[TUHS] Lions' Commentary Revisions?

[Douglas McIlroy]

>> I'm curious, is anyone aware of any attempts to revise John Lions's UNIX
>> Commentary for versions beyond the Sixth Edition?

> As I understand it, this was prohibited for 7th Edition

It would be OK now, for the 7th edition source has been released, free of
the trade-secret constraint.

On Mon, Mar 4, 2024 at 1:46 PM Dan Cross <crossd at gmail.com> wrote:

> On Mon, Mar 4, 2024 at 1:41 PM segaloco via TUHS <tuhs at tuhs.org> wrote:
> > I hope everyone's having a lovely tail end of whichever season is
> gracing your
> > hemisphere.  Had some surprise snow this morning up in the NW corner of
> the US,
> > hoping it bodes well for a mild summer.
> >
> > I'm curious, is anyone aware of any attempts to revise John Lions's UNIX
> > Commentary for versions beyond the Sixth Edition?
>
> As I understand it, this was prohibited for 7th Edition and later by
> restrictions inserted into licenses for those versions. I don't know
> exactly how, as I'm not a lawyer.
>
> In terms of modern adaptations, there are commentaries for the Plan 9
> (3rd Edition) source code that are similar to Lions, and the xv6
> pedagogical system is accompanied by a similar commentary.
>
>         - Dan C.
>
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