1/* Work around an fstatat bug on Solaris 9.
2
3   Copyright (C) 2006 Free Software Foundation, Inc.
4
5   This program is free software: you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18/* Written by Paul Eggert and Jim Meyering.  */
19
20#include <config.h>
21
22#define COMPILING_FSTATAT 1
23#include "openat.h"
24
25#include <errno.h>
26#include <string.h>
27
28/* fstatat should always follow symbolic links that end in /, but on
29   Solaris 9 it doesn't if AT_SYMLINK_NOFOLLOW is specified.  This is
30   the same problem that lstat.c addresses, so solve it in a similar
31   way.  */
32
33int
34rpl_fstatat (int fd, char const *file, struct stat *st, int flag)
35{
36  int result = fstatat (fd, file, st, flag);
37
38  if (result == 0 && (flag & AT_SYMLINK_NOFOLLOW) && S_ISLNK (st->st_mode)
39      && file[strlen (file) - 1] == '/')
40    {
41      /* FILE refers to a symbolic link and the name ends with a slash.
42	 Get info about the link's referent.  */
43      result = fstatat (fd, file, st, flag & ~AT_SYMLINK_NOFOLLOW);
44      if (result == 0 && ! S_ISDIR (st->st_mode))
45	{
46	  /* fstatat succeeded and FILE references a non-directory.
47	     But it was specified via a name including a trailing
48	     slash.  Fail with errno set to ENOTDIR to indicate the
49	     contradiction.  */
50	  errno = ENOTDIR;
51	  return -1;
52	}
53    }
54
55  return result;
56}
57