1/*-
2 * Copyright (c) 2009 Konstantin Belousov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: releng/10.3/sys/fs/procfs/procfs_osrel.c 197428 2009-09-23 12:08:08Z kib $");
32
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
41int
42procfs_doosrel(PFS_FILL_ARGS)
43{
44	const char *pp;
45	int ov, osrel, i;
46
47	if (uio == NULL)
48		return (EOPNOTSUPP);
49	if (uio->uio_rw == UIO_READ) {
50		sbuf_printf(sb, "%d\n", p->p_osrel);
51	} else {
52		sbuf_trim(sb);
53		sbuf_finish(sb);
54		pp = sbuf_data(sb);
55		osrel = 0;
56		i = sbuf_len(sb);
57		while (i--) {
58			if (*pp < '0' || *pp > '9')
59				return (EINVAL);
60			ov = osrel * 10 + *pp++ - '0';
61			if (ov < osrel)
62				return (EINVAL);
63			osrel = ov;
64		}
65		p->p_osrel = osrel;
66	}
67	return (0);
68}
69