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cserialio(7)							  cserialio(7)

NAME    [Toc]    [Back]

     cserialio - character driver interface to serial communication ports

SYNOPSIS    [Toc]    [Back]


DESCRIPTION    [Toc]    [Back]

     On	Origin,	O2, Octane and Challenge/Onyx systems, the special files
     /dev/ttyc*	provide	a character based interface (as	opposed	to a streams
     based interface) to the system serial ports. The hardware accessed	by
     each special file is determined by	the portno portion of the pathname
     (see serial(7) for	further	details). The character	based interface	is
     intended to provide a low cost option for applications wishing to do bulk
     data transfer via the serial ports	with no	character interpretation.
     There is no line discipline associated with this port type	and no tty
     facilities	are provided.

IOCTLS    [Toc]    [Back]

     The ttyc ports support a limited subset of	the ioctl set used to control
     ordinary tty ports. Specifically, ioctl functions which relate directly
     to	the hardware are supported, whereas ioctl functions which relate to
     software functions	of the tty interface such as the line discipline are
     not supported and may either fail or be silently ignored. In addition,
     streams ioctls will fail since this is not	a streams device.

     For port hardware configuration, the ttyc interface supports the
     following ioctls as described in termio(7): TCGETA, TCSETA, TCSETAW,
     TCSETAF, TCGETS, TCSETS, TCSETSW, TCSETSF.	Not all	fields of the termio
     struct are	relevant to the	ttyc interface.	The following fields are
     supported as described in termio(7): c_ospeed, CSIZE, CSTOPB, PARENB,
     PARODD, CNEW_RTSCTS. In addition the port will generate a SIGINT on
     reception of a break char if IGNBRK is false and BRKINT is	true. Lastly,
     reads from	ttyc ports will	be non-blocking	if ICANON is false, and	VMIN
     and VTIME are 0. All other	fields of the termio struct are	silently

     The ttyc ports also honor the following ioctls as described in termio(7):

     Lastly, the following ioctls are supported	as described in	serial(7):

SEE ALSO    [Toc]    [Back]

     serial(7),	termio(7)

									PPPPaaaaggggeeee 1111
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