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/* Test freopen failure.
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 <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <support/check.h>
#include <support/descriptors.h>
#include <support/file_contents.h>
#include <support/support.h>
#include <support/temp_file.h>
#include <support/test-driver.h>
#include <support/xstdio.h>
#define START_TEST(DESC) \
do \
{ \
fds = support_descriptors_list (); \
verbose_printf (DESC); \
} \
while (0)
#define END_TEST \
do \
{ \
support_descriptors_check (fds); \
support_descriptors_free (fds); \
} \
while (0)
int
do_test (void)
{
struct support_descriptors *fds;
char *temp_dir = support_create_temp_directory ("tst-freopen3");
char *file1 = xasprintf ("%s/file1", temp_dir);
support_write_file_string (file1, "file1");
add_temp_file (file1);
char *file2 = xasprintf ("%s/file2", temp_dir);
support_write_file_string (file2, "file2");
add_temp_file (file2);
char *file_nodir = xasprintf ("%s/nodir/file", temp_dir);
FILE *fp;
int ret;
int fd;
START_TEST ("Testing w -> wx (file exists)\n");
fp = xfopen (file1, "w");
fp = FREOPEN (file2, "wx", fp);
TEST_VERIFY (fp == NULL);
END_TEST;
/* Test old file is closed even when opening the new file fails. */
START_TEST ("testing r -> r (opening new file fails)\n");
fp = xfopen (file1, "r");
fd = fileno (fp);
fp = FREOPEN (file_nodir, "r", fp);
TEST_VERIFY (fp == NULL);
errno = 0;
ret = fcntl (fd, F_GETFL);
TEST_COMPARE (ret, -1);
TEST_COMPARE (errno, EBADF);
END_TEST;
free (temp_dir);
free (file1);
free (file2);
free (file_nodir);
return 0;
}
#include <support/test-driver.c>
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