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/* 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 FAST_FUNC 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;
}
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