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The Art of Unix Programming
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Unix Programming - Taxonomy of Unix IPC Methods - Wrappers

Wrappers

The opposite of a shellout is a wrapper . A wrapper creates a new interface for a called program, or specializes it. Often, wrappers are used to hide the details of elaborate shell pipelines. We'll discuss interface wrappers in Chapter11. Most specialization wrappers are quite simple, but nevertheless very useful.

As with shellouts, there is no associated protocol because the programs do not communicate during the execution of the callee; but the wrapper usually exists to specify arguments that modify the callee's behavior.


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The Art of Unix Programming
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