1 /* $OpenBSD: fchmod.c,v 1.3 2023/04/08 18:12:08 kn Exp $ */
2 /* $NetBSD: stat.c,v 1.3 1994/10/26 05:45:07 cgd Exp $ */
3
4 /*-
5 * Copyright (c) 1993
6 * The Regents of the University of California. All rights reserved.
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 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)stat.c 8.1 (Berkeley) 6/11/93
33 */
34
35 #include "stand.h"
36
37 int
fchmod(int fd,mode_t m)38 fchmod(int fd, mode_t m)
39 {
40 struct open_file *f = &files[fd];
41
42 if (f->f_ops->fchmod == NULL) {
43 errno = EOPNOTSUPP;
44 return (-1);
45 }
46 if ((unsigned)fd >= SOPEN_MAX || f->f_flags == 0) {
47 errno = EBADF;
48 return (-1);
49 }
50
51 /* operation not defined on raw devices */
52 if (f->f_flags & F_RAW) {
53 errno = EOPNOTSUPP;
54 return (-1);
55 }
56 /* writing is broken or unsupported */
57 if (f->f_flags & F_NOWRITE) {
58 errno = EOPNOTSUPP;
59 return (-1);
60 }
61
62 if ((errno = (f->f_ops->fchmod)(f, m)))
63 return (-1);
64 return (0);
65 }
66