tcattribute(3C) 														   tcattribute(3C)

NAME

       tcgetattr(), tcsetattr() - control tty device

SYNOPSIS

DESCRIPTION

       gets  the  parameters associated with fildes and stores them in the termios structure referenced by termios_p.  If the terminal device does
       not support split baud rates, the input baud rate stored in the termios structure is zero.  This function  is  allowed  from  a	background
       process (see termio(7)).  However, the terminal attributes can be subsequently changed by a foreground process.

       sets  the  parameters  associated  with fildes (unless support is required from underlying hardware that is not available) from the termios
       structure referenced by termios_p as follows:

	      o  If optional_actions is the change is immediate.

	      o  If optional_actions is the change occurs after all output written to fildes is transmitted.

	      o  If optional_actions is the change occurs after all output written to fildes is transmitted, and all input that has been  received
		 but not read is discarded.

RETURN VALUE

       Upon successful completion, a value of zero is returned.  Otherwise, a value of -1 is returned and is set to indicate the error.

ERRORS

       and fail if any of the following conditions are encountered:

       [EBADF]	      fildes is not a valid file descriptor.

       [EINVAL]       The optional_actions argument is not a proper value or no part of a request could be performed.

       [ENOTTY]       The file associated with fildes is not a terminal.

WARNINGS

       will  attempt to perform as much of the request as possible.  However, the hardware being used may not support all possible c_cflag values.
       If any part of the request can be performed, those values will be set, any values not supported by the hardware will be ignored,  and  will
       complete successfully.  If no part of the request can be performed, will fail and set to [EINVAL].

       For  any  hardware that does not support separate input and output baud rates, an attempt to set different input and output baud rates does
       not affect either baud rate.

       always returns the actual values set in hardware.  For any hardware that does not support separate input and  output  baud  rates,  returns
       zero for the input baud rate.

SEE ALSO

       cfspeed(3C), tccontrol(3C), thread_safety(5), termio(7).

STANDARDS CONFORMANCE

																   tcattribute(3C)