+ if (expose) {
+ int b;
+
+ if ((b = parse_boolean(expose)) < 0) {
+ log_error("Failed to parse SYSTEMD_EXPOSE udev property for device %s: %s", sysfs, expose);
+ return 0;
+ }
+
+ if (!b)
+ return 0;
+ } else
+ if (!dn && !names && !wants)
+ return 0;