arcv - convert archives to new format
arcv file ...
Arcv converts archive files (see ar(1), ar(5)) from 6th edition to 7th
edition format. The conversion is done in place, and the command
refuses to alter a file not in old archive format.
Old archives are marked with a magic number of 0177555 at the start;
new archives have 0177545.
/tmp/v*, temporary copy