From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1KNjpR-0004e7-5P for qemu-devel@nongnu.org; Tue, 29 Jul 2008 03:41:05 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1KNjpP-0004dA-Gg for qemu-devel@nongnu.org; Tue, 29 Jul 2008 03:41:04 -0400 Received: from [199.232.76.173] (port=45580 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1KNjpP-0004d6-6l for qemu-devel@nongnu.org; Tue, 29 Jul 2008 03:41:03 -0400 Received: from 85.189.31.174.proweb.managedbroadband.co.uk ([85.189.31.174]:35300 helo=mail.maht0x0r.net) by monty-python.gnu.org with smtp (Exim 4.60) (envelope-from ) id 1KNjpO-0001Vi-4f for qemu-devel@nongnu.org; Tue, 29 Jul 2008 03:41:03 -0400 Date: Tue, 29 Jul 2008 07:40:55 +0100 Subject: Re: [Qemu-devel] [PATCH] qcow3 - arbitrary metadata From: maht Content-Type: text/plain; format=flowed; delsp=yes; charset=utf-8 MIME-Version: 1.0 References: <56C8EED4-ED25-4F11-B41A-F0937DAE75BF@lvivier.info> <488E891E.6000000@codemonkey.ws> Content-Transfer-Encoding: 7bit Message-ID: In-Reply-To: Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org For what it's worth from an outsider, imho in-band singnalling (which is what arbitrary meta-data is) is bone-headed. It's the same reason extended attributes are stupid. You are going to poison your file format because you think command line arguments are cumbersome. You're then going to need a set of extra tools to modify said metadata, you wont be able to use the standard set of tools sed/grep/awk/ed to change them. You're going to have to add code to parse them and over-ride them; for what ? Because you think a script is untidy. Plus, for all your talk about the subject you could have coded it up by now! Plus la change. Matt