Contents of /tags/mkinitrd-6_2_1/busybox/libbb/kernel_version.c
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Sun May 30 12:16:23 2010 UTC (14 years, 4 months ago) by niro
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Sun May 30 12:16:23 2010 UTC (14 years, 4 months ago) by niro
File MIME type: text/plain
File size: 866 byte(s)
tagged 'mkinitrd-6_2_1'
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Utility routines. |
4 | * |
5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
8 | */ |
9 | |
10 | #include "libbb.h" |
11 | /* After libbb.h, since it needs sys/types.h on some systems */ |
12 | #include <sys/utsname.h> /* for uname(2) */ |
13 | |
14 | |
15 | /* Returns current kernel version encoded as major*65536 + minor*256 + patch, |
16 | * so, for example, to check if the kernel is greater than 2.2.11: |
17 | * |
18 | * if (get_linux_version_code() > KERNEL_VERSION(2,2,11)) { <stuff> } |
19 | */ |
20 | int FAST_FUNC get_linux_version_code(void) |
21 | { |
22 | struct utsname name; |
23 | char *s; |
24 | int i, r; |
25 | |
26 | if (uname(&name) == -1) { |
27 | bb_perror_msg("can't get system information"); |
28 | return 0; |
29 | } |
30 | |
31 | s = name.release; |
32 | r = 0; |
33 | for (i = 0; i < 3; i++) { |
34 | r = r * 256 + atoi(strtok(s, ".")); |
35 | s = NULL; |
36 | } |
37 | return r; |
38 | } |