unlinkat.h revision 243730 
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/unlinkat.h#1 $
30 */
31
32#ifndef	_UNLINKAT_H_
33#define	_UNLINKAT_H_
34
35#include <fcntl.h>
36#include <unistd.h>
37
38#define	AT_REMOVEDIR	0x01
39
40static int
41unlinkat(int fd, const char *path, int flag)
42{
43	int cfd, error, ret;
44
45	cfd = open(".", O_RDONLY | O_DIRECTORY);
46	if (cfd == -1)
47		return (-1);
48
49	if (fchdir(fd) == -1) {
50		error = errno;
51		(void)close(cfd);
52		errno = error;
53		return (-1);
54	}
55
56	if (flag == AT_REMOVEDIR)
57		ret = rmdir(path);
58	else
59		ret = unlink(path);
60
61	error = errno;
62	(void)fchdir(cfd);
63	(void)close(cfd);
64	errno = error;
65	return (ret);
66}
67
68#endif	/* !_UNLINKAT_H_ */
69