1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/* Copyright (C) 1996 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <string.h>
#include <sys/utsname.h>
#include <sys/param.h>
static int __linux_kernel_version = -1;
static inline int
asc2int (const char *s)
{
int result = 0;
for (; *s >= '0' && *s <= '9'; s++)
{
result = result * 10 + (*s - '0');
}
return result;
}
static int
set_linux_kernel_version (void)
{
struct utsname uts;
char *version = NULL, *patchlevel = NULL, *sublevel = NULL;
if (uname (&uts))
{
__linux_kernel_version = 0;
return __linux_kernel_version;
}
version = uts.release;
if (version != NULL)
{
patchlevel = strchr (version, '.');
if (patchlevel != NULL)
{
*patchlevel = '\0';
patchlevel++;
sublevel = strchr (patchlevel, '.');
if (sublevel != NULL)
{
*sublevel = '\0';
sublevel++;
}
}
__linux_kernel_version =
GET_LINUX_KERNEL_VERSION (asc2int (version));
if (patchlevel != NULL)
{
__linux_kernel_version |=
GET_LINUX_KERNEL_PATCHLEVEL (asc2int (patchlevel));
}
if (sublevel != NULL)
{
__linux_kernel_version |=
GET_LINUX_KERNEL_SUBLEVEL (asc2int (sublevel));
}
}
else
{
__linux_kernel_version = 0;
}
return __linux_kernel_version;
}
int
__get_linux_kernel_version (void)
{
if (__linux_kernel_version != -1)
return __linux_kernel_version;
return set_linux_kernel_version ();
}
|
