extern int ser_base_send_break (struct serial *scb);
extern void ser_base_raw (struct serial *scb);
extern serial_ttystate ser_base_get_tty_state (struct serial *scb);
+extern serial_ttystate ser_base_copy_tty_state (struct serial *scb,
+ serial_ttystate ttystate);
extern int ser_base_set_tty_state (struct serial *scb,
serial_ttystate ttystate);
extern void ser_base_print_tty_state (struct serial *scb,