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Date:	Fri, 08 Nov 2002 08:17:02 -0800
To:	cygwin AT cygwin DOT com
From:	Randall R Schulz <rrschulz AT cris DOT com>
Subject:	Re: question about cygdrive flags string in the registry (Win
	2000)
In-Reply-To:	<F4SxzW234xOjIL2jpWk000007be@hotmail.com>
Mime-Version:	1.0

Vivian,

At 07:34 2002-11-08, Viviana Cotirlea wrote:
>Hi,
>
>I ported a database application on Windows 2000 using cygwin. For testing 
>reasons I put on a clean (no cygwin installed) Windows 2000 machine the 
>generated app.exe and the cygwin1.dll. For some reason the dbopen() call 
>failed when trying to read the created before database.
>After trying to investigating the problem, I found out that it is working 
>if in the registry the following data exists:
>HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2
>cygdrive flags 22
>
>If this is missing the dbopen() call will fail.
>
>My question is: Because at one point I would like to distribute the 
>product to others also, and I don't want to obligate them to install the 
>cygwin, I would like to know why this string is required, and if my only 
>solution would be to add that key in the registry if the cygwin is not 
>already installed on that machine?


Attempting to hide your application's dependence on Cygwin is not a good 
idea. We have a steady stream (well, a trickle, anyway) of people who 
install Cygwin and immediately have problems because unbeknownst to them, 
something they installed earlier (sometimes a long time ago) included a 
Cygwin1.dll and multiple Cygwin DLLs on a given system don't coexist well.

I'm no lawyer, but be aware of your obligations under the open source 
license under which Cygwin is made available (whatever they are).


>Thanks a lot,
>viv


Randall Schulz
Mountain View, CA USA


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