From owner-freebsd-security Wed Aug 9 7: 6: 8 2000 Delivered-To: freebsd-security@freebsd.org Received: from testbed.baileylink.net (testbed.baileylink.net [63.71.213.24]) by hub.freebsd.org (Postfix) with ESMTP id A1D2037BAF7 for ; Wed, 9 Aug 2000 07:06:02 -0700 (PDT) (envelope-from brad@testbed.baileylink.net) Received: (from brad@localhost) by testbed.baileylink.net (8.9.3/8.9.3) id JAA38173 for freebsd-security@FreeBSD.ORG; Wed, 9 Aug 2000 09:06:26 -0500 (CDT) (envelope-from brad) Date: Wed, 9 Aug 2000 09:06:25 -0500 From: Brad Guillory To: FreeBSD-SECURITY Subject: Re: pine 4.21 port issues? Message-ID: <20000809090625.A35124@baileylink.net> Mail-Followup-To: FreeBSD-SECURITY References: <20000808201626.I261@speedy.gsinet> <200008091352.JAA18476@khavrinen.lcs.mit.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2i In-Reply-To: <200008091352.JAA18476@khavrinen.lcs.mit.edu>; from wollman@khavrinen.lcs.mit.edu on Wed, Aug 09, 2000 at 09:52:40AM -0400 Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org I thought that a significant reason for dot locks is flock does not reliably work over NFS. (Please correct me. I would like to be wrong on this one.) I don't think that this is relevant to FreeBSD-Security though. BMG On Wed, Aug 09, 2000 at 09:52:40AM -0400, Garrett Wollman wrote: > < said: > > > Well, does anybody now, how the locking against the MTA is done? > > Using kernel file locking. > > > How do multiple copies of the MTA lock against each other (e.g., > > multiple procmails) ? And how does finally an MUA lock against the > > MTA ? > > Same way. > > > Is there a convention (or a standard) for this locking? > > It's defined by the local mail delivery agent (in FreeBSD, > mail.local). If you read the manual page, this is quite clear. (Our > mail.local also creates .lock files, but these cannot be relied upon. > These files were originally created because early Unix didn't have > file locking, and have persisted thanks to Sun brain-damage.) Using > file locking permits MUAs to operate without any elevated privilege, > without requiring a world-writable spool directory > (although the MDA must still run as root in order to write to user > mailboxes and potentially chown new mailboxes to their respective > users). > > -GAWollman > > -- > Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same > wollman@lcs.mit.edu | O Siem / The fires of freedom > Opinions not those of| Dance in the burning flame > MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-security" in the body of the message -- __O | Information wants to be free! | __O Bike _-\<,_ | FreeBSD:The Power to Serve (easily) | _-\<,_ to (_)/ (_) | OpenBSD:The Power to Serve (securely) | (_)/ (_) Work To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message