ldns-gen-zone -version (return code: 0)
ldns-gen-zone version 1.6.17 (ldns version 1.6.17)
ldns-gen-zone -h (return code: 0)
Usage: ldns-gen-zone [-hsv] [-ap NUM] [-o ORIGIN] [<zonefile>] Reads a zonefile and add some artificial NS RRsets and DS records. If no zonefile is given, the zone is read from stdin. -a <NUM> add NUM artifical delegations (NS RRSets) to output. -p <NUM> add NUM percent of DS RRset's to the NS RRsets (1-4 RR's per DS RRset). -o ORIGIN sets an $ORIGIN, which can be handy if the one in the zonefile is set to @. -s if input zone file is already sorted and canonicalized (ie all lowercase), use this option to speed things up while inserting DS records. -h show this text. -v shows the version and exits. if no file is given standard input is read.