hush/libbb/kernel_version.c
Denys Vlasenko 0ef64bdb40 *: make GNU licensing statement forms more regular
This change retains "or later" state! No licensing _changes_ here,
only form is adjusted (article, space between "GPL" and "v2" and so on).

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2010-08-16 20:14:46 +02:00

39 lines
858 B
C

/* 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 source tree.
*/
#include "libbb.h"
/* After libbb.h, since it needs sys/types.h on some systems */
#include <sys/utsname.h> /* for uname(2) */
/* 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 FAST_FUNC get_linux_version_code(void)
{
struct utsname name;
char *s;
int i, r;
if (uname(&name) == -1) {
bb_perror_msg("can't 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;
}