Quote: the 8 1/2 windowing system uses a full-duplex pipe for all I/O requests; a new window forks a process and mounts the pipe as /dev; a unique ID identifies the window's pipe

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When 8 1/2 starts, it creates a full-duplex … provide. One end will be shared by all … a user makes a new window … , 8 1/2 allocates the window data structures … [The user mounts /dev to the client end of the pipe]; 8 1/2's response is a unique identifier … derived from that 'mount'.   Google-1   Google-2

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Topic: Unix pipes (10 items)