1 /* Stub for readlink().
2 Copyright (C) 2003-2004 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 #include <sys/cdefs.h>
18 __RCSID("$NetBSD: readlink.c,v 1.2 2016/05/17 14:00:09 christos Exp $");
19
20
21 #ifdef HAVE_CONFIG_H
22 # include <config.h>
23 #endif
24
25 #include <errno.h>
26 #include <sys/types.h>
27 #include <sys/stat.h>
28 #include <stddef.h>
29
30 #if !HAVE_READLINK
31
32 /* readlink() substitute for systems that don't have a readlink() function,
33 such as DJGPP 2.03 and mingw32. */
34
35 /* The official POSIX return type of readlink() is ssize_t, but since here
36 we have no declaration in a public header file, we use 'int' as return
37 type. */
38
39 int
readlink(const char * path,char * buf,size_t bufsize)40 readlink (const char *path, char *buf, size_t bufsize)
41 {
42 struct stat statbuf;
43
44 /* In general we should use lstat() here, not stat(). But on platforms
45 without symbolic links lstat() - if it exists - would be equivalent to
46 stat(), therefore we can use stat(). This saves us a configure check. */
47 if (stat (path, &statbuf) >= 0)
48 errno = EINVAL;
49 return -1;
50 }
51
52 #endif
53