if (sc == NULL) { printf("sab_cngetc: invalid device\n");
if (sc == NULL)
sab_cngetc(dev)	dev_t dev;{	struct sabtty_softc *sc = sabtty_cons_input;	if (sc == NULL) {		printf("sab_cngetc: invalid device\n");		return (-1);	}	return (sabtty_cngetc(sc));}