From owner-freebsd-hackers Wed Oct 6 19:25:16 1999 Delivered-To: freebsd-hackers@freebsd.org Received: from orion.ac.hmc.edu (Orion.AC.HMC.Edu [134.173.32.20]) by hub.freebsd.org (Postfix) with ESMTP id C0D061580E for ; Wed, 6 Oct 1999 19:24:19 -0700 (PDT) (envelope-from brooks@one-eyed-alien.net) Received: from localhost (brdavis@localhost) by orion.ac.hmc.edu (8.8.8/8.8.8) with ESMTP id TAA01436; Wed, 6 Oct 1999 19:24:14 -0700 (PDT) X-Authentication-Warning: orion.ac.hmc.edu: brdavis owned process doing -bs Date: Wed, 6 Oct 1999 19:24:13 -0700 (PDT) From: Brooks Davis X-Sender: brdavis@orion.ac.hmc.edu To: Pat Dirks Cc: FreeBSD Hackers Subject: Re: Apple's planned appoach to permissions on movable filesystems In-Reply-To: <199910070022.RAA26277@scv3.apple.com> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Wed, 6 Oct 1999, Pat Dirks wrote: > I'm sorry I didn't mention it in my original post but the plan is that > whenever a filesystem is "adopted" and the permissions are overwritten > the filesystem's ID is changed to prevent it being recognized as "local" > to any systems that previously knew it. If the filesystem's "adopted" > while retaining the privileges, the systems that recognize the filesystem > as "local" must be able to make sense of the same set of IDs (because > they're all from the same source, for instance) and it makes sense to > leave the filesystem ID unchanged. It must be possible to have a disk > that I can swap between two systems here on the floor when I know there > are no conflicting name <-> ID mappings, in which case the two systems > must know the filesystem in question by the same filesystem ID. One question, does the design take in to account a group of machines which share a set of fs IDs? I ask because otherwise, you couldn't have adopted filesystems that work in a computer lab environment where you have no choice to assume all the machines are identical without some really extreme pain. -- Brooks To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message