[TUHS] Excise process from a pipe

[Doug McIlroy]

In the suggested answer, the code changes but the process survives.

I suspect the answer to my original question is no, but I know only a tiny
fraction of the cumulative API of the extended Unix family.

Doug

>> Was there ever a
>> flavor of Unix in which a process could excise itself
>> from a pipeline without breaking the pipeline?
>
> If in the middle of a pipeline, all I can think of is:
>
>       close fd 0 and fd 1
>       dup() read end of pipe 1 to be stdin (fd 0)
>       dup() write end of pipe 2 to be stdout (fd 1)
>       exec("/bin/cat")