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Date:	Mon, 9 Mar 2009 11:21:52 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Replacing setup.exe and cygcheck with dpkg (Was: Re: cygcheck typo in both manpage and --help)
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On Mar  9 09:55, Andy Koppe wrote:
> Spiro Trikaliotis:
> > You can replace a running exe (or dll) by doing the following:
> >
> > 1. rename the .DLL or .EXE
> 
> Are you sure that's possible? I'd expect Windows to complain loudly at
> that point.

You can in theory, but that won't work reliably for subsequent Cygwin
processes.  If you replace a running processes' executable with a new
release, and if that process is one of the forking kind, every
subsequent call to fork() will break.  If you replace the Cygwin DLL
with a new release on the fly, then *any* subsequent fork() will almost
surely break.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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