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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 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 *t;
int r;
uname(&name); /* never fails */
t = name.release - 1;
r = 1;
do {
r <<= 8;
if (t) {
r += atoi(++t);
t = strchr(t, '.');
}
} while (r < 0x1000000);
return r - 0x1000000;
}
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