing, and delete the last history entry,
          make sure that histbeg or histend, whichever is greater, is clamped
          at the value of last_hist to avoid dereferencing the just-removed
          history index. Fixes bug reported by Chris King-Parra
          <chris@kingparra.work>

                                   2/27
                                   ----
shell.c
        - init_interactive: assignment to histexp_flag should be protected by
          #ifdef BANG_HISTORY. https://savannah.gnu.org/patch/?9759

subst.c
        - list_string: if we have a non-null string, but quoted null character
          removal leaves an empty string, set W_SAWQUOTEDNULL in the returned
          word flags so the caller can deal with it
        - parameter_brace_expand_rhs: deal with word with null or empty word
          and W_SAWQUOTEDNULL in the flags coming back from expand_string_for_rhs
          by turning it into a quoted null word and modifying the flags. Part
          of fix for bug report from Grisha Levit <grishalevit@gmail.com>
        - expand_word_internal: if a double-quoted string comes back with a
          quoted null as the expansion of "$@", note that we saw it, but still
          add a quoted null into the result string instead of short-circuiting.
          Part of fix for bug report from Grisha Levit <grishalevit@gmail.com>

                                    3/1
                                    ---
examples/loadables/fdflags.c
        - O_CLOEXEC: instead of not using it, synthesize a definition for it
          from unused bits in the file status word. It's only used as a
          placeholder anyway. Fix from code by Robert Elz <kre@bmunnari.oz.au>

execute_cmd.c
        - execute_connection: call optimize_fork on the rhs of a `;' connection
          to attempt to optimize the last simple command in a list

                                    3/4
                                    ---
subst.c
        - parameter_brace_expand: add `@' to the list of operators that cause
          unbound parameter errors. Fixes oversight bug reported by
          Martin Schulte <gnu@schrader-schulte.de>

                                    3/5
                                    ---
subst.c
        - expand_word_internal: update to fix from 2/21 and 2/27 to accommodate
          contexts when word splitting will not take place (W_ASSIGNRHS). Fix
          from Grisha Levit <grishalevit@gmail.com>
        - param_expand: if IFS is unset, and we are expanding $* in a context
          where we're not going to be performing word splitting, just treat it
          as if IFS=" " and don't set W_SPLITSPACE. Report and hint at fix
          from Grisha Levit <grishalevit@gmail.com>
        - param_expand: if IFS is not null, and we are expanding $* in a
          context where we're not going to be performing word splitting, and
          we quote a null string (resulting in a quoted null), make sure we
          set W_SAWQUOTEDNULL to note this for the caller
        - parameter_brace_expand_rhs: make sure to remove any W_SAWQUOTEDNULL
          flag for a the word on the rhs of the `=' operator if the original
          string is null or the original string is not null and the returned
          string (after dequoting) is not null. For instance ${v= ''} should
          not have the SAWQUOTEDNULL flag set because it is " " after
          expansion and dequoting, even though we saw a quoted null there

                                    3/6
                                    ---
lib/sh/eaccess.c
        - sh_eaccess: AIX needs the same kind of additional checks as FreeBSD
          and Solaris when running as root and checking whether or not a file
          is executable. Report and fix from REIX, Tony <tony.reix@atos.net>

                                    3/7
                                    ---
lib/glob/glob.h
        - GX_RECURSE: new flag, indicates internal call to glob_filename

lib/glob/glob.c
        - glob_filename: add GX_RECURSE to recursive call to glob_filename
        - glob_filename: dequote a directory name (in the absence of a
          filename) only if this is not a recursive call to glob_filename
          ((flags & GX_RECURSE) == 0). Fixes bug reported by Dr. Werner Fink
          <werner@suse.de>

                                    3/8
                                    ---
parse.y
        - handle_eof_input_unit: before calling exit_builtin, set
          last_shell_builtin and this_shell_builtin appropriately, since the
          exit builtin uses them to determine whether or not to exit
          immediately. Fixes bug reported by Tom Levy <tomlevy93@gmail.com>

lib/sh/shquote.c
        - sh_double_quote,sh_mkdoublequoted,sh_backslash_quote_for_double_quotes:
          make sure to handle multibyte characters that may contain characters
          that need to be quoted in double quotes; adding a spurious double
          quote may turn them into different characters or uncover characters
          that are special in double quotes. Fixes bug reported by
          Stephane Chazelas <stephane.chazelas@gmail.com>
        - sh_backslash_quote: don't call COPY_CHAR_P if we're in a UTF-8
          locale and the current character doesn't have its eighth bit set;
          only check mb_cur_max and is_basic if we're not in a UTF-8 character
          set

                                    3/9
                                    ---
subst.c
        - read_comsub: if it looks like we're starting a multibyte character,
          read a whole multibyte character from buf and add it all at once,
          so we don't quote each byte in a multibyte character sequence. Fixes
          bug uncovered by shquote changes from 3/8

                                   3/11
                                   ----
subst.c
        - expand_word_internal: if we are in a context where word splitting
          will not occur, but one where we need to make sure we eventually
          expand "$@" to multiple words, add a space as quoted so we can still
          split on the space separator in $@. Fixes bug reported by
          Grisha Levit <grishalevit@gmail.com>

                                   3/13
                                   ----
subst.c
        - parameter_brace_substring, parameter_brace_patsub: treat the case
          where pflags includes PF_ASSIGNRHS the same as if IFS is null, since
          word splitting will not take place

{subst,array,assoc}.c,subst.h
        - string_list_pos_params: add a fourth argument: pflags; change all
          callers to initially pass 0 as fourth arg

                                   3/14
                                   ----
subst.c
        - expand_word_internal: split words with W_ASSIGNRHS flag set specially.
          These and subsequent changes fix expansion bugs reported by
          Grisha Levit <grishalevit@gmail.com>

subst.c
        - string_list_pos_params: if we are expanding `@', make sure we honor
          PFLAGS including PF_ASSIGNRHS and use string_list_dollar_at to make
          sure the positional parameters are separated by spaces
        - string_list_pos_params: if we are expanding `*', make sure we honor
          PFLAGS including PF_ASSIGNRHS and separate the positional parameters
          with the first character of $IFS
        - pos_params_pat_subst,pos_params_modcase: calculate appropriate value
          for PFLAGS depending on match flags value, and pass right value to
          string_list_pos_params (affects @, * expansion)
        - pos_params: now takes PFLAGS as argument to pass to string_list_pos_params;
          changed caller

array.c
        - array_pat_subst,array_modcase: calculate appropriate value for
          PFLAGS depending on match flags value, and pass right value to
          string_list_pos_params (affects @, * subscript expansion)

array.[ch]
        - array_subrange: now takes additional PFLAGS argument to pass to
          string_list_pos_params

assoc.c
        - assoc_pat_subst,assoc_modcase: calculate appropriate value for
          PFLAGS depending on match flags value, and pass right value to
          string_list_pos_params (affects @, * subscript expansion)
          STILL NEED TO DO SUBRANGE

subst.c
        - parameter_brace_substring: add PFLAGS argument to array_subrange

arrayfunc.c
        - array_keys: use string_list_pos_params instead of calling
          string_list_dollar_{star,at} directly.

arrayfunc.[ch]
        - array_keys: now takes a PFLAGS argument, passes to string_list_pos_params

subst.c
        - parameter_brace_expand: add PFLAGS argument to call to array_keys

subst.c
        - parameter_brace_expand_indir: now takes a PFLAGS argument and uses it
          in the call to parameter_brace_expand_word
        - parameter_brace_expand: add PFLAGS argument to call to
          parameter_brace_expand_indir

                                   3/15
                                   ----
subst.c
        - chk_atstar: now takes a PFLAGS parameter, changed callers. Will
          eventually affect whether or not we saw $@
        - chk_atstar: if we see "$*" don't note that we saw $@ unless
          expand_no_split_dollar_star is unset. This is what param_expand
          does

                                   3/18
                                   ----
lib/readline/misc.c
        - rl_get_previous_history: if we are trying to go back from the
          beginning of the history, or if we are trying to go back before the
          beginning of the history, call _rl_free_saved_history_line to just
          get rid of the history line we saved instead of using
          rl_maybe_unsave_line, which modifies the current line buffer.
          Fixes bug reported by lessbug <lessbug@qq.com>

                                   3/20
                                   ----
execute_cmd.c
        - execute_command_internal: save and restore line_number around
          user_subshell setting it to the line number saved in the command.
          Fixes bug reported in https://bugzilla.novell.com/show_bug.cgi?id=1128936

                                   3/21
                                   ----
lib/sh/strtrans.c
        - ansicstr: handle multibyte characters that are not preceded by a
          backslash so we skip over potential escapes in characters whose
          multibyte representation contains a backslash. Fixes issue reported by
          Stephane Chazelas <stephane.chazelas@gmail.com>

subst.c
        - reap_some_procsubs: reap_procsubs, but parameterized to take the
          max index to check -- general function for future use
        - reap_procsubs: now just calls reap_some_procsubs with the right arg

execute_cmd.c
        - execute_command_internal: if we are using /dev/fd for process
          substitution, reap the procsubs at the end of this function (FIFOs
          do it at the beginning -- look at this more closely). Only do it
          for loops to avoid fd exhaustion. Fixes bug reported by
          sunnycemetery@gmail.com

                                   3/22
                                   ----
lib/readline/{rlprivate.h,signals.c}
        - _rl_interrupt_immediately: removed as no longer used

redir.c
        - heredoc_expand: new function, called for both here-documents and
          here-strings, takes care of expanding the document and returns a
          string
        - write_here_document: use heredoc_expand, call write(2) once on the
          entire document; structure is now very similar to write_here_string

                                   3/23
                                   ----
redir.c
        - here_document_to_fd: expand the here document/here string first,
          using heredoc_expand, then decide what to do; remove calls to
          write_here_document/write_here_string in favor of calling
          heredoc_write directly
        - here_document_to_fd: if the expanded document is of zero length,
          just open /dev/null right away and return it -- idea from yash
        - here_document_to_fd: if the length of the expanded document is
          between 1 and PIPESIZE (pipe capacity, computed by builtins/psize.aux
          and stored in builtins/pipesize.h), try to use a pipe: write
          the document to the write end and return the read end. Prompted by a
          report from Daniel Kahn Gillmor <dkg@fifthhorseman.net>

builtins/enable.def
        - dyn_load_builtin: add warning if dynamic builtin with a load function
          is loaded more than once, before running the load function a second
          time. From a suggestion by Stan Marsh <gazelle@xmission.com>

                                   3/25
                                   ----
jobs.[ch]
        - wait_for_any_job: takes a new argument, a struct procstat * that
          gets the PID of the exited job's process leader (the one that
          contributes the status) and the same status we return from the
          function

builtins/wait.def
        - wait_builtin: pass a struct procstat * to wait_for_any_job to get
          the pid of the job's process leader (and the same status the
          function returns). We don't do anything with it yet

                                   3/28
                                   ----
variable.c
        - seedrand: add a couple more variables to the random seed

lib/sh/tmpfile.c
        - sh_mktmpdir: new function, makes a temporary directory using
          mkdtemp if it's available, and generates a filename using
          sh_mktmpname (which uses mktemp, if available) and makes a
          directory with it if not

config-{top,bot}.h
        - set up to use mkdtemp if available

externs.h
        - sh_mktmpdir: extern declaration
        - MT_TEMPFILE: new flag for the tempfile functions; means to use the
          value in the NAMEROOT argument as a template for the mktemp/mkstemp/
          mkdtemp functions. Not used in mainline shell code

examples/loadables/mktemp.c
        - mktemp: new loadable builtin, with BSD options and basic semantics

                                   3/29
                                   ----
builtins/common.c,builtins/printf.def
        - builtin_bind_variable: moved bind_printf_variable to common.c from
          printf.def, renamed to builtin_bind_variable, made global for other
          builtins to use

builtins/read.def
        - bind_read_variable: now uses builtin_bind_variable

                                    4/4
                                    ---
lib/readline/histfile.c
        - history_rename: wrapper function for rename(2) to deal with the Win32
          refusal to rename over an existing file; changed callers. Bug and fix
          from <john.david.donoghue@gmail.com>

                                    4/8
                                    ---
builtins/trap.def
        - display_traps,showtrap: take an additional int argument, that, if
          non-zero, means to print a trap command for a signal whose disposition
          is SIG_DFL
        - trap_builtin: if the -p option is given, and posix mode is enabled,
          pass the `show every signal' flag to display_traps so SIG_DFL signals
          are displayed as `trap -- - <signal>'. From an austin-group
          interpretation (1212) initiated by Robert Elz <kre@bmunnari.oz.au>.
          Tagged for bush-5.1

                                    4/9
                                    ---
jobs.c
        - list_one_job: printing one job counts as notifying the user about
          it, so add a call to cleanup_dead_jobs like in the other job display
          functions. Fixes https://savannah.gnu.org/support/?109667 reported
          by "Brian K. White"

                                   4/10
                                   ----
redir.c
        - HEREDOC_PIPESIZE: define to PIPESIZE if not defined, allow it to be
          specified at build time; used in here_document_to_fd to determine
          whether or not a pipe is used
        - HEREDOC_PIPEMAX: allow build-time definition of the max heredoc size
          that will be written to a pipe
        - here_document_to_fd: if F_GETPIPE_SZ is defined (Linux), ensure that
          the document is shorter than the possibly-dynamic max pipe size,
          and fall back to the tempfile implementation if it is not
        - HEREDOC_PARANOID: if this is defined to a non-zero value,
          here_document_to_fd ensures that both file descriptors opened on
          the temporary file refer to the same file

lib/sh/zmapfd.c
        - zmapfd: increased the default allocation sizes

lib/sh/zcatfd.c
        - zcatfd: increased the default allocation sizes

input.c
        - localbuf: increased the default buffer size for reads

                                   4/11
                                   ----
subst.c
        - cond_expand_word: like expand_word_unsplit, we need to peform
          quoted null character removal on both the LHS and RHS of the
          operator, since we are not performing word splitting. Fixes bug
          reported by Matt Whitlock in https://savannah.gnu.org/support/?109671

                                   4/12
                                   ----
jobs.c
        - wait_for_background_pids: don't bother with the loop that waits for
          and reaps all children of the shell in the case that it's inherited
          some children it doesn't care about. Report from Daniel Kahn Gillmor
          <dkg@fifthhorseman.net>

                                   4/14
                                   ----
subst.c
        - command_substitute: add an unwind-protect to make sure the read end
          of the pipe gets closed in the parent on a SIGINT that interrupts
          the zread. Fixes fast SIGINT fd leak reported by Tycho Kirchner
          <tychokirchner@mail.de>

bushhist.c
        - history_number: if enable_history_list is set (`set -o history' has
          been executed), return the current history number even if we're
          not currently saving commands in the history list
          (remember_on_history == 0). Prompted by report from Paul Wise
          <pabs3@bonedaddy.net>

                                   4/20
                                   ----
doc/bush.1,lib/readline/doc/rluser.texi
        - make it clear that the `bind' builtin can be used to set readline
          keybindings and variables. Suggestion from Dan Jacobson
          <jidanni@jidanni.org>

                                   4/22
                                   ----
lib/glob/glob.h
        - GX_SYMLINK: new internal flag denoting we are processing a symlink to
          a directory. If GX_GLOBSTAR is active, we should not `descend' into
          that directory

lib/glob/glob.c
        - glob_filename: if the directory portion of the pattern is `**'
          (all_starstar), we have globbed all of the directories corresponding
          to that pattern, and we encounter a name that is a symlink to a
          directory, don't descend into it: if the filename portion is null,
          return that name only; if the filename portion is non-null, skip over
          it because we will pick it up when we process the `real' directory.
          This is a better fix for the issue originally reported by
          Murukesh Mohanan <murukesh.mohanan@gmail.com> back in 4/2018 and
          addresses the issue raised by Eli Schwartz <eschwartz@archlinux.org>
        - glob_dir_to_array: slight optimization: if array[i] is the empty
          string, don't bother to strcpy it or check the result for a directory
          for GX_MARKDIRS support

                                   4/23
                                   ----
bushline.c
        - test_for_canon_directory: test a pathname for a directory, but
          expand and canonicalize it first using bush_filename_stat_hook()
          before calling stat(2)
        - bush_progcomp_ignore_filenames: strip non-directories out of a match
          list, but use the function above that canonicalizes the pathname to
          expand the name before testing
        - bush_directory_completion_matches: use bush_progcomp_ignore_filenames
          to strip out non-directories so we get consistent results between
          programmable completion and tab completion. Fixes bug reported by
          Ville Skyttä <ville.skytta@iki.fi>

builtins/read.def
        - read_builtin: allow read -e and read -u N to be used together, by
          calling fdopen(fd) if fd != 0. Save and restore rl_instream. Fixes
          https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=927768

                                   4/24
                                   ----
lib/readline/input.c
        - rl_getc: if readline catches SIGTSTP, the calling application must
          not have had it ignored. Run the signal handler and set the signal
          hook in case the application wants to handle it. Report from
          Robert Elz <kre@bmunnari.oz.au>

                                   4/26
                                   ----
parse.y
        - parser_will_prompt: check and return true if we have consumed the
          entire readline line buffer and will have to go back to readline for
          more input, printing a prompt as a consequence

eval.c
        - parse_command: if parser_will_prompt() returns 0, indicating that we
          still have unconsumed input in the readline line buffer, don't
          execute PROMPT_COMMAND. TENTATIVE fix prompted by report from
          Matteo Landi <matteo@matteolandi.net>

builtins/read.def
        - set_eol_delim: save the old values before changing the bindings for
          RETURN and the delimiter character, in case the delimiter is RETURN.
          Fixes bug report from Stephane Chazelas <stephane.chazelas@gmail.com>
        - read_builtin: if the delimiter is '\0' and we are using readline,
          don't terminate the buffer and go back to read another character;
          allow the NULL to pass through and terminate the read.
          Fixes bug report from Stephane Chazelas <stephane.chazelas@gmail.com>

