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[/] [or1k/] [trunk/] [uclinux/] [uC-libc/] [sysdeps/] [kernel_version.c] - Blame information for rev 1778

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/* 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 ();
}

Line No.	Rev	Author	Line
1	199	simons	`/* Copyright (C) 1996 Free Software Foundation, Inc.`
2			`This file is part of the GNU C Library.`
3
4			`The GNU C Library is free software; you can redistribute it and/or`
5			`modify it under the terms of the GNU Library General Public License as`
6			`published by the Free Software Foundation; either version 2 of the`
7			`License, or (at your option) any later version.`
8
9			`The GNU C Library is distributed in the hope that it will be useful,`
10			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
11			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU`
12			`Library General Public License for more details.`
13
14			`You should have received a copy of the GNU Library General Public`
15			`License along with the GNU C Library; see the file COPYING.LIB. If`
16			`not, write to the Free Software Foundation, Inc., 675 Mass Ave,`
17			`Cambridge, MA 02139, USA. */`
18
19			`#include <ansidecl.h>`
20			`#include <string.h>`
21			`#include <sys/utsname.h>`
22			`#include <sys/param.h>`
23
24			`static int __linux_kernel_version = -1;`
25
26			`static inline int`
27			`asc2int (const char *s)`
28			`{`
29			`int result = 0;`
30
31			`for (; s >= '0' && s <= '9'; s++)`
32			`{`
33			`result = result * 10 + (*s - '0');`
34			`}`
35
36			`return result;`
37			`}`
38
39			`static int`
40			`set_linux_kernel_version (void)`
41			`{`
42			`struct utsname uts;`
43			`char version = NULL, patchlevel = NULL, *sublevel = NULL;`
44
45			`if (uname (&uts))`
46			`{`
47			`__linux_kernel_version = 0;`
48			`return __linux_kernel_version;`
49			`}`
50
51			`version = uts.release;`
52			`if (version != NULL)`
53			`{`
54			`patchlevel = strchr (version, '.');`
55			`if (patchlevel != NULL)`
56			`{`
57			`*patchlevel = '\0';`
58			`patchlevel++;`
59			`sublevel = strchr (patchlevel, '.');`
60			`if (sublevel != NULL)`
61			`{`
62			`*sublevel = '\0';`
63			`sublevel++;`
64			`}`
65			`}`
66
67			`__linux_kernel_version =`
68			`GET_LINUX_KERNEL_VERSION (asc2int (version));`
69			`if (patchlevel != NULL)`
70			`{`
71			`__linux_kernel_version \|=`
72			`GET_LINUX_KERNEL_PATCHLEVEL (asc2int (patchlevel));`
73			`}`
74			`if (sublevel != NULL)`
75			`{`
76			`__linux_kernel_version \|=`
77			`GET_LINUX_KERNEL_SUBLEVEL (asc2int (sublevel));`
78			`}`
79			`}`
80			`else`
81			`{`
82			`__linux_kernel_version = 0;`
83			`}`
84
85			`return __linux_kernel_version;`
86			`}`
87
88			`int`
89			`__get_linux_kernel_version (void)`
90			`{`
91			`if (__linux_kernel_version != -1)`
92			`return __linux_kernel_version;`
93
94			`return set_linux_kernel_version ();`
95			`}`

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[/] [or1k/] [trunk/] [uclinux/] [uC-libc/] [sysdeps/] [kernel_version.c] - Blame information for rev 1778