summaryrefslogtreecommitdiffstats
path: root/source/a/bash/bash-5.0-patches/bash50-003
blob: f7e5677e540e83987066d4497ed6bfcf40dd32c5 (about) (plain) (blame)
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
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
			     BASH PATCH REPORT
			     =================

Bash-Release:	5.0
Patch-ID:	bash50-003

Bug-Reported-by:	Andrew Church <achurch+bash@achurch.org>
Bug-Reference-ID:	<5c534aa2.04371@msgid.achurch.org>
Bug-Reference-URL:	http://lists.gnu.org/archive/html/bug-bash/2019-01/msg00276.html

Bug-Description:

There are several incompatibilities in how bash-5.0 processes pathname
expansion (globbing) of filename arguments that have backslashes in the
directory portion.

Patch (apply with `patch -p0'):

*** ../bash-5.0-patched/lib/glob/glob_loop.c	2019-01-16 16:13:21.000000000 -0500
--- lib/glob/glob_loop.c	2019-02-01 09:45:11.000000000 -0500
***************
*** 27,34 ****
    register const GCHAR *p;
    register GCHAR c;
!   int bopen;
  
    p = pattern;
!   bopen = 0;
  
    while ((c = *p++) != L('\0'))
--- 27,34 ----
    register const GCHAR *p;
    register GCHAR c;
!   int bopen, bsquote;
  
    p = pattern;
!   bopen = bsquote = 0;
  
    while ((c = *p++) != L('\0'))
***************
*** 56,66 ****
        case L('\\'):
  	/* Don't let the pattern end in a backslash (GMATCH returns no match
! 	   if the pattern ends in a backslash anyway), but otherwise return 1,
! 	   since the matching engine uses backslash as an escape character
! 	   and it can be removed. */
! 	return (*p != L('\0'));
        }
  
!   return 0;
  }
  
--- 56,75 ----
        case L('\\'):
  	/* Don't let the pattern end in a backslash (GMATCH returns no match
! 	   if the pattern ends in a backslash anyway), but otherwise note that 
! 	   we have seen this, since the matching engine uses backslash as an
! 	   escape character and it can be removed. We return 2 later if we
! 	   have seen only backslash-escaped characters, so interested callers
! 	   know they can shortcut and just dequote the pathname. */
! 	if (*p != L('\0'))
! 	  {
! 	    p++;
! 	    bsquote = 1;
! 	    continue;
! 	  }
! 	else 	/* (*p == L('\0')) */
! 	  return 0;
        }
  
!   return bsquote ? 2 : 0;
  }
  
*** ../bash-5.0-patched/lib/glob/glob.h	2013-10-28 14:46:12.000000000 -0400
--- lib/glob/glob.h	2019-03-07 11:06:47.000000000 -0500
***************
*** 31,34 ****
--- 31,35 ----
  #define GX_ADDCURDIR	0x200	/* internal -- add passed directory name */
  #define GX_GLOBSTAR	0x400	/* turn on special handling of ** */
+ #define GX_RECURSE	0x800	/* internal -- glob_filename called recursively */
  
  extern int glob_pattern_p __P((const char *));
*** ../bash-5.0-patched/lib/glob/glob.c	2018-09-20 10:53:23.000000000 -0400
--- lib/glob/glob.c	2019-03-07 14:23:43.000000000 -0500
***************
*** 1062,1066 ****
    unsigned int directory_len;
    int free_dirname;			/* flag */
!   int dflags;
  
    result = (char **) malloc (sizeof (char *));
--- 1078,1082 ----
    unsigned int directory_len;
    int free_dirname;			/* flag */
!   int dflags, hasglob;
  
    result = (char **) malloc (sizeof (char *));
***************
*** 1111,1117 ****
      }
  
    /* If directory_name contains globbing characters, then we
!      have to expand the previous levels.  Just recurse. */
!   if (directory_len > 0 && glob_pattern_p (directory_name))
      {
        char **directories, *d, *p;
--- 1127,1136 ----
      }
  
+   hasglob = 0;
    /* If directory_name contains globbing characters, then we
!      have to expand the previous levels.  Just recurse.
!      If glob_pattern_p returns != [0,1] we have a pattern that has backslash
!      quotes but no unquoted glob pattern characters. We dequote it below. */
!   if (directory_len > 0 && (hasglob = glob_pattern_p (directory_name)) == 1)
      {
        char **directories, *d, *p;
***************
*** 1176,1180 ****
  	d[directory_len - 1] = '\0';
  
!       directories = glob_filename (d, dflags);
  
        if (free_dirname)
--- 1195,1199 ----
  	d[directory_len - 1] = '\0';
  
!       directories = glob_filename (d, dflags|GX_RECURSE);
  
        if (free_dirname)
***************
*** 1333,1336 ****
--- 1352,1369 ----
  	  return (NULL);
  	}
+       /* If we have a directory name with quoted characters, and we are
+ 	 being called recursively to glob the directory portion of a pathname,
+ 	 we need to dequote the directory name before returning it so the
+ 	 caller can read the directory */
+       if (directory_len > 0 && hasglob == 2 && (flags & GX_RECURSE) != 0)
+ 	{
+ 	  dequote_pathname (directory_name);
+ 	  directory_len = strlen (directory_name);
+ 	}
+ 
+       /* We could check whether or not the dequoted directory_name is a
+ 	 directory and return it here, returning the original directory_name
+ 	 if not, but we don't do that yet. I'm not sure it matters. */
+ 
        /* Handle GX_MARKDIRS here. */
        result[0] = (char *) malloc (directory_len + 1);
*** ../bash-5.0-patched/pathexp.c	2018-04-29 17:44:48.000000000 -0400
--- pathexp.c	2019-01-31 20:19:41.000000000 -0500
***************
*** 66,74 ****
    register int c;
    char *send;
!   int open;
  
    DECLARE_MBSTATE;
  
!   open = 0;
    send = string + strlen (string);
  
--- 66,74 ----
    register int c;
    char *send;
!   int open, bsquote;
  
    DECLARE_MBSTATE;
  
!   open = bsquote = 0;
    send = string + strlen (string);
  
***************
*** 101,105 ****
  	   globbing. */
  	case '\\':
! 	  return (*string != 0);
  	 	  
  	case CTLESC:
--- 101,112 ----
  	   globbing. */
  	case '\\':
! 	  if (*string != '\0' && *string != '/')
! 	    {
! 	      bsquote = 1;
! 	      string++;
! 	      continue;
! 	    }
! 	  else if (*string == 0)
! 	    return (0);
  	 	  
  	case CTLESC:
***************
*** 118,122 ****
  #endif
      }
!   return (0);
  }
  
--- 125,130 ----
  #endif
      }
! 
!   return (bsquote ? 2 : 0);
  }
  
*** ../bash-5.0-patched/bashline.c	2019-01-16 16:13:21.000000000 -0500
--- bashline.c	2019-02-22 09:29:08.000000000 -0500
***************
*** 3753,3757 ****
  
  	case '\\':
! 	  if (*string == 0)
  	    return (0);	 	  
  	}
--- 3766,3770 ----
  
  	case '\\':
! 	  if (*string++ == 0)
  	    return (0);	 	  
  	}
*** ../bash-5.0/patchlevel.h	2016-06-22 14:51:03.000000000 -0400
--- patchlevel.h	2016-10-01 11:01:28.000000000 -0400
***************
*** 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_ */