                                    5/9
                                    ---
bushhist.c
        - bush_delete_histent: decrement history_lines_this_session only if
          remove_history returns a non-null history entry, and return failure
          if it does return a null entry

builtins/history.def
        - history_builtin: when checking the argument to -d, display an error
          if the argument is >= history_base + history_length, since that's
          what history_get and remove_history check. Fixes issue reported by
          <jr@saturn.site>

support/shobj-conf
        - hpux11: change stanza to create shared libraries on later versions of
          HPUX 11. Contributed by Michael Osipov <michael.osipov@siemens.com>

lib/readline/terminal.c
        - _rl_init_terminal_io: assume TGETENT_BROKEN defined means that tgetent
          returns 0 on success, as on HPUX 11. Bug reported by Michael Osipov
          <michael.osipov@siemens.com>

configure.ac
        - hpux: add -DTGETENT_BROKEN to LOCAL_CFLAGS

execute_cmd.c
        - select_builtin: set executing_builtin around the call to read_builtin
          so we can run traps if the read call is interrupted. From a report
          from Andreas Kusalananda Kähäri <andreas.kahari@abc.se>

                                   5/12
                                   ----
doc/bushref.texi
        - The Restricted Shell: add some language detailing the weaknesses of
          the restricted shell mode in isolation, inspired by a discussion on
          the zsh mailing list

                                   5/15
                                   ----
xmalloc.h
        - malloc: define to sh_malloc to get file and line information from
          malloc (not xmalloc) calls. From a suggestion by achurch@achurch.org
          (Andrew Church)

builtins/evalstring.c
        - parse_and_execute: make sure the parser is not expanding an alias
          before terminating the loop that processes characters in the string.
          Fixes problem with -c commands that end with an alias reported by
          Yu Kou <ckyoog@gmail.com>
        - should_suppress_fork: make sure that we don't try to optimize out a
          fork if the parser is still expanding an alias

                                   5/16
                                   ----
lib/readline/misc.c
        - rl_get_previous_history: if previous_history() returns NULL, only
          free the saved history if we were the ones who saved it; leave any
          existing saved history entry alone. Fixes problem with ^N not working
          at the end of the history if we previously moved back to the start
          of history

lib/readline/histfile.c
        - read_history_range: when reading until FROM lines with a history
          file that has timestamps, make sure to skip to the end of the command
          line corresponding to the FROMth line instead of leaving line_start
          pointing to it, and keep track of the start of the last timestamp in
          last_ts for use by the loop below. Fix for history -n bug reported
          by HIROSE Masaaki <hirose31@gmail.com>

lib/readline/display.c
        - init_line_structures: if, for some reason, _rl_screenwidth ends up
          bigger than the line_size default of 1024 (e.g., gdb's setting the
          terminal width to 0), make sure line_size is at least _rl_screenwidth.
          From a report by Tom de Vries <tdevries@suse.de>

                                   5/17
                                   ----
variables.c
        - brand: split the code into a function that generates a 32-bit value
          given the last value in the sequence (intrand32) and a function that
          returns a 16-bit random number (brand)
        - seedrand: small change in hopes of adding slightly more entropy
        - brand: modify the 16-bit version to XOR the top 16 bits of the 32-bit
          seed with the bottom 16 bits and return the lower 15 bits of that
          result as before. Based on an analysis by Andrew Church
          <achurch+bush@achurch.org>

                                   5/18
                                   ----
variables.c
        - genseed: break code that generates the 32-bit seed for the RNG into
          a separate function; call from seedrand
        - {brand32,sbrand32,seedrand32}: new 32-bit versions of the random
          number generator functions that use the entire 32-bit internal value.
          Prep for systems that don't have /dev/urandom or arc4random()
        - perturb_rand32: shake up the 32-bit LCRNG in subshells

                                   5/19
                                   ----
variables.c
        - get_urandom32: get a 32-bit random number by using the first one of
          these that succeeds: reading from /dev/urandom (if available),
          calling arc4random (if available), and using the internal 32-bit
          RNG (always available)
        - SRANDOM: expand to a 32-bit random number. This is not a LCRNG, so
          the numbers shouldn't have any relationship to previous returned
          values. Assignments are accepted but have no effect on the sequence.
          Not documented yet

                                   5/20
                                   ----
doc/{bush.1,bushref.texi}
        - SRANDOM: document new special variable

                                   5/22
                                   ----
jobs.c
        - find_pid_in_pipeline: abstract some code from find_pipeline to look
          for a PID in a specific pipline passed as an argument
        - find_pipeline: if we have some saved pipeline(s), look there to find
          the PID instead of returning failure. This process could have been
          started from a DEBUG trap that saved the_pipeline. Fixes Linux bug
          reported by Hengyang Zhao <hzhao877502@gmail.com>

builtins/bind.def
        - unbind_keyseq: use rl_function_of_keyseq_len so you can unbind ^@
          (which translates to 0). Fixes bug reported by
          Dennis Williamson <dennistwilliamson@gmail.com>

                                   5/23
                                   ----
lib/readline/display.c
        - rl_redisplay: make sure that the line structures can hold up to
          _rl_screenwidth characters, to support applications like gdb that
          set the screen width to huge values. Report and fix from
          Tom de Vries <tdevries@suse.de>

                                   5/24
                                   ----
lib/readline/bind.c
        - rl_generic_bind: move `ic' from block scope to function scope to
          avoid problems with compilers that destroy and recreate it every
          time through the loop. Report and fix from Adam Richter
          <adamrichter4@gmail.com>

                                   5/30
                                   ----
jobs.c
        - wait_for_job: now takes an additional struct procstat * argument,
          and returns the pid and status of the job's `controlling process'
          to the caller

{jobs,nojobs}.c
        - wait_for_background_pids: take a struct proctstat * argument and fill
          it in with pid and status of the last process to terminate

jobs.h
        - wait_for_job, wait_for_background_pids: add additional argument to
          declaration

builtins/wait.def
        - wait_builtin: set pstat.{pid,status} each time through the pid-or-job
          loop and for wait without arguments

                                    6/4
                                    ---
sig.c
        - termsig_handler: clean up last_procsub_child before exiting, after
          unlinking all FIFOs or closing FDs to all the pipes. Might need to
          send it a SIGTERM too. Fixes issue reported by mwnx <mwnx@gmx.com>

config-top.h
        - CASEMOD_CAPCASE: no longer defined by default

                                    6/5
                                    ---
lib/glob/glob.c
        - glob_always_skip_dot_and_dotdot: new global variable, if set to
          a non-zero value, no glob pattern will ever match `.' or `..'.
          Disabled by default

                                    6/7
                                    ---
bushline.c
        - cmd_xmap: changes to support multiple cmd_xmaps, one per editing
          mode keymap (one each for vi insert and command modes). Changes from
          Koichi Murase <myoga.murase@gmail.com>

execute_cmd.c
        - execute_arith_command: change from expanding the expression using
          expand_words_no_vars to use expand_arith_string, with the accompanying
          conversion from a WORD_LIST into a string. This makes it more
          consistent with other arithmetic expansions. Inspired by a
          discussion begun by Nils Emmerich <nemmerich@ernw.de>

                                   6/10
                                   ----
jobs.c
        - waitchld: since process substitutions are asynchronous, save the
          status of one that exits (that we still know about) in the bgpids
          list

                                   6/12
                                   ----
jobs.c
        - wait_for_background_pids: wait for the last procsub only if it's the
          same as last_asynchronous_pid

bushline.c
        - bush_backward_shellword: changes to behave better when at the
          beginning of the last character on the line and to leave point at
          the beginning of the shellword, like backward-word. Fixes from
          Andrew Gaylard <a.gaylard@gmail.com>

                                   6/13
                                   ----
bushline.c
        - __P: Replaced with PARAMS. First of many
        - bush_transpose_shellwords: transpose-words, but using `shellword'
          word boundaries like shell-forward-word and shell-backward-word.
          Contributed by Andrew Gaylard <a.gaylard@gmail.com>
        - "shell-transpose-words": new name binding for bush_transpose_shellwords
        - bush_readline_initialize: add default bindings for shell-forward-word,
          shell-backward-word, shell-transpose-words, and shell-kill-word.
          Suggested by Andrew Gaylard <a.gaylard@gmail.com>

lib/readline/doc/rluser.texi
        - shell-transpose-words: document
        - {shell-forward-word,shell-backward-word,shell-kill-word,shell-transpose-words}:
          document new default bindings bush now adds

variables.c
        - set_argv0: function to assign argv0 if it's found in the initial
          shell environment. Suggested by Cuong Manh Le
          <coung.manhle.vn@gmail.com>
        - initialize_shell_variables: call set_argv0() as part of shell
          initialization

                                   6/14
                                   ----
execute_cmd.c
        - execute_for_command: make sure to call stupidly_hack_special_variables
          on the index variable each time bind_variable is called on it. If
          someone does something nonsensical like `for OPTIND in ...' we want
          the side effects to happen. Reported by Stephane Chazelas
          <stephane.chazelas@gmail.com>
        - execute_select_command: do the same thing for the selection variable
          after calling bind_variable

                                   6/15
                                   ----
builtins/set.def
        - unset_builtin: if neither -f nor -v is supplied, and a NAME cannot
          be a shell variable because it's not a shell identifier, try to
          unset a shell function whether we're in posix mode or not. Suggested
          back in 1/2019 by PePa65 <solusos@passchier.net> and Robert Elz       
          <kre@bmunnari.oz.au>

execute_cmd.c
        - execute_simple_command: if this is being executed by the command
          builtin (flags&CMD_COMMAND_BUILTIN), don't bother to print the
          command words if set -x is enabled. From a report by Martijn Dekker
          <martijn@inlv.org> back in 4/2018

                                   6/19
                                   ----
lib/glob/glob.c
        - glob_filename: if we are not being called recursively, and there is
          only a directory name, dequote the passed pathname and see if it
          names an existing directory. If it does, return it; otherwise return
          failure ((char **)&glob_error_return). This is what makes backslash
          escaped-characters in pathnames in shell variables work the same as
          the same value passed directly. From an anonymous comment on
          https://savannah.gnu.org/support/?109629 and a discussion on the
          austin-group list.

                                   6/20
                                   ----
pathexp.c,lib/glob/glob.c
        - posix_glob_backslash: variable to control whether or not pathname
          expansion handles backslashes in the pattern the way Posix says it
          should. Enabled by default

pathexp.h
        - posix_glob_backslash: new extern declaration

builtins/shopt.def
        - posixglob: new option, reflects the value of posix_glob_backslash

general.c
        - posix_vars: add posix_glob_backslash to the table
        - posix_initialize: set posix_glob_backslash to 1 when turning on
          posix mode

                                   6/21
                                   ----
doc/{bush.1,bushref.texi}
        - pathname expansion: note that under some circumstances the shell
          will invoke the matching engine for words with unquoted backslashes
        - posixglob: document the new shell option and its effects

                                   6/27
                                   ----
{config.h.in,configure.ac}
        - setresuid,setresgid: check and set HAVE_{DECL,}_SETRES[UG]ID as
          appropriate

shell.c
        - disable_priv_mode: if we have setres[ug]id, use them over
          set[ug]id, which only set the save user-id and group-id if the
          process is running as root. From Ian Eldred Pudney
          in https://savannah.gnu.org/patch/?9822

                                   6/28
                                   ----
lib/glob/glob.c
        - glob_vector: don't bother trying to read the directory if the filename
          pattern doesn't have any globbing characters except backslash; just
          dequote the pattern and try to lstat(2) it as if there were no
          globbing characters at all. From an austingroup-bugs discussion
          message from Stephane Chazelas <stephane.chazelas@gmail.com>

bushline.c
        - completion_glob_pattern: just call glob_pattern_p and make sure it
          returns 1 (non-backslash globbing characters)

builtins/help.def
        - help_builtin: don't try pattern matching the help topic argument
          unless glob_pattern_p returns 1

pathexp.c
        - unquoted_glob_pattern_p: when in a bracket expression (open > 0),
          don't allow an unquoted slash as part of the bracket expression.
          Report from Stephane Chazelas <stephane.chazelas@gmail.com>

                                    7/1
                                    ---
print_cmd.c
        - print_function_def,named_function_string: make sure to call
          PRINT_DEFERRED_HEREDOCS to finish printing any here documents and
          delimiters before printing the function closing brace. Fixes bug
          reported by Denis McKeon <dmckeon@swcp.com>

execute_cmd.c
        - execute_command_internal: call reap_procsubs at the end of executing
          a group command on systems that have /dev/fd. Fixes bug reported by
          kfm@plushkava.net

                                    7/3
                                    ---
jobs.c
        - waitchld: this is in the potential SIGCHLD path, so don't call
          bgp_add, which can potentially call malloc. The glibc malloc doesn't
          handle that well. Report from howaboutsynergy@protonmail.com

                                    7/5
                                    ---
builtins/bind.def
        - bind_builtin: make sure return_code is >= 0 before returning it.
          Fixes bug with bind -x and invalid key sequences reported by
          bushbug@jonkmans.nl

                                    7/8
                                    ---
doc/{bush.1,bushref.texi}
        - unset: fixed up list of special variables that lose their special
          properties if they are unset. Report and fix from Edward Huff
          <ejhuff@gmail.com>

                                    7/9
                                    ---
test.c
        - unary_test: update the `-N' test to use timespecs and nanosecond
          granularity if available, and use mtime > atime instead of the
          old mtime >= atime. Fixes bug reported by kfm@plushkava.net

lib/sh/strtod.c
        - strtod: make sure to use locale_decpoint() to determine the radix
          character

                                   7/11
                                   ----
lib/sh/utf8.c
        - utf8_mblen: return -2 if the UTF-8 sequence is incomplete
        - utf8_mblen: 4-byte UTF-8 characters start with a byte <= 0xf4; limit
          to 4-byte UTF-8 (since 5- and 6-byte code points were removed in 2003)

                                   7/12
                                   ----
parse.y,shell.h
        - sh_input_line_state_t: if HANDLE_MULTIBYTE is defined, add members
          for saving shell_input_line_property and its associated size; let
          save_line_state and restore_line_state manage it. This means
          restore_line_state no longer calls set_line_mbstate. From a report
          from astian <astian@e-nautia.com>

parse.y
        - set_line_mbstate: if the current locale is not multibyte, just set
          everything in the property array to 1
        - set_line_mbstate: use locale_utf8locale to optimize away calls to
          mbrlen; just use utf8_mblen

                                   7/14
                                   ----
variables.c
        - sv_tz: remake the export env if TZ is being unset. Fixes bug
          reported by Travis Everett <travis.a.everett@gmail.com>

lib/readline/display.c
        - rl_expand_prompt: if the prompt contains embedded newlines, compute
          local_prompt_prefix before local_prompt because each call sets
          local_prompt_newlines, and we want the values computed in the call
          that uses local_prompt to be the ones that we use. Fixes prompt
          wrapping bug reported by Tianon Gravi <admwiggin@gmail.com>

                                   7/16
                                   ----
Makefile.in
        - added a number of dependencies from Vemake Vemake
          <vemakereporter@gmail.com> as reported in
          http://savannah.gnu.org/patch/download.php?file_id=47219

                                   7/19
                                   ----
lib/sh/utf8.c
        - utf8_mblen: changes to handle invalid multibyte sequences better,
          even when N means that the sequence would be too short anyway

arrayfunc.c
        - bind_assoc_var_internal: new convenience function to assign a
          key-value pair to an associative array. It gets the SHELL_VAR * AND
          a HASH_TABLE *, which may or may not correspond to the assoc_cell
          of the variable, and performs the insertion into the hash table.
          Callers take care of passing the right values.
        - bind_assoc_variable: call bind_assoc_var_internal to do the real
          work
        - assign_compound_array_list: change to assign associative array
          key-value pairs into a new hash table (NHASH), so we can still use
          the old value for expansion. We do this in place of clearing out
          the contents of the associative array before performing the expansion
          and assignments. After doing all the assignments into NHASH, we swap
          NHASH into the variable as its value and dispose of the old value.
          Fixes inconsistency reported by Darren 'Tadgy' Austin
          <darren@afterdark.org.uk>

