1/* Stub for readlink().
2   Copyright (C) 2003-2007 Free Software Foundation, Inc.
3
4   This program is free software; you can redistribute it and/or modify
5   it under the terms of the GNU General Public License as published by
6   the Free Software Foundation; either version 2, or (at your option)
7   any later version.
8
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12   GNU General Public License for more details.
13
14   You should have received a copy of the GNU General Public License
15   along with this program; if not, write to the Free Software Foundation,
16   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
17
18#include <config.h>
19
20/* Specification.  */
21#include <unistd.h>
22
23#include <errno.h>
24#include <sys/types.h>
25#include <sys/stat.h>
26#include <stddef.h>
27
28#if !HAVE_READLINK
29
30/* readlink() substitute for systems that don't have a readlink() function,
31   such as DJGPP 2.03 and mingw32.  */
32
33/* The official POSIX return type of readlink() is ssize_t, but since here
34   we have no declaration in a public header file, we use 'int' as return
35   type.  */
36
37int
38readlink (const char *path, char *buf, size_t bufsize)
39{
40  struct stat statbuf;
41
42  /* In general we should use lstat() here, not stat().  But on platforms
43     without symbolic links lstat() - if it exists - would be equivalent to
44     stat(), therefore we can use stat().  This saves us a configure check.  */
45  if (stat (path, &statbuf) >= 0)
46    errno = EINVAL;
47  return -1;
48}
49
50#endif
51