check_match
check_match(princ1, unique1_name);
check_match(princ1, unique1_name);
check_match(princ2, unique2_name);
check_match(princ3, initial_primary_name);
check_match(princ1, unique1_name);
check_match(princ2, unique2_name);
check_match(princ3, NULL);
check_match(princ2, NULL);
check_match(princ1, unique1_name);
check_match(princ1, NULL);
if (matchline && !check_match(ifp->if_mib.ifmd_name))