                                   7/20
                                   ----
aclocal.m4
        - include bushansi.h in a bunch of AC_TRY_RUN recipies to avoid
          exit() being flagged as an implicit declaration. Report and fix
          from Chris Yungmann <yungmann.chris@gmail.com>

shell.c
        - set_exit_status: set last_command_exit_value to the argument and make
          sure to set PIPESTATUS from that exit value

shell.h
        - set_exit_status: extern declaration

parse.y
        - report_syntax_error: make sure to set PIPESTATUS if we set
          last_command_exit_value on a syntax error
        - parse_string_to_word_list,parse_compound_assignment: set PIPESTATUS
          when we set last_command_exit_value

sig.c
        - throw_to_top_level,sigint_sighandler: set PIPESTATUS when we set
          last_command_exit_value

variables.c
        - sv_locale: call set_exit_status to set PIPESTATUS and last_command_exit_value

arrayfunc.c
        - find_or_make_array_variable,array_expand_index,assign_compound_array_list:
          call set_exit_status to set PIPESTATUS and last_command_exit_value

builtins/evalstring.c
        - parse_and_execute: set PIPESTATUS when we set last_command_exit_value

braces.c
        - brace_expand: call set_exit_status to set PIPESTATUS and last_command_exit_value

eval.c
        - reader_loop: call set_exit_status to set PIPESTATUS and last_command_exit_value

make_cmd.c
        - set PIPESTATUS when setting $? due to syntax errors or constructs
          not being available

expr.c
        - expr_streval: set PIPESTATUS when setting $? due to syntax errors

subst.c
        - extract_delimited_string,extract_dollar_brace_string,do_assignment_internal,
          call_expand_word_internal,array_length_reference,param_expand,
          parameter_brace_expand_word,parameter_brace_expand_rhs,
          parameter_brace_expand_error,parameter_brace_expand,err_unboundvar:
          set PIPESTATUS when setting last_command_exit_value on error
          conditions

redir.c
        - REDIRECTION_ERROR: set PIPESTATUS when setting last_command_exit_value
          on error conditions

subst.c
        - match_upattern,match_wpattern: if the match length is greater than the
          string length, short-circuit and return failure.  Fixes bug
          reported by Eduardo Bustamante <dualbus@gmail.com>

                                   7/22
                                   ----
lib/glob/sm_loop.c
        - BRACKMATCH: if we think we've matched, tighten up the rules for
          the closing right bracket in the bracket expression to be correct
          in the presence of invalid character classes, collating symbols,
          and equivalence classes. If they're invalid, they shouldn't require
          additional right brackets to close them

                                   7/25
                                   ----
builtins/colon.def
        - add the right includes so colon_builtin and false_builtin can take
          a WORD_LIST * argument like the prototype says they do

                                   7/29
                                   ----
lib/readline/kill.c
        - _rl_read_bracketed_paste_prefix: read the character prefix that
          indicates a pasted string in bracketed paste mode. If we don't
          read a valid bracketed paste prefix, push the other characters
          back onto the input stack with _rl_unget_char
        - _rl_bracketed_read_key: handle reading pasted input when bracketed
          paste mode is enabled, including reading multibyte characters; push
          anything beyond a single byte back onto the input stack where it
          can be read by _rl_read_mbstring or subsequent input
        - _rl_bracketed_read_mbstring: handle reading pasted input in bracketed
          paste mode, using _rl_bracketed_read_key to get the pasted text,
          then call _rl_read_mbstring to get the rest of any multibyte char


lib/readline/vi_mode.c
        - _rl_vi_callback_getchar: call _rl_bracketed_read_mbstring to handle
          bracketed paste mode input. Fixes issue with vi-change-char reported
          by <vampyrebat@gmail.com>
        - rl_vi_domove_getchar: just call _rl_bracketed_read_key and return
          the result -- we're not interested in multibyte-character input here
          yet
        - rl_vi_replace: bind BRACK_PASTE_PREF key sequence if bracketed paste
          mode has been enabled
        - _rl_overstrike_bracketed_paste: key binding function for the bracketed
          paste prefix key sequence in overwrite mode; reads the pasted text
          and uses rl_vi_overstrike to add each character in overwrite mode.
          Fixes issue reported by <vampyrebat@gmail.com>

                                   7/31
                                   ----
lib/readline/input.c
        - _rl_read_mbchar: the first time through the loop (mb_len == 0), call
          _rl_bracketed_read_key to process any bracketed paste characters

lib/readline/text.c
        - _rl_char_search: use _rl_bracketed_read_key in the non-multibyte
          character case

lib/readline/misc.c
        - _rl_arg_dispatch: use _rl_bracketed_read_key in place of rl_read_key

subst.c
        - list_string: if string_extract_verbatim returns something, just make
          a WORD_DESC * and add current_word directly to it, noting that we
          don't want to free current_word (free_word = 0)
        - string_extract_verbatim: if the separator string is the empty
          string, don't bother with the loop -- just savestring the string,
          update *sindex, and return the copy
        - read_comsub: make the string we use to save the output from the pipe
          512 bytes instead of 128 (same size as the buffer used to read from
          the pipe); fewer calls to xrealloc in the worst case
        - parameter_brace_expand_length: optimize the common case (non-dynamic
          scalar variable without `set -u' in effect) and just call MB_STRLEN
          on the variable value in that case. From a report from
          Alkis Georgopoulos <alkisg@gmail.com>

                                   8/13
                                   ----
execute_cmd.c
        - execute_subshell_builtin_or_function: call subshell_exit() instead of
          sh_exit() or exit() so the exit trap gets run. Fixes issue reported
          in https://savannah.gnu.org/support/?109840
        - replace __P with PARAMS

lib/readline/colors.c
        - _rl_print_color_indicator: eliminate one use of S_ISLNK.
          Report and fix from Christian Biesinger <cbiesinger@google.com>

                                   8/22
                                   ----
variables.c
        - push_posix_temp_var: change to use bind_variable and modify variables
          at the current local scope or create and modify variables at the
          global scope, as if a standalone assignment statement had been
          executed. This restores some bush-4.4 backwards compatibility with
          respect to posix-mode assignment statements preceding special
          builtins and shell functions. The bush-5.0 behavior, while perhaps
          defensible, caused too many compatibility problems. Originally
          prompted by several discussions with Martijn Dekker; the current
          incarnation and tests based on a report to Debian BTS from
          Thorsten Glaser <tg@mirbsd.de>

                                   8/26
                                   ----
shell.c,bushhist.c
        - __P -> PARAMS

shell.c
        - set_option_defaults,reset_option_defaults: before calling
          list_minus_o_options at invocation, call set_option_defaults to
          set the options that are initialized to -1 to either 1 or 0, as
          appropriate; then call reset_option_defaults to set them back to -1
          after list_minus_o_options returns
        - init_interactive: if enable_history_list == -1, set it to 1, then
          set remember_on_history to enable_history_list. Fixes bug reported
          by Alex Kerzner <alex.j.kerzner@gmail.com>
        - init_noninteractive: if enable_history_list == -1, set it to 0, let
          bush_history_reinit take care of setting remember_on_history
        - init_interactive_script: if enable_history_list == -1, set it to 1,
          then set remember_on_history to enable_history_list

bushhist.c
        - enable_history_list: initialize to -1 to note when it gets changed
          by -o history or +o history at invocation

                                   8/28
                                   ----
lib/readline/terminal.c
        - TGETENT_SUCCESS, TGETFLAG_SUCCESS: defines to represent successful
          returns from tgetent and tgetflag, since HPUX manages to get them
          wrong. New patch from Osipov, Michael <michael.osipov@siemens.com>
        - TGETFLAG: new define, make sure tgetflag returns TGETENT_SUCCESS
        - _rl_init_terminal_io: use TGETENT_SUCCESS and TGETFLAG

configure.ac
        - hpux: make sure to define TGETFLAG_BROKEN

                                   8/30
                                   ----
tests
        - add copyright notices to all scripts longer than 15 lines at the
          request of the FSF

                                    9/1
                                    ---
lib/readline/complete.c
        - _rl_complete_internal: move logic that checks whether the last
          completion attempt failed and the current attempt returned a single
          match and insert the single completion here. A better implementation
          of Richard Stallman's suggestion of 2/23.

                                    9/3
                                    ---
bushline.c
        - edit_and_execute_command: reset the readahead token after calling
          restore_parser_state, in case some call to reset_parser set
          token_to_read. Fixes bug reported by null <avalonvales@protonmail.com>

                                    9/9
                                    ---
execute_cmd.c
        - execute_command_internal: if we're executing a command list
          (executing_list != 0), save the old fifo list and close any new
          FIFOs that the command opens. Fixes bug reported by
          Kamil Cukrowski <kamilcukrowski@gmail.com>

                                   9/10
                                   ----
aclocal.m4,m4/intdiv0.m4
        - make sure `exit' is used consistently with <stdlib.h> included
        - make sure `main' isn't declared to implicitly return int
        - include <ulimit.h> before using ulimit
        - include <string.h> before testing string functions
        - fixes from Florian Weimer <fweimer@redhat.com>

configure.ac
        - setresuid,setresgid: use AC_CHECK_FUNCS instead of AC_CHECK_DECL,
          which always fails

shell.c
        - disable_priv_mode: use HAVE_SETRESUID and HAVE_SETRESGID instead of
          the HAVE_DECL variants, which always fail configure tests

m4/intl.m4
        - gt_INTL_SUBDIR_CORE: add back check for localeconv, removed in
          newer gettext releases

                                   9/16
                                   ----
builtins/help.def
        - help_builtin: make the closing quote printed after the argument list
          for a glob pattern argument a translatable string to ease translation
          for certain languages. Report from Roland Illig <roland.illig@gmx.de>

builtins/{reserved,complete,exec,getopts}.def
        - minor typographical fixes from Roland Illig <roland.illig@gmx.de>

siglist.c
        - include general.h for INT_STRLEN_BOUND
        - initialize_siglist: use the same string for the strlen and xmalloc
          for the message about an unknown signal number; use INT_STRLEN_BOUND
          instead of a fixed 10 for the number

builtins/getopts.def,doc/{bush.1,bushref.texi}
        - getopts: minor changes to the description of the effect of supplying
          additional arguments. Report from Roland Illig <roland.illig@gmx.de>

                                   9/17
                                   ----
jobs.[ch]
        - save_proc_status: external interface to bgp_add, takes care of
          blocking and unblocking SIGCHLD
        - __P -> PARAMS

                                   9/18
                                   ----
jobs.[ch]
        - procsub_{free,add,search,delete,waitpid,waitall,clear,prune}: new
          functions to keep track of the list of active process substitutions
          and their statuses. Implementation is currently a singly-linked list
          of PROCESS *, so functions that expect a PROCESS * to manipulate
          continue to work. Inspired by report from leo.dalecki@ntymail.com
        - find_pipeline,cleanup_dead_jobs,wait_for_background_pids: call new
          procsub_* functions to manage procsub list; don't call the functions
          in subst.c any more

subst.c
        - process_substitute: call procsub_add with the PROCESS * returned
          from make_child; let the functions in jobs.c manage the list.
          waitchld continues to set the pid field in the fifo list as a hint
          that a particular fd or FIFO is no longer used and can be reaped
        - process_substitute: let the child process clear out any existing
          procsub pid list
        - wait_procsubs: no longer compiled in

sig.c
        - termsig_handler: replace discard_last_procsub_child with call to
          procsub_clear

lib/readline/display.c
        - init_line_structures: fix a problem which results in references to
          uninitialized memory when gdb sets the number of columns to 32767
          (their `unlimited'). Modification of change from 5/23. Report and
          fix from Andrew Burgess <andrew.burgess@embecosm.com>

                                   9/19
                                   ----
parse.y
        - xparse_dolparen: after calling parse_string to consume input, make
          sure to reset the parser (reset_parser()) before restoring the EOF
          token and the parser_state variable. Fixes issue with nested traps
          running command substitutions in command lines with command
          substitutions reported by Travis Everett <travis.a.everett@gmail.com>

                                   9/20
                                   ----
doc/{bushref.texi,bush.1}
        - fixed a typo in the example for the =~ operator: the ? should follow
          the (a), not precede it. Report from hk <hkadeveloper@gmail.com>
        - some changes to the text describing regular expression matching for
          the =~ operator

                                   9/25
                                   ----
general.c,builtins/shopt.def
        - posix_glob_backslash: remove references to this variable and the
          `posixglob' shell option

doc/{bush.1,bushref.texi}
        - remove references to the `posixglob' shell option

                                   9/26
                                   ----
{jobs,nojobs}.c
        - DEFAULT_MAX_CHILD: bump this up to 4096
        - set_maxchild: set lmaxchild to MAX_CHILD_MAX if getmaxchild returns
          -1 without changing errno (assume that sysconf returns -1 meaning
          unlimited)
        - initialize_job_control: call set_maxchild instead of inline code
        - mark_dead_jobs_as_notified: call set_maxchild to set js.c_childmax
          if it hasn't been set yet

                                   9/30
                                   ----
lib/glob/xmbsrtowcs.c
        - xwcsrtombs: implementation of wcsrtombs from gnulib, modified to
          treat invalid wide characters (or wide characters that can't be
          converted to multibyte character sequences) as bytes. Should be
          used only in unusual circumstances where wcsrtombs fails.

lib/glob/glob.c
        - wdequote_pathname: if wcsrtombs fails to convert the dequoted wide
          character pathname back to a sequence of multibyte characters, call
          xwcsrtombs to try to treat the invalid wide characters as bytes --
          the call to xdupmbstowcs treats bytes that don't convert to wide
          characters as just bytes, which kind of causes this problem in the
          first place. Inspired by report from Geoff Kuenning <geoff@cs.hmc.edu>

lib/readline/complete.c
        - compute_lcd_of_matches: use the case-folding code (which performs
          character-by-character checking and compares invalid multibyte
          sequences as bytes) instead of the old case-sensitive code (which
          used _rl_compare_chars), converting characters to lowercase as
          needed. Fixes bug with invalid sequences in common filename prefixes
          reported by Grisha Levit <grishalevit@gmail.com>

                                   10/1
                                   ----
builtins/shopt.def
        - reset_shopt_options: add in resets for some missing shopt options.
          Report and fix from Grisha Levit <grishalevit@gmail.com>

execute_cmd.c
        - execute_command_internal: make sure a failed attempt to define a
          shell function causes the shell to exit if -e is enabled. Report
          from Andreas Kusalananda Kähäri <andreas.kahari@abc.se>
        - execute_command_internal: combine cm_function_def, cm_arith, and
          cm_cond cases into one switch case, since the code is virtually
          identical across all three

                                   10/3
                                   ----
pathexp.[ch],lib/glob/glob.c,lib/glob/glob_loop.c
        - remove all references to posix_glob_backslash in preparation for
          implementing austin group interpretation #1234

pathexp.c
        - unquoted_glob_pattern_p: revert to bush-4.4 behavior of returning 1
          only if there is an unquoted `*', `?', or bracket expression, as
          per austin group interpretation #1234

lib/glob/glob_loop.c
        - INTERNAL_GLOB_PATTERN_P: revert to bush-4.4 behavior of returning 1
          only if there is an unquoted `*', `?', or bracket expression, as
          per austin group interpretation #1234

                                   10/4
                                   ----
variables.c
        - assign_seconds,get_seconds: use the tv_sec value returned from
          gettimeofday() instead of time() to get a better approximation of
          the number of seconds since the epoch for future calculations.
          From a report by Stephane Chazelas <stephane.chazelas@gmail.com>

pathexp.[ch],{bushline,subst}.c
        - shell_glob_filename: now takes an additional flags argument to pass
          to quote_string_for_globbing

                                   10/6
                                   ----
subst.c
        - glob_expand_word_list: call shell_glob_filename with QGLOB_CTLESC
          because quote removal hasn't been performed yet

                                   10/7
                                   ----
pathexp.c
        - quote_string_for_globbing: if we have an unquoted backslash followed
          by a CTLESC-quoted character (not CTLESC-CTLESC), just perform the
          usual CTLESC-to-backslash conversion instead of skipping over it.
          Fixes issue raised in austin-group discussion about globbing by
          Geoff Clare <gwc@opengroup.org> (austin-group issue 1234), though
          it's still inherently ambiguous

                                   10/8
                                   ----
include/shmbutil.h
        - xwcsrtombs: extern declaration, to match other functions in that file

lib/glob/glob.c
        - wcdequote_pathname: new function, actual backslash quote removal code
          from wdequote_pathname; wdequote_pathname calls it

lib/glob/glob.c
        - {udequote,wcdequote}_pathname: now public void functions

lib/glob/smatch.c
        - DEQUOTE_PATHNAME: defined appropriately to udequote_pathname or
          wcdequote_pathname

lib/glob/sm_loop.c
        - DEQUOTE_PATHNAME: appropriate extern declaration
        - BRACKMATCH: call DEQUOTE_PATHNAME to dequote a character class name
          in a bracket expression. This is the result of a discussion on the
          austin-group mailing list, from Geoff Clare <gwc@opengroup.org> and
          Robert Elz <kre@bmunnari.oz.au>

                                   10/10
                                   -----
execute_cmd.[ch]
        - async_redirect_stdin: now a global function

subst.c
        - process_substitute: call async_redirect_stdin in the child to keep
          it from having stdin connected to the terminal, since it's not a
          job control process

                                   10/11
                                   -----
subst.c
        - process_substitute: in the child process, set interactive = 0, since
          an asynchronous process substitution process is not interactive.
          Seems to fix issue reported by Grisha Levit <grishalevit@gmail.com>

lib/sh/shmatch.c
        - sh_regmatch: implement a suggestion from Grisha Levit
          <grishalevit@gmail.com> and don't allow nocaseglob to enable case-
          insensitive regexp matching. It hasn't been documented that way
          in years

                                   10/30
                                   -----
bushhist.c
        - bush_add_history: fix a couple of problems with adding extra blank
          lines to history entries containing here-documents. Fixes bug
          reported by Oguz <oguzismailuysal@gmail.com>

lib/sh/shmatch.c
        - BUSH_REMATCH: no longer set to readonly. From a suggestion from
          Rocky Bernstein <rocky@gnu.org>

doc/{bush.1,bushref.texi}
        - BUSH_REMATCH: document that it's no longer set to readonly

subst.c
        - getpattern: since expand_string_for_pat leaves the pattern quoted,
          we need to remove quoted nulls before running the string through
          string_list (and then quote_string_for_globbing, since QGLOB_CVTNULL
          only handles pat[0] == CTLNUL). Fixes bug reported by Oguz
          <oguzismailuysal@gmail.com>

