1/* 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*/ 67