Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Delivered-To: mailing list cygwin@cygwin.com Date: Mon, 4 Jul 2005 09:58:14 +0200 From: Corinna Vinschen To: cygwin@cygwin.com Subject: Re: Accessing Windows devices Message-ID: <20050704075814.GS21074@calimero.vinschen.de> Reply-To: cygwin@cygwin.com Mail-Followup-To: cygwin@cygwin.com References: <42F12280.5060504@herbertland.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <42F12280.5060504@herbertland.com> User-Agent: Mutt/1.4.2i On Aug 3 13:01, Tom Herbert wrote: > Hello, > I am creating my own Windows device driver and would like to be able to > access it through applications in Cygwin (normal device operations-- > open, close, read, write, ioctl). I understand that there is support > for a number of POSIX devices (described in user's guide), but haven't > found a way to access other native Windows devices. Is there any way to > accomplish this in Cygwin? There's no direct support in Cygwin to access Windows devices. All device access is going the official way through the Win32/NT layer. If your application calls open(), Cygwin actually calls CreateFile or NTCreateFile. If you can live with Cygwin handling the device like a file, then you can try to give the device a DOS name using DefineDosDevice and access it using the \\.\devicename syntax. Maybe that's all. If not, you'll have to actually add code to Cygwin which implements accessing your device. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Project Co-Leader mailto:cygwin@cygwin.com Red Hat, Inc. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/