1 Here is an overview of the source code organization for ksh93.
5 The directory include contains header files for ksh93.
6 The files nval.h and shell.h are intended to be public
7 headers and can be used to add runtime builtin command.
8 The remainder are private.
10 The directory data contains readonly data files for ksh93.
11 The man pages for built-ins are in builtins.c rather
12 than included as statics with the implementations in the
13 bltins directory because some systems don't make static const
14 data readonly and we want these to be shared by all running
17 The directory edit contains the code for command line
20 The fun directory contains some shell function such as
21 pushd, popd, and dirs.
23 The directory features contains files that are used to generate
24 header files in the FEATURE directory. Most of these files
25 are in a format that is processed by iffe.
27 The directory bltins contains code for most of the built-in
28 commands. Additional built-in commands are part of libcmd.
30 The directory sh contains most of the code for ksh93.
32 The directory tests contains a number of regression tests.
33 In most cases, when a bug gets fixed, a test is added to
34 one of these files. The regression tests can be run by
35 going to this directory and running
36 SHELL=shell_path shell_path shtests
37 where shell_path is an absolute pathname for the shell to
40 The top level directory contains the nmake Makefile, a README,
41 and several documentation files. The RELEASE file contains
42 the list of bug fixes and new features since the original
43 ksh93 release. The file COMPATIBILITY is a list of all
44 known incompatibilities with ksh88.
46 The bash_pre_rc.sh is a startup script used when emulating
47 bash if the shell is compiled with SHOPT_BASH and the shell
48 is invoked as bash. The bash emulation is not complete.
51 1. argnod.h contains the type definitions for command
52 nodes, io nodes, argument nodes, and for positional
53 parameters.a It defines the prototypes for
54 all the positional parameters functions.
55 2. builtins.h contains prototypes for builtins as well
56 as symbolic constants that refer to the name-pairs
57 that are associated with some of the built-ins.
58 It also contains prototypes for many of the strings.
59 3. defs.h is the catch all for all definitions that
60 don't fit elsewhere and it includes several other
61 headers. It defines a strucuture that contains ksh
62 global data, sh, and a structure that contains per
64 4. edit.h contains definitions that are common to both
65 vi and emacs edit modes.
66 5. env.h contains interfaces for creating and modifying
67 environment variables.
68 6. fault.h contains prototypes for signal related
69 functions and trap and fault handling.
70 7. fcin.h contains macro and function definitions for
71 reading from a file or string.
72 8. history.h contains macros and functions definitions
73 related to history file processing.
74 9. jobs.h contains the definitions relating to job
75 processing and control.
76 10. lexstates.h contains the states associated with
78 11. name.h contains the internal definitions related
79 to name-value pair processing.
80 12. national.h contains a few I18N definitions, mostly
82 13. nval.h is the public interface to the name-value
83 pair library that is documented with nval.3.
84 14. path.h contains the interface for pathname processing
85 and pathname searching.
86 15. shell.h is the public interface for shell functions
87 that are documented int shell.3.
88 16. shlex.h contains the lexical token definitions and
89 interfaces for lexical analysis.
90 17. shnodes.h contains the definition of the structures
91 for each of the parse nodes and flags for the attributes.
92 18. shtable.h contains some interfaces and functions for
94 19. streval.h contains the interface to the arithmetic
96 20. terminal.h is a header file that includes the appropriate
98 21. test.h contains the definitions for the test and [[...]]
100 22. timeout.h contains the define constant for the maximum
102 23. ulimit.h includes the appropriate resource header.
103 24. variables.h contains symbolic constants for the built-in
107 1. args.c contains functions for parsing shell options
108 and for processing positional parameters.
109 2. arith.c contains callback functions for the streval.c
110 library and the interface to shell arithmetic.
111 3. array.c contains the code for indexed and associative
113 4. bash.h contains code used when compiling with SHOPT_BASH
114 to add bash specific features such as shopt.
115 5. defs.c contains the data definitions for global symbols.
116 6. deparse.c contains code to generate shell script from
118 7. env.c contains code to add and delete environment variables
119 to an environment list.
120 8. expand.c contains code for file name expansion and
121 file name generation.
122 9. fault.c contains code for signal processing, trap
123 handling and termination.
124 10. fcin.c contains code for reading and writing a character
125 at a time from a file or string.
126 11. init.c contains initialization code and callbacks
127 for get and set functions for built-in variables.
128 12. io.o contains code for redirections and managing file
129 descriptors and file streams.
130 13. jobs.c contains the code for job management.
131 14. lex.c contains the code for the lexical analyzer.
132 15. macro.c contains code for the $ macro expansions, including
134 16. main.c contains the calls to initialization, profile
135 processing and the main evaluation loop as well as
137 17. name.c contains the name-value pair routines that are
138 built on the hash library in libast.
139 18. nvdisc.c contains code related to name-value pair disciplines.
140 19. nvtree.c contains code for compound variables and for
141 walking the namespace.
142 20. nvtype.c contains most of the code related to types that
143 are created with typeset -T.
144 21. parse.c contains the code for the shell parser.
145 22. path.c contains the code for pathname lookup and
146 some path functions. It also contains the code
147 that executes commands and scripts.
148 23. pmain.c is just a calls sh_main() so that all of the
149 rest of the shell can be in a shared library.
150 24. shcomp.c contains the main program to the shell
151 compiler. This program parses a script and creates
152 a file that the shell can read containing the parse tree.
153 25. streval.c is an C arithmetic evaluator.
154 26. string.c contains some string related functions.
155 27. subshell.c contains the code to save and restore
156 environments so that subshells can run without creating
158 28. suid_exec.c contains the program from running execute
159 only and/or setuid/setgid scripts.
160 29. tdump.c contains the code to dump a parse tree into
162 30. timers.c contains code for multiple event timeouts.
163 31. trestore contians the code for restoring the parse
164 tree from the file created by tdump.
165 32. userinit.c contains a dummy userinit() function.
166 This is now obsolete with the new version of sh_main().
167 33. waitevent.c contains the sh_waitnotify function so
168 that builtins can handle processing events when the
169 shell is waiting for input or for process completion.
170 34. xec.c is the main shell executuion loop.