#tie %lhash, 'GDBM_File', $lookup_file, &GDBM_NEWDB, 0644;
tie %lhash, 'TDB_File', $lookup_file, TDB_CLEAR_IF_FIRST, O_RDWR, 0644;
print STDERR "creating lookup file '$lookup_file'\n";
#tie %lhash, 'GDBM_File', $lookup_file, &GDBM_NEWDB, 0644;
tie %lhash, 'TDB_File', $lookup_file, TDB_CLEAR_IF_FIRST, O_RDWR, 0644;
print STDERR "creating lookup file '$lookup_file'\n";