getnumdflt
getnumdflt(dp->d_ncylinders, "nc", 0);
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);
getnumdflt(dp->d_rpm, "rm", 3600);
getnumdflt(dp->d_interleave, "il", 1);
getnumdflt(dp->d_trackskew, "sk", 0);
getnumdflt(dp->d_cylskew, "cs", 0);
getnumdflt(dp->d_headswitch, "hs", 0);
getnumdflt(dp->d_trkseek, "ts", 0);
getnumdflt(dp->d_bbsize, "bs", BBSIZE);
getnumdflt(dp->d_sbsize, "sb", 0);
getnumdflt(pp->p_fsize, pfsize, 0);
getnumdflt(pp->p_fstype, ptype, 0);
getnumdflt(*dx, psize, 0);
getnumdflt(dp->d_secsize, "se", DEV_BSIZE);
getnumdflt(dp->d_ntracks, "nt", 0);
getnumdflt(dp->d_nsectors, "ns", 0);