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 #include <sys/param.h>
34 #include <sys/proc.h>
35 #include <sys/sbuf.h>
36 #include <sys/uio.h>
37
38 #include <fs/pseudofs/pseudofs.h>
39 #include <fs/procfs/procfs.h>
40
41 int
procfs_doosrel(PFS_FILL_ARGS)42 procfs_doosrel(PFS_FILL_ARGS)
43 {
44 const char *pp;
45 int ov, osrel, i;
46
47 if (uio == NULL)
48 return (EOPNOTSUPP);
49 switch (uio->uio_rw) {
50 case UIO_READ:
51 sbuf_printf(sb, "%d\n", p->p_osrel);
52 break;
53 case UIO_WRITE:
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 < '0' || *pp > '9')
61 return (EINVAL);
62 ov = osrel * 10 + *pp++ - '0';
63 if (ov < osrel)
64 return (EINVAL);
65 osrel = ov;
66 }
67 p->p_osrel = osrel;
68 break;
69 }
70 return (0);
71 }
72