-#serial 13
+# serial 19
# 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. */
+# been fixed between 2.4.21-pre3 and 2.4.21-pre4.
-# Copyright (C) 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+# Copyright (C) 2003-2007, 2009-2015 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_DECLS_ONCE([getcwd])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+ AC_CHECK_HEADERS_ONCE([unistd.h])
+ AC_REQUIRE([gl_PATHMAX_SNIPPET_PREREQ])
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"
+ dnl Please keep this in sync with tests/test-getcwd.c.
AC_RUN_IFELSE(
[AC_LANG_SOURCE(
- [[
+ [[
#include <errno.h>
#include <stdlib.h>
-#include <unistd.h>
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#else
+# include <direct.h>
+#endif
#include <string.h>
#include <limits.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
+]gl_PATHMAX_SNIPPET[
+
#ifndef AT_FDCWD
# define AT_FDCWD 0
#endif
# define is_ENAMETOOLONG(x) 0
#endif
+/* Use the getcwd function, not any macro. */
+#undef getcwd
+
/* Don't get link errors because mkdir is redefined to rpl_mkdir. */
#undef mkdir
exit (0);
#else
char buf[PATH_MAX * (DIR_NAME_SIZE / DOTDOTSLASH_LEN + 1)
- + DIR_NAME_SIZE + BUF_SLOP];
+ + DIR_NAME_SIZE + BUF_SLOP];
char *cwd = getcwd (buf, PATH_MAX);
size_t initial_cwd_len;
size_t cwd_len;
size_t n_chdirs = 0;
if (cwd == NULL)
- exit (1);
+ exit (10);
cwd_len = initial_cwd_len = strlen (cwd);
cwd_len += DIR_NAME_SIZE;
/* 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. */
+ 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)
- {
- if (! (errno == ERANGE || is_ENAMETOOLONG (errno)))
- fail = 2;
- break;
- }
+ {
+ if (! (errno == ERANGE || is_ENAMETOOLONG (errno)))
+ fail = 20;
+ break;
+ }
if (PATH_MAX <= cwd_len && cwd_len < PATH_MAX + DIR_NAME_SIZE)
- {
- c = getcwd (buf, PATH_MAX);
- if (!c && errno == ENOENT)
- {
- fail = 1;
- break;
- }
- if (c || ! (errno == ERANGE || is_ENAMETOOLONG (errno)))
- {
- fail = 2;
- break;
- }
- }
+ {
+ struct stat sb;
+
+ c = getcwd (buf, PATH_MAX);
+ if (!c && errno == ENOENT)
+ {
+ fail = 11;
+ break;
+ }
+ if (c)
+ {
+ fail = 31;
+ break;
+ }
+ if (! (errno == ERANGE || is_ENAMETOOLONG (errno)))
+ {
+ fail = 21;
+ break;
+ }
+
+ /* Our replacement needs to be able to stat() long ../../paths,
+ so generate a path larger than PATH_MAX to check,
+ avoiding the replacement if we can't stat(). */
+ c = getcwd (buf, cwd_len + 1);
+ if (c && !AT_FDCWD && stat (c, &sb) != 0 && is_ENAMETOOLONG (errno))
+ {
+ fail = 32;
+ 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)
- {
- if (! (errno == ERANGE || errno == ENOENT
- || is_ENAMETOOLONG (errno)))
- {
- fail = 2;
- break;
- }
- if (AT_FDCWD || errno == ERANGE || errno == ENOENT)
- {
- fail = 1;
- break;
- }
- }
- }
+ {
+ if (dotdot_max + DIR_NAME_SIZE < cwd_len - initial_cwd_len)
+ break;
+ c = getcwd (buf, cwd_len + 1);
+ if (!c)
+ {
+ if (! (errno == ERANGE || errno == ENOENT
+ || is_ENAMETOOLONG (errno)))
+ {
+ fail = 22;
+ break;
+ }
+ if (AT_FDCWD || errno == ERANGE || errno == ENOENT)
+ {
+ fail = 12;
+ break;
+ }
+ }
+ }
if (c && strlen (c) != cwd_len)
- {
- fail = 2;
- break;
- }
+ {
+ fail = 23;
+ break;
+ }
++n_chdirs;
}
rmdir (DIR_NAME);
for (i = 0; i <= n_chdirs; i++)
{
- if (chdir ("..") < 0)
- break;
- if (rmdir (DIR_NAME) != 0)
- break;
+ if (chdir ("..") < 0)
+ break;
+ if (rmdir (DIR_NAME) != 0)
+ break;
}
}
]])],
[gl_cv_func_getcwd_path_max=yes],
[case $? in
- 1) gl_cv_func_getcwd_path_max='no, but it is partly working';;
+ 10|11|12) gl_cv_func_getcwd_path_max='no, but it is partly working';;
+ 31) gl_cv_func_getcwd_path_max='no, it has the AIX bug';;
+ 32) gl_cv_func_getcwd_path_max='yes, but with shorter paths';;
*) gl_cv_func_getcwd_path_max=no;;
esac],
- [gl_cv_func_getcwd_path_max=no])
+ [case "$host_os" in
+ aix*) gl_cv_func_getcwd_path_max='no, it has the AIX bug';;
+ *) gl_cv_func_getcwd_path_max=no;;
+ esac])
])
- 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
])
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