                                   11/4
                                   ----
configure.ac,config.h.in
        - AC_HEADER_MAJOR: look for `major' and `minor' in various header files
          and define MAJOR_IN_MAKEDEV or MAJOR_IN_SYSMACROS as appropriate.
          From a patch from Eli Schwartz <eschwartz@archlinux.org>

examples/loadables/finfo.c
        - include <sys/mkdev.h> and <sys/sysmacros.h> as appropriate for
          definitions of major/minor

                                   11/6
                                   ----
redir.c
        - heredoc_expand: if we are expanding the WORD in a here-string, use
          expand_assignment_string_to_string so the expansions are consistent
          in contexts where word splitting is not performed. From a bug report
          by Robin A. Meade <robin.a.meade@gmail.com>

                                   11/7
                                   ----
parse.y
        - xparse_dolparen: if the command substitution is incomplete or doesn't
          end in `)', print an error message instead of allowing EOS to
          terminate the comsub. From a bug report from
          Oguz <oguzismailuysal@gmail.com>

                                   11/11
                                   -----
lib/sh/unicode.c
        - u32toutf8: fix a typo that assigned the wrong value to the first
          byte of a six-byte UTF-8 character. Report and fix from
          István Pásztor <pasztorpisti@gmail.com>

                                   11/15
                                   -----
doc/bush.1,lib/readline/doc/{history.3,hsuser.texi}
        - quick substitution: make it clear that ^s1^s2^ is equivalent to
          !!:s^s1^s2^, since that's the internal transformation we perform.
          Reported by Jim Monte <jim.monte01@gmail.com>
        - note that the `q' and `x' modifiers are mutually exclusive; last
          one wins. Reported by Jim Monte <jim.monte01@gmail.com>
        - note that the `G' modifier can work with `&' as well as `s'.
          Reported by Jim Monte <jim.monte01@gmail.com>
        - note that a word designator of `-' is equivalent to `0-'.
          Reported by Jim Monte <jim.monte01@gmail.com>
        - note that a missing `new' in a substitution modifier causes
          instances of `old' to be deleted

lib/readline/histexpand.c
        - history_expand_internal: make multiple :p modifiers work to suppress
          execution. Reported by Jim Monte <jim.monte01@gmail.com>
        - get_history_word_specifier: fix so a `^' word designator works as
          the second part of a range.
          Reported by Jim Monte <jim.monte01@gmail.com>
        - hist_error: make sure we don't blindly copy a null character into
          the error string (e.g., if there is a missing word designator
          following `:'). Reported by Jim Monte <jim.monte01@gmail.com>
        - get_history_event: if the history event specifier (!) is followed
          immediately by a `-' and a non-digit (e.g. !-a), make sure the - is
          treated as part of a search string instead of making it an offset of
          0. Reported by Jim Monte <jim.monte01@gmail.com>

                                   11/19
                                   -----
lib/readline/{colors,complete,histfile,input}.c,support/shobj-conf
        - fixes to make readline compile on the latest HPE Nonstop (Tandem)
          releases. From Randall S. Becker <rsbecker@nexbridge.com>

subst.c
        - pat_subst: if we have a null match, make sure we advance by one
          character, not one byte. Bug reported by Chris Carlen
          <crobc@sbcglobal.net>

                                   11/22
                                   -----
jobs.[ch],nojobs.c,builtins/jobs.def
        - get_job_by_pid: now takes a PROCESS ** third argument; if non-null,
          it gets a pointer to the PROCESS struct corresponding to the PID
          argument. A convenience, not used by any caller yet

builtins/wait.def
        - interrupt_immediately: remove any uses, no longer used anywheren

variables.c
        - check_unbind_variable: return -2 if the variable name is readonly
          (change) or non-unsettable (new) to differentiate the return value
          from -1 from makunbound (which means variable not found)

builtins/common.[ch]
        - builtin_unbind_variable: identical to check_unbind_variable but calls
          builtin_error; for use by builtin commands

buitins/wait.def
        - wait_builtin: now has -p VARNAME option, which takes the pid
          returned by `wait -n' or wait without arguments and assigns it to
          VARNAME, unsetting VARNAME first. Requested by Robert Elz
          <kre@bmunnari.oz.au> after a similar feature in netbsd sh (not
          completely compatible yet)

doc/{bush.1,bushref.texi}
        - wait: document new -p option

                                   11/25
                                   -----
lib/readline/display.c
        - rl_redisplay: auto-set horizontal scrolling if the terminal has
          only one line; disable it if we auto-set it if the terminal grows
          to more than one line. Fix from Sören Tempel
          <soeren@soeren-tempel.net>

lib/readline/doc/{readline.3,rluser.texi},doc/bush.1
        - horizontal-scroll-mode: document auto-setting behavior

builtins/set.def
        - set_posix_mode: make setting posix mode when it's already set, or
          unsetting it when it's not set, a no-op. Inspired by a report
          from Ulrich Mueller <ulm@gentoo.org>

                                   11/26
                                   -----
doc/{bush.1,bushref.texi}
        - functions: clarify that when in default mode, function names are not
          limited to shell identifiers.
          Suggested by Reuti <reuti@staff.uni-marburg.de>

                                   11/27
                                   -----
lib/readline/display.c
        - _rl_optimize_redisplay: tell the redisplay routines to not worry
          about calculating differences between the lines and just draw the
          new one. Right now, it just sets the _rl_quick_redisplay flag
        - rl_redisplay: if _rl_quick_redisplay is set, just draw NEW onto
          the screen at column 0 with a dumb update and clear the rest of
          the line. Intended to be used when the caller knows the new line is
          sufficiently different from the old one (e.g., when drawing the
          i-search prompt for the first time) that it doesn't pay off to do
          the calculations. As a side effect, fixes the bug reported by
          ÐлекÑей Шилин <rootlexx@mail.ru>

lib/readline/isearch.c
        - rl_display_search: if there isn't a search string, assume this is
          the first time this is called and call _rl_optimize_redisplay to
          give the redisplay code a hint

                                   12/2
                                   ----
builtins/wait.def
        - wait_builtin: allow argument to -p to be a  valid array subscript

                                   12/3
                                   ----
lib/readline/isearch.c
        - _rl_isearch_fini: add call to _rl_optimize_redisplay because we are
          switching the prompt back again and it's safer to redraw everything
          (even though part of the line is the same) to deal with differences
          in the prompt strings. Fixes additional problem reported by
          ÐлекÑей Шилин <rootlexx@mail.ru>

lib/readline/display.c
        - update_line: quick redisplay no longer sets cpos_adjusted before
          the dumb update
        - update_line: adjust _rl_last_c_pos in the case of a dumb update if we
          are redrawing the prompt that includes invisible characters, since
          _rl_col_width does not. We adjust by the count of invisible chars in
          the first line of the prompt
        - update_line: make sure to clear the rest of the line if it looks like
          the number of visible characters on the new line is less than the
          number of visible characters on the current line; the old calculation
          does that just for the number of bytes (which is also useful)

                                   12/4
                                   ----
lib/readline/display.c
        - rl_redisplay: if we are changing from one line to multiple lines,
          don't try quick redisplay
        - update_line: changes to quick redisplay to take advantage of knowing
          the physical length of the prompt to avoid having to compute column
          widths of the prompt string again; moved code to call clear screen
          to the quick update section; no longer performs `goto dumb_update'
        - update_line: try to take advantage of prompt_physical_chars when we
          know we have written the prompt string (several places) to set
          _rl_last_c_pos and calculate column widths
        - update_line: if the spot where the old and new lines are the same is
          before the end of the prompt string, adjust NLS and OLS so we write
          the entire prompt string (as long as it's all on one line) and can
          take advantage of already knowing prompt_physical_chars so we don't
          have to compute column widths
        - update_line: when copying chars from first diff to last match, adjust
          _rl_last_c_pos by prompt_invis_chars_first_line, not wrap offset,
          since we are on the first line, and only do this if we inserted more
          bytes than wrap_offset (old code checked _rl_last_c_pos, which is
          wrong in the presence of multibyte characters)

                                   12/5
                                   ----
lib/readline/display.c
        - ADJUST_CPOS: define macro and use it in places where _rl_last_c_pos
          is changed

                                   12/12
                                   -----
lib/readline/isearch.c
        - _rl_isearch_dispatch: check for multibyte characters mapped to one
          of the editing functions we treat specially to modify the search
          string

                                   12/13
                                   -----
support/shobj-conf
        - FreeBSD and Dragonfly are ELF-only and can use the same code as
          Linux, so add those to the linux stanza and remove the old FreeBSD
          version-specific sections. Report and fix from Baptiste Daroussin
          <bapt@FreeBSD.org>

bushline.[ch]
        - bush_execute_unix_command: no longer static, available for other
          parts of the shell to use

bushline.c
        - unbind_unix_command: take a key sequence as an argument, and unbind
          it in the appropriate unix command keymap

builtins/bind.def
        - unbind_keyseq: if we are unbinding a key sequence bound to
          bush_execute_unix_command, which means it was added by `bind -x',
          call unbind_unix_command() to remove it from the appropriate unix
          command keymap. Fixes issue originally raised by
          Koichi Murase <myoga.murase@gmail.com> and recently by
          Šimon Let <simon.a.let@gmail.com>
        - bind_builtin: check the number of bindings to bush_execute_unix_command
          before and after a call to rl_parse_and_bind and if there are fewer
          after binding, we know that the bind has re-bound one of the key
          sequences that was bound to execute a shell command. We unbind any
          key sequences from the list before the call to rl_parse_and_bind that
          don't appear in the list after the call using unbind_unix_command

                                   12/19
                                   -----
include/posixstat.h
        - added some definitions for MinGW. Report and patch from
          Eli Zaretskii <eliz@gnu.org>

                                   12/20
                                   -----
lib/readline/display.c
        - update_line: when wrapping lines containing multibyte characters at
          the wrap point, and the number of screen positions consumed by the
          first character on the new line isn't the same as the old line,
          make sure we set OE before the `goto dumb_update;' since clearing
          the rest of the line may use it. Tentative fix for bug reported by
          Kirill Chibisov <wchibisovkirill@gmail.com>

lib/readline/signals.c
        - _rl_signal_handler: set RL_STATE_SIGHANDLER around SIGWINCH code,
          like _rl_handle_signal does

                                   12/26
                                   -----
lib/sh/stringvec.c
        - strvec_posixcmp: new function that conforms to posix requirement for
          sorting globs: perform a bytewise comparison if the two strings
          collate equally. Posix interp 963 and 1070
        - strvec_sort: take a new flags argument, if non-zero use the posix
          string comparison function

pathexp.c
        - shell_glob_filename: call strvec_sort with the flag value to be
          posix conformant

lib/sh/stringlist.c
        - strvec_sort: change callers

                                   12/29
                                   -----
sig.c
        - throw_to_top_level: set running_trap to 0 after calling run_trap_cleanup.
          This avoids spurious (in non-release versions) warnings from
          run_pending_traps the next time a trap handler for that signal
          runs. Bug report from Martijn Dekker <martijn@inlv.org>

                                 1/14/2020
                                 ---------
bushline.c
        - find_cmd_start: don't treat the open brace in brace expansion as a
          command start character; only treat open brace specially if it can
          be a reserved word. Fixes bug reported back in October, 2019 in
          https://savannah.gnu.org/support/index.php?110063

                                   1/15
                                   ----
lib/readline/readline.c
        - _rl_dispatch_subseq,_rl_subseq_result: if we push back a character
          with _rl_unget_char or otherwise go back up the chain without a
          sequence match, make sure we back up in rl_executing_keyseq.
          Report and fix from Koichi Murase <myoga.murase@gmail.com>

builtins/bind.def
        - unbind_keyseq: if we unbind something that ends up pointing to a
          shadow keymap, restore the ANYOTHERKEY binding that we used when
          binding it.
          Report and fix from Koichi Murase <myoga.murase@gmail.com>

bushline.c
        - bush_execute_unix_command: if we walked cmd_xmap for rl_executing_keyseq
          and ended up pointing to a keymap (type == ISKMAP) we want the
          binding for ANYOTHERKEY instead.
          Report and fix from Koichi Murase <myoga.murase@gmail.com>

lib/readline/bind.c
        - rl_bind_key: if we're trying to bind a key sequence containing '\0'
          using the old-style binding syntax (C-SPC), make sure we quote the
          NULL so it will make it through rl_translate_keyseq().
          Report and fix from Koichi Murase <myoga.murase@gmail.com>
        - rl_bind_key: if we're overwriting a binding for a macro, make sure to
          free the old macro value.
          Report and fix from Koichi Murase <myoga.murase@gmail.com>
        - rl_generic_bind: if we're overwriting a macro saved to ANYOTHERKEY in
          a shadow keymap created by rl_generic_bind, make sure to free the
          macro data.
          Report and fix from Koichi Murase <myoga.murase@gmail.com>

trap.c
        - run_pending_traps: save and restore the value of running_trap around
          cycle through pending signals so recursive trap handler calls don't
          set running_trap to 0
        - _run_trap_internal: allow some signals the shell treats specially
          (e.g., SIGINT) to run recursive handlers
        - _run_trap_internal: don't turn off SIG_INPROGRESS flag if it was on
          for this signal when _run_trap_internal was called
        - _run_trap_internal: save and restore the value of running_trap around
          running the trap handler, except for SIGCHLD. Fixes bug reported by
          Martijn Dekker <martijn@inlv.org>

                                   1/16
                                   ----
general.c
        - posix_initialize: if turning posix mode off, restore settings from
          any saved set, if one exists, instead of setting a default environment

                                   1/17
                                   ----
parse.y,subst.c
        - process_substitution: now available in POSIX mode. Most recently
          requested by Martijn Dekker <martijn@inlv.org>; requested several
          times in the past

doc/bushref.texi
        - posix mode: remove restriction that posix mode is not available

lib/readline/vi_mode.c
        - rl_domove_motion_callback: make sure to extend rl_line_buffer so it
          can hold the dummy blank character we're appending. From a fuzzing
          report by Tillmann Osswald <tosswald@ernw.de>
        - vi_yank_dispatch: after we do an undo, make sure to fix point to be
          less than the (new) rl_end

lib/readline/text.c
        - rl_forward_word: make sure that MB_NEXTCHAR doesn't go past rl_end on
          invalid multibyte sequences

                                   1/18
                                   ----
test.c
        - for the `-v' operator, use a clever trick from Martijn Dekker and
          just test whether N is between 0 and $#.

                                   1/21
                                   ----
lib/readline/text.c
        - rl_change_case: fix argument to rl_extend_line_buffer; make sure to
          reset s and e after call in case rl_line_buffer was reallocated

lib/readline/vi_mode.c
        - _rl_vi_save_replace: if start ends up being less than zero, make
          sure we don't read before the start of rl_line_buffer
        - rl_vi_overstrike_kill_line,rl_vi_overstrike_kill_word: replacement
          functions for ^U and ^W in vi overstrike mode, to keep right value
          for vi_replace_count.
        - rl_vi_overstrike_yank: similar for ^Y and rl_yank

                                   1/22
                                   ----
lib/readline/display.c
        - update_line: if we're trying to wrap lines on an autowrap terminal,
          punt and do a dumb update if the number of bytes in the first char
          on the new line is greater than the number of bytes in the first char
          of the old line. There's no guarantee we'll be able to extend the
          old line buffer enough to accommodate the new bytes
        - update_line: try to avoid some operations when wrapping lines if the
          number of bytes in the first characters of the old and new lines is
          the same
        - update_line: when updating vis_lbreaks after fixing up the lines when
          wrapping, make sure we don't exceed an index of _rl_vis_botlin when
          updating the line break offsets

lib/readline/text.c
        - rl_delete_text: if deleting text leaves the mark past rl_end, adjust
          it to rl_end

lib/readline/vi_mode.c
        - _rl_vi_goto_mark: make sure to call _rl_fix_point after setting
          rl_point to rl_mark

                                   1/23
                                   ----
lib/readline/kill.c
        - rl_kill_region,region_kill_internal: call _rl_fix_point

lib/readline/text.c,lib/readline/rlprivate.h
        - _rl_fix_mark: new function to clamp rl_mark between 0 and rl_end

                                   1/24
                                   ----
lib/readline/bind.c
        - rl_translate_keyseq: rework how key sequences are translated with
          the intent of normalizing backslash treatment. Since the current
          behavior of, e.g., \C-\\, is inconsistent, this change chooses to
          effectively treat and display \\ as \\ instead of \C-\. This is not
          completely backwards compatible, but it seems like the most reasonable
          choice. This allows things like \M-\a but is not compatible with
          pre-bush-4.4 (readline 7.0) handling of \C-\, which is now treated
          like \C-\0. If that proves to be a problem, we can add code to
          understand \C-\ as equivalent to \C-\\. Since attempting to bind
          "\C-\" has generated an error for a long time, it doesn't seem like
          it will be too much of a problem.
          Fixes from Koichi Murase <myoga.murase@gmail.com>
        - rl_invoking_keyseqs_in_map: make sure to consistently output
          backslash as `\\' instead of producing `\C-\'
          Fixes from Koichi Murase <myoga.murase@gmail.com>

