blob: 09cd582c4e750bfcde3ac837311cf46591cdba1c [file] [log] [blame]
Eric Andersenaad1a882001-03-16 22:47:14 +00001/* vi: set sw=4 ts=4: */
2/*
3 * Utility routines.
4 *
5 * Copyright (C) tons of folks. Tracking down who wrote what
6 * isn't something I'm going to worry about... If you wrote something
7 * here, please feel free to acknowledge your work.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
24 * Permission has been granted to redistribute this code under the GPL.
25 *
26 */
27
28#include <stdio.h>
29#include <string.h>
30#include <stdlib.h>
31#include <sys/utsname.h> /* for uname(2) */
32
33#include "libbb.h"
34
35/* Returns kernel version encoded as major*65536 + minor*256 + patch,
36 * so, for example, to check if the kernel is greater than 2.2.11:
37 * if (get_kernel_revision() <= 2*65536+2*256+11) { <stuff> }
38 */
39extern int get_kernel_revision(void)
40{
41 struct utsname name;
42 char *s;
43 int i, r;
44
45 if (uname(&name) == -1) {
46 perror_msg("cannot get system information");
47 return (0);
48 }
49
50 s = name.release;
51 r = 0;
52 for (i=0 ; i<3 ; i++) {
53 r = r * 256 + atoi(strtok(s, "."));
54 s = NULL;
55 }
56 return r;
57}
58
59/* END CODE */
60/*
61Local Variables:
62c-file-style: "linux"
63c-basic-offset: 4
64tab-width: 4
65End:
66*/