/* Provide a stub lchown function for systems that lack it.
- Copyright (C) 1998, 1999 Free Software Foundation, Inc.
+ Copyright (C) 1998, 1999, 2002, 2004 Free Software Foundation, Inc.
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
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
-#ifndef errno
-extern int errno;
-#endif
-#include "lchown.h"
-#ifdef STAT_MACROS_BROKEN
-# undef S_ISLNK
-#endif
-#if !defined(S_ISLNK) && defined(S_IFLNK)
-# define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
-#endif
+#include "lchown.h"
+#include "stat-macros.h"
/* Declare chown to avoid a warning. Don't include unistd.h,
because it may have a conflicting prototype for lchown. */
int chown ();
/* Work just like chown, except when FILE is a symbolic link.
- In that case, set errno to ENOSYS and return -1. */
+ In that case, set errno to EOPNOTSUPP and return -1.
+ But if autoconf tests determined that chown modifies
+ symlinks, then just call chown. */
int
lchown (const char *file, uid_t uid, gid_t gid)
{
+#if ! CHOWN_MODIFIES_SYMLINK
struct stat stats;
if (lstat (file, &stats) == 0 && S_ISLNK (stats.st_mode))
{
- errno = ENOSYS;
+ errno = EOPNOTSUPP;
return -1;
}
+#endif
return chown (file, uid, gid);
}