                                   1/29
                                   ----
bushline.c
        - readline_get_char_offset: translate a readline buffer offset
          (rl_point, rl_mark, rl_end) into a number of (possibly multibyte)
          characters
        - readline_set_char_offset: translate a number of (possibly multibyte)
          characters into a buffer offset in rl_line_buffer. Uses a private
          readline function to do it, which is bad
        - bush_execute_unix_command: use readline_{get,set}_char_offset to
          translate the rl_point to a character offset
        - bush_execute_unix_command: bind READLINE_MARK variable, exposing
          the value of rl_mark to `bind -x' functions

doc/{bush.1,bushref.texi}
        - READLINE_MARK: document new variable set by the shell

                                   1/31
                                   ----
examples/loadables/accept.c
        - accept: new loadable builtin that will accept a TCP connection on a
          specified port. Inspired by Stan Marsh <gazelle@xmission.com>

                                    2/1
                                    ---
lib/readline/histfile.c
        - history_do_write,history_truncate_file: translate the return value rv
          to errno when histfile_restore returns -1 (e.g., if rename() fails).
          Report and fix from A <auroralanes@protonmail.ch>

                                    2/3
                                    ---
lib/sh/ufuncs.c
        - fsleep: if pselect/select is interrupted by a signal, return -1 and
          let the caller deal with it

lib/sh/timeval.c
        - multimeval: new function, multiply a timeval by a constant integer
        - divtimeval: new function, divide a timeval by a constant integer

lib/sh/uconvert.c
        - uconvert: new additional argument: EP. If non-null, it gets the
          address of the first non-digit that ends conversion (like strtod);
          we try to do as much of the conversion as possible if EP is set so
          the caller can clean up

                                    2/4
                                    ---
examples/loadables/mkfifo.c
        - mkfifo: new loadable builtin

                                    2/6
                                    ---
variables.c
        - make_local_variable: make sure local variables that have the same
          names as variables found in the temporary environment are marked as
          local. From Grisha Levit <grishalevit@gmail.com> back in 12/2018

                                    2/7
                                    ---
sig.[ch]
        - restore_sigmask: function to restore top-level signal mask using
          sigprocmask

{sig,eval,jobs,nojobs}.c
        - replace calls to sigprocmask with restore_sigmask(); remove extern
          declarations of top_level_mask

sig.c
        - initialize_shell_signals: if SIGCHLD is blocked at shell startup,
          not only remove it from top_level_mask but make sure it's unblocked

execute_cmd.c
        - execute_pipeline: if lastpipe is enabled and we're executing the
          rightmost pipeline element in the current shell, make sure to unblock
          SIGCHLD before calling execute_command, in case `return' or `exec'
          is run and that call doesn't return. From a report by
          Harald van Dijk <harald@gigawatt.nl> following up to a report
          by Martijn Dekker <martijn@inlv.org>

                                   2/10
                                   ----
builtins/trap.def
        - trap_builtin: in posix mode, when trap is run with -p, show
          the disposition of all signals, even those that are still in the
          default state, including signals that were ignored when the shell
          starts up and haven't been reset. Don't do it in default mode.
          From an austin-group discussion back in April, 2019 (interp 1211)

findcmd.c
        - search_for_command: don't add commands without the execute bit set
          to the command hash table. From https://savannah.gnu.org/patch/?9789
          contributed by michaeljs1990

                                   2/11
                                   ----
expr.c
        - strlong: require `base#' to be followed by an integer constant;
          otherwise throw an error. From a report from Jeremy Townshend
          <jeremy.townshend@gmail.com> back in June, 2019

test.c
        - unary_test: allow -v N to test whether or not positional parameter
          N is set. Most recently suggested by Peng Yu <pengyu.ut@gmail.com>
          and Martijn Dekker <martijn@inlv.org>

builtins/getopts.def
        - dogetopts: use number_of_args() to compute the number of positional
          parameters

{findcmd,variables,subst,trap,sig}.h,builtins/common.h
        - __P --> PARAMS

builtins/shift.def,builtins/common.c
        - shift_builtin: moved code that modifies dollar_vars and rest_of_args
          to common.c:shift_args(int times), part of move to localize changes
          to positional parameters

builtins/common.c,variables.c
        - posparam_count: keep a running count of the number of posititional
          parameters when dollar_vars and rest_of_args are set

                                   2/12
                                   ----
subst.c
        - number_of_args: just return posparam_count

builtins/shift.def
        - shift_builtin: if asked to clear the positional parameters with
          something like `shift $#', just call clear_dollar_vars instead of
          iterating through them, unsetting them one by one

subst.[ch],builtins/common.[ch]
        - number_of_args: moved to builtins/common.c

                                   2/14
                                   ----
subst.c
        - clear_fifo_list: when using named pipes, clear out the FIFO list
          without unlinking anything and set NFIFO to 0

execute_cmd.c
        - execute_disk_command: in the child, clear out the FIFO list, since
          we haven't created any FIFOs yet
        - execute_in_subshell: clear out the FIFO list, since we haven't
          created any FIFOs yet

parse.y
        - special_case_tokens: allow `time -- command'

                                   2/21
                                   ----
subst.c
        - get_var_and_type: if an unset variable (not an array) is supplied
          with the `[@]' subscript, don't return "". Fix to bug reported by
          Arfrever Frehtes Taifersar Arahesis <arfrever.fta@gmail.com>;
          original bug introduced 7/29/2018
        - array_transform: take a STARSUB argument instead of VARNAME, since
          we've already computed what kind of index the array reference uses
          in get_var_and_type, and passing VARNAME to figure out the index
          type doesn't do the right thing when we're using indirect variable
          expansion. Fixes bug reported by 
          Arfrever Frehtes Taifersar Arahesis <arfrever.fta@gmail.com>
        - array_remove_pattern: take the same new STARSUB argument for the
          same reason
        - parameter_brace_transform,parameter_brace_remove_pattern: change
          callers to pass STARSUB instead of VARNAME

                                   2/22
                                   ----
execute_cmd.c
        - fix_assignment_words: if an assignment is supplied to a builtin that
          creates or modifies local variables while a function is executing,
          set the W_FORCELOCAL flag for that word in addition to any of the
          various assignment flags

subst.c
        - shell_expand_word_list: while processing a list of assignments that
          are arguments to a builtin that creates or modifies local variables,
          if make_internal_declare fails while attempting to create the local
          variable (or give it attributes), skip attempting the assignment but
          otherwise do not make this a fatal error. This results in two error
          messages: one to create the variable or modify its attributes, and
          one while attempting to assign the value, but the errors to not
          cause the function to return immediately. Fixes inconsistency
          reported by Arfrever Frehtes Taifersar Arahesis <arfrever.fta@gmail.com>
          

                                   2/23
                                   ----
trap.c
        - first_pending_trap: generalize into first_pending_trap and
          next_pending_trap

wait.def
        - wait_builtin: close up the trapped-signal-arrives hole a little more
          by looking for a signal that arrived between the last check for
          pending traps and setting wait_intr_flag and behaving as if it
          arrived while wait was executing. Use first_pending_trap and
          next_pending_trap to find a pending trap that is not SIGCHLD

trap.c
        - trap_handler: longjmp to wait_intr_buf unconditionally if
          wait_intr_flag is set; don't bother with interrupt_immediately any
          more

variables.c
        - all_local_variables: now takes an arg saying whether to restrict
          return value to visible variables or return all local variables,
          even those that are unset (the new default)
        - visible_variable_in_context: new function, restricts return values
          to set local variables in the current context; variable_in_context
          now returns all local variables in the current context, even the
          unset ones

variables.h
        - all_local_variables: change extern function declaration

builtins/setattr.def
        - show_local_var_attributes: show all local variables at the current
          variable context, including unset ones, and their attributes
        - show_localname_attributes: show attributes for NAME as long as NAME
          resolves to a local variable at the current variable context, even
          if NAME is unset

builtins/common.h
        - show_local_var_attributes, show_localname_attributes: new extern
          declarations

builtins/declare.def
        - declare_internal: allow `-p' option for `local' builtin
        - declare_internal: if `local' is supplied without options, or with
          the `-p' option, but no variable name arguments, display all local
          variables at the current variable context by calling
          show_local_var_attributes
        - declare_internal: if `local -p' is supplied with variable name
          arguments, call show_localname_attributes to display the attributes
          for that name if it resolves to a local variable at the current
          variable context. Fixes issue reported by
          pepa65 <solusos@passchier.net>

subst.c
        - array_var_assignment: if VAR is unset, print the declare command
          without the assignment statement, just with the attributes
        - array_transform: special-case the 'a' attribute and return the
          attribute string even if the array variable is unset.  Feature request
          from Arfrever Frehtes Taifersar Arahesis <arfrever.fta@gmail.com>
        - parameter_brace_transform: if asked to display the attributes and
          value ('A') of an unset variable, make sure we pass the variable, if
          it exists with attributes but without a value, to string_transform
        - string_transform: if we don't have a value but the operator is 'A',
          pass the variable through to string_var_assignment
        - string_var_assignment: if we have an unset variable with attributes,
          return a declare command that just sets the attributes. Feature request
          from Arfrever Frehtes Taifersar Arahesis <arfrever.fta@gmail.com>

                                   2/24
                                   ----
locale.c
        - mblen: don't try to use unless HANDLE_MULITBYTE is defined. From
          https://savannah.gnu.org/support/?110200
        - set_default_locale: if HAVE_SETLOCALE isn't defined, set the default
          locale to "C"

                                   2/25
                                   ----
general.c
        - interrupt_immediately: remove all references to this that are
          already commented out

                                    3/2
                                    ---
variables.c
        - push_var_context,push_posix_tempvar_internal: assignment statements
          preceding shell functions no longer persist after the function
          completes in posix mode. POSIX interp #654, was in P1003.1-2017
        - push_posix_temp_var: variable assignments preceding special builtins
          now act as if an assignment statement had been executed in posix mode
          (the Posix `current execution environment') instead of unconditionally
          creating a global variable

trap.c
        - clear_pending_traps: new function, just clears the pending traps flag
          for all signals

                                    3/6
                                    ---
execute_cmd.c
        - execute_in_subshell: check for interrupts and terminating signals
          before resetting the terminating signal handlers, and clear all
          pending traps -- they're not pending for us and we should not run a
          trap handler for them
        - execute_in_subshell: enable bush-5.1 change from 11/29/2018 that
          resets the signal-in-progress flag if we're running a command in
          a subshell, since we're not running the trap command (we are the
          trap command)

                                   3/10
                                   ----
subst.c
        - parameter_brace_expand: if we assign the empty string to a variable
          using the [:]= expansion in a quoted expansion, make sure we note
          we are returning a quoted null string to the caller by setting
          W_HASQUOTEDNULL. Fixes bug reported by Martin Castillo
          <castilma@uni-bremen.de>

                                   3/17
                                   ----
lib/readline/histfile.c
        - history_truncate_file: only chown the file if we really need to. From
          alex@lisas.de via https://savannah.gnu.org/support/?110207

lib/readline/bind.c
        - rl_unbind_function_in_map: since we are looking for functions, not
          key sequences, descend into keymaps attached to the keymap passed
          as an argument. From a report from lockywolf@gmail.com back on 2/27,
          TENTATIVE CHANGE

variables.h
        - MKLOC_ARRAYOK,MKLOC_ASSOCOK: new flags values for
          make_local_{array,assoc}_variable so we can avoid hard-coded values
          of 1 and make it possible to eventually pass in additional flags

builtins/declare.def
        - declare_internal: make_local_array_variable: pass MKLOC_ASSOCOK
        - declare_internal: make_local_assoc_variable: pass MKLOC_ARRAYOK

variables.c
        - make_local_{array,assoc}_variable: understand new flags, pass
          MKLOC_INHERIT to make_local_variable if it appears in the flags
          argument

builtins/declare.def
        - declare_internal: add a new -I option for local and declare that
          inherits attributes and value from a variable with the same name
          at a previous scope. Inspired by netbsd sh
        - if -I option is supplied, pass MKLOC_INHERIT to make_local_variable
          and its array counterparts make_local_{array,assoc}_variable

subst.c
        - shell_expand_word_list: pass -I to declare if constructing a declare
          command with make_local_declare, meaning we have an array or assoc
          compound assignment. (Slighty unsatisfactory, but ok for now) Fix
          for bug report from Kevin Locke <kevin@kevinlocke.name>,
          https://savannah.gnu.org/support/index.php?109669

                                   3/18
                                   ----
examples/loadables/basename.c
        - basename_builtin: handle -- option without crashing. Report by Peng Yu
          <pengyu.ut@gmail.com>

jobs.c
        - notify_of_job_status: if in posix-mode shell is started with -c,
          jobs should print the status of completed jobs. From a report by
          Robert Elz <kre@munnari.oz.au> back in 12/18

                                   3/19
                                   ----
variables.c
        - assign_in_env: if we're assigning POSIXLY_CORRECT or POSIX_PEDANTIC
          in the temporary environment, save the values of the options
          affected by posix mode so we can restore them when we restore the
          old value of the variable after the command executes. Suggested by
          Martijn Dekker <martijn@inlv.org>

                                   3/20
                                   ----
syntax.h
        - slashify_in_here_document: add `"' to this list, since POSIX says
          that backslashes in here documents behave like backslashes in
          double quotes, and backslash can quote a double quote in a double-
          quoted string. This means that given P=A,

                cat <<EOF
                ${P+\"$P\"}
                EOF

                and

                echo "${P+\"$P\"}"

          should output the same thing. From a report from Dan Jacobson
          <jidanni@jidanni.org> back in 1/2019.

                                   3/23
                                   ----
subst.c
        - string_transform: add `U' (convert to uppercase), `u' (convert
          first character to uppercase), and `L' (convert to lowercase)
          transformations. Inspired by a discussion with Phil Smith
          <phil@philsmith.com> back in May, 2019
        - parameter_brace_transform: make sure `u', `U', and `L' are valid
          transform operators

doc/{bush.1,bushref.texi}
        - parameter transformation: document new `U', `u', and `L' operators

eval.c
        - execute_prompt_command: if an array variable PROMPT_COMMANDS exists,
          prefer it to PROMPT_COMMAND and execute all of the commands contained
          as array elements in index order. From a proposal by Daniel
          Colascione <dancol@google.com> back in 1/2018
        - execute_array_command: function for array_walk to use when executing
          commands in PROMPT_COMMANDS

doc/{bush.1,bushref.texi}
        - PROMPT_COMMANDS: new array variable

                                   3/24
                                   ----
builtins/ulimit.def
        - new -R option, for RLIMIT_RTTIME (max time a real-time process can
          run without blocking). Patch from Maciej Wolny
          <maciekwolny123@gmail.com> back in 7/2017

doc/{bush.1,bushref.texi}
        - ulimit: document new -R option

lib/readline/{display.c,rlprivate.h}
        - _rl_clear_screen: now takes an argument saying whether to attempt to
          clear the terminal scrollback buffer if the right termcap capability
          exists

lib/readline/{text.c,readline.h}
        - rl_clear_display: new bindable command that clears the screen and
          scrollback buffer

lib/readline/funmap.c
        - clear-display: new bindable command name

lib/readline/emacs_keymap.c
        - emacs mode M-C-l now bound to clear-display

doc/bush.1,lib/readline/doc/{readline.3,rluser.texi}
        - clear-display: document new function and default emacs mode binding

arrayfunc.c
        - assign_assoc_from_kvlist: allow compound assignments to associative
          arrays that do not contain words of the form `[key]=value', assume
          such lists are of the form (key1 value1 key2 value2). A missing or
          empty key is an error; a missing value is treated as NULL. You
          cannot mix the two forms. Inspired by a suggestion from Sebastian
          Gniazdowski <sgniazdowski@gmail.com> back in 7/2019

doc/{bush.1,bushref.texi}
        - documented new associative array assignment syntax

assoc.[ch]
        - assoc_to_kvpair: new function that returns a string with quoted
          key/value pairs from given associative array

array.[ch]
        - array_to_kvpair: new function that returns a string with quoted
          key/value pairs from given indexed array (for completeness)

subst.c
        - parameter_brace_transform: new operator `K': produces the (possibly
          quoted) value of a variable, except for arrays, where it expands to
          indexed or associative array assignments in key/value pair form
        - string_transform,parameter_list_transform: expand `K' to (possibly
          quoted) values
        - array_var_assignment: take a new fourth argument saying which kind
          of assoc assignment statement to produce; calls array_to_kvpair or
          assoc_to_kvpair as appropriate and just returns that value if
          necessary without creating a declare command
        - array_transform: if the operator is `K', call array_var_assignment
          with new argument that will produce a list of key/value pairs

doc/{bush.1,bushref.texi}
        - document new 'K' parameter transformation operator

                                   3/25
                                   ----
doc/bush.1,lib/readline/doc/{history.3,readline.3}
        - some text and formatting cleanups from Bjarni Ingi Gislason
          <bjarniig@rhi.hi.is>

bushhist.c
        - SYSLOG_MAXLEN: increase to 1024, since that seems to be what most
          syslog daemons handle
        - bush_syslog_history: if the line is longer than SYSLOG_MAXLEN minus
          the header length, log it in multiple message with a sequence number
          instead of truncating. Inspired by a report from
          <sunhuilin@unionpay.com> back in 7/2018

lib/readline/text.c
        - rl_activate_mark,rl_deactivate_mark,rl_mark_is_active_p,
          rl_keep_mark_active: new functions to manage an active region. We
          don't do anything with an active region yet. Part of a large patch
          for active regions from Daniel Colascione <dancol@google.com>
          originally back in 3/2018
        - rl_clear_screen: call rl_keep_mark_active to keep the region active
          across the screen refresh
        - rl_newline: make sure to deactivate the region even though we don't
          do any redisplay with it yet

lib/readline/readline.h
        - rl_activate_mark,rl_deactivate_mark,rl_mark_is_active_p,
          rl_keep_mark_active: new extern function declarations. They are
          public functions for now

lib/readline/readline.c
        - readline_internal_setup: make sure the region starts out as not
          active
        - readline_internal_charloop: make sure to deactivate the mark after
          a command, unless the command calls rl_keep_mark_active keep it
          active

lib/readline/kill.c
        - rl_bracketed_paste_begin: set rl_mark before inserting the pasted
          text, so the pasted text defines the region
        - rl_bracketed_paste_begin: set the region as active after inserting
          the pasted text

lib/readline/util.c
        - _rl_abort_internal: make sure we deactivate the region

lib/readline/{terminal.c,rlprivate.h}
        - _rl_cr: new function to just output the term_cr (or '\r'). Part of
          the active region patch

lib/readline/display.c
        - _rl_cr: use where appropriate to replace MSDOS-dependent code and
          calls to tputs

lib/readline/terminal.c
        - get and store the terminal sequences to enter and exit standout
          (usually some background color) mode

