From 5d2c98e1df151739342f1d59a45ca316c2f85068 Mon Sep 17 00:00:00 2001
From: Stefan Krah <stefan@bytereef.org>
Date: Tue, 6 Nov 2007 02:40:13 +0100
Subject: [PATCH] lib: add linux_version.{c,h}

Signed-off-by: Stefan Krah <stefan@bytereef.org>
Signed-off-by: Karel Zak <kzak@redhat.com>
---
 configure.ac            |  3 ++-
 include/Makefile.am     |  3 ++-
 include/linux_version.h | 14 ++++++++++++++
 lib/linux_version.c     | 25 +++++++++++++++++++++++++
 4 files changed, 43 insertions(+), 2 deletions(-)
 create mode 100644 include/linux_version.h
 create mode 100644 lib/linux_version.c

diff --git a/configure.ac b/configure.ac
index 7005b5ce..1ea72c6b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -46,7 +46,8 @@ AC_CHECK_HEADERS(
 	rpcsvc/nfs_prot.h \
 	sys/io.h \
 	pty.h \
-	err.h])
+	err.h \
+	linux/version.h])
 AC_CHECK_HEADERS([linux/raw.h],
 		 [AM_CONDITIONAL([HAVE_RAW], [true])],
 		 [AM_CONDITIONAL([HAVE_RAW], [false])])
diff --git a/include/Makefile.am b/include/Makefile.am
index e45ce398..275661de 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -1,4 +1,5 @@
 include $(top_srcdir)/config/include-Makefile.am
 
 dist_noinst_HEADERS = carefulputc.h env.h linux_reboot.h md5.h \
-	nls.h pathnames.h setproctitle.h widechar.h xstrncpy.h
+	nls.h pathnames.h setproctitle.h widechar.h xstrncpy.h \
+	linux_version.h
diff --git a/include/linux_version.h b/include/linux_version.h
new file mode 100644
index 00000000..a6a1e99c
--- /dev/null
+++ b/include/linux_version.h
@@ -0,0 +1,14 @@
+#ifndef LINUX_VERSION_H
+#define LINUX_VERSION_H
+
+#ifdef HAVE_LINUX_VERSION_H
+# include <linux/version.h>
+#endif
+
+#ifndef KERNEL_VERSION
+# define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
+#endif
+
+int get_linux_version(void);
+
+#endif /* LINUX_VERSION_H */
diff --git a/lib/linux_version.c b/lib/linux_version.c
new file mode 100644
index 00000000..f9fbd8df
--- /dev/null
+++ b/lib/linux_version.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <sys/utsname.h>
+
+#include "linux_version.h"
+
+int
+get_linux_version (void)
+{
+	static int kver = -1;
+	struct utsname uts;
+	int major;
+	int minor;
+	int teeny;
+
+	if (kver != -1)
+		return kver;
+	if (uname (&uts))
+		kver = 0;
+	else if (sscanf (uts.release, "%d.%d.%d", &major, &minor, &teeny) != 3)
+		kver = 0;
+	else
+		kver = KERNEL_VERSION (major, minor, teeny);
+
+	return kver;
+}
-- 
2.39.5