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+ BASH PATCH REPORT
+ =================
+
+Bash-Release: 4.2
+Patch-ID: bash42-003
+
+Bug-Reported-by: Clark J. Wang <dearvoid@gmail.com>
+Bug-Reference-ID: <AANLkTikZ_rVV-frR8Fh0PzhXnMKnm5XsUR-F3qtPPs5G@mail.gmail.com>
+Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2011-02/msg00136.html
+
+Bug-Description:
+
+When using the pattern replacement and pattern removal word expansions, bash
+miscalculates the possible match length in the presence of an unescaped left
+bracket without a closing right bracket, resulting in a failure to match
+the pattern.
+
+Patch (apply with `patch -p0'):
+
+*** ../bash-4.2-patched/lib/glob/gmisc.c 2011-02-05 16:11:17.000000000 -0500
+--- lib/glob/gmisc.c 2011-02-18 23:53:42.000000000 -0500
+***************
+*** 78,83 ****
+ size_t wmax;
+ {
+! wchar_t wc, *wbrack;
+! int matlen, t, in_cclass, in_collsym, in_equiv;
+
+ if (*wpat == 0)
+--- 78,83 ----
+ size_t wmax;
+ {
+! wchar_t wc;
+! int matlen, bracklen, t, in_cclass, in_collsym, in_equiv;
+
+ if (*wpat == 0)
+***************
+*** 119,123 ****
+ case L'[':
+ /* scan for ending `]', skipping over embedded [:...:] */
+! wbrack = wpat;
+ wc = *wpat++;
+ do
+--- 119,123 ----
+ case L'[':
+ /* scan for ending `]', skipping over embedded [:...:] */
+! bracklen = 1;
+ wc = *wpat++;
+ do
+***************
+*** 125,140 ****
+ if (wc == 0)
+ {
+! matlen += wpat - wbrack - 1; /* incremented below */
+! break;
+ }
+ else if (wc == L'\\')
+ {
+! wc = *wpat++;
+! if (*wpat == 0)
+! break;
+ }
+ else if (wc == L'[' && *wpat == L':') /* character class */
+ {
+ wpat++;
+ in_cclass = 1;
+ }
+--- 125,148 ----
+ if (wc == 0)
+ {
+! wpat--; /* back up to NUL */
+! matlen += bracklen;
+! goto bad_bracket;
+ }
+ else if (wc == L'\\')
+ {
+! /* *wpat == backslash-escaped character */
+! bracklen++;
+! /* If the backslash or backslash-escape ends the string,
+! bail. The ++wpat skips over the backslash escape */
+! if (*wpat == 0 || *++wpat == 0)
+! {
+! matlen += bracklen;
+! goto bad_bracket;
+! }
+ }
+ else if (wc == L'[' && *wpat == L':') /* character class */
+ {
+ wpat++;
++ bracklen++;
+ in_cclass = 1;
+ }
+***************
+*** 142,145 ****
+--- 150,154 ----
+ {
+ wpat++;
++ bracklen++;
+ in_cclass = 0;
+ }
+***************
+*** 147,152 ****
+ {
+ wpat++;
+ if (*wpat == L']') /* right bracket can appear as collating symbol */
+! wpat++;
+ in_collsym = 1;
+ }
+--- 156,165 ----
+ {
+ wpat++;
++ bracklen++;
+ if (*wpat == L']') /* right bracket can appear as collating symbol */
+! {
+! wpat++;
+! bracklen++;
+! }
+ in_collsym = 1;
+ }
+***************
+*** 154,157 ****
+--- 167,171 ----
+ {
+ wpat++;
++ bracklen++;
+ in_collsym = 0;
+ }
+***************
+*** 159,164 ****
+ {
+ wpat++;
+ if (*wpat == L']') /* right bracket can appear as equivalence class */
+! wpat++;
+ in_equiv = 1;
+ }
+--- 173,182 ----
+ {
+ wpat++;
++ bracklen++;
+ if (*wpat == L']') /* right bracket can appear as equivalence class */