                                   3/26
                                   ----
subst.[ch]
        - copy_fifo_list: now returns void *
        - close_new_fifos: now takes a void * as the first argument, since it's
          usually the return value from copy_fifo_list
        - close_new_fifos: (named pipes): cast first argument to a char *,
          since copy_fifo_list will (someday) return a bitmap
        - close_new_fifos: (HAVE_DEV_FD): cast first argument to a pid_t *,
          since it takes a copy of dev_fd_list; use that in the loop to
          determine whether or not to close file descriptors. First half of
          fix for bug reported by Valentin Lab <valentin.lab@kalysto.org>
        - unlink_fifo_list: (named pipes): when compacting the list, make sure
          to avoid the copy if i == j, and, after copying fifo_list[i] to
          fifo_list[j], null out fifo_list[i] so we don't try to access it
          later

execute_cmd.c
        - execute_command_internal: don't call reap_procsubs after executing
          the command. Rest of fix for bug reported by Valentin Lab
          <valentin.lab@kalysto.org>
        - execute_command_internal,execute_builtin_or_function: ofifo_list is
          now a void * instead of a char *

                                   3/30
                                   ----
lib/readline/{terminal.c,rlprivate.h}
        - _rl_standout_{on,off}: new functions, to enter and exit terminal
          standout mode

lib/readline/rlprivate.h
        - _rl_refresh_line: new extern declaration

lib/readline/display.c
        - visible and invisible lines: added members to deal with tracking the
          `current face'
        - realloc_line: broke code to manage visible_line and invisible_line
          allocation out of init_line_structures, added code to manage arrays
          of visible and invisible line face info per character
        - invis_{addc,adds,nul}: new functions to add characters to the
          invisible line and keep the invisible face data updated with whatever
          the current face is
        - set_active_region: keep track of the display region that should be
          in standout mode
        - rl_redisplay: use invis_addc/adds/nul to update the invisible line
          buffer instead of modifying invisible_line directly
        - _rl_refresh_line: moved body of function here from text.c

lib/readline/text.c
        - rl_refresh_line: now just calls _rl_refresh_line and marks the display
          as fixed

                                   3/31
                                   ----
variables.c
        - bind_variable_internal: dynamic variables with assignment functions
          now honor the readonly attribute by giving an error. Fixes issue
          reported by Rob Landley <rob@landley.net>
        - assign_seconds: allow seconds to be assigned using an arithmetic
          expression
        - assign_random: allow RANDOM to be assigned using an arithmetic
          expression

doc/{bush.1,bushref.texi}
        - HISTCMD: note that assignments to HISTCMD have no effect

                                    4/2
                                    ---
execute_cmd.c
        - execute_in_subshell: make sure we note that we're not reading our
          command input from a buffered stream any more, so we don't
          sync the buffered stream backwards in subsequent commands this
          subshell runs. Fixes bug reported by OÄuz <oguzismailuysal@gmail.com>

                                    4/3
                                    ---
builtins/read.def
        - read_builtin: if a read in posix mode is interrupted by a signal,
          make sure to preserve the value of errno around calls to
          check_signals and run_pending_traps so any error message isn't quite
          as confusing. Issue reported by Stan Marsh <gazelle@xmission.com>

lib/sh/zread.c
        - zread: preserve value of errno (always EINTR) around calls to
          check_signals or check_signals_and_traps

trap.c
        - run_debug_trap: allow suppress_debug_trap_verbose being set to
          turn off `set -v' temporarily while executing the DEBUG trap (if
          it's set)

builtins/fc.def
        - set suppress_debug_trap_verbose so set -v won't be in effect while
          the DEBUG trap runs. Most recently reported by Ami Fischman
          <ami@fischman.org>; originally raised by Boruch Baum
          <boruch_baum@gmx.com> back in 10/2017

                                    4/6
                                    ---
lib/readline/display.c
        - puts_face,putc_face: new functions to write strings or characters to
          the display while handling standout mode
        - update_line,_rl_move_cursor_relative: take additional argument(s)
          describing the visible and invisible faces corresponding to the
          visible and invisible lines, respectively

lib/readline/readline.c
        - _rl_enable_bracketed_paste: for the time being, initialize to 1 (on
          by default)

trap.c
        - run_interrupt_trap: set pending_sigs[SIGINT] and catch_flag to 0
          since run_pending_trap usually does these things

sig.c
        - throw_to_top_level: only call the SIGINT trap if there is a SIGINT
          trap pending (shouldn't matter, just a check)

bushline.c
        - bush_event_hook: try to identify the signal of interest we've
          received
        - bush_event_hook: if in posix mode running the read builtin, and we
          get a (trappped) SIGINT, throw to top level so we can interrupt
          the read. From a report by Robert Elz <kre@munnari.oz.au>

                                    4/7
                                    ---
lib/readline/display.c
        - update_line: make sure to update and compare face data at the same
          time as comparing old and new line data: the lines are only the same
          if the face information and character information are identical
          (ofd, ols, etc.)
        - update_line: make sure to copy face data along with line data
        - update_line: use puts_face in place of _rl_output_some_chars to
          output face data along with line data
        - _rl_move_cursor_relative: when we write characters, make sure to take
          the face data into account using puts_face
          [END OF INTEGRATION OF ACTIVE MARK AND FACE PATCHES from
          Daniel Colascione <dancol@google.com>]

{jobs,nojobs}.c
        - make_child: to avoid installing a handler for SIGTERM in interactive
          shells, and avoid race conditions with child processes resetting the
          SIGTERM signal handler to the default, block SIGTERM and then
          reset the SIGTERM handler to SIG_DFL before fork, then reset the
          handler to SIG_IGN and unblock it in the parent after fork() returns.
          Fix for readline and SIGTERM handling reported by Chris Down
          <chris@chrisdown.name> (original change was back in 2/2013) that
          allows a bush waiting in readline() for input to be killed with a
          SIGTERM sent by another process
        - take out calls to RESET_SIGTERM, no longer needed

execute_cmd.c
        - execute_in_subshell,execute_simple_command,execute_disk_command:
          remove calls to CHECK_SIGTERM, since we don't install a handler
          any more

lib/readline/readline.c
        - _rl_enable_bracketed_paste: enabled by default for the time being

                                    4/9
                                    ---
jobs.h
        - JWAIT_WAITING: new flag for wait functions; means only wait for jobs
          with the J_WAITING flag set
        - J_WAITING: new job flag, part of arg list to `wait -n'
        - IS_WAITING(i): job i has the J_WAITING flag set

jobs.c
        - wait_for_any_job: if the flags includes JWAIT_WAITING, we only return
          jobs with the J_WAITING flag already set; otherwise we skip them.
          For `wait -n args' support

builtins/wait.def
        - set_waitlist: take a list of jobspecs and set the J_WAITING flag in
          each valid job from the list
        - unset_waitlist: turn off the J_WAITING flag for all jobs where it's
          set
        - wait_builtin: if -n is supplied with a list of arguments, set the
          J_WAITING flag in each job in the list, call wait_for_any_job with
          the JWAIT_WAITING flag, and clean up by calling unset_waitlist().
          From a suggestion from Robert Elz <kre@munnari.oz.au> back in 3/2019
          (originally in 10/2017)

                                   4/11
                                   ----
lib/readline/display.c
        - update_line: in step 5b of the line wrapping prompt code, make sure
          OFDF and NFDF are set before performing a dumb update

                                   4/12
                                   ----
sig.c
        - termsig_handler: make sure to restore TOP_LEVEL_SIGMASK before
          resending a terminating signal to ourselves, in the event that this
          is called in a signal handler context with the terminating signal
          blocked. Inspired by a report from <gentoo_eshoes@tutanota.com>

                                   4/13
                                   ----

lib/readline/text.c
        - rl_newline: if the region is active, call rl_redisplay to clear
          standout mode before returning

lib/readline/display.c
        - norm_face: new function to mark a portion of the invisible face
          buffer as normal text (no standout)
        - rl_redisplay: if the line consumes more than a screen's worth of
          lines, mark the lines that are off the top of the display as having
          a `normal' face

                                   4/14
                                   ----
variables.c
        - LINENO: no longer has the integer attribute, since it does not take
          arithmetic expressions on assignment (use $((expr)) instead)

lib/readline/mbutil.c
        - _rl_find_prev_utf8char: new function, uses the structure of UTF-8
          characters to find the start of the previous one no matter where we
          start: at the beginning of the next character, at the end of a
          multibyte character, or in the middle of a multibyte character.
          EXPERIMENTAL
        - _rl_find_prev_mbchar_internal: for now, call _rl_find_prev_utf8char
          if we are in a UTF-8 locale. EXPERIMENTAL
                                   
                                   4/15
                                   ----
lib/readline/mbutil.c
        - _rl_utf8_mblen: changes to handle invalid multibyte sequences better,
          even when N means that the sequence would be too short anyway

examples/loadables/csv.c
        - csv: new loadable builtin to parse a line of csv data and store it
          into an array supplied as an argument

                                   4/16
                                   ----
examples/loadables/cut.c
        - cut: new loadable builtin
        - lcut: new builtin that does what cut does but on a string supplied
          as an argument (only one string for now)

                                   4/17
                                   ----
jobs.h
        - FORK_SYNC,FORK_ASYNC,FORK_NOJOB: new flag values for the second
          argument to make_child

jobs.c
        - make_child: now takes a set of flags as the second argument

execute_cmd.c
        - make_child: change callers to pass FORK_ASYNC instead of a non-zero
          value as the second argument

subst.c
        - make_child: change callers to pass FORK_ASYNC instead of a non-zero
          value as the second argument

doc/{bush.1,bushref.texi}
        - document that the words in a compound array assignment undergo all
          the shell word expansions, including filename generation and word
          splitting. From a report from E. Choroba <choroba@matfyz.cz>

                                   4/18
                                   ----
subst.c
        - command_substitute: use JOB_CONTROL instead of INTERACTIVE in the
          test to determine whether or not to give the terminal back to
          pipeline_pgrp

jobs.c
        - make_child: if FORK_NOTERM is set in the flags argument, don't call
          give_terminal_to

{jobs,nojobs}.c,jobs.h
        - wait_for: now takes a second argument, a flags word

{execute_cmd,subst}.c
        - wait_for: change all callers to add second argument to wait_for

jobs.c
        - wait_for: if JWAIT_NOTERM is set in the flags argument, don't call
          give_terminal_to

                                   4/19
                                   ----
subst.c
        - command_substitute: block SIGINT around call to read_comsub, so we
          let any interrupts affect the command substitution. Fixes issue
          reported by DALECKI Léo <leo.dalecki@ntymail.com>

hashcmd.h
        - FILENAME_HASH_BUCKETS: increase to 256

assoc.h
        - ASSOC_HASH_BUCKETS: new define, set to 1024

variables.c
        - make_new_assoc_variable,make_local_assoc_variable: call assoc_create
          with ASSOC_HASH_BUCKETS as argument. This changes the hash function
          and how the array keys are ordered (which is not guaranteed)

builtins/read.def
        - read_builtin: in posix mode, or if the read call returns -1/EINTR,
          don't call run_pending_traps until the read command returns. This
          allows a trap action to see the same exit status that the read
          builtin would return when it exits on a signal (e.g., SIGINT == 130).
          From a suggestion by <gentoo_eshoes@tutanota.com>

                                   4/20
                                   ----
hashlib.c 
        - hash_rehash: function to rehash a table, after increasing or decreasing
          the number of buckets. From patches from Thomas Kremer
          (https://savannah.gnu.org/patch/?9850) and Koichi Murase
          <myoga.murase@gmail.com>
        - hash_grow,hash_shrink: grow or shrink a hash table by a factor of
          HASH_REHASH_MULTIPLIER (4)
        - hash_insert,hash_search: call hash_grow if necessary

arrayfunc.c
        - convert_var_to_{array,assoc}: if the original variable had no value
          (it was unset), the array variable should be unset as well. Reported
          by andrej@podzimek.org

                                   4/21
                                   ----
bushline.c
        - set_saved_history: change logic used to decide where in the history
          operate_and_get_next should start by using a logical offset into the
          history list that is an offset from history_base. This avoids having
          to take whether or not the history is stifled and full into account.
          Report and fix from Greg Price <gnprice@gmail.com>
        - operate_and_get_next: just calculate the logical offset of where we
          should be in the history instead of an absolute offset

lib/readline/input.c
        - _rl_nchars_available: new function, returns the number of characters
          available to be read if FIONREAD is available

                                   4/22
                                   ----
lib/readline/{readline.c,rlprivate.h}
        - _rl_pending_command: new struct to hold information about a pending
          command for readline to execute when the current command completes.
          A command can set this up so that it gets executed like a
          continuation before redisplay

lib/readline/readline.c
        - readline_internal_charloop: after _rl_dispatch returns, check
          _rl_command_to_execute, and, if it's non-zero, redisplay and then
          execute it as a command
        - added a small set of library-private functions for managing the
          executing key sequence (not used yet)

lib/readline/isearch.c
        - _rl_isearch_dispatch: if we have found an opcode or have added a
          character to the search string and searched for it, reset the keymap
          and okeymap members of the search context in preparation for reading
          another key sequence/opcode
        - _rl_isearch_dispatch: if we read a key sequence bound to an editing
          command that is not an `opcode', set up _rl_command_to_execute to
          execute it after the searching returns and arrange to break out of
          the search
        - _rl_isearch_dispatch: if we paste in text from bracketed paste, set
          the mark as active so we can highlight it when we display the search
          string
        - _rl_isearch_dispatch: if we've found the search string, activate the
          mark and set rl_point and rl_mark so the search string is highlighted
          when we display the search results
        - _rl_isearch_dispatch: do translation for keys that map to
          rl_do_lowercase_version like we do when dispatching while reading a
          key sequence

                                   4/23
                                   ----
lib/readline/isearch.c
        - _rl_isearch_dispatch: if bracketed paste mode is enabled and there are
          enough characters waiting in the terminal's input queue, try to read
          the bracketed paste prefix and jump straight to the opcode execution
          if we read it. Otherwise, just go on with the ESC. Inspired by report
          from <gentoo_eshoes@tutanota.com>

parse.y
        - parse_comsub: posix-mode shells don't allow a closing right paren to
          delimit a pending here-document -- it requires the newline

doc/bushref.texi
        - POSIX mode: updated posix mode description with the new here-document
          delimiter requirement

lib/readline/search.c
        - _rl_nsearch_dispatch: if bracketed paste mode is enabled, and we read
          an ESC, try to see if we have a bracketed paste op and insert the
          pasted next. If we don't, go on with the ESC
        - _rl_nsearch_dosearch: experimental code to highlight the search string
          when displaying the line found in the history. Only done when we are
          not searching for a pattern, since we don't have information on the
          end of the matching portion of the line. Experimental because it
          changes where we put point and mark if searching is successful

expr.c
        - expr_streval: if find_variable for the case where the string is not
          an array reference doesn't find anything, see if we can find
          something by using find_variable_last_nameref and use the value
          from there in the call to expr_streval, kind of using the expression
          recursion to complement the nameref recursion. Report from
          Daniel Molina <lluvia@autistici.org>

                                   4/24
                                   ----
jobs.c
        - {start,stop}_pipeline: don't reset pipeline_pgrp to 0 if it's already
          the same as shell_pgrp, since we don't want to reset it in the middle
          of a shell started to run a command or process substitution (after
          forking a child to run one command, but before forking another, for
          instance). Reported by Rob Landley <rob@landley.net>

                                   4/27
                                   ----
parse.y
        - function_def: break the productions starting with `function' without
          `()' into two productions to avoid a shift-reduce conflict. Report
          and patch from Dale R. Worley <worley@alum.mit.edu>

variables.h
        - localvar_inherit: add extern declaration here

subst.c
        - shell_expand_word_list: take out change from 3/17 to pass -I to
          make_internal_declare; it generates errors the user will find
          confusing if there is a variable with the same name but a different
          type at a previous scope
        - shell_expand_word_list: check for and note whether or not -I is
          supplied to the declaration command, since it changes the default
          behavior of a compound assignment without -a or -A
        - shell_expand_word_list: if we have a compound assignment that is an
          argument to a declaration command, but there are no options supplied
          to the command that determine the type of the array, make sure we
          call make_internal_declare with either -a (no localvar_inherit or -I)
          or at least -- (if we are inheriting), because  we don't want the
          declare to get skipped before we perform the word assignment. Fixes
          bug reported by Ross Goldberg <ross.goldberg@gmail.com>

