STREAMS
Unix System V framework / From Wikipedia, the free encyclopedia
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In computer networking, STREAMS is the native framework in Unix System V for implementing character device drivers, network protocols, and inter-process communication. In this framework, a stream is a chain of coroutines that pass messages between a program and a device driver (or between a pair of programs). STREAMS originated in Version 8 Research Unix, as Streams (not capitalized).
STREAMS's design is a modular architecture for implementing full-duplex I/O between kernel and device drivers. Its most frequent uses have been in developing terminal I/O (line discipline) and networking subsystems. In System V Release 4, the entire terminal interface was reimplemented using STREAMS.[1] An important concept in STREAMS is the ability to push drivers ā custom code modules which can modify the functionality of a network interface or other device ā together to form a stack. Several of these drivers can be chained together in order.