+static int set_log_level(DBusConnection *bus, char **args) {
+ _cleanup_dbus_error_free_ DBusError error;
+ _cleanup_dbus_message_unref_ DBusMessage *m = NULL, *reply = NULL;
+ DBusMessageIter iter, sub;
+ const char* property = "LogLevel";
+ const char* interface = "org.freedesktop.systemd1.Manager";
+ const char* value;
+
+ assert(bus);
+ assert(args);
+
+ value = args[1];
+ dbus_error_init(&error);
+
+ m = dbus_message_new_method_call("org.freedesktop.systemd1",
+ "/org/freedesktop/systemd1",
+ "org.freedesktop.DBus.Properties",
+ "Set");
+ if (!m)
+ return log_oom();
+
+ dbus_message_iter_init_append(m, &iter);
+
+ if (!dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &interface) ||
+ !dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &property) ||
+ !dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, "s", &sub))
+ return log_oom();
+
+ if (!dbus_message_iter_append_basic(&sub, DBUS_TYPE_STRING, &value)) {
+ dbus_message_iter_abandon_container(&iter, &sub);
+ return log_oom();
+ }
+
+ if (!dbus_message_iter_close_container(&iter, &sub))
+ return log_oom();
+
+ reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
+ if (!reply) {
+ log_error("Failed to issue method call: %s", bus_error_message(&error));
+ return -EIO;
+ }
+
+ return 0;
+}
+