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Date:	Tue, 18 Feb 2003 16:59:30 +0100 (CET)
From:	Ronald Landheer-Cieslak <ronald AT landheer DOT com>
X-X-Sender:	ronald AT localhost DOT localdomain
To:	John Vincent <jpv50 AT hotmail DOT com>
cc:	B DOT Clewett AT roadrunner DOT uk DOT com, <cygwin AT cygwin DOT com>
Subject:	Re: Duplicate CygWin
In-Reply-To:	<F37KT2qeSqk0qcITzSO00000d4d@hotmail.com>
Message-ID:	<Pine.LNX.4.44.0302181645160.17626-100000@localhost.localdomain>
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As first post on this subject (but with a bogus subject line) started
with: "I need to have two copies of CygWin running.  Really I do!", the 
use of chroot never came to my mind, but you're right: one
$ chroot /full/path/to/new/tree
should do it :)

He'll have to make sure Cygwin1.dll is always found in the PATH, though. 
This renders it impossible from the Bash command-line, because PATH is 
mangled at start-up (of Bash), but from cmd, there is no problem (I just 
tried).

If this isn't what he's trying to do, I'm sure he'll get back to the list 
with his forking experiments :)

rlc


On Tue, 18 Feb 2003, John Vincent wrote:
> Hi there,
> 
> I may be missing something, but from you're original email
> it looks to me like you don't need another cygwin1.dll at all!
> 
> I think all you need is a script with a few calls to umount and
> mount to fix your file mount points and a call to chroot to change
> the file system root, plus some changes to the PATH environment
> variable.
> 
> Try "man chroot", "man umount" and "man mount" to see how these
> commands work. Then write a little shell script wrapper to run
> your application after changing the mount points, file system
> root, and environment appropriately.
> 
> I hope this suggestion helps.
> 
> /John Vincent.
> 
> >
> >(snipped from original posting)
> >Noting:- It's not a cut down version of CygWin*.DLL I need,
> >but a cut down version of the file system, to just a couple
> >of dozen files in /bin, /tmp, /usr and /etc, forming a 'mini'
> >UNIX for a specific application.
> >
> 
> 
> 
> 
> 
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