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STREAMS Programming Guide

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Updated: November 2020

STREAMS Programming Guide

Document Information

Using This Documentation

Part I STREAMS Application Programming Interface

Chapter 1 Overview of STREAMS

Chapter 2 STREAMS Application-Level Components

STREAMS Interfaces

Opening a STREAMS Device File

Queue Allocation

Adding and Removing Modules

Closing the Stream

Stream Construction Example

Chapter 3 STREAMS Application-Level Mechanisms

Chapter 4 Application Access to the STREAMS Driver and Module Interfaces

System Calls Used

Module and Driver ioctl Calls

Chapter 5 STREAMS Administration

Administration Tools

Autopush Facility

Administration Tool Description

Chapter 6 Pipes and Queues

Overview of Pipes and FIFOs

Creating and Opening Pipes and FIFOs

Part II STREAMS Kernel Interface

Part III STREAMS Advanced Topics

Part IV STREAMS Appendixes

STREAMS Glossary

Language:

System Calls Used

The following list shows the system calls used in controlling and transferring data and messages within a stream. The calls are listed by man page.

read(2): Reads data from a stream
write(2): Writes data to a stream
ioctl(2): Controls a stream
getmsg(2): Receives a message at the stream head
getpmsg(2): Receives a priority message at the stream head
putmsg(2): Sends a message downstream
putpmsg(2): Sends a priority message downstream
poll(2): Identifies files on which a user can send or receive messages, or on which certain events have occurred
pipe(2): Creates a bidirectional channel that provides a communication path between multiple processes

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