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STREAMS Programming Guide
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Document Information

Preface

Part I Application Programming Interface

1.  Overview of STREAMS

What Is STREAMS?

STREAMS Definitions

Stream as a Data Path

Stream Head

STREAMS Module

STREAMS Device Driver

STREAMS Data

Message Queues

Communicating With a STREAMS Device

STREAMS Multiplexing

STREAMS Polling

Message Transfer Flow Control

When to Use STREAMS

How STREAMS Works--Application Interface

Opening a Stream

Closing a Stream

Controlling Data Flow

Simple Stream Example

How STREAMS Works at the Kernel Level

Creating the Stream Head

Message Processing

Structure of a STREAMS Device Driver

Message Components

Message Queueing Priority

Structure of a Message Queue

Configuring Multiplexed Streams

Multithreading the Kernel

Service Interfaces

Manipulating Modules

Protocol Portability

Protocol Substitution

Protocol Migration

Module Reusability

2.  STREAMS Application-Level Components

3.  STREAMS Application-Level Mechanisms

4.  Application Access to the STREAMS Driver and Module Interfaces

5.  STREAMS Administration

6.  Pipes and Queues

Part II Kernel Interface

7.  STREAMS Framework - Kernel Level

8.  STREAMS Kernel-Level Mechanisms

9.  STREAMS Drivers

10.  STREAMS Modules

11.  Configuring STREAMS Drivers and Modules

12.  Multithreaded STREAMS

13.  STREAMS Multiplex Drivers

Part III Advanced Topics

14.  Debugging STREAMS-based Applications

Part IV Appendixes

A.  Message Types

B.  Kernel Utility Interface Summary

C.  STREAMS-Based Terminal Subsystem

D.  STREAMS FAQ

Glossary

Index

Chapter 1

Overview of STREAMS

This chapter provides a foundation for later chapters. Background and simple definitions are followed by an overview of the STREAMS mechanisms. Because the application developer is concerned with a different subset of STREAMS interfaces than the kernel-level developer, application and kernel levels are described separately.