Added the function returning the version and the corresponding cli

configure.in

 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.
 
-AC_INIT([lxc], [0.2.1])
+AC_INIT([lxc], [0.2.2])
 
 AC_CONFIG_SRCDIR([configure.in])
 AC_CONFIG_AUX_DIR([config])

src/lxc/Makefile.am

@@ -22,6 +22,7 @@ liblxc_la_SOURCES = \
 	monitor.c monitor.h \
 	kill.c \
 	freezer.c \
+	version.c \
 	lxc_cgroup.c lxc_cgroup.h \
 	lxc.h \
 	lxc_utils.h \
@@ -55,7 +56,8 @@ bin_PROGRAMS = \
 	lxc-freeze \
 	lxc-info \
 	lxc-unfreeze \
-	lxc-priority
+	lxc-priority \
+	lxc-version
 
 lxc_create_SOURCES = lxc_create.c lxc_config.c lxc_config.h
 lxc_create_LDADD = liblxc.la
@@ -95,3 +97,6 @@ lxc_unfreeze_LDADD = liblxc.la
 
 lxc_priority_SOURCES = lxc_priority.c
 lxc_priority_LDADD = liblxc.la
+
+lxc_version_SOURCES = lxc_version.c
+lxc_version_LDADD = liblxc.la

src/lxc/lxc.h

@@ -250,6 +250,11 @@ extern int lxc_cgroup_get_cpuset(const char *name, long *cpumask,
  */
 extern int lxc_cgroup_get_cpu_usage(const char *name, long long *usage);
 
+/*
+ * Returns a the version number of the library
+ */
+extern const char const *lxc_version(void);
+
 #ifdef __cplusplus
 }
 #endif

src/lxc/lxc_version.c

+/*
+ * lxc: linux Container library
+ *
+ * (C) Copyright IBM Corp. 2007, 2008
+ *
+ * Authors:
+ * Daniel Lezcano <dlezcano at fr.ibm.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <stdio.h>
+#include <lxc/lxc.h>
+
+int main(int argc, char *argv[])
+{
+	printf("Version: %s\n", lxc_version());
+	return 0;
+}

src/lxc/version.c

+/*
+ * lxc: linux Container library
+ *
+ * (C) Copyright IBM Corp. 2007, 2008
+ *
+ * Authors:
+ * Daniel Lezcano <dlezcano at fr.ibm.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "../config.h"
+
+const char const* lxc_version(void)
+{
+	return PACKAGE_VERSION;
+}