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AIX Version 4.3 Communications Programming Concepts

Differences Between Portable Streams Environment and V.4 STREAMS

Portable Streams Environment (PSE) was implemented from the AT&T UNIX System V Release 4, Programmer's Guide: STREAMS document. It is designed for compatibility with existing STREAMS applications and modules that adhere to the STREAMS design guidelines.

Extensions to STREAMS

In some areas, the STREAMS definition is extended to enhance functionality. These enhancements include:

Differences in PSE

Although PSE is written to the specifications in the AT&T document, there are places in which compatibility with the specification is not implemented or is not possible. These differences are:

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