15     syscall::SystemError,
63     ) -> Result<&'a mut TtyFilePrivateData, SystemError> {  in verify_file_private_data()  argument
67         return Err(SystemError::EIO);  in verify_file_private_data()
78     pub fn check_rw_param(&self, len: usize, buf: &[u8]) -> Result<(), SystemError> {  in check_rw_param()  argument
80             return Err(SystemError::EINVAL);  in check_rw_param()
86     pub fn input(&self, buf: &[u8]) -> Result<usize, SystemError> {  in input()  argument
95             TtyError::Closed => return Err(SystemError::ENODEV),  in input()
98                 return Err(SystemError::EBUSY);  in input()
120     fn open(&self, data: &mut FilePrivateData, mode: &FileMode) -> Result<(), SystemError> {  in open()  argument
134             return Err(SystemError::EINVAL);  in open()
148     ) -> Result<usize, SystemError> {  in read_at()  argument
171                 return Err(SystemError::ECONNABORTED);  in read_at()
182     ) -> Result<usize, SystemError> {  in write_at()  argument
199             return Err(SystemError::EPERM);  in write_at()
209         return Err(SystemError::EIO);  in write_at()
212     fn poll(&self) -> Result<crate::filesystem::vfs::PollStatus, SystemError> {  in poll()  argument
213         return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);  in poll()
224     fn list(&self) -> Result<alloc::vec::Vec<alloc::string::String>, SystemError> {  in list()  argument
225         return Err(SystemError::EOPNOTSUPP_OR_ENOTSUP);  in list()
228     fn metadata(&self) -> Result<Metadata, SystemError> {  in metadata()  argument
232     fn close(&self, _data: &mut FilePrivateData) -> Result<(), SystemError> {  in close()  argument
236     fn sync(&self) -> Result<(), SystemError> {  in sync()  argument
251                 _ => return Err(SystemError::EIO),  in sync()
291 pub fn tty_init() -> Result<(), SystemError> {  in tty_init()
304         return Err(SystemError::EEXIST);  in tty_init()