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Terminal device control

Terminal device control

This section discusses the general terminal interface to control asynchronous communication ports. The functions on the termio(7) manual page are used to access and configure the hardware interface to a terminal.

Also included is a discussion of the mechanisms involved with opening and closing a terminal device file, as well as input/output processing.

The remainder of this section addresses the STREAMS mechanism as it relates to terminal device control. The STREAMS-based terminal subsystem provides a uniform interface for implementing character I/O devices and networking protocols in the kernel. Also discussed here is the notion of the STREAMS-based pseudo-terminal subsystem which provides the user with an identical interface to the STREAMS-based terminal subsystem.


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