A pipe stream is a kind of buffered process stream that has a communication channel with the process via an operating system pipe. A pipe is an interprocess communication channel of fixed size that is implemented by various operating systems.

All instances of pipe stream also have smalltalk 'buffers' (usually <OsPipeStreamBuffer>) that allow for efficient reading and writing.

<details>

new

<pre><code> Answer a new pipe stream

</code></pre> </details>

<details>

on:

<pre><code> Answer a new pipe stream on pipe descriptor with the default buffer size for the concrete subclass

</code></pre> </details>

<details>

on:withBufferSize:

<pre><code> Answer a new pipe stream on pipe descriptor with the defined buffer size

</code></pre> </details>

<details>

withBufferSize:

<pre><code> Answer a new pipe stream with the defined buffer size

</code></pre> </details>

<details>

close

  Close the pipe.
     Assume the pipe is closed if the descriptor is nil
     The pipeDescriptor will be nil after the call (via prim)

</details>

<details>

isAccessible

<pre><code> Answer true if the pipe descriptor is valid and accessible

</code></pre> </details>

<details>

isBytes:

<pre><code> If true, adjust the buffers to store bytes. If false, adjust the buffers to store chars. Inform the @stream

</code></pre> </details>

<details>

isClosed

<pre><code> A pipe stream is considered closed if the associated descriptor is nil

</code></pre> </details>