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/* test ftw bz26353: Check whether stack overflow occurs when the value
of the nopenfd parameter is too large.
Copyright (C) 2020 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include <stdio.h>
#include <ftw.h>
#include <errno.h>
#include <sys/resource.h>
#include <support/temp_file.h>
#include <support/capture_subprocess.h>
#include <support/check.h>
static int
my_func (const char *file, const struct stat *sb, int flag)
{
return 0;
}
static int
get_large_nopenfd (void)
{
struct rlimit r;
TEST_COMPARE (getrlimit (RLIMIT_STACK, &r), 0);
if (r.rlim_cur == RLIM_INFINITY)
{
r.rlim_cur = 8 * 1024 * 1024;
TEST_COMPARE (setrlimit (RLIMIT_STACK, &r), 0);
}
return (int) r.rlim_cur;
}
static void
do_ftw (void *unused)
{
char *tempdir = support_create_temp_directory ("tst-bz26353");
int large_nopenfd = get_large_nopenfd ();
TEST_COMPARE (ftw (tempdir, my_func, large_nopenfd), 0);
free (tempdir);
}
/* Check whether stack overflow occurs. */
static int
do_test (void)
{
struct support_capture_subprocess result;
result = support_capture_subprocess (do_ftw, NULL);
support_capture_subprocess_check (&result, "bz26353", 0, sc_allow_none);
support_capture_subprocess_free (&result);
return 0;
}
#include <support/test-driver.c>
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