1271 int	ttysave[2] = {-1, -1};  variable
1279 		ttysave[0] = ttys.c_lflag;  in save_tty()
1282 		ttysave[0] = ttys[0].sg_flags;  in save_tty()
1284 		ttysave[1] = ttys[1].sg_flags;  in save_tty()
1295 	if (ttysave[0] != -1) {  in restore_tty()
1297 		ttys.c_lflag = ttysave[0];  in restore_tty()
1300 		ttys[0].sg_flags = ttysave[0];  in restore_tty()
1303 	if (ttysave[1] != -1) {  in restore_tty()
1304 		ttys[1].sg_flags = ttysave[1];  in restore_tty()
1318 	if (ttysave[1] == -1)  in set_tty()
1320 	if (ttysave[1] != -1) {  in set_tty()
1333 	if (ttysave[0] == -1)  in echo_off()
1352 	if (ttysave[0] == -1)  in echo_on()