error = acd_setchan(cdp, CHANNEL_1, CHANNEL_1, 0, 0);
break;
case CDIOCGETMEDIUM:
{
struct ioc_medium *m = (struct ioc_medium *)addr;
m->data_length = cdp->cap.data_length;
m->medium_type = cdp->cap.medium_type;
}
case CDRIOCBLANK:
error = acd_blank(cdp);