From owner-freebsd-questions@FreeBSD.ORG Fri Nov 18 20:13:14 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 2F30C1065675 for ; Fri, 18 Nov 2011 20:13:14 +0000 (UTC) (envelope-from feenberg@nber.org) Received: from mail2.nber.org (mail2.nber.org [66.251.72.79]) by mx1.freebsd.org (Postfix) with ESMTP id C22D68FC1E for ; Fri, 18 Nov 2011 20:13:13 +0000 (UTC) Received: from nber6.nber.org (nber6.nber.org [66.251.72.76]) by mail2.nber.org (8.14.4/8.14.4) with ESMTP id pAIKDAZs030897; Fri, 18 Nov 2011 15:13:11 -0500 (EST) (envelope-from feenberg@nber.org) Received: from localhost (feenberg@localhost) by nber6.nber.org (8.14.4/8.14.4/Submit) with ESMTP id pAIKBQVS004740; Fri, 18 Nov 2011 15:11:26 -0500 (EST) X-Authentication-Warning: nber6.nber.org: feenberg owned process doing -bs Date: Fri, 18 Nov 2011 15:11:25 -0500 (EST) From: Daniel Feenberg X-X-Sender: feenberg@nber6 To: Kirk Strauser In-Reply-To: <92484812-3407-4A4B-B1BB-E0B5F3EDD06C@strauser.com> Message-ID: References: <201111181727.pAIHR9XZ057564@mail.r-bonomi.com> <92484812-3407-4A4B-B1BB-E0B5F3EDD06C@strauser.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Anti-Virus: Kaspersky Anti-Virus for Linux Mail Server 5.6.39/RELEASE, bases: 20111118 #5754440, check: 20111118 clean Cc: freebsd-questions@freebsd.org, Robert Bonomi Subject: Re: Shouldn't GNU tar be ignoring /proc with --one-file-system? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 18 Nov 2011 20:13:14 -0000 On Fri, 18 Nov 2011, Kirk Strauser wrote: > On Nov 18, 2011, at 11:27 AM, Robert Bonomi wrote: > >> See the output of 'mount(8)' for the names of all the mounted filesystems on >> your machine. > > $ mount | grep proc > procfs on /proc (procfs, local) > >> >> *NOTE*WELL* that '/proc' is *not* a separate filesystem. It is merely a >> _directory_ with a bunch of 'special' files in it. > > I'm confused here. In what way isn't /proc a separate filesystem? It's > even called "procfs". I just went to an 8.1 system as root and did: umount /proc and /proc dismounted leaving an empty directory in route. I then went mount /proc and /proc was mounted again, using the parameters in /etc/fstab. Surely that means that going from / to /proc is "crossing a filesystem boundary". To me that suggests it is a separate filesystem, and typically /proc is filled with stuff that you wouldn't want to recurse through, so I wouldn't think it a good candidate for special casing as non-mounted. Daniel Feenberg NBER > > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org" >