c/r: add support for CRIU's --action-script

src/lxc/criu.c

@@ -185,6 +185,9 @@ static void exec_criu(struct criu_opts *opts)
 	if (opts->user->verbose)
 		static_args++;
 
+	if (opts->user->action_script)
+		static_args += 2;
+
 	ret = snprintf(log, PATH_MAX, "%s/%s.log", opts->user->directory, opts->action);
 	if (ret < 0 || ret >= PATH_MAX) {
 		ERROR("logfile name too long\n");
@@ -235,6 +238,11 @@ static void exec_criu(struct criu_opts *opts)
 	if (opts->user->verbose)
 		DECLARE_ARG("-vvvvvv");
 
+	if (opts->user->action_script) {
+		DECLARE_ARG("--action-script");
+		DECLARE_ARG(opts->user->action_script);
+	}
+
 	if (strcmp(opts->action, "dump") == 0 || strcmp(opts->action, "pre-dump") == 0) {
 		char pid[32], *freezer_relative;
 

src/lxc/lxccontainer.h

@@ -891,6 +891,11 @@ struct migrate_opts {
 	 * won't if e.g. you rsync the filesystems between two machines.
 	 */
 	bool preserves_inodes;
+
+	/* Path to an executable script that will be registered as a criu
+	 * "action script"
+	 */
+	char *action_script;
 };
 
 /*!