[TUHS] Shell control through external commands

[clemc@ccc.com (Clem Cole)]

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On Sun, Sep 11, 2016 at 1:39 PM, Doug McIlroy <doug at cs.dartmouth.edu> wrote:

> I recall Dennis discussing the feature at some length before installing it.
> So the exact semantics, especially the injected argument, are almost]
> certainly his. I don't know whether he built on a model from elsewhere.
> #! appeared between v7 (1979) and v8 (1985). As v8 was never released,
> it clearly made its way into the world via BSD and USG. BSD, being
> more nimble, was likely first.
>

​Well that tracks my memory. I also thought it was from BSD, although it
might have come from some place else like Harvard, MIT, Ill, Rice or the
like.  It is not in the V7 sources in Warren's code repository but I do
remember it in my customized V7 (polite form of hacking)​ at Tektronix on
our 11/70 and 11/44 in late 1979/early 1980 before I went to UCB.  But I do
not remember that extension @ CMU (the tapes which I have had a hard time
getting read so I can not check).

I'm a little hazy, but I think it means that Mark Bales/Jim Kleckner gave
it to me with BSD stuff when we picked up csh, vi and pas @ Tek - which we
originally did in drips and drabs - during their time as summer students.
 (I would not get an official set of 1BSD or 2BSD tapes for Tek until right
before I left for Berkeley a couple of years later).

BTW: It's also possible that's how fsck originally made it back to UCB (but
tjk might have given it to Joy directly), as Mark and Jim took back my
collection of CMU hacks at the end of that summer which was either 79 or
80.  I do remember Mark being impressed with fsck.

Clem
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