I_IXANY
if (tty->flow.stopped && !tty->flow.tco_stopped && I_IXON(tty) && I_IXANY(tty)) {
if (tty->flow.stopped && !tty->flow.tco_stopped && I_IXON(tty) && I_IXANY(tty)) {
tty->flow.stopped && !tty->flow.tco_stopped && I_IXANY(tty) &&
if (!I_IXON(tty) || I_IXANY(tty))