1 /* -*- buffer-read-only: t -*- vi: set ro: */
2 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
3 /* Work around an fstatat bug on Solaris 9.
5 Copyright (C) 2006, 2009-2013 Free Software Foundation, Inc.
7 This program is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* Written by Paul Eggert and Jim Meyering. */
22 /* If the user's config.h happens to include <sys/stat.h>, let it include only
23 the system's <sys/stat.h> here, so that orig_fstatat doesn't recurse to
25 #define __need_system_sys_stat_h
28 /* Get the original definition of fstatat. It might be defined as a macro. */
29 #include <sys/types.h>
31 #undef __need_system_sys_stat_h
35 orig_fstatat (int fd, char const *filename, struct stat *buf, int flags)
37 return fstatat (fd, filename, buf, flags);
41 /* Write "sys/stat.h" here, not <sys/stat.h>, otherwise OSF/1 5.1 DTK cc
42 eliminates this include because of the preliminary #include <sys/stat.h>
50 #if HAVE_FSTATAT && HAVE_WORKING_FSTATAT_ZERO_FLAG
52 # ifndef LSTAT_FOLLOWS_SLASHED_SYMLINK
53 # define LSTAT_FOLLOWS_SLASHED_SYMLINK 0
56 /* fstatat should always follow symbolic links that end in /, but on
57 Solaris 9 it doesn't if AT_SYMLINK_NOFOLLOW is specified.
58 Likewise, trailing slash on a non-directory should be an error.
59 These are the same problems that lstat.c and stat.c address, so
60 solve it in a similar way.
62 AIX 7.1 fstatat (AT_FDCWD, ..., 0) always fails, which is a bug.
63 Work around this bug if FSTATAT_AT_FDCWD_0_BROKEN is nonzero. */
66 rpl_fstatat (int fd, char const *file, struct stat *st, int flag)
68 int result = orig_fstatat (fd, file, st, flag);
71 if (LSTAT_FOLLOWS_SLASHED_SYMLINK || result != 0)
74 if (flag & AT_SYMLINK_NOFOLLOW)
76 /* Fix lstat behavior. */
77 if (file[len - 1] != '/' || S_ISDIR (st->st_mode))
79 if (!S_ISLNK (st->st_mode))
84 result = orig_fstatat (fd, file, st, flag & ~AT_SYMLINK_NOFOLLOW);
86 /* Fix stat behavior. */
87 if (result == 0 && !S_ISDIR (st->st_mode) && file[len - 1] == '/')
95 #else /* ! (HAVE_FSTATAT && HAVE_WORKING_FSTATAT_ZERO_FLAG) */
97 /* On mingw, the gnulib <sys/stat.h> defines 'stat' as a function-like
98 macro; but using it in AT_FUNC_F2 causes compilation failure
99 because the preprocessor sees a use of a macro that requires two
100 arguments but is only given one. Hence, we need an inline
101 forwarder to get past the preprocessor. */
103 stat_func (char const *name, struct stat *st)
105 return stat (name, st);
108 /* Likewise, if there is no native 'lstat', then the gnulib
109 <sys/stat.h> defined it as stat, which also needs adjustment. */
112 # define lstat stat_func
115 /* Replacement for Solaris' function by the same name.
116 <http://www.google.com/search?q=fstatat+site:docs.sun.com>
117 First, try to simulate it via l?stat ("/proc/self/fd/FD/FILE").
118 Failing that, simulate it via save_cwd/fchdir/(stat|lstat)/restore_cwd.
119 If either the save_cwd or the restore_cwd fails (relatively unlikely),
120 then give a diagnostic and exit nonzero.
121 Otherwise, this function works just like Solaris' fstatat. */
123 # define AT_FUNC_NAME fstatat
124 # define AT_FUNC_F1 lstat
125 # define AT_FUNC_F2 stat_func
126 # define AT_FUNC_USE_F1_COND AT_SYMLINK_NOFOLLOW
127 # define AT_FUNC_POST_FILE_PARAM_DECLS , struct stat *st, int flag
128 # define AT_FUNC_POST_FILE_ARGS , st
129 # include "at-func.c"
133 # undef AT_FUNC_USE_F1_COND
134 # undef AT_FUNC_POST_FILE_PARAM_DECLS
135 # undef AT_FUNC_POST_FILE_ARGS
137 #endif /* !HAVE_FSTATAT */