+! {
+! wpat++;
+! bracklen++;
+! }
+ in_equiv = 1;
+ }
+***************
+*** 166,174 ****
+--- 184,196 ----
+ {
+ wpat++;
++ bracklen++;
+ in_equiv = 0;
+ }
++ else
++ bracklen++;
+ }
+ while ((wc = *wpat++) != L']');
+ matlen++; /* bracket expression can only match one char */
++ bad_bracket:
+ break;
+ }
+***************
+*** 214,219 ****
+ size_t max;
+ {
+! char c, *brack;
+! int matlen, t, in_cclass, in_collsym, in_equiv;
+
+ if (*pat == 0)
+--- 236,241 ----
+ size_t max;
+ {
+! char c;
+! int matlen, bracklen, t, in_cclass, in_collsym, in_equiv;
+
+ if (*pat == 0)
+***************
+*** 255,259 ****
+ case '[':
+ /* scan for ending `]', skipping over embedded [:...:] */
+! brack = pat;
+ c = *pat++;
+ do
+--- 277,281 ----
+ case '[':
+ /* scan for ending `]', skipping over embedded [:...:] */
+! bracklen = 1;
+ c = *pat++;
+ do
+***************
+*** 261,276 ****
+ if (c == 0)
+ {
+! matlen += pat - brack - 1; /* incremented below */
+! break;
+ }
+ else if (c == '\\')
+ {
+! c = *pat++;
+! if (*pat == 0)
+! break;
+ }
+ else if (c == '[' && *pat == ':') /* character class */
+ {
+ pat++;
+ in_cclass = 1;
+ }
+--- 283,306 ----
+ if (c == 0)
+ {
+! pat--; /* back up to NUL */
+! matlen += bracklen;
+! goto bad_bracket;
+ }
+ else if (c == '\\')
+ {
+! /* *pat == backslash-escaped character */
+! bracklen++;
+! /* If the backslash or backslash-escape ends the string,
+! bail. The ++pat skips over the backslash escape */
+! if (*pat == 0 || *++pat == 0)
+! {
+! matlen += bracklen;
+! goto bad_bracket;
+! }
+ }
+ else if (c == '[' && *pat == ':') /* character class */
+ {
+ pat++;
++ bracklen++;
+ in_cclass = 1;
+ }
+***************
+*** 278,281 ****
+--- 308,312 ----
+ {
+ pat++;
++ bracklen++;
+ in_cclass = 0;
+ }
+***************
+*** 283,288 ****
+ {
+ pat++;
+ if (*pat == ']') /* right bracket can appear as collating symbol */
+! pat++;
+ in_collsym = 1;
+ }
+--- 314,323 ----
+ {
+ pat++;
++ bracklen++;
+ if (*pat == ']') /* right bracket can appear as collating symbol */
+! {
+! pat++;
+! bracklen++;
+! }
+ in_collsym = 1;
+ }
+***************
+*** 290,293 ****
+--- 325,329 ----
+ {
+ pat++;
++ bracklen++;
+ in_collsym = 0;
+ }
+***************
+*** 295,300 ****
+ {
+ pat++;
+ if (*pat == ']') /* right bracket can appear as equivalence class */
+! pat++;
+ in_equiv = 1;
+ }
+--- 331,340 ----
+ {
+ pat++;
++ bracklen++;
+ if (*pat == ']') /* right bracket can appear as equivalence class */
+! {
+! pat++;
+! bracklen++;
+! }
+ in_equiv = 1;
+ }
+***************
+*** 302,310 ****
+--- 342,354 ----
+ {
+ pat++;
++ bracklen++;
+ in_equiv = 0;
+ }
++ else
++ bracklen++;
+ }
+ while ((c = *pat++) != ']');
+ matlen++; /* bracket expression can only match one char */
++ bad_bracket:
+ break;
+ }
+*** ../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 2
+
+ #endif /* _PATCHLEVEL_H_ */
+--- 26,30 ----
+ looks for to find the patch level (for the sccs version string). */
+
+! #define PATCHLEVEL 3
+
+ #endif /* _PATCHLEVEL_H_ */