1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2009 Konstantin Belousov
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34
35 #include <sys/param.h>
36 #include <sys/proc.h>
37 #include <sys/sbuf.h>
38 #include <sys/uio.h>
39
40 #include <fs/pseudofs/pseudofs.h>
41 #include <fs/procfs/procfs.h>
42
43 int
44 procfs_doosrel(PFS_FILL_ARGS)
45 {
46 const char *pp;
47 int ov, osrel, i;
48
49 if (uio == NULL)
50 return (EOPNOTSUPP);
51 if (uio->uio_rw == UIO_READ) {
52 sbuf_printf(sb, "%d\n", p->p_osrel);
53 } else {
54 sbuf_trim(sb);
55 sbuf_finish(sb);
56 pp = sbuf_data(sb);
57 osrel = 0;
58 i = sbuf_len(sb);
59 while (i--) {
60 if (*pp < '' || *pp > '9')
61 return (EINVAL);
62 ov = osrel * 10 + *pp++ - '';
63 if (ov < osrel)
64 return (EINVAL);
65 osrel = ov;
66 }
67 p->p_osrel = osrel;
68 }
69 return (0);
70 }
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