System V Interprocess Communication

Linux uses mechanisms introduced in System V (SysV) to support interprocess communication and synchronization for user processes. System calls provide various routines to enable user libraries (typically the C standard library) to implement the required operations.

In addition to semaphores, the SysV scheme of interprocess communication includes an option for exchanging messages and sharing memory areas between processes in accordance with a controlled pattern as described below.7

Continue reading here: System V Mechanisms

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