allow_usage
allow_usage(un, B_FALSE,
allow_usage(un, B_FALSE,
allow_usage(un, B_TRUE, NULL);
allow_usage(un, B_FALSE,
allow_usage(un, B_FALSE,
allow_usage(un, B_FALSE,
allow_usage(un, B_FALSE,
allow_usage(un, B_TRUE, errbuf);
allow_usage(un, B_TRUE, errbuf);
allow_usage(un, B_TRUE, errbuf);