r = command (NULL, &err, "/sbin/tune2fs", "-U", uuid, device, NULL);
if (r == -1) {
reply_with_error ("tune2fs -U: %s", err);
r = command (NULL, &err, "/sbin/tune2fs", "-U", uuid, device, NULL);
if (r == -1) {
reply_with_error ("tune2fs -U: %s", err);