add restart framework

src/lxc/restart.c

@@ -20,13 +20,58 @@
  * 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 <lxc/lxc.h>
+
+#include "../config.h"
+#include <stdio.h>
+#undef _GNU_SOURCE
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+
 #include <lxc/log.h>
+#include <lxc/start.h>	/* for struct lxc_handler */
+#include <lxc/utils.h>
+#include <lxc/error.h>
 
 lxc_log_define(lxc_restart, lxc);
 
-int lxc_restart(const char *name, int sfd, struct lxc_conf *conf, int flags)
+struct restart_args {
+	int sfd;
+	int flags;
+};
+
+static int restart(struct lxc_handler *handler, void* data)
 {
+	struct restart_args *arg __attribute__ ((unused)) = data;
+
 	ERROR("'restart' function not implemented");
 	return -1;
 }
+
+static int post_restart(struct lxc_handler *handler, void* data)
+{
+	struct restart_args *arg __attribute__ ((unused)) = data;
+
+	NOTICE("'%s' container restarting with pid '%d'", handler->name,
+	       handler->pid);
+	return 0;
+}
+
+static struct lxc_operations restart_ops = {
+	.start = restart,
+	.post_start = post_restart
+};
+
+int lxc_restart(const char *name, int sfd, struct lxc_conf *conf, int flags)
+{
+	struct restart_args restart_arg = {
+		.sfd = sfd,
+		.flags = flags
+	};
+
+	if (lxc_check_inherited(sfd))
+		return -1;
+
+	return __lxc_start(name, conf, &restart_ops, &restart_arg);
+}