Mercurial > hg > octave-nkf > gnulib-hg

annotate lib/same.c @ 16846:a80d21de5373

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
system-quote, execute, spawn-pipe: Escape '?' on Windows. * lib/system-quote.c (SHELL_SPECIAL_CHARS, CMD_SPECIAL_CHARS): Add the '?' character. * lib/w32spawn.h (SHELL_SPECIAL_CHARS): Likewise. * tests/test-system-quote-main.c (check_all): Check also strings like "??????????". Reported by Eli Zaretskii <eliz@gnu.org>.
author Bruno Haible <bruno@clisp.org>
date Fri, 11 May 2012 01:39:04 +0200
parents 8250f2777afc
children e542fd46ad6f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2092
0cf0dc1ce656 add copyright/no-warranty comment
Jim Meyering <jim@meyering.net>
parents: 1857
diff changeset
1 /* Determine whether two file names refer to the same file.
5135
46d5c1c09035 (same_name): Return bool, not int.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4910
diff changeset
2
16201
8250f2777afc maint: update all copyright year number ranges
Jim Meyering <meyering@redhat.com>
parents: 14079
diff changeset
3 Copyright (C) 1997-2000, 2002-2006, 2009-2012 Free Software Foundation, Inc.
2092
0cf0dc1ce656 add copyright/no-warranty comment
Jim Meyering <jim@meyering.net>
parents: 1857
diff changeset
4
9309
bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+.
Bruno Haible <bruno@clisp.org>
parents: 7302
diff changeset
5 This program is free software: you can redistribute it and/or modify
2092
0cf0dc1ce656 add copyright/no-warranty comment
Jim Meyering <jim@meyering.net>
parents: 1857
diff changeset
6 it under the terms of the GNU General Public License as published by
9309
bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+.
Bruno Haible <bruno@clisp.org>
parents: 7302
diff changeset
7 the Free Software Foundation; either version 3 of the License, or
bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+.
Bruno Haible <bruno@clisp.org>
parents: 7302
diff changeset
8 (at your option) any later version.
2092
0cf0dc1ce656 add copyright/no-warranty comment
Jim Meyering <jim@meyering.net>
parents: 1857
diff changeset
9
0cf0dc1ce656 add copyright/no-warranty comment
Jim Meyering <jim@meyering.net>
parents: 1857
diff changeset
10 This program is distributed in the hope that it will be useful,
0cf0dc1ce656 add copyright/no-warranty comment
Jim Meyering <jim@meyering.net>
parents: 1857
diff changeset
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
0cf0dc1ce656 add copyright/no-warranty comment
Jim Meyering <jim@meyering.net>
parents: 1857
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
0cf0dc1ce656 add copyright/no-warranty comment
Jim Meyering <jim@meyering.net>
parents: 1857
diff changeset
13 GNU General Public License for more details.
0cf0dc1ce656 add copyright/no-warranty comment
Jim Meyering <jim@meyering.net>
parents: 1857
diff changeset
14
0cf0dc1ce656 add copyright/no-warranty comment
Jim Meyering <jim@meyering.net>
parents: 1857
diff changeset
15 You should have received a copy of the GNU General Public License
9309
bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+.
Bruno Haible <bruno@clisp.org>
parents: 7302
diff changeset
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
2092
0cf0dc1ce656 add copyright/no-warranty comment
Jim Meyering <jim@meyering.net>
parents: 1857
diff changeset
17
0cf0dc1ce656 add copyright/no-warranty comment
Jim Meyering <jim@meyering.net>
parents: 1857
diff changeset
18 /* written by Jim Meyering */
0cf0dc1ce656 add copyright/no-warranty comment
Jim Meyering <jim@meyering.net>
parents: 1857
diff changeset
19
7302
8a1a9361108c * _fpending.c: Include <config.h> unconditionally, since we no
Paul Eggert <eggert@cs.ucla.edu>
parents: 6912
diff changeset
20 #include <config.h>
1857
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
21
4910
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
22 #include <stdbool.h>
1857
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
23 #include <stdio.h>
6275
fd0ccce602e4 Sync from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6259
diff changeset
24 #include <unistd.h>
4674
092d9a2797a7 Remove K&R cruft.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4367
diff changeset
25 #include <stdlib.h>
1857
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
26 #include <sys/types.h>
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
27 #include <sys/stat.h>
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
28 #include <ctype.h>
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
29 #include <errno.h>
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
30
4674
092d9a2797a7 Remove K&R cruft.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4367
diff changeset
31 #include <string.h>
2671
db2d95fa362f Include <string.h> or <strings.h>, as appropriate, for declaration of strcmp.
