Mailing-List: contact cygwin-developers-help AT sourceware DOT cygnus DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-developers-subscribe AT sources DOT redhat DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin-developers/>
List-Post: <mailto:cygwin-developers AT sources DOT redhat DOT com>
List-Help: <mailto:cygwin-developers-help AT sources DOT redhat DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-developers-owner AT sources DOT redhat DOT com
Delivered-To: mailing list cygwin-developers AT sources DOT redhat DOT com
Date: Mon, 3 Sep 2001 20:53:57 -0400
From: Christopher Faylor <cgf AT redhat DOT com>
To: cygwin-developers AT cygwin DOT com
Subject: Re: CYGWIN SERVER: Some questions
Message-ID: <20010903205357.B3480@redhat.com>
Reply-To: cygwin-developers AT cygwin DOT com
Mail-Followup-To: cygwin-developers AT cygwin DOT com
References: <20010903140332 DOT C23714 AT cygbert DOT vinschen DOT de> <20010903105746 DOT B2024 AT redhat DOT com> <20010903174251 DOT E30211 AT cygbert DOT vinschen DOT de> <20010903155526 DOT B2523 AT redhat DOT com> <20010903235116 DOT A2421 AT cygbert DOT vinschen DOT de>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20010903235116.A2421@cygbert.vinschen.de>
User-Agent: Mutt/1.3.21i

On Mon, Sep 03, 2001 at 11:51:16PM +0200, Corinna Vinschen wrote:
>On Mon, Sep 03, 2001 at 03:55:26PM -0400, Christopher Faylor wrote:
>> On Mon, Sep 03, 2001 at 05:42:51PM +0200, Corinna Vinschen wrote:
>> >> How about mailboxes as the communication mechanism?  They share many
>> >> of the characteristics of named pipes, I believe but *I think* they
>> >> work on Windows 95.
>> >
>> >I'm not quite sure about the seriousness of this mail but if you
>> >refer to mailslots... they are just a one-way mechanism to push
>> >some data to another process. No real `communication' at all.
>> 
>> Oops.  Yes, I meant mail slots.  They are one directional, but so are
>> pipes.  You just open one mail slot for each direction.  Or, you use it
>> to synchronize a shared memory region.
>
>Named pipes under NT can be bidirectional by giving the
>PIPE_ACCESS_DUPLEX flag in call to CreateNamedPipe().

But we can't use named pipes.

>Mailslots have no security mechanism so they wouldn't be the
>TL I would choose for NT/W2K/XP.

Don't mail slots have the same security mechanism as files?

cgf