Chapter 15. POSIX IPC
The classical UNIX interprocess communication (IPC) mechanisms of shared memory, message queues and semaphore sets are standardized in the POSIX:XSI Extension. These mechanisms, which allow unrelated processes to exchange information in a reasonably efficient way, use a key to identify, create or access the corresponding entity. The entities may persist in the system beyond the lifetime of the process that creates them, but conveniently, POSIX:XSI also provides shell commands to list and remove them.
- Learn about classical interprocess communication
- Experiment with synchronized shared memory
- Explore semaphore implementations
- Use message queues for interprocess logging
- Understand the consequences of persistence
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