getnumdflt
getnumdflt(fsize, pfsize, 0);
getnumdflt(pp->p_fstype, ptype, 0);
getnumdflt(dp->d_secsize, "se", DEV_BSIZE);
getnumdflt(dp->d_type, "dt", 0);
getnumdflt(dp->d_secpercyl, "sc", dp->d_nsectors * dp->d_ntracks);
getnumdflt(dp->d_secperunit, "su", dp->d_secpercyl * dp->d_ncylinders);