| /* vi: set sw=4 ts=4: */ |
| /* |
| * Utility routines. |
| * |
| * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
| */ |
| |
| #include <sys/utsname.h> /* for uname(2) */ |
| |
| #include "libbb.h" |
| |
| /* Returns current kernel version encoded as major*65536 + minor*256 + patch, |
| * so, for example, to check if the kernel is greater than 2.2.11: |
| * |
| * if (get_linux_version_code() > KERNEL_VERSION(2,2,11)) { <stuff> } |
| */ |
| int get_linux_version_code(void) |
| { |
| struct utsname name; |
| char *s; |
| int i, r; |
| |
| if (uname(&name) == -1) { |
| bb_perror_msg("cannot get system information"); |
| return 0; |
| } |
| |
| s = name.release; |
| r = 0; |
| for (i = 0; i < 3; i++) { |
| r = r * 256 + atoi(strtok(s, ".")); |
| s = NULL; |
| } |
| return r; |
| } |