Jim Meyering <jim@meyering.net>
parents: 2293
diff changeset
32
4910
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
33 #include <limits.h>
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
34 #ifndef _POSIX_NAME_MAX
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
35 # define _POSIX_NAME_MAX 14
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
36 #endif
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
37
1857
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
38 #include "same.h"
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
39 #include "dirname.h"
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
40 #include "error.h"
6912
314715e0260d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
41 #include "same-inode.h"
1857
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
42
5491
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5135
diff changeset
43 #ifndef MIN
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5135
diff changeset
44 # define MIN(a, b) ((a) < (b) ? (a) : (b))
b3d5c90efc81 Merge from coreutils for getcwd and HP-UX 11.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5135
diff changeset
45 #endif
4910
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
46
1857
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
47 /* Return nonzero if SOURCE and DEST point to the same name in the same
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
48 directory. */
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
49
5135
46d5c1c09035 (same_name): Return bool, not int.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4910
diff changeset
50 bool
1857
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
51 same_name (const char *source, const char *dest)
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
52 {
4367
14fb4216a9b3 Merge from coreutils.
Jim Meyering <jim@meyering.net>
parents: 4181
diff changeset
53 /* Compare the basenames. */
6912
314715e0260d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
54 char const *source_basename = last_component (source);
314715e0260d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 6275
diff changeset
55 char const *dest_basename = last_component (dest);
4367
14fb4216a9b3 Merge from coreutils.
Jim Meyering <jim@meyering.net>
parents: 4181
diff changeset
56 size_t source_baselen = base_len (source_basename);
14fb4216a9b3 Merge from coreutils.
Jim Meyering <jim@meyering.net>
parents: 4181
diff changeset
57 size_t dest_baselen = base_len (dest_basename);
4910
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
58 bool identical_basenames =
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
59 (source_baselen == dest_baselen
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
60 && memcmp (source_basename, dest_basename, dest_baselen) == 0);
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
61 bool compare_dirs = identical_basenames;
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
62 bool same = false;
1857
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
63
4910
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
64 #if ! _POSIX_NO_TRUNC && HAVE_PATHCONF && defined _PC_NAME_MAX
5907
c47674a83a78 Sync from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 5848
diff changeset
65 /* This implementation silently truncates components of file names. If
4910
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
66 the base names might be truncated, check whether the truncated
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
67 base names are the same, while checking the directories. */
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
68 size_t slen_max = HAVE_LONG_FILE_NAMES ? 255 : _POSIX_NAME_MAX;
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
69 size_t min_baselen = MIN (source_baselen, dest_baselen);
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
70 if (slen_max <= min_baselen
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
71 && memcmp (source_basename, dest_basename, slen_max) == 0)
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
72 compare_dirs = true;
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
73 #endif
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
74
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
75 if (compare_dirs)
4179
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
76 {
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
77 struct stat source_dir_stats;
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
78 struct stat dest_dir_stats;
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
79 char *source_dirname, *dest_dirname;
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
80
4181
5c87af30c731 *** empty log message ***
Jim Meyering <jim@meyering.net>
parents: 4179
diff changeset
81 /* Compare the parent directories (via the device and inode numbers). */
4179
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
82 source_dirname = dir_name (source);
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
83 dest_dirname = dir_name (dest);
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
84
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
85 if (stat (source_dirname, &source_dir_stats))
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
86 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
87 /* Shouldn't happen. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
88 error (1, errno, "%s", source_dirname);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
89 }
4179
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
90
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
91 if (stat (dest_dirname, &dest_dir_stats))
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
92 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
93 /* Shouldn't happen. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
94 error (1, errno, "%s", dest_dirname);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
95 }
4179
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
96
4910
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
97 same = SAME_INODE (source_dir_stats, dest_dir_stats);
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
98
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
99 #if ! _POSIX_NO_TRUNC && HAVE_PATHCONF && defined _PC_NAME_MAX
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
100 if (same && ! identical_basenames)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
101 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
102 long name_max = (errno = 0, pathconf (dest_dirname, _PC_NAME_MAX));
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
103 if (name_max < 0)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
104 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
105 if (errno)
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
106 {
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
107 /* Shouldn't happen. */
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
108 error (1, errno, "%s", dest_dirname);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
109 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
110 same = false;
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
111 }
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
112 else
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
113 same = (name_max <= min_baselen
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
114 && memcmp (source_basename, dest_basename, name_max) == 0);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12069
diff changeset
115 }
4910
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
116 #endif
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
117
4179
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
118 free (source_dirname);
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
119 free (dest_dirname);
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
120 }
7dd6887fa0db Optimization: Avoid unnecessary stat() calls.
Bruno Haible <bruno@clisp.org>
parents: 3966
diff changeset
121
4910
de285d9e7c4d Merge from coreutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4674
diff changeset
122 return same;
1857
f47e2d0bff02 New file (function extracted from ln.c).
Jim Meyering <jim@meyering.net>
parents:
diff changeset
123 }