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authorEric Andersen <andersen@codepoet.org>2000-07-05 19:23:36 +0000
committerEric Andersen <andersen@codepoet.org>2000-07-05 19:23:36 +0000
commit9281d180d13057917f618c35ef7433d2e4d4dd86 (patch)
treeb497158acdc1a81b93b938a2f76376c88bc7799b /libc/sysdeps/linux/common/kernel_version.c
parent775622914fa0a2814c705d25b1a3929002c5c785 (diff)
Completely rearchitected the sysdeps directory.
-Erik
Diffstat (limited to 'libc/sysdeps/linux/common/kernel_version.c')
-rw-r--r--libc/sysdeps/linux/common/kernel_version.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/common/kernel_version.c b/libc/sysdeps/linux/common/kernel_version.c
new file mode 100644
index 000000000..dacc4f0f7
--- /dev/null
+++ b/libc/sysdeps/linux/common/kernel_version.c
@@ -0,0 +1,95 @@
+/* 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 ();
+}