1 /* Work around a bug of lstat on some systems
3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free
4 Software Foundation, Inc.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software Foundation,
18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
20 /* written by Jim Meyering */
26 /* The specification of these functions is in sys_stat.h. But we cannot
27 include this include file here, because on some systems, a
28 "#define lstat lstat64" is being used, and sys_stat.h deletes this
31 #include <sys/types.h>
36 #include "stat-macros.h"
38 /* lstat works differently on Linux and Solaris systems. POSIX (see
39 `pathname resolution' in the glossary) requires that programs like
40 `ls' take into consideration the fact that FILE has a trailing slash
41 when FILE is a symbolic link. On Linux and Solaris 10 systems, the
42 lstat function already has the desired semantics (in treating
43 `lstat ("symlink/", sbuf)' just like `lstat ("symlink/.", sbuf)',
44 but on Solaris 9 and earlier it does not.
46 If FILE has a trailing slash and specifies a symbolic link,
47 then use stat() to get more info on the referent of FILE.
48 If the referent is a non-directory, then set errno to ENOTDIR
49 and return -1. Otherwise, return stat's result. */
52 rpl_lstat (const char *file, struct stat *sbuf)
55 int lstat_result = lstat (file, sbuf);
57 if (lstat_result != 0 || !S_ISLNK (sbuf->st_mode))
61 if (len == 0 || file[len - 1] != '/')
64 /* FILE refers to a symbolic link and the name ends with a slash.
65 Call stat() to get info about the link's referent. */
67 /* If stat fails, then we do the same. */
68 if (stat (file, sbuf) != 0)
71 /* If FILE references a directory, return 0. */
72 if (S_ISDIR (sbuf->st_mode))
75 /* Here, we know stat succeeded and FILE references a non-directory.
76 But it was specified via a name including a trailing slash.
77 Fail with errno set to ENOTDIR to indicate the contradiction. */