#include <termios.h>

int tcgetattr(int fildes, struct termios *termios_p);


Partially implemented


IEEE Std 1003.1-2017


tcgetattr() - get the parameters associated with the terminal

The tcgetattr() function shall get the parameters associated with the terminal referred to by fildes and store them in the termios structure referenced by termios_p. The fildes argument is an open file descriptor associated with a terminal.

The termios_p argument is a pointer to a termios structure.

The tcgetattr() operation is allowed from any process.

If the terminal device supports different input and output baud rates, the baud rates stored in the termios structure returned by tcgetattr() shall reflect the actual baud rates, even if they are equal. If differing baud rates are not supported, the rate returned as the output baud rate shall be the actual baud rate. If the terminal device does not support split baud rates, the input baud rate stored in the termios structure shall be the output rate (as one of the symbolic values).

Return value#

Upon successful completion, 0 shall be returned. Otherwise, -1 shall be returned and errno set to indicate the error.


The tcgetattr() function shall fail if:

  • EBADF - The fildes argument is not a valid file descriptor.

  • ENOTTY - The file associated with fildes is not a terminal.



Known bugs#


See Also#

  1. Standard library functions

  2. Table of Contents