/* Stub for readlink().
- Copyright (C) 2003 Free Software Foundation, Inc.
+ Copyright (C) 2003-2007 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software Foundation,
- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
+
+/* Specification. */
+#include <unistd.h>
#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <stddef.h>
#if !HAVE_READLINK
/* readlink() substitute for systems that don't have a readlink() function,
such as DJGPP 2.03 and mingw32. */
+/* The official POSIX return type of readlink() is ssize_t, but since here
+ we have no declaration in a public header file, we use 'int' as return
+ type. */
+
int
-readlink (const char *filename, char *buffer, size_t bufsize)
+readlink (const char *path, char *buf, size_t bufsize)
{
- errno = EINVAL;
+ struct stat statbuf;
+
+ /* In general we should use lstat() here, not stat(). But on platforms
+ without symbolic links lstat() - if it exists - would be equivalent to
+ stat(), therefore we can use stat(). This saves us a configure check. */
+ if (stat (path, &statbuf) >= 0)
+ errno = EINVAL;
return -1;
}