mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-21 20:40:05 +00:00
70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/* Verify that print functions return error when there is an I/O error.
|
|
|
|
Copyright (C) 2005-2024 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 <error.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
char tmpl[] = "/tmp/tst-put-error.XXXXXX";
|
|
int fd = mkstemp (tmpl);
|
|
if (fd == -1)
|
|
error (EXIT_FAILURE, errno, "cannot create temporary file");
|
|
FILE *fp = fdopen (fd, "w");
|
|
if (fp == NULL)
|
|
error (EXIT_FAILURE, errno, "fdopen");
|
|
|
|
/* All of the tests below verify that flushing buffers result in failure of
|
|
the fprintf calls. We ensure that the buffer is flushed at the end of
|
|
each fprintf call by doing two things - setting the file pointer to
|
|
line-buffered so that it is flushed whenever it encounters a newline and
|
|
then ensuring that there is a newline in each of the format strings we
|
|
pass to fprintf. */
|
|
|
|
setlinebuf (fp);
|
|
close (fd);
|
|
unlink (tmpl);
|
|
|
|
int n = fprintf (fp, "hello world\n");
|
|
printf ("fprintf = %d\n", n);
|
|
if (n >= 0)
|
|
error (EXIT_FAILURE, 0, "first fprintf succeeded");
|
|
|
|
n = fprintf (fp, "hello world\n");
|
|
printf ("fprintf = %d\n", n);
|
|
if (n >= 0)
|
|
error (EXIT_FAILURE, 0, "second fprintf succeeded");
|
|
|
|
/* Padded printing takes a different code path. */
|
|
n = fprintf (fp, "%100s\n", "foo");
|
|
printf ("fprintf = %d\n", n);
|
|
if (n >= 0)
|
|
error (EXIT_FAILURE, 0, "padded fprintf succeeded");
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define TEST_FUNCTION do_test ()
|
|
#include "../test-skeleton.c"
|