1229533Sray/*-
2229533Sray * Copyright (c) 2012 The FreeBSD Foundation
3229533Sray * All rights reserved.
4229533Sray *
5229533Sray * This software was developed by Pawel Jakub Dawidek under sponsorship from
6229533Sray * the FreeBSD Foundation.
7229533Sray *
8229533Sray * Redistribution and use in source and binary forms, with or without
9229533Sray * modification, are permitted provided that the following conditions
10229533Sray * are met:
11229533Sray * 1. Redistributions of source code must retain the above copyright
12229533Sray *    notice, this list of conditions and the following disclaimer.
13229533Sray * 2. Redistributions in binary form must reproduce the above copyright
14229533Sray *    notice, this list of conditions and the following disclaimer in the
15229533Sray *    documentation and/or other materials provided with the distribution.
16229533Sray *
17229533Sray * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
18229533Sray * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19229533Sray * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20229533Sray * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
21229533Sray * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22229533Sray * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23229533Sray * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24229533Sray * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25229533Sray * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26229533Sray * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27229533Sray * SUCH DAMAGE.
28229533Sray *
29229533Sray * $P4: //depot/projects/trustedbsd/openbsm/bin/auditdistd/openat.h#1 $
30229533Sray */
31229533Sray
32229533Sray#ifndef	_OPENAT_H_
33229533Sray#define	_OPENAT_H_
34229533Sray
35229533Sray#include <fcntl.h>
36229533Sray#include <stdarg.h>
37229533Sray#include <unistd.h>
38229533Sray
39229533Sraystatic int
40229533Srayopenat(int fd, const char *path, int flags, ...)
41229533Sray{
42229533Sray	int cfd, ffd, error;
43229533Sray
44229533Sray	cfd = open(".", O_RDONLY | O_DIRECTORY);
45229533Sray	if (cfd == -1)
46229533Sray		return (-1);
47229533Sray
48229533Sray	if (fchdir(fd) == -1) {
49229533Sray		error = errno;
50229533Sray		(void)close(cfd);
51229533Sray		errno = error;
52229533Sray		return (-1);
53229533Sray	}
54229533Sray
55229533Sray	if ((flags & O_CREAT) != 0) {
56229533Sray		va_list ap;
57229533Sray		int mode;
58229533Sray
59229533Sray		va_start(ap, flags);
60229533Sray		mode = va_arg(ap, int);
61229533Sray		va_end(ap);
62229533Sray
63229533Sray		ffd = open(path, flags, mode);
64229533Sray	} else {
65229533Sray		ffd = open(path, flags);
66229533Sray	}
67229533Sray
68229533Sray	error = errno;
69229533Sray	(void)fchdir(cfd);
70229533Sray	(void)close(cfd);
71229533Sray	errno = error;
72229533Sray	return (ffd);
73229533Sray}
74
75#endif	/* !_OPENAT_H_ */
76