require 'gdbm'

dbfnam = (ENV['CATDB'] || 'z.database')

GDBM.open(dbfnam, 0666) {|hdb|
  for line in ARGF
    key, val = line.chomp.split(/,/, 2)
    next if /^#/ === key
    hdb.store(key, val)
  end
}