1/*
2 * Copyright (c) 2014 The FreeBSD Foundation.
3 * All rights reserved.
4 *
5 * Portions of this software were developed by Konstantin Belousov
6 * under sponsorship from the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice(s), this list of conditions and the following disclaimer as
13 *    the first lines of this file unmodified other than the possible
14 *    addition of one or more copyright notices.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice(s), this list of conditions and the following disclaimer in
17 *    the documentation and/or other materials provided with the
18 *    distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
21 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
24 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
27 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
28 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
29 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
30 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD$");
35
36#include <sys/types.h>
37#include <sys/fcntl.h>
38#include <stdarg.h>
39#include "libc_private.h"
40
41__weak_reference(__sys_openat, __openat);
42__sym_compat(openat, __impl_openat, FBSD_1.1);
43__weak_reference(openat, __impl_openat);
44__sym_default(openat, openat, FBSD_1.2);
45
46#pragma weak openat
47int
48openat(int fd, const char *path, int flags, ...)
49{
50	va_list ap;
51	int mode;
52
53	if ((flags & O_CREAT) != 0) {
54		va_start(ap, flags);
55		mode = va_arg(ap, int);
56		va_end(ap);
57	} else {
58		mode = 0;
59	}
60	return (((int (*)(int, const char *, int, ...))
61	    __libc_interposing[INTERPOS_openat])(fd, path, flags, mode));
62}
63