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