1 /* Copyright (C) 1998-2021 Free Software Foundation, Inc.
2    This file is part of the GNU C Library.
3 
4    The GNU C Library is free software; you can redistribute it and/or
5    modify it under the terms of the GNU Lesser General Public
6    License as published by the Free Software Foundation; either
7    version 2.1 of the License, or (at your option) any later version.
8 
9    The GNU C Library is distributed in the hope that it will be useful,
10    but WITHOUT ANY WARRANTY; without even the implied warranty of
11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12    Lesser General Public License for more details.
13 
14    You should have received a copy of the GNU Lesser General Public
15    License along with the GNU C Library.  If not, see
16    <https://www.gnu.org/licenses/>.  */
17 
18 /* This file contains only wrappers around the real glob functions.  It
19    became necessary since the glob_t structure changed.  */
20 #include <sys/types.h>
21 #include <glob.h>
22 #include <shlib-compat.h>
23 
24 #if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
25 
26 /* This is the old structure.  The difference is that the gl_pathc and
27    gl_offs elements have type `int'.  */
28 typedef struct
29   {
30     int gl_pathc;		/* Count of paths matched by the pattern.  */
31     char **gl_pathv;		/* List of matched pathnames.  */
32     int gl_offs;		/* Slots to reserve in `gl_pathv'.  */
33     int gl_flags;		/* Set to FLAGS, maybe | GLOB_MAGCHAR.  */
34 
35     /* If the GLOB_ALTDIRFUNC flag is set, the following functions
36        are used instead of the normal file access functions.  */
37     void (*gl_closedir) (void *);
38     struct dirent *(*gl_readdir) (void *);
39     void *(*gl_opendir) (const char *);
40     int (*gl_lstat) (const char *, struct stat *);
41     int (*gl_stat) (const char *, struct stat *);
42   } old_glob_t;
43 
44 
45 int
46 attribute_compat_text_section
__old_glob(const char * pattern,int flags,int (* errfunc)(const char *,int),old_glob_t * pglob)47 __old_glob (const char *pattern, int flags,
48 	    int (*errfunc) (const char *, int),
49 	    old_glob_t *pglob)
50 {
51   glob_t correct;
52   int result;
53 
54   /* Construct an object of correct type.  */
55   correct.gl_pathc = pglob->gl_pathc;
56   correct.gl_pathv = pglob->gl_pathv;
57   correct.gl_offs = pglob->gl_offs;
58   correct.gl_flags = pglob->gl_flags;
59   correct.gl_closedir = pglob->gl_closedir;
60   correct.gl_readdir = pglob->gl_readdir;
61   correct.gl_opendir = pglob->gl_opendir;
62   /* Set gl_lstat and gl_stat for both gl_stat for compatibility with old
63      implementation that did not follow dangling symlinks.  */
64   correct.gl_lstat = pglob->gl_stat;
65   correct.gl_stat = pglob->gl_stat;
66 
67   result = glob (pattern, flags, errfunc, &correct);
68 
69   /* And convert it back.  */
70   pglob->gl_pathc = correct.gl_pathc;
71   pglob->gl_pathv = correct.gl_pathv;
72   pglob->gl_offs = correct.gl_offs;
73   pglob->gl_flags = correct.gl_flags;
74   pglob->gl_closedir = correct.gl_closedir;
75   pglob->gl_readdir = correct.gl_readdir;
76   pglob->gl_opendir = correct.gl_opendir;
77   /* Only need to restore gl_stat.  */
78   pglob->gl_stat = correct.gl_stat;
79 
80   return result;
81 }
82 compat_symbol (libc, __old_glob, glob, GLIBC_2_0);
83 
84 
85 /* Free storage allocated in PGLOB by a previous `glob' call.  */
86 void
87 attribute_compat_text_section
__old_globfree(old_glob_t * pglob)88 __old_globfree (old_glob_t *pglob)
89 {
90   glob_t correct;
91 
92   /* We only need these two symbols.  */
93   correct.gl_pathc = pglob->gl_pathc;
94   correct.gl_pathv = pglob->gl_pathv;
95   correct.gl_offs = pglob->gl_offs;
96 
97   globfree (&correct);
98 }
99 compat_symbol (libc, __old_globfree, globfree, GLIBC_2_0);
100 
101 #endif
102