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Programming Interfaces Guide     Oracle Solaris 11 Information Library
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Document Information


1.  Memory and CPU Management

2.  Remote Shared Memory API for Oracle Solaris Clusters

3.  Session Description Protocol API

4.  Process Scheduler

5.  Locality Group APIs

6.  Input/Output Interfaces

7.  Interprocess Communication

Pipes Between Processes

Named Pipes

Sockets Overview

POSIX Interprocess Communication

POSIX Messages

POSIX Semaphores

POSIX Shared Memory

System V IPC

Permissions for Messages, Semaphores, and Shared Memory

IPC Interfaces, Key Arguments, and Creation Flags

System V Messages

Initializing a Message Queue

Controlling Message Queues

Sending and Receiving Messages

System V Semaphores

Initializing a Semaphore Set

Controlling Semaphores

Semaphore Operations

System V Shared Memory

Accessing a Shared Memory Segment

Controlling a Shared Memory Segment

Attaching and Detaching a Shared Memory Segment

8.  Socket Interfaces

9.  Programming With XTI and TLI

10.  Packet Filtering Hooks

11.  Transport Selection and Name-to-Address Mapping

12.  Real-time Programming and Administration

13.  The Oracle Solaris ABI and ABI Tools

A.  UNIX Domain Sockets


Named Pipes

Named pipes function much like pipes, but are created as named entities in a file system. This enables the pipe to be opened by all processes with no requirement that they be related by forking. A named pipe is created by a call to mknod(2). Any process with appropriate permission can then read or write to a named pipe.

In the open(2) call, the process opening the pipe blocks until another process also opens the pipe.

To open a named pipe without blocking, the open(2) call joins the O_NDELAY mask (found in sys/fcntl.h) with the selected file mode mask using the Boolean or operation on the call to open(2). If no other process is connected to the pipe when open(2) is called, -1 is returned with errno set to EWOULDBLOCK.