Inter-process communication-pipelines

Each process has a different user address space, the global variables of any one process can not be seen in another process, so the process to exchange data between the kernel, the kernel to open a buffer, process 1 data from the user space to the kernel buffer, process 2 and then read the data from the kernel buffer, This mechanism provided by the kernel is called interprocess communication (ipc,interprocess communication).

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Inter-process communication-pipelines