1/* vi: set sw=4 ts=4: */ 2/* 3 * Utility routines. 4 * 5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> 6 * 7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. 8 */ 9 10#include "libbb.h" 11/* After libbb.h, since it needs sys/types.h on some systems */ 12#include <sys/utsname.h> /* for uname(2) */ 13 14 15/* Returns current kernel version encoded as major*65536 + minor*256 + patch, 16 * so, for example, to check if the kernel is greater than 2.2.11: 17 * 18 * if (get_linux_version_code() > KERNEL_VERSION(2,2,11)) { <stuff> } 19 */ 20int FAST_FUNC get_linux_version_code(void) 21{ 22 struct utsname name; 23 char *s; 24 int i, r; 25 26 if (uname(&name) == -1) { 27 bb_perror_msg("can't get system information"); 28 return 0; 29 } 30 31 s = name.release; 32 r = 0; 33 for (i = 0; i < 3; i++) { 34 r = r * 256 + atoi(strtok(s, ".")); 35 s = NULL; 36 } 37 return r; 38} 39