X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Freadlink.c;h=5cccdc962af223fac5178c675a3ad2dc17877c8a;hb=671c9011cb6944a63f0d15f60252c31bf0ee8e9b;hp=72d0e04475de401cc67f5d2f0e3a410511c5fcca;hpb=84645eae86ddff86ca4760ca71b4852673dedd03;p=gnulib.git

diff --git a/lib/readlink.c b/lib/readlink.c
index 72d0e0447..5cccdc962 100644
--- a/lib/readlink.c
+++ b/lib/readlink.c
@@ -1,10 +1,10 @@
 /* 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
@@ -12,24 +12,37 @@
    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;
 }