'peeking' in on a pipe

[Reynolds McClatchey]

In article <6.24B47361 at seaeast.WA.COM>, Tim.Evans at f112.n138.z1.WA.COM (Tim Evans) writes:
> I would like to 'peek' in on a pipe, to see what is happening in it, WHILE
> IT EXECUTES. I tried something like this, but no luck:
>  
>   some_stuff | tee `tty` | more_stuff

See Unix World Sept 87 for branch & combine C source by Brian Keen.
They enable you to pump into or tap out of a pipe. I've found them useful.

Reynolds McClatchey   uunet!safn2!rey