BASH PATCH REPORT
=================
Bash-Release: 3.2
Patch-ID: bash32-014
Bug-Reported-by: Brett Stahlman <brettstahlman@comcast.net>
Bug-Reference-ID: <000701c72d29$a227e0e0$5ec7cf47@computerroom>
Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2006-12/msg00065.html
Bug-Description:
Bash mishandles word splitting under certain circumstances when IFS is
null (IFS=). Constructs affected include ${param/pat/sub} and others
when expanding arrays (array[@]).
Patch:
*** ../bash-3.2-patched/array.c Wed Jun 1 16:39:22 2005
--- array.c Mon Jan 15 22:58:00 2007
***************
*** 121,125 ****
}
- #ifdef INCLUDE_UNUSED
/*
* Make and return a new array composed of the elements in array A from
--- 121,124 ----
***************
*** 142,146 ****
n = array_create_element (element_index(p), element_value(p));
ADD_BEFORE(a->head, n);
! mi = element_index(ae);
}
a->num_elements = i;
--- 141,145 ----
n = array_create_element (element_index(p), element_value(p));
ADD_BEFORE(a->head, n);
! mi = element_index(n);
}
a->num_elements = i;
***************
*** 148,152 ****
return a;
}
- #endif
/*
--- 147,150 ----
***************
*** 301,304 ****
--- 299,319 ----
}
+ ARRAY *
+ array_quote_escapes(array)
+ ARRAY *array;
+ {
+ ARRAY_ELEMENT *a;
+ char *t;
+
+ if (array == 0 || array_head(array) == 0 || array_empty(array))
+ return (ARRAY *)NULL;
+ for (a = element_forw(array->head); a != array->head; a = element_forw(a)) {
+ t = quote_escapes (a->value);
+ FREE(a->value);
+ a->value = t;
+ }
+ return array;
+ }
+
/*
* Return a string whose elements are the members of array A beginning at
***************
*** 312,318 ****
int starsub, quoted;
{
ARRAY_ELEMENT *h, *p;
arrayind_t i;
! char *ifs, sep[2];
p = a ? array_head (a) : 0;
--- 327,334 ----
int starsub, quoted;
{
+ ARRAY *a2;
ARRAY_ELEMENT *h, *p;
arrayind_t i;
! char *ifs, sep[2], *t;
p = a ? array_head (a) : 0;
***************
*** 337,340 ****
--- 353,363 ----
;
+ a2 = array_slice(a, h, p);
+
+ if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))
+ array_quote(a2);
+ else
+ array_quote_escapes(a2);
+
if (starsub && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) {
ifs = getifs();
***************
*** 344,348 ****
sep[1] = '\0';
! return (array_to_string_internal (h, p, sep, quoted));
}
--- 367,374 ----
sep[1] = '\0';
! t = array_to_string (a2, sep, 0);
! array_dispose(a2);
!
! return t;
}
***************
*** 368,372 ****
if (mflags & MATCH_QUOTED)
! array_quote (a2);
if (mflags & MATCH_STARSUB) {
ifs = getifs();
--- 394,400 ----
if (mflags & MATCH_QUOTED)
! array_quote(a2);
! else
! array_quote_escapes(a2);
if (mflags & MATCH_STARSUB) {
ifs = getifs();
*** ../bash-3.2-patched/array.h Sun Jun 1 15:50:30 2003
--- array.h Mon Jan 15 22:35:35 2007
***************
*** 56,59 ****
--- 56,60 ----
extern int array_shift_element __P((ARRAY *, char *));
extern ARRAY *array_quote __P((ARRAY *));
+ extern ARRAY *array_quote_escapes __P((ARRAY *));
extern char *array_subrange __P((ARRAY *, arrayind_t, arrayind_t, int, int));
*** ../bash-3.2-patched/subst.c Fri Mar 2 16:20:50 2007
--- subst.c Tue Mar 6 11:40:55 2007
***************
*** 1888,1892 ****
--- 1889,1899 ----
#endif
+ /* XXX -- why call quote_list if ifs == 0? we can get away without doing
+ it now that quote_escapes quotes spaces */
+ #if 0
tlist = ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (ifs && *ifs == 0))
+ #else
+ tlist = (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))
+ #endif
? quote_list (list)
: list_quote_escapes (list);
***************
*** 2922,2926 ****
/* Quote escape characters in string s, but no other characters. This is
used to protect CTLESC and CTLNUL in variable values from the rest of
! the word expansion process after the variable is expanded. */
char *
quote_escapes (string)
--- 2935,2944 ----
/* Quote escape characters in string s, but no other characters. This is
used to protect CTLESC and CTLNUL in variable values from the rest of
! the word expansion process after the variable is expanded. If IFS is
! null, we quote spaces as well, just in case we split on spaces later
! (in the case of unquoted $@, we will eventually attempt to split the
! entire word on spaces). Corresponding code exists in dequote_escapes.
