tty_opened_ns
if (!tty_opened_ns(tp)) {
if ((cur_scp->index != next_scr) && tty_opened_ns(tp) &&
if (!tty_opened_ns(tp)) {
tty_opened_ns(tp))
if (tty_opened_ns(tp)) {
if (tty_opened_ns(tp)) {
if (!tty_opened_ns(tp))
if (!tty_opened_ns(tp))
if (tty_opened_ns(tp))
if (!tty_opened_ns(cur_tty))