1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
BASH PATCH REPORT
=================
Bash-Release: 3.2
Patch-ID: bash32-010
Bug-Reported-by: Ryan Waldron <rew@erebor.com>
Bug-Reference-ID: <20070119065603.546D011E9C@kansas.erebor.com>
Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2007-01/msg00059.html
Bug-Description:
The glibc implementation of regcomp/regexec does not allow backslashes to
escape "ordinary" pattern characters when matching. Bash used backslashes
to quote all characters when the pattern argument to the [[ special
command's =~ operator was quoted. This caused the match to fail on Linux
and other systems using GNU libc.
Patch:
*** ../bash-3.2.9/pathexp.h Sat Feb 19 17:23:18 2005
--- bash-3.2/pathexp.h Wed Jan 31 22:53:16 2007
***************
*** 1,5 ****
/* pathexp.h -- The shell interface to the globbing library. */
! /* Copyright (C) 1987-2005 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
--- 1,5 ----
/* pathexp.h -- The shell interface to the globbing library. */
! /* Copyright (C) 1987-2007 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
***************
*** 33,36 ****
--- 33,37 ----
#define QGLOB_CVTNULL 0x01 /* convert QUOTED_NULL strings to '\0' */
#define QGLOB_FILENAME 0x02 /* do correct quoting for matching filenames */
+ #define QGLOB_REGEXP 0x04 /* quote an ERE for regcomp/regexec */
#if defined (EXTENDED_GLOB)
*** ../bash-3.2.9/pathexp.c Mon May 6 13:43:05 2002
--- bash-3.2/pathexp.c Mon Feb 26 16:59:23 2007
***************
*** 1,5 ****
/* pathexp.c -- The shell interface to the globbing library. */
! /* Copyright (C) 1995-2002 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
--- 1,5 ----
/* pathexp.c -- The shell interface to the globbing library. */
! /* Copyright (C) 1995-2007 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
***************
*** 111,114 ****
--- 111,141 ----
}
+ /* Return 1 if C is a character that is `special' in a POSIX ERE and needs to
+ be quoted to match itself. */
+ static inline int
+ ere_char (c)
+ int c;
+ {
+ switch (c)
+ {
+ case '.':
+ case '[':
+ case '\\':
+ case '(':
+ case ')':
+ case '*':
+ case '+':
+ case '?':
+ case '{':
+ case '|':
+ case '^':
+ case '$':
+ return 1;
+ default:
+ return 0;
+ }
+ return (0);
+ }
+
/* PATHNAME can contain characters prefixed by CTLESC; this indicates
that the character is to be quoted. We quote it here in the style
***************
*** 143,146 ****
--- 170,175 ----
if ((qflags & QGLOB_FILENAME) && pathname[i+1] == '/')
continue;
+ if ((qflags & QGLOB_REGEXP) && ere_char (pathname[i+1]) == 0)
+ continue;
temp[j++] = '\\';
i++;
*** ../bash-3.2.9/subst.c Tue Nov 7 16:14:41 2006
--- bash-3.2/subst.c Wed Jan 31 23:09:58 2007
***************
*** 5,9 ****
beauty, but, hey, you're alright.'' */
! /* Copyright (C) 1987-2006 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
--- 5,9 ----
beauty, but, hey, you're alright.'' */
! /* Copyright (C) 1987-2007 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
***************
*** 2647,2655 ****
/* This needs better error handling. */
/* Expand W for use as an argument to a unary or binary operator in a
! [[...]] expression. If SPECIAL is nonzero, this is the rhs argument
to the != or == operator, and should be treated as a pattern. In
! this case, we quote the string specially for the globbing code. The
! caller is responsible for removing the backslashes if the unquoted
! words is needed later. */
char *
cond_expand_word (w, special)
--- 2647,2656 ----
/* This needs better error handling. */
/* Expand W for use as an argument to a unary or binary operator in a
! [[...]] expression. If SPECIAL is 1, this is the rhs argument
to the != or == operator, and should be treated as a pattern. In
! this case, we quote the string specially for the globbing code. If
! SPECIAL is 2, this is an rhs argument for the =~ operator, and should
! be quoted appropriately for regcomp/regexec. The caller is responsible
! for removing the backslashes if the unquoted word is needed later. */
char *
cond_expand_word (w, special)
***************
*** 2659,2662 ****
--- 2660,2664 ----
char *r, *p;
WORD_LIST *l;
+ int qflags;
if (w->word == 0 || w->word[0] == '\0')
***************
*** 2673,2678 ****
else
{
p = string_list (l);
! r = quote_string_for_globbing (p, QGLOB_CVTNULL);
free (p);
}
--- 2675,2683 ----
else
{
+ qflags = QGLOB_CVTNULL;
+ if (special == 2)
+ qflags |= QGLOB_REGEXP;
p = string_list (l);
! r = quote_string_for_globbing (p, qflags);
free (p);
}
*** ../bash-3.2.9/execute_cmd.c Sat Aug 26 00:23:17 2006
--- bash-3.2/execute_cmd.c Wed Jan 31 23:12:06 2007
***************
*** 1,5 ****
/* execute_cmd.c -- Execute a COMMAND structure. */
! /* Copyright (C) 1987-2005 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
--- 1,5 ----
/* execute_cmd.c -- Execute a COMMAND structure. */
! /* Copyright (C) 1987-2007 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
***************
*** 2547,2551 ****
if (arg1 == 0)
arg1 = nullstr;
! arg2 = cond_expand_word (cond->right->op, patmatch||rmatch);
if (arg2 == 0)
arg2 = nullstr;
--- 2547,2551 ----
if (arg1 == 0)
arg1 = nullstr;
! arg2 = cond_expand_word (cond->right->op, rmatch ? 2 : (patmatch ? 1 : 0));
if (arg2 == 0)
arg2 = nullstr;
*** ../bash-3.2/patchlevel.h Thu Apr 13 08:31:04 2006
--- bash-3.2/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 9
#endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
looks for to find the patch level (for the sccs version string). */
! #define PATCHLEVEL 10
#endif /* _PATCHLEVEL_H_ */
|
