FAQ 8.23 How can I open a pipe both to and from a command?

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8.23: How can I open a pipe both to and from a command?

    The IPC::Open2 module (part of the standard perl distribution) is an
    easy-to-use approach that internally uses pipe(), fork(), and exec() to
    do the job. Make sure you read the deadlock warnings in its
    documentation, though (see IPC::Open2). See "Bidirectional Communication
    with Another Process" in perlipc and "Bidirectional Communication with
    Yourself" in perlipc

    You may also use the IPC::Open3 module (part of the standard perl
    distribution), but be warned that it has a different order of arguments
    from IPC::Open2 (see IPC::Open3).


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