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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 ();
- }
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