Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932081AbWBJNNz (ORCPT ); Fri, 10 Feb 2006 08:13:55 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932083AbWBJNNz (ORCPT ); Fri, 10 Feb 2006 08:13:55 -0500 Received: from linux01.gwdg.de ([134.76.13.21]:18884 "EHLO linux01.gwdg.de") by vger.kernel.org with ESMTP id S932081AbWBJNNy (ORCPT ); Fri, 10 Feb 2006 08:13:54 -0500 Date: Fri, 10 Feb 2006 14:13:50 +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: <43EC72E3.nailISD4HI9WC@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> <43EC72E3.nailISD4HI9WC@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: 1280 Lines: 30 >> 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? > >As I did write _many_ times, this was done by the program "cdwrite" on Linux >in 1995 and as cdwrite did not check whether if actually got a CD writer, >cdwrite did destroy many hard disk drives just _because_ the /dev/sg* >is non-stable. > >People did not believe this and did write shell scripts with e.g. /dev/sg0 >inside and later suffered from the non-stable /dev/sg* <-> device relation. > Exactly. But, if I now say -dev=1,1,0 instead of e.g. -dev=/dev/sg0, who or what makes sure that 1,1,0 {is not | does not map to} a harddisk? 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/