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
    • Sending Messages
    • Retrieving Messages
    • Changing the Permissions (mode)
    • Deleting a Queue
  • Examples
  • The Source