Bash-4.2 Official Patch 32

[Chet Ramey]

                             BASH PATCH REPORT
                             =================

Bash-Release:   4.2
Patch-ID:       bash42-032

Bug-Reported-by:        Ruediger Kuhlmann <RKuhlmann@orga-systems.com>
Bug-Reference-ID:       
<OFDE975207.0C3622E5-ONC12579F3.00361A06-C12579F3.00365E39@orga-systems.com>
Bug-Reference-URL:      
http://lists.gnu.org/archive/html/bug-bash/2012-05/msg00010.html

Bug-Description:

Bash-4.2 has problems with DEL characters in the expanded value of variables
used in the same quoted string as variables that expand to nothing.

Patch (apply with `patch -p0'):

*** ../bash-20120427/subst.c    2012-04-22 16:19:10.000000000 -0400
--- subst.c     2012-05-07 16:06:35.000000000 -0400
***************
*** 8152,8155 ****
--- 8152,8163 ----
          dispose_word_desc (tword);
  
+         /* Kill quoted nulls; we will add them back at the end of
+            expand_word_internal if nothing else in the string */
+         if (had_quoted_null && temp && QUOTED_NULL (temp))
+           {
+             FREE (temp);
+             temp = (char *)NULL;
+           }
+ 
          goto add_string;
          break;
***************
*** 8556,8560 ****
        if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
        tword->flags |= W_QUOTED;
!       if (had_quoted_null)
        tword->flags |= W_HASQUOTEDNULL;
        list = make_word_list (tword, (WORD_LIST *)NULL);
--- 8564,8568 ----
        if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
        tword->flags |= W_QUOTED;
!       if (had_quoted_null && QUOTED_NULL (istring))
        tword->flags |= W_HASQUOTEDNULL;
        list = make_word_list (tword, (WORD_LIST *)NULL);
***************
*** 8587,8591 ****
          if (word->flags & W_NOEXPAND)
            tword->flags |= W_NOEXPAND;
!         if (had_quoted_null)
            tword->flags |= W_HASQUOTEDNULL;    /* XXX */
          list = make_word_list (tword, (WORD_LIST *)NULL);
--- 8595,8599 ----
          if (word->flags & W_NOEXPAND)
            tword->flags |= W_NOEXPAND;
!         if (had_quoted_null && QUOTED_NULL (istring))
            tword->flags |= W_HASQUOTEDNULL;    /* XXX */
          list = make_word_list (tword, (WORD_LIST *)NULL);
*** ../bash-4.2-patched/patchlevel.h    Sat Jun 12 20:14:48 2010
--- patchlevel.h        Thu Feb 24 21:41:34 2011
***************
*** 26,30 ****
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 31
  
  #endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 32
  
  #endif /* _PATCHLEVEL_H_ */

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/