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/* $OpenBSD: dup3.c,v 1.1.1.1 2018/04/10 23:00:53 bluhm Exp $ */
/*
* Copyright (c) 2018 Alexander Bluhm <bluhm@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <err.h>
#include <fcntl.h>
#include <unistd.h>
#include "header.h"
void
fdops(int fdpre, int fdpost)
{
if (dup3(fdpre, 5, O_CLOEXEC) == -1)
err(1, "dup3 pre");
if (dup3(fdpost, 6, O_CLOEXEC) == -1)
err(1, "dup3 post");
if (dup3(fdpre, 7, O_CLOEXEC) == -1)
err(1, "dup3 pepare post overwite");
if (dup3(fdpost, 7, O_CLOEXEC) == -1)
err(1, "dup3 post overwrite");
if (dup3(fdpost, 8, O_CLOEXEC) == -1)
err(1, "dup3 pepare pre overwrite");
if (dup3(fdpre, 8, O_CLOEXEC) == -1)
err(1, "dup3 pre overwite");
if (dup3(fdpre, 9, 0) == -1)
err(1, "dup3 pepare pre equal");
if (dup3(9, 9, O_CLOEXEC) != -1)
errx(1, "dup3 pre equal succeeded");
if (dup3(fdpost, 10, 0) == -1)
err(1, "dup3 pepare post equal");
if (dup3(10, 10, O_CLOEXEC) != -1)
errx(1, "dup3 post equal succeeded");
}
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