1/*-
2 * Copyright (c) 2012 Jukka A. Ukkonen
3 * All rights reserved.
4 *
5 * This software was developed by Jukka Ukkonen for FreeBSD.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: releng/10.2/lib/libc/gen/dup3.c 254409 2013-08-16 13:10:30Z jilles $");
31
32#include "namespace.h"
33#include <unistd.h>
34#include <fcntl.h>
35#include <errno.h>
36#include "un-namespace.h"
37
38int
39__dup3(int oldfd, int newfd, int flags)
40{
41	int how;
42
43	if (oldfd == newfd) {
44		errno = EINVAL;
45		return (-1);
46	}
47
48	if (flags & ~O_CLOEXEC) {
49		errno = EINVAL;
50		return (-1);
51	}
52
53	how = (flags & O_CLOEXEC) ? F_DUP2FD_CLOEXEC : F_DUP2FD;
54
55	return (_fcntl(oldfd, how, newfd));
56}
57
58__weak_reference(__dup3, dup3);
59__weak_reference(__dup3, _dup3);
60