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 2, or (at your option)
8   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, write to the Free Software Foundation,
17   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
18
19/* Written by Paul Eggert and Jim Meyering.  */
20
21#include <config.h>
22
23#define COMPILING_FSTATAT 1
24#include "openat.h"
25
26#include <errno.h>
27#include <string.h>
28
29/* fstatat should always follow symbolic links that end in /, but on
30   Solaris 9 it doesn't if AT_SYMLINK_NOFOLLOW is specified.  This is
31   the same problem that lstat.c addresses, so solve it in a similar
32   way.  */
33
34int
35rpl_fstatat (int fd, char const *file, struct stat *st, int flag)
36{
37  int result = fstatat (fd, file, st, flag);
38
39  if (result == 0 && (flag & AT_SYMLINK_NOFOLLOW) && S_ISLNK (st->st_mode)
40      && file[strlen (file) - 1] == '/')
41    {
42      /* FILE refers to a symbolic link and the name ends with a slash.
43	 Get info about the link's referent.  */
44      result = fstatat (fd, file, st, flag & ~AT_SYMLINK_NOFOLLOW);
45      if (result == 0 && ! S_ISDIR (st->st_mode))
46	{
47	  /* fstatat succeeded and FILE references a non-directory.
48	     But it was specified via a name including a trailing
49	     slash.  Fail with errno set to ENOTDIR to indicate the
50	     contradiction.  */
51	  errno = ENOTDIR;
52	  return -1;
53	}
54    }
55
56  return result;
57}
58