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6 Linux Interprocess Communications

Abstract:

A detailed overview of the IPC (interprocess communication facilities) facilities implemented in the Linux Operating System.

• 6.1 Introduction
• 6.2 Half-duplex UNIX Pipes
  • 6.2.1 Basic Concepts
  • 6.2.2 Creating Pipes in C
  • 6.2.3 Pipes the Easy Way!
  • 6.2.4 Atomic Operations with Pipes
  • 6.2.5 Notes on half-duplex pipes:
• 6.3 Named Pipes (FIFOs - First In First Out)
  • 6.3.1 Basic Concepts
  • 6.3.2 Creating a FIFO
  • 6.3.3 FIFO Operations
  • 6.3.4 Blocking Actions on a FIFO
  • 6.3.5 The Infamous SIGPIPE Signal
• 6.4 System V IPC
  • 6.4.1 Fundamental Concepts
    • IPC Identifiers
    • IPC Keys
    • The ipcs Command
    • The ipcrm Command
  • 6.4.2 Message Queues
    • Basic Concepts
    • Internal and User Data Structures
      • Message buffer
      • Kernel msg structure
      • Kernel msqid_ds structure
      • Kernel ipc_perm structure
    • SYSTEM CALL: msgget()
    • SYSTEM CALL: msgsnd()
    • SYSTEM CALL: msgctl()
    • msgtool: An interactive message queue manipulator
      • Background
      • Command Line Syntax
      • Examples
      • The Source
  • 6.4.3 Semaphores
    • Basic Concepts
    • Internal Data Structures
      • Kernel semid_ds structure
      • Kernel sem structure
    • SYSTEM CALL: semget()
    • SYSTEM CALL: semop()
    • SYSTEM CALL: semctl()
    • semtool: An interactive semaphore manipulator
      • Background
      • Command Line Syntax
      • Examples
      • The Source
    • semstat: A semtool companion program
  • 6.4.4 Shared Memory
    • Basic Concepts
    • Internal and User Data Structures
      • Kernel shmid_ds structure
    • SYSTEM CALL: shmget()
    • SYSTEM CALL: shmat()
    • SYSTEM CALL: shmctl()
    • SYSTEM CALL: shmdt()
    • shmtool: An interactive shared memory manipulator
      • Background
      • Command Line Syntax
      • Examples
      • The Source

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