xref: /freebsd/contrib/openbsm/bin/auditdistd/faccessat.h (revision d2ce15bd43b3a1dcce08eecbff8d5d359946d972)
1 /*-
2  * Copyright (c) 2012 The FreeBSD Foundation
3  * All rights reserved.
4  *
5  * This software was developed by Pawel Jakub Dawidek under sponsorship from
6  * 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, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * $P4: //depot/projects/trustedbsd/openbsm/bin/auditdistd/faccessat.h#1 $
30  */
31 
32 #ifndef	_FACCESSAT_H_
33 #define	_FACCESSAT_H_
34 
35 #include <unistd.h>
36 
37 #define	AT_EACCESS	0x01
38 
39 static int
40 faccessat(int fd, const char *path, int mode, int flag)
41 {
42 	int cfd, error, ret;
43 
44 	if (flag == AT_EACCESS) {
45 		errno = EINVAL;
46 		return (-1);
47 	}
48 
49 	cfd = open(".", O_RDONLY | O_DIRECTORY);
50 	if (cfd == -1)
51 		return (-1);
52 
53 	if (fchdir(fd) == -1) {
54 		error = errno;
55 		(void)close(cfd);
56 		errno = error;
57 		return (-1);
58 	}
59 
60 	ret = access(path, mode);
61 
62 	error = errno;
63 	(void)fchdir(cfd);
64 	(void)close(cfd);
65 	errno = error;
66 	return (ret);
67 }
68 
69 #endif	/* !_FACCESSAT_H_ */
70