Modifying the close(D2oddi) routine

Only minor changes are necessary in the close(D2oddi) routine. You need to change the line discipline call and reset the tp->t_state flag:

   /* replacing: (*linesw[tp->t_line].l_close) (tp);  */
   run_ld(tp, DIST_LINESW_CLOSE);
   ...
   s = tc_tlock(tp);
   tp->t_state &=~ (CARR_ON | WOPEN);
   tc_tunlock(tp,s);