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BASH PATCH REPORT
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=================
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Bash-Release: 4.2
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Patch-ID: bash42-028
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Bug-Reported-by: Mark Edgar <medgar123@gmail.com>
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Bug-Reference-ID: <CABHMh_3d+ZgO_zaEtYXPwK4P7tC0ghZ4g=Ue_TRpsEMf5YDsqw@mail.gmail.com>
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Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2012-03/msg00109.html
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Bug-Description:
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When using a word expansion for which the right hand side is evaluated,
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certain expansions of quoted null strings include spurious ^? characters.
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Patch (apply with `patch -p0'):
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*** ../bash-4.2-patched/subst.c 2012-03-11 17:35:13.000000000 -0400
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--- subst.c 2012-03-20 19:30:13.000000000 -0400
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***************
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*** 5810,5813 ****
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--- 5810,5823 ----
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if (qdollaratp && ((hasdol && quoted) || l->next))
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*qdollaratp = 1;
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+ /* If we have a quoted null result (QUOTED_NULL(temp)) and the word is
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+ a quoted null (l->next == 0 && QUOTED_NULL(l->word->word)), the
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+ flags indicate it (l->word->flags & W_HASQUOTEDNULL), and the
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+ expansion is quoted (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
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+ (which is more paranoia than anything else), we need to return the
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+ quoted null string and set the flags to indicate it. */
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+ if (l->next == 0 && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && QUOTED_NULL(temp) && QUOTED_NULL(l->word->word) && (l->word->flags & W_HASQUOTEDNULL))
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+ {
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+ w->flags |= W_HASQUOTEDNULL;
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+ }
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dispose_words (l);
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}
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*** ../bash-4.2-patched/patchlevel.h Sat Jun 12 20:14:48 2010
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--- patchlevel.h Thu Feb 24 21:41:34 2011
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***************
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*** 26,30 ****
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looks for to find the patch level (for the sccs version string). */
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! #define PATCHLEVEL 27
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#endif /* _PATCHLEVEL_H_ */
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--- 26,30 ----
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looks for to find the patch level (for the sccs version string). */
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! #define PATCHLEVEL 28
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#endif /* _PATCHLEVEL_H_ */
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