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:date:from:to:subject:message-id:reply-to :references:mime-version:content-type:in-reply-to; q=dns; s= default; b=wsowW2ZZIbG+OlyAwjA2mn0A7xBAPAaTocu/VY2o6jkpS/LjTDW23 XmMBxVjRIVVDo5EWccUCf1sEt9yevqAVH282wHHqk4wwVIKhyaba8sn4nTDcmVEU ujto1xukJ8OM2qTJFR2W9PtwrlUqdrwQUwPen0Yioh3+MUKDrDlXLw= 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:date:from:to:subject:message-id:reply-to :references:mime-version:content-type:in-reply-to; s=default; bh=VUjy+Gf86N6wC/0SJYEireQg91Q=; b=mLMPm1zZN1My00M+60pPEKGdykru y+4e2dVRknN+b7wWRVPT1ymShaYcMIFq7ztFFJSHIi910lNaPlcrDq5g0x9yb7lX kIQopXDx1pg0nqobUzNTr8cAvqct2ssh7hmak3VxgQ+v9zv3yw39FPSYQnHd+1DE spbnvkoHrFgX7ZI= Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com X-Spam-SWARE-Status: No, score=0.2 required=5.0 tests=AWL,BAYES_50,RDNS_NONE autolearn=no version=3.3.1 Date: Fri, 26 Jul 2013 20:24:35 +0200 From: Corinna Vinschen To: cygwin AT cygwin DOT com Subject: Re: ptys - I give up Message-ID: <20130726182435.GA2303@calimero.vinschen.de> Reply-To: cygwin AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com References: <20130726061334 DOT GA3780 AT ednor DOT casa DOT cgf DOT cx> <51F21AD0 DOT 5090107 AT dancol DOT org> <20130726152702 DOT GC4495 AT ednor DOT casa DOT cgf DOT cx> <51F2A21F DOT 60302 AT dancol DOT org> <20130726163508 DOT GA25789 AT calimero DOT vinschen DOT de> <51F2AA0C DOT 4040903 AT dancol DOT org> <20130726171017 DOT GV5086 AT calimero DOT vinschen DOT de> <51F2B0B9 DOT 9000807 AT dancol DOT org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <51F2B0B9.9000807@dancol.org> User-Agent: Mutt/1.5.21 (2010-09-15) On Jul 26 10:24, Daniel Colascione wrote: > On 7/26/2013 10:10 AM, Corinna Vinschen wrote: > > On Jul 26 09:55, Daniel Colascione wrote: > >> In Windows 8, the implementation is completely different. There, console handles > >> are real kernel objects. > > > > Really? That's entirely new to me. Do you know if there's some description > > available? What are the implications? Are console handles now handles to > > something like named pipes as well? Is there a console FS comparable to > > \Device\NamedPipe\? > > I don't know the details, and I'm not aware of any new facilities exposed to > applications. I'd have loved a pseudoconsole API, but we didn't get one. I see a new device called \Device\ConDrv and \GLOBAL?? now contains symlinks CON -> \Device\ConDrv\Console CONIN$ -> \Device\ConDrv\CurrentIn CONOUT$ -> \Device\ConDrv\CurrentOut > You can see the difference in a debugger, though: console pseudohandles *look* > strange and don't show up in the process handle table. The difference shouldn't Console handle value % 4 != 0 > really matter, though: applications shouldn't really care what kind of handles > they get as long as system APIs accept them. The problem with writes larger than > 8k (I think that was the limit?) to console handles failing seems to have > disappeared, though. Uhm... there was a problem? I don't see a hint on the net, nor on MSDN. The Cygwin DLL uses a maximum buffer size of 16K for console writes. If there's some documented problem, maybe we should reduce the size to 8K. > > But then again, doesn't that mean that your method stops working on W8? > > Not really --- it'll work fine. The difference means that operations on console > handles that used not to work on Windows 7 might work on Windows 8. The public > API contract hasn't changed, however, so applications aren't supposed to be > doing these things anyway, and as long as application developers care about > testing their applications on Windows 7, they won't. > > If you eventually do start seeing applications that do things with console > handles that can't be done with console pseudohandles, well, you can hook more > APIs to preserve the console handle illusion. But that time is a long way away, > if it ever arrives at all. I guess you're right. Thanks, Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat -- 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