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[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Utility routines.
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| 4 | *
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| 5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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| 6 | *
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| 7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 8 | */
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| 9 |
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| 10 | #include <sys/utsname.h> /* for uname(2) */
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| 11 |
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| 12 | #include "libbb.h"
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| 13 |
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| 14 | /* Returns current kernel version encoded as major*65536 + minor*256 + patch,
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| 15 | * so, for example, to check if the kernel is greater than 2.2.11:
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| 16 | *
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| 17 | * if (get_linux_version_code() > KERNEL_VERSION(2,2,11)) { <stuff> }
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| 18 | */
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| 19 | int get_linux_version_code(void)
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| 20 | {
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| 21 | struct utsname name;
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| 22 | char *s;
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| 23 | int i, r;
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| 24 |
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| 25 | if (uname(&name) == -1) {
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| 26 | bb_perror_msg("cannot get system information");
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[1765] | 27 | return 0;
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[821] | 28 | }
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| 29 |
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| 30 | s = name.release;
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| 31 | r = 0;
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[1765] | 32 | for (i = 0; i < 3; i++) {
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[821] | 33 | r = r * 256 + atoi(strtok(s, "."));
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| 34 | s = NULL;
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| 35 | }
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| 36 | return r;
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| 37 | }
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