-#serial 7
-# Check for several getcwd bugs with long paths.
+#serial 13
+# Check for several getcwd bugs with long file names.
# If so, arrange to compile the wrapper function.
# This is necessary for at least GNU libc on linux-2.4.19 and 2.4.20.
# I've heard that this is due to a Linux kernel bug, and that it has
# been fixed between 2.4.21-pre3 and 2.4.21-pre4. */
-# Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+# Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_GETCWD_PATH_MAX],
[
AC_CHECK_DECLS_ONCE(getcwd)
- AC_CHECK_HEADERS_ONCE(fcntl.h)
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
AC_CACHE_CHECK([whether getcwd handles long file names properly],
gl_cv_func_getcwd_path_max,
#include <limits.h>
#include <sys/stat.h>
#include <sys/types.h>
-#if HAVE_FCNTL_H
-# include <fcntl.h>
-#endif
+#include <fcntl.h>
#ifndef AT_FDCWD
# define AT_FDCWD 0
#define BUF_SLOP 20
int
-main (void)
+main ()
{
#ifndef PATH_MAX
/* The Hurd doesn't define this, so getcwd can't exhibit the bug --
char *c = NULL;
cwd_len += DIR_NAME_SIZE;
- /* If mkdir or chdir fails, be pessimistic and consider that
- as a failure, too. */
+ /* If mkdir or chdir fails, it could be that this system cannot create
+ any file with an absolute name longer than PATH_MAX, such as cygwin.
+ If so, leave fail as 0, because the current working directory can't
+ be too long for getcwd if it can't even be created. For other
+ errors, be pessimistic and consider that as a failure, too. */
if (mkdir (DIR_NAME, S_IRWXU) < 0 || chdir (DIR_NAME) < 0)
{
- fail = 2;
+ if (! (errno == ERANGE || is_ENAMETOOLONG (errno)))
+ fail = 2;
break;
}
{
size_t i;
- /* Unlink first, in case the chdir failed. */
- unlink (DIR_NAME);
+ /* Try rmdir first, in case the chdir failed. */
+ rmdir (DIR_NAME);
for (i = 0; i <= n_chdirs; i++)
{
if (chdir ("..") < 0)
break;
- rmdir (DIR_NAME);
+ if (rmdir (DIR_NAME) != 0)
+ break;
}
}