-#serial 1
+# serial 4
# Determine whether getcwd aborts when the length of the working directory
# name is unusually large. Any length between 4k and 16k trigger the bug
# when using glibc-2.4.90-9 or older.
-# Copyright (C) 2006 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009-2011 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.
# gl_FUNC_GETCWD_ABORT_BUG([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
AC_DEFUN([gl_FUNC_GETCWD_ABORT_BUG],
[
- AC_CHECK_DECLS_ONCE(getcwd)
- AC_CHECK_FUNCS(getpagesize)
+ AC_CHECK_DECLS_ONCE([getcwd])
+ AC_CHECK_FUNCS([getpagesize])
AC_CACHE_CHECK([whether getcwd aborts when 4k < cwd_length < 16k],
gl_cv_func_getcwd_abort_bug,
[# Remove any remnants of a previous test.
rm -rf confdir-14B---
# Arrange for deletion of the temporary directory this test creates.
ac_clean_files="$ac_clean_files confdir-14B---"
+ dnl Please keep this in sync with tests/test-getcwd.c.
AC_RUN_IFELSE(
[AC_LANG_SOURCE(
- [[
+ [[
#include <stdlib.h>
#include <unistd.h>
#include <limits.h>
size_t d;
/* The bug is triggered when PATH_MAX < getpagesize (), so skip
- this relative expensive and invasive test if that's not true. */
+ this relatively expensive and invasive test if that's not true. */
if (getpagesize () <= PATH_MAX)
return 0;
cwd = getcwd (NULL, 0);
if (cwd == NULL)
- return 0;
+ return 2;
initial_cwd_len = strlen (cwd);
free (cwd);
desired_depth = ((TARGET_LEN - 1 - initial_cwd_len)
- / (1 + strlen (dir_name)));
+ / (1 + strlen (dir_name)));
for (d = 0; d < desired_depth; d++)
{
if (mkdir (dir_name, S_IRWXU) < 0 || chdir (dir_name) < 0)
- {
- fail = 3; /* Unable to construct deep hierarchy. */
- break;
- }
+ {
+ fail = 3; /* Unable to construct deep hierarchy. */
+ break;
+ }
}
/* If libc has the bug in question, this invocation of getcwd
while (0 < d--)
{
if (chdir ("..") < 0)
- break;
+ {
+ fail = 5;
+ break;
+ }
rmdir (dir_name);
}
- return 0;
+ return fail;
}
]])],
[gl_cv_func_getcwd_abort_bug=no],
- [gl_cv_func_getcwd_abort_bug=yes],
+ dnl A "regular" nonzero return does not indicate this bug.
+ dnl An abort will provoke an exit code of something like 134 (128 + 6).
+ [test $? -gt 128 \
+ && gl_cv_func_getcwd_abort_bug=yes \
+ || gl_cv_func_getcwd_abort_bug=no],
[gl_cv_func_getcwd_abort_bug=yes])
])
AS_IF([test $gl_cv_func_getcwd_abort_bug = yes], [$1], [$2])