[TUHS] UNIX of choice these days?

[Clem Cole]

BTW the time it was added (4.4), most of the tools did not use it.   Which
was sad... and Ron points out.

On Sun, Sep 24, 2017 at 11:26 AM, Christian Barthel <bch at online.de> wrote:

> ron minnich <rminnich at gmail.com> writes:
>
> > [1:text/plain Hide]
> >
> > ptrace replaces procfs? Wow, that's a disappointing turn of events. It's
> > also against the flow of thought in the Unix community I knew in 1980. If
> > somebody has any of the old ca-1980 BSD manuals, you should find a BUGS
> > section on ptrace advocating a move to a file-system-like interface. I
> > always assumed ken wrote that little note when he was visiting UCB --
> > anybody know?
>
> I am also surprised to hear that ptrace replaces procfs.  In the 4.4BSD
> Book[1] is a chapter about process debugging (chapter 4) with ptrace and
> it says:
>
> ``The ptrace facility is inefficient for three reasons.  [...]''
>
> And later, it mentions the proc filesystem:
>
> ``To address these problems, 4.4BSD added a /proc filesystem, similar to
> the one found in UNIX Eight Edition [Killian, 1984]. [...]''
>
> [1] The Design and Implementation of the 4.4BSD Operating System,
> M.K. McKusic, Keith Bostic, Michael J Karels, and John Quarterman,
> Addison-Wesley, Reading, 1996, ISBN 0-201-54979-4.
>
> Kind regards,
> Christian
>
>
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