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/*-
* Copyright (c) 2010 Jilles Tjoelker
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/select.h>
#include <err.h>
#include <stdio.h>
#include <unistd.h>
/*
* Check that pipes can be selected for writing in the reverse direction.
*/
int
main(void)
{
int pip[2];
fd_set set;
int n;
if (pipe(pip) == -1)
err(1, "FAIL: pipe");
FD_ZERO(&set);
FD_SET(pip[0], &set);
n = select(pip[1] + 1, NULL, &set, NULL, &(struct timeval){ 0, 0 });
if (n != 1)
errx(1, "FAIL: select initial reverse direction");
n = write(pip[0], "x", 1);
if (n != 1)
err(1, "FAIL: write reverse direction");
FD_ZERO(&set);
FD_SET(pip[0], &set);
n = select(pip[1] + 1, NULL, &set, NULL, &(struct timeval){ 0, 0 });
if (n != 1)
errx(1, "FAIL: select reverse direction after write");
printf("PASS\n");
return (0);
}
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