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Date: Tue, 10 Feb 2009 16:26:25 -0600 (CST)
From: Tim McDaniel <tmcd AT panix DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: RFE?: CygWinDir in ENV? (was Re: How does one find where Cygwin    was  installed from Windows?)
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On Tue, 10 Feb 2009, Larry Hall (Cygwin) wrote:
> Tim McDaniel wrote:
>> I have several "trampoline" scripts, a bat file
>> doing nothing but invoking a corresponding bash shell script or Perl
>> program.  I have to hard-code a location for the bash / perl
>> interpreter, but those locations change from user to user (some people
>> install under c:\, some under the standard location).  I would like to
>> have the scripts work for any system.
>
> This can be done now,

That appears to contradict what you wrote yesterday:

] If you need to do this generically for any batch file, then yes, you
] have to rely on external data and heuristics.  Going to the registry
] to see if it will help or searching the file system are two
] alternatives but there is no one key or one spot that will
] unequivocally give you the installation path.  Looking at the mount
] paths in the registry will work for 1.5 but is flawed for 1.7.
] Looking in the file-system may work depending on what you look for
] and where you start looking.

You did mention

] HKLM/Software/Cygwin/setup, the "rootdir" value.

But you noted that that is in version 1.7.

(When mentioning it, by the way, you might also mention REG.exe, a
program to do registry access, and the options for FOR that allow
running a program and getting the results in a variable in CMD.exe.
I hadn't heard of REG until I went searching just now.)

-- 
Tim McDaniel, tmcd AT panix DOT com

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