Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422923AbWBIRgw (ORCPT ); Thu, 9 Feb 2006 12:36:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1422922AbWBIRgw (ORCPT ); Thu, 9 Feb 2006 12:36:52 -0500 Received: from linux01.gwdg.de ([134.76.13.21]:50144 "EHLO linux01.gwdg.de") by vger.kernel.org with ESMTP id S1422923AbWBIRgv (ORCPT ); Thu, 9 Feb 2006 12:36:51 -0500 Date: Thu, 9 Feb 2006 18:36:46 +0100 (MET) From: Jan Engelhardt To: Joerg Schilling cc: peter.read@gmail.com, matthias.andree@gmx.de, linux-kernel@vger.kernel.org, jim@why.dont.jablowme.net Subject: Re: CD writing in future Linux (stirring up a hornets' nest) In-Reply-To: <43EB7BBA.nailIFG412CGY@burner> Message-ID: References: <200602031724.55729.luke@dashjr.org> <43E7545E.nail7GN11WAQ9@burner> <73d8d0290602060706o75f04c1cx@mail.gmail.com> <43E7680E.2000506@gmx.de> <20060206205437.GA12270@voodoo> <43E89B56.nailA792EWNLG@burner> <20060207183712.GC5341@voodoo> <43E9F1CD.nail2BR11FL52@burner> <20060208162828.GA17534@voodoo> <43EA1D26.nail40E11SL53@burner> <20060208165330.GB17534@voodoo> <43EB0DEB.nail52A1LVGUO@burner> <43EB7210.nailIDH2JUBZE@burner> <43EB7BBA.nailIFG412CGY@burner> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1473 Lines: 38 >> >> >Please explain me: >> >> > >> >> >- how to use /dev/hd* in order to scan an image from a scanner >> >> >- how to use /dev/hd* in order to talk to a CPU device >> >> >- how to use /dev/hd* in order to talk to a tape device >> >> >- how to use /dev/hd* in order to talk to a printer >> >> >- how to use /dev/hd* in order to talk to a jukebox >> >> >- how to use /dev/hd* in order to talk to a graphical device >> >> > >> >> With /dev/sg, this was possible? >> > >> >Of course! >> > >> But you need to open the correct /dev/sg[0-9] too, don't you? >> (otherwise cdrecord would set the jukebox on fire) > >This is why the mapping engine is in the Linux adoption part of >libscg. It maps the non-stable device <-> /dev/sg* relation to a >stable b,t,l address. > Right. The question was rather like this: Say we have our non-stable /dev/sr0 mapping to /dev/sg0, and it has got BTL 1,1,0. Now, if the user starts `cdrecord -dev=1,1,0`, `ls -l /proc/$(pidof -s cdrecord)/fd/` should show (and in fact did when I used ide-scsi back then) /dev/sg0, right? If so, what's wrong with just opening /dev/sg0 directly (as per user request, i.e. cdrecord -dev=/dev/sg0) and sending the scsi commands down the fd? Jan Engelhardt -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/