mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 01:33:36 +08:00
103 lines
3.3 KiB
C
103 lines
3.3 KiB
C
/* Test freopen in chroot.
|
|
Copyright (C) 2024 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 <mcheck.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#include <support/check.h>
|
|
#include <support/file_contents.h>
|
|
#include <support/namespace.h>
|
|
#include <support/support.h>
|
|
#include <support/temp_file.h>
|
|
#include <support/test-driver.h>
|
|
#include <support/xstdio.h>
|
|
#include <support/xunistd.h>
|
|
|
|
int
|
|
do_test (void)
|
|
{
|
|
mtrace ();
|
|
char *temp_dir;
|
|
FILE *fp;
|
|
int ret;
|
|
|
|
/* These chroot tests verify that either reopening a renamed or
|
|
deleted file works even in the absence of /proc, or that it fails
|
|
(without memory leaks); thus, for example, such reopening does
|
|
not crash in the absence of /proc. */
|
|
|
|
support_become_root ();
|
|
if (!support_can_chroot ())
|
|
return EXIT_UNSUPPORTED;
|
|
|
|
temp_dir = support_create_temp_directory ("tst-freopen4");
|
|
xchroot (temp_dir);
|
|
|
|
/* Test freopen with NULL, renamed file. This verifies that
|
|
reopening succeeds (and resets the file position indicator to
|
|
start of file) even when the original path could no longer be
|
|
opened, or fails without a memory leak. (It is not possible to
|
|
use <support/descriptors.h> to test for file descriptor leaks
|
|
here, because that also depends on /proc.) */
|
|
|
|
verbose_printf ("testing freopen with NULL, renamed file\n");
|
|
fp = xfopen ("/file1", "w+");
|
|
ret = fputs ("file has been renamed", fp);
|
|
TEST_VERIFY (ret >= 0);
|
|
ret = rename ("/file1", "/file1a");
|
|
TEST_COMPARE (ret, 0);
|
|
fp = FREOPEN (NULL, "r+", fp);
|
|
if (fp != NULL)
|
|
{
|
|
puts ("freopen of renamed file succeeded");
|
|
TEST_COMPARE_FILE_STRING (fp, "file has been renamed");
|
|
xfclose (fp);
|
|
}
|
|
else
|
|
puts ("freopen of renamed file failed (OK)");
|
|
ret = rename ("/file1a", "/file1");
|
|
TEST_COMPARE (ret, 0);
|
|
|
|
/* Test freopen with NULL, deleted file. This verifies that
|
|
reopening succeeds (and resets the file position indicator to
|
|
start of file) even when the original path could no longer be
|
|
opened, or fails without a memory leak. */
|
|
|
|
verbose_printf ("testing freopen with NULL, deleted file\n");
|
|
fp = xfopen ("/file1", "r+");
|
|
ret = fputs ("file has now been deleted", fp);
|
|
TEST_VERIFY (ret >= 0);
|
|
ret = remove ("/file1");
|
|
TEST_COMPARE (ret, 0);
|
|
fp = FREOPEN (NULL, "r+", fp);
|
|
if (fp != NULL)
|
|
{
|
|
puts ("freopen of deleted file succeeded");
|
|
TEST_COMPARE_FILE_STRING (fp, "file has now been deleted");
|
|
xfclose (fp);
|
|
}
|
|
else
|
|
puts ("freopen of deleted file failed (OK)");
|
|
|
|
free (temp_dir);
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|