components/shell/bash/patches/bash52-004.patch

   1                              BASH PATCH REPORT
   2                              =================
   3
   4 Bash-Release:   5.2
   5 Patch-ID:       bash52-004
   6
   7 Bug-Reported-by:        Antoine <bug-bash@glitchimini.net>
   8 Bug-Reference-ID:       <8bd59753-05ff-9b09-2337-2c7f52ded650@glitchimini.net>
   9 Bug-Reference-URL:      https://lists.gnu.org/archive/html/bug-bash/2022-10/msg00022.html
  10
  11 Bug-Description:
  12
  13 Bash needs to keep better track of nested brace expansions to avoid problems
  14 with quoting and POSIX semantics.
  15
  16 Patch (apply with `patch -p0'):
  17
  18 *** ../bash-5.2-patched/subst.c 2022-10-05 10:22:02.000000000 -0400
  19 --- subst.c     2022-10-06 15:19:08.000000000 -0400
  20 ***************
  21 *** 1799,1802 ****
  22 --- 1804,1810 ----
  23   }
  24
  25 + #define PARAMEXPNEST_MAX      32      // for now
  26 + static int dbstate[PARAMEXPNEST_MAX];
  27 +
  28   /* Extract a parameter expansion expression within ${ and } from STRING.
  29      Obey the Posix.2 rules for finding the ending `}': count braces while
  30 ***************
  31 *** 1829,1832 ****
  32 --- 1837,1842 ----
  33       return (extract_heredoc_dolbrace_string (string, sindex, quoted, flags));
  34
  35 +   dbstate[0] = dolbrace_state;
  36 +
  37     pass_character = 0;
  38     nesting_level = 1;
  39 ***************
  40 *** 1853,1856 ****
  41 --- 1863,1868 ----
  42         if (string[i] == '$' && string[i+1] == LBRACE)
  43         {
  44 +         if (nesting_level < PARAMEXPNEST_MAX)
  45 +           dbstate[nesting_level] = dolbrace_state;
  46           nesting_level++;
  47           i += 2;
  48 ***************
  49 *** 1865,1868 ****
  50 --- 1877,1881 ----
  51           if (nesting_level == 0)
  52             break;
  53 +         dolbrace_state = (nesting_level < PARAMEXPNEST_MAX) ? dbstate[nesting_level] : dbstate[0];    /* Guess using initial state */
  54           i++;
  55           continue;
  56 *** ../bash-5.2/patchlevel.h    2020-06-22 14:51:03.000000000 -0400
  57 --- patchlevel.h        2020-10-01 11:01:28.000000000 -0400
  58 ***************
  59 *** 26,30 ****
  60      looks for to find the patch level (for the sccs version string). */
  61
  62 ! #define PATCHLEVEL 3
  63
  64   #endif /* _PATCHLEVEL_H_ */
  65 --- 26,30 ----
  66      looks for to find the patch level (for the sccs version string). */
  67
  68 ! #define PATCHLEVEL 4
  69
  70   #endif /* _PATCHLEVEL_H_ */