[tz] rearguard

This would be so much easier (for me;) ) if all data forms were published by IANA. $ awk -v DATAFORM=vanguard -f ziguard.awk africa antarctica asia australasia europe northamerica southamerica etcetera systemv factory backward *malloc(): memory corruptionAborted (core dumped)* On Ubuntu 18.04 trying to get files in rearguard format so I can patch Java & JodaTime.... Need to patch as we need the Fiji change now.