! Even if we don't end up splitting on spaces, quoting spaces is not a
! problem. */
char *
quote_escapes (string)
***************
*** 2930,2933 ****
--- 2948,2952 ----
size_t slen;
char *result, *send;
+ int quote_spaces;
DECLARE_MBSTATE;
***************
*** 2935,2938 ****
--- 2954,2958 ----
send = string + slen;
+ quote_spaces = (ifs_value && *ifs_value == 0);
t = result = (char *)xmalloc ((slen * 2) + 1);
s = string;
***************
*** 2940,2944 ****
while (*s)
{
! if (*s == CTLESC || *s == CTLNUL)
*t++ = CTLESC;
COPY_CHAR_P (t, s, send);
--- 2960,2964 ----
while (*s)
{
! if (*s == CTLESC || *s == CTLNUL || (quote_spaces && *s == ' '))
*t++ = CTLESC;
COPY_CHAR_P (t, s, send);
***************
*** 2982,2985 ****
--- 3002,3006 ----
size_t slen;
char *result, *send;
+ int quote_spaces;
DECLARE_MBSTATE;
***************
*** 2996,3002 ****
return (strcpy (result, s));
while (*s)
{
! if (*s == CTLESC && (s[1] == CTLESC || s[1] == CTLNUL))
{
s++;
--- 3017,3024 ----
return (strcpy (result, s));
+ quote_spaces = (ifs_value && *ifs_value == 0);
while (*s)
{
! if (*s == CTLESC && (s[1] == CTLESC || s[1] == CTLNUL || (quote_spaces && s[1] == ' ')))
{
s++;
***************
*** 4462,4466 ****
RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, DEFAULT_ARRAY_SIZE);
! if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || c == CTLESC || c == CTLNUL)
istring[istring_index++] = CTLESC;
--- 4498,4510 ----
RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, DEFAULT_ARRAY_SIZE);
! /* This is essentially quote_string inline */
! if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) /* || c == CTLESC || c == CTLNUL */)
! istring[istring_index++] = CTLESC;
! /* Escape CTLESC and CTLNUL in the output to protect those characters
! from the rest of the word expansions (word splitting and globbing.)
! This is essentially quote_escapes inline. */
! else if (c == CTLESC)
! istring[istring_index++] = CTLESC;
! else if (c == CTLNUL || (c == ' ' && (ifs_value && *ifs_value == 0)))
istring[istring_index++] = CTLESC;
***************
*** 5552,5555 ****
--- 5610,5616 ----
rely on array_subrange to understand how to deal with them). */
tt = array_subrange (array_cell (v), e1, e2, starsub, quoted);
+ #if 0
+ /* array_subrange now calls array_quote_escapes as appropriate, so the
+ caller no longer needs to. */
if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) == 0)
{
***************
*** 5558,5561 ****
--- 5619,5623 ----
}
else
+ #endif
temp = tt;
break;
***************
*** 5808,5811 ****
--- 5870,5876 ----
case VT_ARRAYVAR:
temp = array_patsub (array_cell (v), p, rep, mflags);
+ #if 0
+ /* Don't need to do this anymore; array_patsub calls array_quote_escapes
+ as appropriate before adding the space separators. */
if (temp && (mflags & MATCH_QUOTED) == 0)
{
***************
*** 5814,5817 ****
--- 5879,5883 ----
temp = tt;
}
+ #endif
break;
#endif
*** ../bash-3.2/patchlevel.h Thu Apr 13 08:31:04 2006
--- patchlevel.h Mon Oct 16 14:22:54 2006
***************
*** 26,30 ****
looks for to find the patch level (for the sccs version string). */
! #define PATCHLEVEL 13
#endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
looks for to find the patch level (for the sccs version string). */
! #define PATCHLEVEL 14
#endif /* _PATCHLEVEL_H_ */