Eric Andersen | aad1a88 | 2001-03-16 22:47:14 +0000 | [diff] [blame^] | 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 | */ |
| 39 | extern 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 | /* |
| 61 | Local Variables: |
| 62 | c-file-style: "linux" |
| 63 | c-basic-offset: 4 |
| 64 | tab-width: 4 |
| 65 | End: |
| 66 | */ |