Mailing-List: contact cygwin-apps-help AT sourceware DOT cygnus DOT com; run by ezmlm
Sender: cygwin-apps-owner AT sourceware DOT cygnus DOT com
List-Subscribe: <mailto:cygwin-apps-subscribe AT sources DOT redhat DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin-apps/>
List-Post: <mailto:cygwin-apps AT sources DOT redhat DOT com>
List-Help: <mailto:cygwin-apps-help AT sources DOT redhat DOT com>, <http://sources.redhat.com/lists.html#faqs>
Delivered-To: mailing list cygwin-apps AT sources DOT redhat DOT com
X-Envelope-Sender-Is: Andrej DOT Borsenkow AT mow DOT siemens DOT ru (at relayer david.siemens.de)
From: Borsenkow Andrej <Andrej DOT Borsenkow AT mow DOT siemens DOT ru>
To: cygwin-apps AT cygwin DOT com
Subject: RE: Proposed RPM Installer Design
Date: Mon, 30 Jul 2001 16:21:31 +0400
Message-ID: <006601c118f2$2aa715f0$21c9ca95@mow.siemens.ru>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: 7bit
X-Priority: 3 (Normal)
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0)
In-Reply-To: <15203.4909.782758.517882@coyote.priv.helixdigital.com>
Importance: Normal
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2479.0006


Quoting the design document:

============
- The user can manually shutdown the running Cygwin applications, and after
doing so, can retry the installation.

- The user can have the launcher automatically shutdown the running Cygwin
applications, which will result in cygwin1.dll being unloaded from memory.
[***NOTE*** The best way to shutdown the apps would be to send them a SIGHUP
first, waiting for a few seconds, and then sending them a SIGTERM, mimicking
the way Unix shuts down. However, this would require dynamically loading the
Cygwin DLL and calling signal(). I don't know if this is actually possible.]

- The user can terminate the installation.
=============

What about services? You have at least two problems here:

- normal user usually cannot stop service. This is part of more general
problem - assuming that the original installation was done as administrator
(a must for system-wide installation) can installer detect if normal user
tries to run it? It may result in partial and thus broken installation. OTOH
it is pretty possible for several users to have private Cygwin
installations.

- is it enough to just kill service process? Won't it be interpreted by
Windows as service failed (probably yes)? On Unix it is done as part of RPM
pre/post script (service stop inetd/service start inetd), but we are trapped
on Windows as the above should happen before RPM runs. I do not see easy
solution here.

-andrej