                                   4/28
                                   ----
subst.c
        - expand_declaration_argument: new function, broke code that handles
          compound assignments that are arguments to declaration commands out
          of shell_expand_word_list into this function. No functional change
          yet

                                   4/29
                                   ----
subst.c
        - expand_compound_assignment_word: helper function for
          expand_declaration_argument: takes NAME[+]=( VALUE ), converts VALUE
          to a list of words, then single-quotes each word and reconstructs
          the original word. This assumes the result will go to
          do_word_assignment, which will remove the single quotes
        - expand_oneword: helper function for expand_compound_assignment_word,
          takes VALUE and performs the splitting into words, and then the
          expansion and single-quoting of each individual word. Indexed and
          associative arrays take different code paths, because they undergo
          different expansions and associative arrays need special handling to
          avoid having to scan for the end of the subscript multiple times
        - expand_declaration_argument: call expand_compound_assignment_word to
          get the expansion-before-calling-builtins word expansion sequence
          correct. Better fix for for bug report from Kevin Locke
          <kevin@kevinlocke.name>,
          https://savannah.gnu.org/support/index.php?109669

arrayfunc.c
        - quote_array_compound_word: take [IND]=VALUE and convert it to
          ['IND']='VALUE'. Called by quote_compound_array_list for each word
          in the list
        - expand_and_quote_assoc_qword: take [KEY]=VALUE and convert it to
          ['expanded-key']='expanded-value' (or VALUE to 'expanded-value').
          Called by subst.c:expand_oneword() for each word in the list
        - quote_compound_array_list: take a list of words and convert each
          [IND]=VALUE to ['IND']='VALUE' (or just 'VALUE' if there is no
          [IND]=). Used for indexed arrays

arrayfunc.h
        - expand_and_quote_assoc_word,quote_compound_array_list: new extern
          declarations

                                   4/30
                                   ----
doc/{bushref.texi,bush.1}
        - rework description of reserved words a little; add a reserved words
          node to bushref.texi. Based on a report from Dale R. Worley
          <worley@alum.mit.edu>

builtins/history.def
        - history_builtin: if the shell is restricted, don't allow pathnames
          with slashes to be read or written. From a report from
          Diffie <nano@mm.st>

shell.c
        - maybe_make_restricted: add HISTFILE to the list of readonly variables

doc/{bushref.texi,bush.1}
        - document new restricted shell restrictions

                                    5/1
                                    ---
jobs.c
        - wait_for: don't try to give the terminal to shell_pgrp if JWAIT_NOTERM
          is set in the flags argument

subst.c
        - command_substitute: call make_child with FORK_NOTERM flag so it
          doesn't try to set the terminal's process group
        - command_substitute: call wait_for with JWAIT_NOTERM so it doesn't
          try to set the terminal's process group
        - command_substitute: now that wait_for doesn't try to reset the
          terminal's process group, remove the code that tries to clean up
          after that

                                    5/4
                                    ---
doc/bush.1
        - make sure to mention /etc/inputrc as the ultimate default readline
          init file, like other documentation does. Update from
          Greg Price <gnprice@gmail.com>

lib/readline/readline.c
        - if the private startup hook function variable _rl_internal_startup_hook
          is set, execute that after any user-specified startup hook

lib/readline/rlprivate.h
        - _rl_internal_startup_hook: new extern declaration

bushline.c,lib/readline/{misc.c,readline.h}
        - operate_and_get_next: moved to rl_operate_and_get_next so it's
          available to all readline programs, uses _rl_internal_startup_hook.
          Based on patch from Greg Price <gnprice@gmail.com>

lib/readline/funmap.c
        - "operate-and-get-next": now a bindable readline command

lib/readline/emacs_keymap.c
        - rl_operate_and_get_next: bound to ^O in emacs mode by default

doc/bush.1,lib/readline/{readline.3,rluser.texi}
        - operate-and-get-next: move to readline section of the manuals, out of
          bush-specific functions section

                                    5/5
                                    ---
hashlib.c
        - hash_string: use a series of shifts and adds to avoid a multiply by
          FNV_PRIME. From Landon Curt Noll's FNV web page

builtins/fc.def
        - fc_gethist,fc_gethnum: now take an additional argument indicating the
          operating mode: if the arg is 1, fc is listing commands; if it is 0,
          fc is executing commands. Affects how -0 is handled (fc_gethnum
          returns -1). Changed callers to handle the return value appropriately.
          Report from Jason Franklin <jason.franklin@quoininc.com> about
          seg fault and core dump
        - fc_builtin: if fc_gethnum returns < 0 when setting histbeg or histend,
          report a range error

doc/bush.1,lib/readline/doc/hsuser.texi
        - fc: document how 0 and -0 are treated for listing and executing

shell.c
        - run_one_command: call parse_and_execute with SEVAL_RESETLINE so the
          line number gets set to 1. Reported by Rob Landley <rob@landley.net>

                                    5/8
                                    ---
support/config.{guess,sub}
        - update to latest versions

configure.ac
        - add support for `genode' from Emery Hemingway <ehmry@posteo.net>

                                   5/14
                                   ----
test.c
        - term: fix case where an argument that looks like a unary operator,
          but doesn't have enough tokens left to have an argument to that
          operator, was not being treated as a one-argument test. Affects
          only uses of test with four and greater arguments, which posix says
          are unspecified. This is a bug, or at least an incompatibility, at
          least 30 years old.
        - test_command: if there are unconsumed arguments, call test_syntax_error
          with a `syntax error' argument if the first remaining argument starts
          with a `-'. Better than a generic `too many arguments' error

                                   5/19
                                   ----
configure.ac,config.h.in
        - getrandom: add test, define HAVE_GETRANDOM
        - getentropy: add test, define HAVE_GETENTROPY

variables.c
        - get_urand32: use getrandom; provide imperfect emulation that uses
          getentropy if available, and falls back to reading /dev/urandom if
          that's not available. The idea is to use /dev/urandom as little as
          possible

                                   5/20
                                   ----
configure.ac
        - updated version to 5.1-alpha

lib/readline/readline.h
        - updated defines to readline version 8.1

variables.c
        - brand: if shell_compatibility_level is 50 or below, don't xor the
          top and bottom halves of the 32-bit random number together, since
          previous versions did not

                                   5/21
                                   ----
COMPAT
        - overhauled and updated the descriptions of the various shopt compatNN
          options

doc/bushref.texi
        - Shell Compatibility Mode: new section, describes compatibility levels,
          BUSH_COMPAT, and the various compatNN shopt options

                                   5/23
                                   ----
doc/bush.1
        - added Shell Compatibility mode section

doc/{bush.1,bushref.texi}
        - changed shopt section to list the compatibility options and refer
          to Shell Compatibility Mode section
        - BUSH_COMPAT: overhauled the text, refers to Shell Compatibility Mode
          section

                                   5/27
                                   ----
variables.c,/lib/sh/random.c
        - moved functions that manage 16-bit and 32-bit random values to
          lib/sh/random.c

alias.c
        - add_alias: don't bother checking null alias values for ending in
          space or tab

braces.c,include/typemax.h
        - move sh_imaxabs and overflow and underflow detection to typemax.h
          so the expression evaluation code can use it in the future

                                   5/28
                                   ----
lib/readline/kill.c
        - _rl_bracketed_read_mbstring: make sure to fill in mb[0] even if
          the locale says MB_CUR_MAX == 1 in case a caller uses it. Partial
          fix for bug reported by Phi Debian <phi.debian@gmail.com>

lib/readline/vi_mode.c
        - rl_vi_change_char: make sure _rl_vi_last_replacement gets filled in
          in the case where MB_CUR_MAX == 1. Rest of fix for bug reported by
          Phi Debian <phi.debian@gmail.com>
        - _rl_vi_callback_change_char: same fix for _rl_vi_last_replacement

                                   5/29
                                   ----
lib/malloc/malloc.c
        - __P -> PARAMS
        - union mhead: now 16 bytes to force 16-byte alignment; extra 8 bytes
          at the end of struct minfo to use for guard bytes. Enabled if
          pointers are 64 bits (SIZEOF_CHAR_P == 8)
        - if we have 64-bit pointers, prepopulate the 64-byte bin first instead
          of the 32-byte bin (pointers and WORD_DESCs still fit into 32 bytes,
          but WORD_LISTs are now 36 bytes with malloc overhead). We can still
          split 64-byte blocks to satisfy 32-byte requests
        - internal_malloc: fill in the new 8 mh_magic8 bytes with MAGIC1 guard
          bytes
        - internal_malloc: print a warning message if the returned pointer is
          not aligned according to MALIGN_MASK
        - internal_free: detect underflow by checking that mh_magic8 is full
          of MAGIC1 bytes
        - internal_realloc: detect underflow by checking that mh_magic8 is full
          of MAGIC1 bytes

lib/malloc/stats.c
        - _print_malloc_stats: slight adjustment for better column alignment

                                    6/1
                                    ---
execute_cmd.c
        - execute_command_internal: treat a redirection failure with errexit
          set as a command failure that exits the shell. Bug report from
          Hyunho Cho <mug896@naver.com>

                                    6/3
                                    ---
redir.c
        - redirection_error: takes a new argument, FN, which if non-NULL is
          the filename to be used in the error message.

redir.[ch],builtins/evalstring.c
        - redirection_error: changed extern declaration and callers

redir.c
        - do_redirection_internal: takes a new third parameter, FNP, a char **
          to use (*FNP, if non-NULL) to store and return the expanded filename
          for those redirections that take one
        - do_redirections: pass a char ** (&fn) to do_redirection_internal to
          get a pointer to the expanded filename; pass it to redirection_error
          if appropriate. Free FN in any case, since do_redirection_internal
          won't. Fix for double expansion of filename in certain redirections
          reported by OÄuz <oguzismailuysal@gmail.com>

                                    6/4
                                    ---
parse.y
        - parse_comsub: while we're reading a here-document, don't perform any
          history expansion (set history_expansion_inhibited). Fixes issue
          reported by "ladyrick" <ladyrick@qq.com>

general.h,parse.y
        - __P -> PARAMS

shell.c
        - shellstart: struct timeval used to initialize shell starting time;
          shell_start_time now initialized from shellstart.tv_sec

variables.c
        - assign_seconds: reset shellstart to set shell starting time

pcomplete.c
        - include posixtime.h instead of <sys/time.h>

lib/sh/{ufuncs,uconvert}.c
        - include posixtime.h instead of the inline conditional includes

aclocal.m4
        - BUSH_STRUCT_TIMEVAL: convert to use AC_COMPILE_IFELSE instead of the
          deprecated AC_HEADER_EGREP

posixtime.h
        - struct timeval: if HAVE_TIMEVAL is not defined, provide a replacement
          definition

lib/sh/gettimeofday.c
        - gettimeofday: replacement function, so we don't have to use
          HAVE_GETTIMEOFDAY in the rest of the code

                                    6/5
                                    ---
{lots of files}.[ch]
builtins/{lots of files}.{c,h,def}
lib/glob/{lots of files}.[ch]
lib/malloc/{lots of files}.[ch]
lib/sh/{lots of files}.c
include/{lots of files}.h
examples/loadables/{lots of files}.c
        - __P -> PARAMS

doc/{bush.1,bushref.texi}
        - SECONDS: clarify that the number of seconds is always determined by
          querying the system clock

                                    6/8
                                    ---
configure.ac
        - if CFLAGS is not supplied in the environment or on the command line,
          add the gcc options that suppress warnings about parens and print
          formats in a slightly different way that will avoid some collisions

lib/readline/readline.c
        - _rl_dispatch_subseq: don't set rl_last_func to rl_vi_arg_digit, just
          the same as if it were rl_digit_argument. This allows functions like
          rl_yank_last_arg, which behave differently when called multiple times
          in a row, to work closer to what is expected. This allows what
          Leo Alekseyev <dnquark@gmail.com> reported to work, with caveats

lib/readline/vi_mode.c
        - rl_vi_yank_arg: make sure to pass `key' to rl_yank_nth_arg, in case
          it needs to use it later
        - rl_vi_redo: suppress attempts to redo `.' when the current keymap is
          vi_movement_keymap, since that will recursively call vi_redo

                                   6/11
                                   ----
redir.c
        - limit HEREDOC_PIPESIZE to 4096 on FreeBSD; that is where it can
          handle atomic writes without hanging. Tested on FreeBSD 13

[bush-5.1-alpha frozen]

                                   6/15
                                   ----
subst.c
        - do_assignment_internal: call stupidly_hack_special_variables on the
          name returned from the variable assignment, in case there was a
          nameref expansion, and on the original name only if the assignment
          returned NULL. Fixes bug reported by James D. Lin <jamesdlin@gmail.com>

                                   6/16
                                   ----
builtins/hash.def
        - hash_builtin: don't print anything if the hash table is empty when
          listing portably (-l) unless the shell compatibility level is <= 50
          Issue originally raised by <beluro@web.de>

                                   6/17
                                   ----
pathexp.c
        - glob_name_is_acceptable: extend GLOBIGNORE to ignore `.' and `..'
          as a terminal pathname component instead of just ignoring filenames
          that are `.' or `..'. From a suggestion by Ilkka Virta
          <itvirta@iki.fi>

                                   6/18
                                   ----
po/Makefile.in.in
        - MKINSTALLDIRS: deprecated, no longer in AM_INTL_SUBDIR, so we have
          to create the variable manually

lib/readline/doc/rltech.texi
        - add descriptions of the active mark functions that are available to
          applications. I guess they will remain public

subst.c
        - valid_parameter_transform: new function, reject transformations
          longer than a single character or invalid transformation operators
        - parameter_brace_transform: call valid_parameter_transform

                                   6/22
                                   ----
lib/sh/zread.c
        - lbuf: bump size up to ZBUFSIZ (default 4096). From a report by
          Jason A. Donenfeld <Jason@zx2c4.com>

lib/sh/zcatfd.c
        - zcatfd: lbuf: bump size up to ZBUFSIZ (default 4096)

lib/sh/zmapfd.c
        - zmapfd: lbuf: bump size up to ZBUFSIZ (default 4096)

                                   6/29
                                   ----
aclocal.m4
        - BUSH_FUNC_SBRK: changes for cross-compiling on FreeBSD variants,
          from Jessica Clarke <jrtc27@jrtc27.com>

xmalloc.c
        - HAVE_SBRK: use #if instead of #ifdef so we only use it if we think
          it works

examples/loadables/finfo.c
        - st_dev,st_nlink: cast to unsigned long, report from Jessica Clarke
          <jrtc27@jrtc27.com> 

unwind_prot.c
        - unwind_protect_mem_internal: make sure we allocate at least as many
          bytes for an entire UNWIND_ELT. Fix from Jessica Clarke
          <jrtc27@jrtc27.com>

                                    7/1
                                    ---
eval.c
        - alrm_catcher: use write(2) instead of fprintf to print the
          auto-logout message to the terminal

jobs.c
        - UNQUEUE_SIGCHLD: set queue_sigchld to 1 around call to waitchld(),
          since it is not being called from a signal handler and so SIGCHLD is
          not blocked. Fixes report by Godmar Back <godmar@gmail.com>

                                    7/2
                                    ---
doc/{bush.1,bushref.texi}
        - read: clarify that without any name arguments, the line assigned to
          REPLY is not modified. From a question by M. Nejat AYDIN
          <mnaydin@yahoo.com> with input from Eli Schwartz
          <eschwartz@archlinux.org>

                                    7/5
                                    ---
lib/readline/vi_mode.c
        - _rl_vi_done_inserting: make sure to close out all undo groups when
          leaving insert mode, so we don't have anything dangling.
          Report and fix from David Fries <David@Fries.net>

                                    7/6
                                    ---
lib/readline/vi_mode.c
        - _rl_vi_domove_motion_cleanup: the `c' and `C' commands should enter
          insert mode even if the motion command doesn't delete any text.
          From a report by David Fries <David@Fries.net>
        - _rl_vi_done_inserting: add a missing rl_end_undo_group when
          _rl_vi_doing_insert is set: there should be one begun by
          rl_vi_start_inserting and one begun by the command (change or replace).
          From a report by David Fries <David@Fries.net>
        - rl_vi_replace: set _rl_vi_last_key_before_insert to 'R' explicitly,
          since other code checks that and we want to allow users to rebind
          this function

                                    7/7
                                    ---
lib/readline/vi_mode.c
        - rl_vi_{delete,change,yank}_to: if we have a non-null _rl_vimvcxt,
          just reinitialize it so we don't have to allocate a new one. This is
          a change primarily for callback mode, and fixes a memory leak

builtins/evalstring.c
        - optimize_shell_function: try to optimize away the fork in the last
          command in a shell function body, under certain conditions

execute_cmd.c
        - execute_function: attempt to optimize away forks in a shell function
          that is already marked NO_FORK and being executed in a command
          substitution

                                    7/8
                                    ---
{jobs,nojobs,trap,unwind_prot}.c,lib/malloc/{malloc,table}.c
        - interrupt_immediately: remove, no longer used

jobs.c
        - waitchld: don't perform asynchronous notification if we are currently
          executing a builtin (executing_builtin != 0). Inspired by a report
          from Godmar Back <godmar@gmail.com>

                                    7/9
                                    ---
lib/readline/signals.c
        - _rl_handle_signal: block SIGTTOU while handling a SIGTTOU, since we
          no longer run this in a signal handling context where SIGTTOIU would
          be blocked

