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