[TUHS] The evolution of Unix facilities and architecture

[Clem Cole]

On Thu, May 11, 2017 at 12:52 PM, Warner Losh <imp at bsdimp.com> wrote:

> On Thu, May 11, 2017 at 10:15 AM, Clem Cole <clemc at ccc.com> wrote:
> >
> >
> >
> >
> >
> >
> > On Thu, May 11, 2017 at 10:07 AM, Noel Chiappa <jnc at mercury.lcs.mit.edu>
> > wrote:
> >>
> >>     > From: Clem Cole
> >>
> >>     > it was was originally written for the for the 6th edition FS
> (which
> >> I
> >>     > hope I have still have the sources in my files) ...
> >>     > I believe Noel recovered a copy in his files recently.
> >>
> >> Well, I have _something_. It's called 'fcheck', not 'fsck', but it looks
> >> like
> >> what we're talking about - maybe it was originally named, or renamed, to
> >> be in
> >> the same series as {d,i,n}check? But it does have the upper-case error
> >> messages... :-) Anyway, here it is:
> >>
> >>   http://ana-3.lcs.mit.edu/~jnc/tech/unix/s1/fcheck.c
> >>   http://ana-3.lcs.mit.edu/~jnc/tech/unix/man8/fcheck.8
> >
> >
> > fcheck ---> aka fsick  -- aka fsck -- that's it.
>
> There's a dcheck.c in the TUHS v7 sources. How's that related?
>
> ​Directory CHECK - was a pass down the upper level pathname structure of
the FS.
In fact it was the model for fsck.   Ted had me steer at it.  One of the
passes in pretty much pulled from that code directly.

The problem was that originally there were a couple of tools to put things
back together, but until Ted wrote fsck there was not one single tool that
pretty much did what you wanted and got it right most of the time.

Clem​





> Warner
>
>
> >> Interestingly, the man page for it makes reference to a 'check' command,
> >> which
> >> I didn't recall at all; here it is:
> >>
> >>   http://ana-3.lcs.mit.edu/~jnc/tech/unix/s1/check.c
> >>   http://ana-3.lcs.mit.edu/~jnc/tech/unix/man8/check.8
> >>
> >> for those who are interested.
> >>
> >>
> >>     > Noel has pointed out that MIT had it in the late 1970s also,
> >> probably
> >>     > brought back from BTL by one of their summer students.
> >>
> >> I think most of the Unix stuff we got from Bell (e.g. the OS, which is
> >> clearly
> >> PWB1, not V6) came from someone who was in a Scout unit there in high
> >> school,
> >
> > Jon Stienhart maybe???   He & Paul Rubinfield were in that scout group
> years
> > ago and were both long time UNIX hackers, but I've forgotten where
> Stienhart
> > did his undergrad.
> >
> >> of all bizarre connections! ISTR this came the same way, but maybe I'm
> >> wrong.
> >> It definitely arrived later than the OS - we'd be using icheck/dcheck
> for
> >> quite a while before it arrived - so maybe it was another channel?
> >
> > This is Ted's code and my error messages.
> >
> >>
> >> The only thing that for sure (that I recall) that didn't come this way
> was
> >> Emacs. Since the author had been a grad student in our group at MIT, I
> >> think
> >> you all can guess how we got that!
> >>
> >>         Noel
> >>
> > Clem
> >
>
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