diff options
Diffstat (limited to 'libc/sysdeps/linux/common/kernel_version.c')
| -rw-r--r-- | libc/sysdeps/linux/common/kernel_version.c | 115 |
1 files changed, 36 insertions, 79 deletions
diff --git a/libc/sysdeps/linux/common/kernel_version.c b/libc/sysdeps/linux/common/kernel_version.c index dacc4f0f7..c6b7eabea 100644 --- a/libc/sysdeps/linux/common/kernel_version.c +++ b/libc/sysdeps/linux/common/kernel_version.c @@ -1,89 +1,46 @@ -/* Copyright (C) 1996 Free Software Foundation, Inc. -This file is part of the GNU C Library. - -The GNU C Library is free software; you can redistribute it and/or -modify it under the terms of the GNU Library General Public License as -published by the Free Software Foundation; either version 2 of the -License, or (at your option) any later version. - -The GNU C Library is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -Library General Public License for more details. - -You should have received a copy of the GNU Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the Free Software Foundation, Inc., 675 Mass Ave, -Cambridge, MA 02139, USA. */ - -#include <ansidecl.h> +/* vi: set sw=4 ts=4: */ +/* + * Copyright (C) 1999,2000 by Lineo, inc. + * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Library General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +#include <stdio.h> #include <string.h> #include <sys/utsname.h> -#include <sys/param.h> static int __linux_kernel_version = -1; -static inline int -asc2int (const char *s) +/* Returns 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_kernel_revision() <= 2*65536+2*256+11) { <stuff> } + */ +static int find_kernel_revision(void) { - int result = 0; - - for (; *s >= '0' && *s <= '9'; s++) - { - result = result * 10 + (*s - '0'); - } - - return result; + struct utsname name; + int major = 0, minor = 0, patch = 0; + + if (uname(&name) == -1) { + return (0); + } + sscanf(name.version, "%d.%d.%d", &major, &minor, &patch); + return major * 65536 + minor * 256 + patch; } -static int -set_linux_kernel_version (void) -{ - struct utsname uts; - char *version = NULL, *patchlevel = NULL, *sublevel = NULL; - - if (uname (&uts)) - { - __linux_kernel_version = 0; - return __linux_kernel_version; - } - - version = uts.release; - if (version != NULL) - { - patchlevel = strchr (version, '.'); - if (patchlevel != NULL) - { - *patchlevel = '\0'; - patchlevel++; - sublevel = strchr (patchlevel, '.'); - if (sublevel != NULL) - { - *sublevel = '\0'; - sublevel++; - } - } - - __linux_kernel_version = - GET_LINUX_KERNEL_VERSION (asc2int (version)); - if (patchlevel != NULL) - { - __linux_kernel_version |= - GET_LINUX_KERNEL_PATCHLEVEL (asc2int (patchlevel)); - } - if (sublevel != NULL) - { - __linux_kernel_version |= - GET_LINUX_KERNEL_SUBLEVEL (asc2int (sublevel)); - } - } - else - { - __linux_kernel_version = 0; - } - - return __linux_kernel_version; -} int __get_linux_kernel_version (void) @@ -91,5 +48,5 @@ __get_linux_kernel_version (void) if (__linux_kernel_version != -1) return __linux_kernel_version; - return set_linux_kernel_version (); + return find_kernel_revision (); } |