X-Recipient:	archive-cygwin AT delorie DOT com
DomainKey-Signature:	a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:subject:to:references:from:message-id:date
	:mime-version:in-reply-to:content-type
	:content-transfer-encoding; q=dns; s=default; b=H+LyrXnldwjAkn17
	LwAQfOC4d7ZxpIQ/3pGnIKB8ZqicIf86xshajgFx/yz2kwt14pgi1vC/y9pHtwkI
	JmdvfWq6XUjwhx/TbRCkeTb9ZSYuSA3ABnTdNnjybvSqKNrgtkHr7CAcmli+WQJI
	GgWx0PDjfvs9A/i64xDXc6+0lgc=
DKIM-Signature:	v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:subject:to:references:from:message-id:date
	:mime-version:in-reply-to:content-type
	:content-transfer-encoding; s=default; bh=PhTwT54zi07TZVqmFeMhnG
	wBohM=; b=Q6NKVwsirkuotNVyMNKZlIguon0mx31434SVCN0uDt7hj6MGJ490Bw
	yp7fk3q+syfYQ2A4oKRJnfxmKnQPenh8C/7j8uK4YfZK77GpAhVrGzDg6mXQvat/
	qKPK/URdNZuOSXPSZJkMZvMjh4eoeCp5hscL/XrXMFtJsSgQlk0eU=
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
Authentication-Results:	sourceware.org; auth=none
X-Virus-Found:	No
X-Spam-SWARE-Status:	No, score=-2.9 required=5.0 tests=AWL,BAYES_00,RP_MATCHES_RCVD,SPF_HELO_PASS,SPF_PASS autolearn=ham version=3.3.2 spammy=H*r:ip*192.168.1.5, Hx-spam-relays-external:!192.168.1.5!, H*RU:!192.168.1.5!, H*f:sk:6031de0
X-HELO:	limerock03.mail.cornell.edu
X-CornellRouted:	This message has been Routed already.
Subject:	Re: System shutdown messages
To:	cygwin AT cygwin DOT com
References:	<d7122da5-24b5-7209-74a9-83d7484872ce AT cornell DOT edu> <6031de0d-846a-f006-3c1a-d2af7cfb4590 AT dronecode DOT org DOT uk>
From:	Ken Brown <kbrown AT cornell DOT edu>
Message-ID:	<fe815ed1-84aa-13a3-094e-ef178c92c746@cornell.edu>
Date:	Mon, 9 May 2016 14:08:39 -0400
User-Agent:	Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.0
MIME-Version:	1.0
In-Reply-To:	<6031de0d-846a-f006-3c1a-d2af7cfb4590@dronecode.org.uk>
X-PMX-Cornell-Gauge:	Gauge=XXXXX
X-IsSubscribed:	yes

On 5/9/2016 1:20 PM, Jon Turney wrote:
> On 09/05/2016 14:35, Ken Brown wrote:
>> A Cygwin emacs user has asked
>> (http://debbugs.gnu.org/cgi/bugreport.cgi?bug=23483) whether emacs can
>> auto-save files when he shuts down Windows from the Start Menu.  Is
>> there a way for a Cygwin process to listen for Windows system shutdown
>> messages?
>
> This seems entirely possible using the Win32 API.
>
> For emacs-w32, it's probably straightforward to handle WM_ENDSESSION in
> the message loop similarly to WM_CLOSE
>
> (Note that the process will be terminated if you return from processing
> a WM_ENDSESSION message)
>
> For emacs-nox and emacs-x11 it's more complex, as you'd have to create
> your own hidden window to receive the WM_ENDSESSION, and either select()
> on a /dev/windows fd or block in GetMessage() on a separate thread.
>
> (see [1] for an example of the latter approach as used in the X server)
>
> But I'm not sure that's the best approach, or if wouldn't be more
> appropriate to arrange for SIGTERM to be sent to emacs (or whatever) by
> mintty or the X server when an WM_ENDSESSION is received...

Thanks, Jon.  Yes, the latter approach seems much better.  Of course, SHTDI.

Ken


--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

- Raw text -