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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) Linux Test Project, 2002-2022
* Copyright (c) International Business Machines Corp., 2001
*/
/*\
* [Description]
*
* Verify that write(2) fails with errno EAGAIN when attempt to write to fifo
* opened in O_NONBLOCK mode.
*/
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
#include <setjmp.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include "tst_test.h"
static char fifo[100];
static int rfd, wfd;
static long page_size;
static void verify_write(void)
{
char wbuf[8 * page_size];
TST_EXP_FAIL2(write(wfd, wbuf, sizeof(wbuf)), EAGAIN);
}
static void setup(void)
{
page_size = getpagesize();
char wbuf[17 * page_size];
sprintf(fifo, "%s.%d", fifo, getpid());
SAFE_MKNOD(fifo, S_IFIFO | 0777, 0);
rfd = SAFE_OPEN(fifo, O_RDONLY | O_NONBLOCK);
wfd = SAFE_OPEN(fifo, O_WRONLY | O_NONBLOCK);
SAFE_WRITE(SAFE_WRITE_ANY, wfd, wbuf, sizeof(wbuf));
}
static void cleanup(void)
{
if (rfd > 0)
SAFE_CLOSE(rfd);
if (wfd > 0)
SAFE_CLOSE(wfd);
}
static struct tst_test test = {
.needs_tmpdir = 1,
.setup = setup,
.cleanup = cleanup,
.test_all = verify_write,
};
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