getkernel.c (1424B)
1 // $Id$ --*- c++ -*-- 2 3 // Copyright (C) 2011 Daniel Hokka Zakrisson <daniel@hozac.com> 4 // 5 // This program is free software; you can redistribute it and/or modify 6 // it under the terms of the GNU General Public License as published by 7 // the Free Software Foundation; version 2 of the License. 8 // 9 // This program is distributed in the hope that it will be useful, 10 // but WITHOUT ANY WARRANTY; without even the implied warranty of 11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 // GNU General Public License for more details. 13 // 14 // You should have received a copy of the GNU General Public License 15 // along with this program; if not, write to the Free Software 16 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17 18 19 #ifdef HAVE_CONFIG_H 20 # include <config.h> 21 #endif 22 23 #include <sys/utsname.h> 24 #include <ctype.h> 25 26 int 27 vc_get_kernel() 28 { 29 static int linux_ver = -1; 30 if (linux_ver == -1) { 31 struct utsname uts; 32 char *p; 33 int part, n; 34 if (uname(&uts) == -1) 35 return -1; 36 part = 0; 37 n = 0; 38 linux_ver = 0; 39 for (p = uts.release; *p && part < 3; p++) { 40 if (*p == '.') { 41 if (part < 3) { 42 linux_ver |= n << (8 * (2 - part)); 43 n = 0; 44 part++; 45 } 46 } 47 else if (isdigit(*p)) { 48 n *= 10; 49 n += *p - '0'; 50 } 51 else 52 break; 53 } 54 if (n > 0 && part < 3) 55 linux_ver |= n << (8 * (2 - part)); 56 } 57 return linux_ver; 58 }