-#serial 5
-# Check for several getcwd bugs with long paths.
+#serial 12
+# 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.
-
-# 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.
-
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# 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.
+# Copyright (C) 2003, 2004, 2005, 2006 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.
# From Jim Meyering
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 paths properly],
- gl_cv_func_getcwd_path_max,
- [
- # Arrange for deletion of the temporary directory this test creates.
- ac_clean_files="$ac_clean_files confdir3"
- AC_RUN_IFELSE([AC_LANG_SOURCE([[
+ AC_CACHE_CHECK([whether getcwd handles long file names properly],
+ gl_cv_func_getcwd_path_max,
+ [# Arrange for deletion of the temporary directory this test creates.
+ ac_clean_files="$ac_clean_files confdir3"
+ AC_RUN_IFELSE(
+ [AC_LANG_SOURCE(
+ [[
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#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 = 1;
+ if (! (errno == ERANGE || is_ENAMETOOLONG (errno)))
+ fail = 2;
break;
}
if (PATH_MAX <= cwd_len && cwd_len < PATH_MAX + DIR_NAME_SIZE)
{
c = getcwd (buf, PATH_MAX);
- if (c || errno != ERANGE)
+ if (!c && errno == ENOENT)
{
fail = 1;
break;
}
+ if (c || ! (errno == ERANGE || is_ENAMETOOLONG (errno)))
+ {
+ fail = 2;
+ break;
+ }
}
if (dotdot_max <= cwd_len - initial_cwd_len)
if (dotdot_max + DIR_NAME_SIZE < cwd_len - initial_cwd_len)
break;
c = getcwd (buf, cwd_len + 1);
- if (!c && (AT_FDCWD || !is_ENAMETOOLONG (errno)))
+ if (!c)
{
- fail = 1;
- break;
+ if (! (errno == ERANGE || errno == ENOENT
+ || is_ENAMETOOLONG (errno)))
+ {
+ fail = 2;
+ break;
+ }
+ if (AT_FDCWD || errno == ERANGE || errno == ENOENT)
+ {
+ fail = 1;
+ break;
+ }
}
}
if (c && strlen (c) != cwd_len)
{
- fail = 1;
+ fail = 2;
break;
}
++n_chdirs;
{
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)
exit (fail);
#endif
}
- ]])],
- [gl_cv_func_getcwd_path_max=yes],
- [gl_cv_func_getcwd_path_max=no],
- [gl_cv_func_getcwd_path_max=no])])
+ ]])],
+ [gl_cv_func_getcwd_path_max=yes],
+ [case $? in
+ 1) gl_cv_func_getcwd_path_max='no, but it is partly working';;
+ *) gl_cv_func_getcwd_path_max=no;;
+ esac],
+ [gl_cv_func_getcwd_path_max=no])
+ ])
+ case $gl_cv_func_getcwd_path_max in
+ no,*)
+ AC_DEFINE([HAVE_PARTLY_WORKING_GETCWD], 1,
+ [Define to 1 if getcwd works, except it sometimes fails when it shouldn't,
+ setting errno to ERANGE, ENAMETOOLONG, or ENOENT. If __GETCWD_PREFIX
+ is not defined, it doesn't matter whether HAVE_PARTLY_WORKING_GETCWD
+ is defined.]);;
+ esac
])
projects / gnulib.git / blobdiff