ttyoutq_bytesused
*(int *)data = ttyoutq_bytesused(&ss->snp_outq);
if (ttyoutq_bytesused(&ss->snp_outq) > 0)
xt->xt_outcc = ttyoutq_bytesused(&tp->t_outq);
*(int *)data = ttyoutq_bytesused(&tp->t_outq);
bytes = ttyoutq_bytesused(&tp->t_outq);
if (ttyoutq_bytesused(&tp->t_outq) == 0 && !ttydevsw_busy(tp))
else if (leaving && ttyoutq_bytesused(&tp->t_outq) < bytes) {
bytes = ttyoutq_bytesused(&tp->t_outq);
return ttyoutq_bytesused(&tp->t_outq);