181     pub fn tty_line_name(&self, index: usize) -> String {  in tty_line_name()
188             return format!("{}{}", self.name, index + self.name_base);  in tty_line_name()
193         self.ttys.lock().insert(tty_core.core().index(), tty_core);  in add_tty()
203     pub fn device_number(&self, index: usize) -> Option<DeviceNumber> {  in device_number()
204         if index >= self.device_count as usize {  in device_number()
209             self.minor_start + index as u32,  in device_number()
257     fn lookup_tty(&self, index: usize) -> Option<Arc<TtyCore>> {  in lookup_tty()
260             .lookup(index, TtyDriverPrivateData::Unused);  in lookup_tty()
263             return device_guard.get(&index).cloned();  in lookup_tty()
275         self.ttys.lock().insert(tty.index(), tty_core);  in standard_install()
301     pub fn init_tty_device(&self, index: Option<usize>) -> Result<Arc<TtyCore>, SystemError> {  in init_tty_device()
304         if let Some(i) = index {  in init_tty_device()
321             ports[core.index()].setup_internal_tty(Arc::downgrade(&tty));  in init_tty_device()
322             tty.set_port(ports[core.index()].clone());  in init_tty_device()
341     pub fn open_tty(&self, index: Option<usize>) -> Result<Arc<TtyCore>, SystemError> {  in open_tty()
344         if index.is_some() {  in open_tty()
345             if let Some(t) = self.lookup_tty(index.unwrap()) {  in open_tty()
357             tty = Some(self.init_tty_device(index)?);  in open_tty()