add --define to restart

src/lxc/lxc_restart.c

 /*
  * lxc: linux Container library
  *
- * (C) Copyright IBM Corp. 2007, 2008
+ * (C) Copyright IBM Corp. 2007, 2010
  *
  * Authors:
  * Daniel Lezcano <dlezcano at fr.ibm.com>
@@ -25,11 +25,14 @@
 #undef _GNU_SOURCE
 #include <stdlib.h>
 #include <unistd.h>
+#include <errno.h>
 #include <sys/types.h>
 
-#include <lxc/lxc.h>
-#include <lxc/log.h>
-
+#include "log.h"
+#include "lxc.h"
+#include "conf.h"
+#include "config.h"
+#include "confile.h"
 #include "arguments.h"
 
 lxc_log_define(lxc_restart_ui, lxc_restart);
@@ -81,6 +84,9 @@ Options :\n\
 
 int main(int argc, char *argv[])
 {
+	char *rcfile = NULL;
+	struct lxc_conf *conf;
+
 	if (lxc_arguments_parse(&my_args, argc, argv))
 		return -1;
 
@@ -88,6 +94,33 @@ int main(int argc, char *argv[])
 			 my_args.progname, my_args.quiet))
 		return -1;
 
-	return lxc_restart(my_args.name, my_args.statefile, my_args.rcfile,
+	/* rcfile is specified in the cli option */
+	if (my_args.rcfile)
+		rcfile = (char *)my_args.rcfile;
+	else {
+		if (!asprintf(&rcfile, LXCPATH "/%s/config", my_args.name)) {
+			SYSERROR("failed to allocate memory");
+			return -1;
+		}
+
+		/* container configuration does not exist */
+		if (access(rcfile, F_OK)) {
+			free(rcfile);
+			rcfile = NULL;
+		}
+	}
+
+	conf = lxc_conf_init();
+	if (!conf) {
+		ERROR("failed to initialize configuration");
+		return -1;
+	}
+
+	if (rcfile && lxc_config_read(rcfile, conf)) {
+		ERROR("failed to read configuration file");
+		return -1;
+	}
+
+	return lxc_restart(my_args.name, my_args.statefile, conf,
 			   my_args.flags);
 }