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From: mareb@levels.sait.edu.au
Newsgroups: comp.unix.msdos
Subject: Re: VPIX compatability questions
Message-ID: <15845.27a02219@levels.sait.edu.au>
Date: 25 Jan 91 12:18:33 GMT
References: <6025@spdcc.SPDCC.COM> <1991Jan17.041520.24159@tmsoft.uucp> <2546@westmark.WESTMARK.COM>
Organization: Sth Australian Inst of Technology
Lines: 17

In article <2546@westmark.WESTMARK.COM>, dave@westmark.WESTMARK.COM (Dave Levenson) writes:
> 
>> Is there a way to detect you are running inside of VPix?
> 
> You could try to write to a file in the root filesystem.
> You'll be allowed if you're in real MS-DOS, and not if you're under
> VP/ix, unless VP/ix was invoked by root.
> 
> 
> Anybody know a better way?

My guess is you could spawn true(1), the UNIX command, under VP/ix but
not under DOS. Of course, there are many UNIX-commands-for DOS around so
it might be better to ensure you are using RUNUNIX.EXE (or whatever that
command is called) mechanism.

	b++ (Bob Buckley)