GET_TTY
if (GET_TTY(termp->Filedes, buf) != 0) {
if (GET_TTY(termp->Filedes, &termp->Nttyb) == OK) {
if (GET_TTY(_term->Filedes, buf) != 0) {
GET_TTY(fd, tty_settings);
if (fd < 0 || GET_TTY(my_fd, tty_settings) < 0) {