                                   7/14
                                   ----
execute_cmd.c
        - execute_simple_command: use new variable `cmdflags' instead of using
          simple_command->flags directly; initialize from simple_command->flags
        - check_command_builtin: take a simple command list of words starting
          with `command' and including a command_word argument, and peel off
          the `command' and any instances of `-p' and `--' and return the
          updated list
        - execute_simple_command: if the first word of the simple command is
          `command', call check_command_builtin to peel off any `command' and
          `-p' and `--' and go on to execute the rest of the words as a simple
          command. If we're in posix mode, we've got the special builtins
          handled before this runs. Fixes complaint about `command' in the
          background running an extra bush process from Dmitry Alexandrov
          <dag@gnui.org>

                                   7/17
                                   ----
doc/bush.1
lib/readline/doc/{rltech,hstech,rluser}.texi
lib/readline/doc/{readline,history}.3
        - a few small tweaks to make the language gender-neutral

                                   7/18
                                   ----
subst.c
        - expand_word_internal: case `:' make sure the shell is either not in
          posix mode or W_TILDEEXP is set before turning on W_ITILDE. The old
          code would turn it on unconditionally if the W_ASSIGNMENT flag was
          set. Fixes bug reported by OÄuz <oguzismailuysal@gmail.com>

                                   7/20
                                   ----
builtins/complete.def
        - replace macros used to print compspec actions, options, and other
          info with a small set of functions that traverse the structs used
          to hold that information and print everything instead of eumerating
          each option and action separately. From a patch submitted by
          Martin Kealey <martin@kurahaupo.gen.nz>

                                   7/27
                                   ----
variables.c
        - push_posix_tempvar_internal: restore $SHELLOPTS after restoring the
          values of shell options saved by `local -' by calling set_shellopts().
          Report from Grisha Levit <grishalevit@gmail.com>

flags.c
        - reset_shell_flags: set histexp_flag to 0 and let bush_history_reinit
          take care of setting history_expansion appropriately. Report and fix
          from Grisha Levit <grishalevit@gmail.com>

                                   7/28
                                   ----
general.c
        - assignment: if (FLAGS & 1), we are parsing the contents of a compound
          assignment, and a word must begin with a `[' and have a valid
          subscript terminated by `]' before the `=' to be considered an
          assignment statemen and subsequently expanded like one. Report from 
          Alexey Izbyshev <izbyshev@ispras.ru>

                                   7/30
                                   ----
lib/glob/sm_loop.c
        - BRACKMATCH: if the bracket expression is matching simple characters
          and not a range, compare the character from the string and the
          pattern directly, as required by Posix interp 948

lib/glob/smatch.c
        - charcmp_wc: split off code that calls wcscoll from rangecmp_wc,
          just return the results of wcscoll
        - rangecmp_wc: call charcmp_wc and impose a total ordering
          by performing a byte comparison (or wint_t comparison) of C1 and C2
          as required by Posix interp 948 (charcmp_wc takes care of the
          behavior of FORCECOLL)
        - collequiv_wc: call charcmp_wc instead of rangecmp_wc
        - charcmp: character comparison code from rangecmp
        - rangecmp: call charcmp and impose total ordering as required by
          Posix interp 948
        - collequiv: call charcmp instead of rangecmp
        - _fnmatch_fallback: ASCII version of fallback for equivalence classes
          when there are no multibyte characters in the pattern; just calls
          fnmatch with a reconstructed equivalence class pattern
        - collequiv: call _fnmatch_fallback if charcmp returns non-zero and
          the configure check indicates fnmatch has character class support.
          Fixes issue reported by Harald van Dijk <harald@gigawatt.nl>

                                    8/2
                                    ---
lib/readline/signals.c
        - _rl_handle_signal: since we're not called in a signal handler context
          any more, we don't need to explicitly unblock the signal we received
          so the application's signal handler will get it when we resend the
          signal to ourselves. It doesn't hurt anything to do it, but we don't
          have to
        - _rl_handle_signal: Set up a framework for any signals that need to
          be blocked during cleanup: add the signal to SET (initialized to the
          existing set of blocked signals) and set BLOCK_SIG to 1. We block
          that set around the call to rl_cleanup_after_signal().
        - _rl_handle_signal: on AIX, if the signal is SIGHUP, make sure we
          block SIGHUP while running rl_cleanup_after_signal()

                                    8/3
                                    ---
jobs.c
        - start_job: don't allow `fg' or `bg' in a command substitution to
          attempt to start a parent's jobs. Suggested by  OÄuz 
          <oguzismailuysal@gmail.com>

builtins/set.def
        - set_current_options: only call change_flag or SET_BINARY_O_OPTION_VALUE
          if the value has changed from what is stored in the bitmap, to avoid
          any side effects from setting the options and save time on any
          unnecessary function calls. Inspired by report from Grisha Levit
          <grishalevit@gmail.com>

parse.y
        - xparse_dolparen: before we jump to top level, check whether we are
          still reading from the string (we might have run all the unwind-
          protects) and turn off PST_CMDSUBST if we are not. Fixes fuzzing
          bug reported by Jakub Wilk <jwilk@jwilk.net>

                                    8/4
                                    ---
subst.c
        - process_substitute: set subshell_environment to include SUBSHELL_ASYNC
          in the child process, since we passed FORK_ASYNC to make_child. Fixes
          DEBUG trap problem reported by Jonathan Rascher <jon@bcat.name>

subst.c
        - unlink_all_fifos: new function, just unconditionally closes and
          unlinks (if using FIFOs) each pipe used for process substitution.
          There is an open to unblock any child processes sleeping on the
          FIFO first. Inspired by a suggestion from "CHIGOT, CLEMENT"
          <clement.chigot@atos.net>

shell.c
        - exit_shell: call unlink_all_fifos() instead of unlink_fifo_list()

sig.c
        - termsig_handler: call unlink_all_fifos() instead of
          unlink_fifo_list()

                                    8/5
                                    ---
arrayfunc.c
        - quote_compound_array_list: turn empty strings into '' instead of
          leaving them unmodified. Fixes bug in changes from 4/29 reported
          by andy_bush <andy_bush@objectmail.com>

                                   8/10
                                   ----
bushline.c
        - edit_and_execute_command,bush_execute_unix_command: restore the bush
          signal handlers before running parse_and_execute() so bush will catch
          and handle signals, instead of letting readline catch them without
          any opportunity to run _rl_handle_signal(). Fixes bug reported by
          Stan Marsh <gazelle@xmission.com>

                                   8/11
                                   ----
builtins/fc.def
        - fc_gethnum: return HIST_INVALID for -0 if not in listing mode
        - fc_builtin: throw an out-of-range error if histbeg or histend gets
          set to HIST_INVALID
        - fc_builtin: don't throw errors for other out-of-range history
          specifications, clamp them at the beginning or end of the history
          list, as appropriate, per POSIX. Report and fix from Martijn Dekker
          <martijn@inlv.org>

                                   8/12
                                   ----
builtins/fc.def
        - fc_gethnum: return HIST_NOTFOUND (new error) if the string is not a
          number and doesn't correspond to any command in the history list
        - fc_builtin: print a "no command found" error message if fc_gethnum
          returns HIST_NOTFOUND

                                   8/14
                                   ----
flags.c
        - no_invisible_vars: removed undocumented `-I' flag

{flags,variables}.c,flags.h,builtins/{declare,setattr.def}
        - no_invisible_vars: remove all references

command.h
        - PF_ALLINDS: new flag, means to expand an array variable name without
          a subscript as if it were subscripted by `@' instead of `0'

subst.c
        - parameter_brace_expand_word: if PFLAGS contains PF_ALLINDS, expand
          an array variable name as if it were subscripted by "@" instead of
          0/"0": a string with the element values separated by " ". Little
          nuance; we're just interested in whether or not there are any
          values at all
        - parameter_brace_expand: if we are expanding something like ${foo@a},
          pass PF_ALLINDS to parameter_brace_expand_word and
          parameter_brace_expand_indir so we don't get tripped up on `nounset'
          if foo has an assigned subscript other than 0/"0". Inspired by a
          report from Andrew Neff <andrew.neff@visionsystemsinc.com>

                                   8/17
                                   ----
bushhist.c
        - bush_add_history,maybe_add_history: don't need to call shell_comment
          if we are in the middle of adding a here-document, since it may
          call the parser recursively on data that is not guaranteed to be
          valid input. From a report by Hyunho Cho <mug896@gmail.com>

                                   8/24
                                   ----
lib/readline/complete.c
        - compare_match: compare TEXT from the line buffer and MATCH, a
          possible completion for TEXT, after dequoting TEXT if necessary
        - rl_complete_internal,rl_menu_complete : if show-all-if-unmodified is
          set, use compare_match instead of a straight strcmp to determine if
          the match has changed the text to complete, so we can use it for
          filenames that require quoting. Report and pointer to fix from
          Abon B <gnuabonbon@gmail.com>

                                   8/25
                                   ----
eval.c
        - execute_prompt_command: PROMPT_COMMAND can now be an array, subsuming
          PROMPT_COMMANDS, which bush no longer looks for. Prompted by a
          suggestion from Martijn Dekker <martijn@inlv.org>

                                   8/26
                                   ----
builtins/fc.def
        - fc_gethnum: now takes a flags word as the third argument, with two
          current flag values: HN_LISTING, which means we are listing history
          entries, and HN_FIRST, which means we are parsing the first in a
          first,last range of history entries
        - fc_gethnum: if we have a number >= 0, and it's out of range, return
          different values (0 or last history) depending on whether we are
          parsing the first or last in a range argument. Based on a report from
          Martijn Dekker <martijn@inlv.org>

                                   8/31
                                   ----
parse.y
        - grammar: call handle_eof_input_unit from the eof-after-error
          production only from interactive top-level shells, so a syntax error
          in `eval' doesn't exit an interactive shell. Report and fix from
          Koichi Murase <myoga.murase@gmail.com>

bushline.c
        - bush_execute_unix_command: if we call parse_and_execute with allocated
          memory, make sure not to include SEVAL_NOFREE in the flags so it will
          free that command string before returning. Report and fix from
          Koichi Murase <myoga.murase@gmail.com>

array.[ch]
        - array_to_argv: now takes a second argument: COUNTP; returns the number
          of elements stored in the strvec
        - array_to_argv: don't store array elements with null values; it makes
          it hard for callers to walk the whole array reliably

pcomplete.c
        - gen_shell_function_matches: change call to array_to_argv

array.h
        - execute_array_command: now takes the entire ARRAY * as the first
          parameter

eval.c
        - execute_array_command: now takes the entire array, puts the elements
          into a strvec, and executes each element of the strvevc as a command.
          This protects against a command from PROMPT_COMMAND[n] unsetting the
          corresponding element of PROMPT_COMMAND.
          From a report from Koichi Murase <myoga.murase@gmail.com>

                                    9/7
                                    ---
[bush-5.1-beta frozen]

                                    9/8
                                    ---
lib/readline/display.c
        - _rl_update_final: don't bother doing anything if the line structures
          have not been initialized. Report and fix from gary@catalyst.net.nz

variables.c
        - get_histcmd: perform the same adjustment as in prompt_history_number;
          make sure to subtract one if we're doing this while executing a
          command that has already been saved to the history list. Inspired
          by a report from L A Walsh <bush@tlinx.org>

                                   9/14
                                   ----
aclocal.m4
        - BUSH_STRUCT_WEXITSTATUS_OFFSET: fix typo in loop condition reported
          by Andreas K. Hüttel <dilfridge@gentoo.org>

syntax.h
        - slashify_in_here_document: restore previous value that doesn't
          include double quote, since it's only special in certain cases

subst.c
        - expand_word_internal: when processing backslash-double quote inside
          a ${...} construct inside a here documemt, treat it the same as if
          it were double-quoted, as posix says. Fixes report from
          Andreas Schwab <schwab@linux-m68k.org>

                                   9/15
                                   ----
support/signames.c
        - added a number of more esoteric signal names from AIX and Solaris

parse.y
        - report_syntax_error: make sure that the exit status is only set to
          one of the special builtin exit statuses if we are really executing
          a builtin here, not just if parse_and_execute_level > 0. Reported by
          Rob Landley <rob@landley.net>

execute_cmd.c
        - EX_BADSYNTAX: make sure that gets translated into EX_BADUSAGE (2)
        - execute_simple_command: if a function returns a value greater than
          EX_SHERRBASE, use builtin_status to translate it, as if a builtin
          were being executed
        - builtin_status: make sure a status > EX_SHERRBASE gets translated to
          EXECUTION_FAILURE

                                   9/21
                                   ----
subst.c
        - process_substitute: set up input from /dev/null (standard for an
          asynchronous process) only if the shell is interactive and reading
          input from the terminal. This allows scripts to use process
          substitution to filter stdin. From a report from
          Andreas Schwab <schwab@linux-m68k.org>

                                   9/23
                                   ----
doc/{bush.1,bushref.texi}
        - ENV: a couple of changes clarifying that it's only used when an
          interactive shell is started in posix mode. Report from
          Reuben Thomas <rrt@sc3d.org>

examples/loadables/asort.c
        - asort: loadable builtin to sort an array. Contributed by
          Geir Hauge <geir.hauge@gmail.com>

                                   10/1
                                   ----

[bush-5.1-rc1 frozen]

                                   10/7
                                   ----
subst.c
        - process_substitute: try it without setting the stdin for a process
          substitution started from an interactive shell to /dev/null. We will
          have to see if this causes problems like those reported back in
          9/2019 by Grisha Levit. From a report by Hyunho Cho <mug896@gmail.com>

lib/readline/terminal.c
        - _rl_init_terminal_io: if the terminal is unknown, disable bracketed
          paste on the assumption it can't handle the enable/disable escape
          sequences

                                   10/8
                                   ----
lib/readline/terminal.c
        - _rl_init_terminal_io: if the terminal name is "dumb", disable
          bracketed paste mode. Suggested by
          Andreas Schwab <schwab@linux-m68k.org>

                                   10/13
                                   -----
trap.[ch]
        - set_trap_state: new function to allow other signal handlers to set
          the internal state that trap_handler would set to note that the
          shell received a trapped signal. Used by sigint_sighandler().

sig.c
        - sigint_sighandler: call set_trap_state to set the pending trap state
          for SIGINT if trap_handler is not called. Needed because
          throw_to_top_level now checks whether a signal is pending before
          running the trap (change from 4/2020)

builtins/trap.def
        - trap_builtin: if the shell is interactive (interactive_shell != 0)
          but running something like PROMPT_COMMAND that sets
          parse_and_execute_level > 0 but interactive == 0, make sure to set
          the signal handler to the default interactive shell SIGINT handler
          (sigint_sighandler) instead of the default non-interactive one.
          Fixes bug reported by Daniel Farina <daniel@fdr.io> with a hint
          from felix <felix@f-hauri.ch>

                                   10/26
                                   -----

lib/readline/{readline.c,rlprivate.h}
        - _rl_enable_active_region: new variable, mirrors value of
          _rl_enable_bracketed_paste
        - BRACKETED_PASTE_DEFAULT: new define, default initial value of
          _rl_enable_bracketed_paste and _rl_enable_active_region

lib/readline/bind.c
        - hack_special_boolean_var: make sure that _rl_enable_active_region
          is set appropriately when "enable-bracketed-paste" is modified

lib/readline/isearch.c
        - _rl_isearch_dispatch: make sure that we activate the mark on finding
          the search string only if _rl_enable_active_region is non-zero, even
          if bracketed paste is enabled

lib/readline/search.c
        - noninc_dosearch: make sure that we activate the mark on finding
          the search string only if _rl_enable_active_region is non-zero, even
          if bracketed paste is enabled

lib/readline/kill.c
        - rl_bracketed_paste_begin: make sure we activate the mark only if
          _rl_enable_active_region is enabled

lib/readline/isearch.c
        - _rl_isearch_dispatch: the requirement for number of available unread
          characters (bytes) to trigger the bracketed paste test is now
          BRACK_PASTE_SLEN-1, like for non-incremental searches

                                   10/29
                                   -----

doc/bush.1,lib/readline/rluser.texi
        - enable-bracketed-paste: change to note the the current default is `On'

                                   10/30
                                   -----
lib/glob/glob.c
        - wdequote_pathname: if wcsrtombs fails, make sure to check whether it
          leaves wpathname set to a non-NULL value before checking whether or
          not *wpathname is a null character (indicating an incomplete
          conversion). Fixes https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=972286
          with an assist from Bernhard Übelacker <bernhardu@mailbox.org>

                                   11/1
                                   ----
lib/readline/isearch.c
        - _rl_isearch_dispatch: when checking whether the current character is
          one of the isearch `opcodes', only check the multibyte character
          member of CXT if we're currently running in a multibyte locale. Don't
          assume that other parts of the code will set mb[0] = c and mb[1] = 0.
          Report from Detlef Vollmann <dv@vollmann.ch>

[bush-5.1-rc2 frozen]

                                   11/10
                                   -----
lib/readline/isearch.c
        - _rl_isearch_dispatch: if we are aborting the search, make sure to
          call _rl_fix_point and to make sure the point and mark are less
          than the new rl_end, in case they got out of sync. Report and fix
          from Tillmann Osswald <tosswald@ernw.de>

test.c
        - unary_test: assume the argument has already been expanded (the code
          paths for [[ and [ expand it) and add AV_NOEXPAND to the flags passed
          to array_value if assoc_expand_once is enabled. Prompted by a report
          from Greg Wooledge <wooledg@eeg.ccf.org>

[bush-5.1-rc3 frozen]

                                   11/18
                                   -----
doc/{bush.1,bushref.texi}
        - small tweaks to the ulimit description to make it more consistent with
          the Posix standard's terminology

                                   12/4
                                   ----

[bush-5.1-release frozen]