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From: "Hughes, Bill" <Bill DOT Hughes AT cox DOT co DOT uk>
To: cygwin AT cygwin DOT com
Subject: RE: A good way to test if Cygwin isn't installed?
Date: Fri, 1 Oct 2004 10:52:43 +0100
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luke DOT kendall AT cisra DOT canon DOT com DOT au wrote:
> I just wanted to run an idea past the list.
> 
> I want to write a shell script to test if Cygwin has been installed on
> the machine running the shell script.
> 
> I do this by running a shell (from a network install of Cygwin if
> necessary). 
> 
> If Cygwin is installed on the local machine, then "cygpath -w /"
> returns something like "c:\cygwin".  (Good for discovering what drive
> Cygwin was installed on, right?)  If Cygwin has not been installed,
> "cygpath -w /" returns a plain old backslash.
> 
> That's fine - maybe even great.  My question: is that a
> reliable way to
> perform that test?  It seems good to me.
> 
> I'm working my way towards a shell script that installs or upgrades
> Cygwin on a machine that may or may not have Cygwin installed, and do
> all our local post-install stuff (which is a lot of stuff), and also
> test that at least the major packages from the install work properly.

What if you don't have cygwin in your path until it's started?
Wouldn't it be better to check to see if the cygwin hive is present in the
registry,
and if necessary verify the mount data from there?

Bill
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