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/param.h>
33 #include <sys/proc.h>
34 #include <sys/sbuf.h>
35 #include <sys/uio.h>
36
37 #include <fs/pseudofs/pseudofs.h>
38 #include <fs/procfs/procfs.h>
39
40 int
procfs_doosrel(PFS_FILL_ARGS)41 procfs_doosrel(PFS_FILL_ARGS)
42 {
43 const char *pp;
44 int ov, osrel, i;
45
46 if (uio == NULL)
47 return (EOPNOTSUPP);
48 switch (uio->uio_rw) {
49 case UIO_READ:
50 sbuf_printf(sb, "%d\n", p->p_osrel);
51 break;
52 case UIO_WRITE:
53 sbuf_trim(sb);
54 sbuf_finish(sb);
55 pp = sbuf_data(sb);
56 osrel = 0;
57 i = sbuf_len(sb);
58 while (i--) {
59 if (*pp < '0' || *pp > '9')
60 return (EINVAL);
61 ov = osrel * 10 + *pp++ - '0';
62 if (ov < osrel)
63 return (EINVAL);
64 osrel = ov;
65 }
66 p->p_osrel = osrel;
67 break;
68 }
69 return (0);
70 }
71