[OT] POSIX question

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General question to any linux / unix gurus out there.

I know how to use pipes, and I know what they do.
Does anyone have a clue about how bash/csh/ksh etc handle them internally?

I have to duplicate this feat, and I can't see my way clear without fudging 
an answer that involves a temporary file and simple input/output 
redirection.

Any help appreciated, even rtfm if accompanied by links to said m.
=====================================================
.______<-------------------\__
/ _____<--------------------__|===
||_    <-------------------/
\__| Mr Trick

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