glibc/io/tst-getcwd-abspath.c

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/* BZ #22679 getcwd(3) should not succeed without returning an absolute path.
Copyright (C) 2018-2020 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 <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <support/check.h>
#include <support/namespace.h>
#include <support/support.h>
#include <support/temp_file.h>
#include <support/test-driver.h>
#include <support/xunistd.h>
#include <unistd.h>
static char *chroot_dir;
/* The actual test. Run it in a subprocess, so that the test harness
can remove the temporary directory in --direct mode. */
static void
getcwd_callback (void *closure)
{
xchroot (chroot_dir);
errno = 0;
char *cwd = getcwd (NULL, 0);
TEST_COMPARE (errno, ENOENT);
TEST_VERIFY (cwd == NULL);
errno = 0;
cwd = realpath (".", NULL);
TEST_COMPARE (errno, ENOENT);
TEST_VERIFY (cwd == NULL);
_exit (0);
}
static int
do_test (void)
{
support_become_root ();
if (!support_can_chroot ())
return EXIT_UNSUPPORTED;
chroot_dir = support_create_temp_directory ("tst-getcwd-abspath-");
support_isolate_in_subprocess (getcwd_callback, NULL);
return 0;
}
#include <support/test-driver.c>