Path: utzoo!attcan!uunet!zaphod.mps.ohio-state.edu!usc!elroy.jpl.nasa.gov!ncar!gatech!purdue!haven!adm!smoke!gwyn
From: gwyn@smoke.brl.mil (Doug Gwyn)
Newsgroups: comp.lang.c
Subject: Re: Unix and C
Message-ID: <14446@smoke.brl.mil>
Date: 12 Nov 90 15:54:13 GMT
References: <4458@mint39.UUCP> <1929@necisa.ho.necisa.oz> <2679@cirrusl.UUCP>
Organization: U.S. Army Ballistic Research Laboratory, APG, MD.
Lines: 10

In article <2679@cirrusl.UUCP> dhesi%cirrusl@oliveb.ATC.olivetti.com (Rahul Dhesi) writes:
>Given that one can write vi macros that create a Turing machine, ...

That is certainly NOT given.  In fact, it's obvious that a Turing machine
cannot be implemented at all.

>... it should be possible to rewrite UNIX in vi.

Also not true, because UNIX has some performance constraints that any
implementation in "vi" command language would be unable to meet.