tcgetattr - get parameters associated with terminal

Syntax	#include <termios.h> int tcgetattr(int fildes, struct termios *termios_p);
Description	tcgetattr() reads the parameters of the terminal associated with fildes and writes them into the termios structure pointed to by termios_p. fildes is a file descriptor associated with a terminal. termios_p is a pointer to a termios structure. tcgetattr() may be executed from any process. tcgetattr() can be called from a background process, and the terminal attributes can then be modified from a foreground process. Extension The output baud rate always corresponds to the input baud rate and is equal to 38400 (see tcsetattr() for details). (End) If the terminal device does not support split baud rates, the input baud rate stored in the termios structure will be 0.
Return val.	0 -1	if successful. if an error occurs. errno is set to indicate the error.
Errors	tcgetattr() will fail if:
	EBADF	fildes is not a valid file descriptor.
	Extension
	EINVAL	An attempt was made to access a BS2000 file. (End)
	ENOTTY	The file associated with fildes is not a terminal.
See also	tcsetattr(), termios.h, section “General terminal interface”.