- if ((mode = kill_mode_from_string(smode)) < 0 ||
- (who = kill_who_from_string(swho)) < 0 ||
- signo <= 0 ||
- signo >= _NSIG)
- return bus_send_error_reply(m, connection, message, &error, -EINVAL);
+ if (isempty(smode))
+ mode = KILL_CONTROL_GROUP;
+ else {
+ mode = kill_mode_from_string(smode);
+ if (mode < 0)
+ return bus_send_error_reply(connection, message, &error, -EINVAL);
+ }
+
+ if (signo <= 0 || signo >= _NSIG)
+ return bus_send_error_reply(connection, message, &error, -EINVAL);