From mboxrd@z Thu Jan  1 00:00:00 1970
From: doug@cs.dartmouth.edu (Doug McIlroy)
Date: Wed, 09 Jul 2014 22:49:22 -0400
Subject: [TUHS] Subject:unpipeIt'seasy for a process to insert a new process
 intoapipelineeither upstream or down unpipe
Message-ID: <201407100249.s6A2nMh3017869@coolidge.cs.dartmouth.edu>

It's easy for a process to insert a new process into a
pipeline either upstrean or downstream. Was there ever a 
flavor of Unix  in which a process could excise itselfa
from a pipeline without breaking the pipeline?
Doug