mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 14:00:30 +00:00
149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
/* Test freopen with mmap stdio.
|
|
Copyright (C) 2002-2024 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 <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include <support/check.h>
|
|
#include <support/temp_file.h>
|
|
|
|
static int fd;
|
|
static char *name;
|
|
|
|
static void
|
|
do_prepare (int argc, char *argv[])
|
|
{
|
|
fd = create_temp_file ("tst-freopen.", &name);
|
|
TEST_VERIFY_EXIT (fd != -1);
|
|
}
|
|
|
|
#define PREPARE do_prepare
|
|
|
|
/* Basic tests for freopen. */
|
|
static void
|
|
do_test_basic (void)
|
|
{
|
|
const char * const test = "Let's test freopen.\n";
|
|
char temp[strlen (test) + 1];
|
|
|
|
FILE *f = fdopen (fd, "w");
|
|
if (f == NULL)
|
|
FAIL_EXIT1 ("fdopen: %m");
|
|
|
|
fputs (test, f);
|
|
fclose (f);
|
|
|
|
f = fopen (name, "r");
|
|
if (f == NULL)
|
|
FAIL_EXIT1 ("fopen: %m");
|
|
|
|
if (fread (temp, 1, strlen (test), f) != strlen (test))
|
|
FAIL_EXIT1 ("fread: %m");
|
|
temp [strlen (test)] = '\0';
|
|
|
|
if (strcmp (test, temp))
|
|
FAIL_EXIT1 ("read different string than was written: (%s, %s)",
|
|
test, temp);
|
|
|
|
f = freopen (name, "r+", f);
|
|
if (f == NULL)
|
|
FAIL_EXIT1 ("freopen: %m");
|
|
|
|
if (fseek (f, 0, SEEK_SET) != 0)
|
|
FAIL_EXIT1 ("fseek: %m");
|
|
|
|
if (fread (temp, 1, strlen (test), f) != strlen (test))
|
|
FAIL_EXIT1 ("fread: %m");
|
|
temp [strlen (test)] = '\0';
|
|
|
|
if (strcmp (test, temp))
|
|
FAIL_EXIT1 ("read different string than was written: (%s, %s)",
|
|
test, temp);
|
|
|
|
fclose (f);
|
|
}
|
|
|
|
#if defined __GNUC__ && __GNUC__ >= 11
|
|
/* Force an error to detect incorrectly making freopen a deallocator
|
|
for its last argument via attribute malloc. The function closes
|
|
the stream without deallocating it so either the argument or
|
|
the pointer returned from the function (but not both) can be passed
|
|
to fclose. */
|
|
#pragma GCC diagnostic push
|
|
#pragma GCC diagnostic error "-Wmismatched-dealloc"
|
|
#endif
|
|
|
|
/* Verify that freopen returns stream. */
|
|
static void
|
|
do_test_return_stream (void)
|
|
{
|
|
FILE *f1 = fopen (name, "r");
|
|
if (f1 == NULL)
|
|
FAIL_EXIT1 ("fopen: %m");
|
|
|
|
FILE *f2 = freopen (name, "r+", f1);
|
|
if (f2 == NULL)
|
|
FAIL_EXIT1 ("freopen: %m");
|
|
|
|
/* Verify that freopen isn't declared with the no-argument attribute
|
|
malloc (which could let GCC fold the inequality to false). */
|
|
if (f1 != f2)
|
|
FAIL_EXIT1 ("freopen returned a different stream");
|
|
|
|
/* This shouldn't trigger -Wmismatched-dealloc. */
|
|
fclose (f1);
|
|
}
|
|
|
|
#if defined __GNUC__ && __GNUC__ >= 11
|
|
/* Pop -Wmismatched-dealloc set to error above. */
|
|
# pragma GCC diagnostic pop
|
|
#endif
|
|
|
|
/* Test for BZ#21398, where it tries to freopen stdio after the close
|
|
of its file descriptor. */
|
|
static void
|
|
do_test_bz21398 (void)
|
|
{
|
|
(void) close (STDIN_FILENO);
|
|
|
|
FILE *f = freopen (name, "r", stdin);
|
|
if (f == NULL)
|
|
FAIL_EXIT1 ("freopen: %m");
|
|
|
|
TEST_VERIFY_EXIT (ferror (f) == 0);
|
|
|
|
char buf[128];
|
|
char *ret = fgets (buf, sizeof (buf), stdin);
|
|
TEST_VERIFY_EXIT (ret != NULL);
|
|
TEST_VERIFY_EXIT (ferror (f) == 0);
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
do_test_basic ();
|
|
do_test_bz21398 ();
|
|
do_test_return_stream ();
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|