c_rdev
arcn->sb.st_rdev = (dev_t)asc_ul(hd->c_rdev, sizeof(hd->c_rdev), OCT);
ul_asc(arcn->sb.st_rdev, hd->c_rdev, sizeof(hd->c_rdev), OCT) ||
char c_rdev[6]; /* block/char major/minor # */
spcl.c_rdev = dp->dp1.di_rdev;
spcl.c_rdev = dp->dp2.di_rdev;
buf->c_rdev = u_ospcl.s_ospcl.c_odinode.odi_rdev;
curfile.rdev = header->c_rdev;
s->c_rdev = swap32(s->c_rdev);