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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2013 Todd C. Miller <Todd.Miller@sudo.ws>
*
* 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.
*/
/*
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
*/
#include <config.h>
#ifndef HAVE_DUP3
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include "sudo_compat.h"
int
sudo_dup3(int oldd, int newd, int flags)
{
int oflags;
if (oldd == newd) {
errno = EINVAL;
return -1;
}
if (dup2(oldd, newd) == -1)
return -1;
oflags = fcntl(newd, F_GETFL, 0);
if (oflags == -1)
goto bad;
if (ISSET(flags, O_NONBLOCK)) {
if (!ISSET(oflags, O_NONBLOCK)) {
SET(oflags, O_NONBLOCK);
if (fcntl(newd, F_SETFL, oflags) == -1)
goto bad;
}
} else {
if (ISSET(oflags, O_NONBLOCK)) {
CLR(oflags, O_NONBLOCK);
if (fcntl(newd, F_SETFL, oflags) == -1)
goto bad;
}
}
if (ISSET(flags, O_CLOEXEC)) {
if (fcntl(newd, F_SETFD, FD_CLOEXEC) == -1)
goto bad;
}
return 0;
bad:
close(newd);
return -1;
}
#endif /* HAVE_DUP3 */
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