SCR_OPEN
return ((sc->sc_scr[idx]->scr_flags & SCR_OPEN) ? EBUSY : 0);
((scr->scr_flags & SCR_OPEN) && !(flags & WSDISPLAY_DELSCR_FORCE)))
scr->scr_flags |= SCR_OPEN;
scr->scr_flags &= ~SCR_OPEN;