From owner-freebsd-fs@FreeBSD.ORG Sat Nov 3 10:39:00 2012 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 8F481A62 for ; Sat, 3 Nov 2012 10:39:00 +0000 (UTC) (envelope-from peter@rulingia.com) Received: from vps.rulingia.com (host-122-100-2-194.octopus.com.au [122.100.2.194]) by mx1.freebsd.org (Postfix) with ESMTP id 1F6D68FC08 for ; Sat, 3 Nov 2012 10:38:59 +0000 (UTC) Received: from server.rulingia.com (c220-239-241-202.belrs5.nsw.optusnet.com.au [220.239.241.202]) by vps.rulingia.com (8.14.5/8.14.5) with ESMTP id qA3Acu8A070477 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Sat, 3 Nov 2012 21:38:56 +1100 (EST) (envelope-from peter@rulingia.com) X-Bogosity: Ham, spamicity=0.000000 Received: from server.rulingia.com (localhost.rulingia.com [127.0.0.1]) by server.rulingia.com (8.14.5/8.14.5) with ESMTP id qA3AcooG096861 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 3 Nov 2012 21:38:50 +1100 (EST) (envelope-from peter@server.rulingia.com) Received: (from peter@localhost) by server.rulingia.com (8.14.5/8.14.5/Submit) id qA3Aco3H096860; Sat, 3 Nov 2012 21:38:50 +1100 (EST) (envelope-from peter) Date: Sat, 3 Nov 2012 21:38:49 +1100 From: Peter Jeremy To: Garrett Cooper Subject: Re: Inconsistent/potentially incorrect behavior with relative lookups via chdir(2) on UFS/ZFS Message-ID: <20121103103849.GD12996@server.rulingia.com> References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="tjCHc7DPkfUGtrlw" Content-Disposition: inline In-Reply-To: X-PGP-Key: http://www.rulingia.com/keys/peter.pgp User-Agent: Mutt/1.5.21 (2010-09-15) Cc: FreeBSD FS X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 03 Nov 2012 10:39:00 -0000 --tjCHc7DPkfUGtrlw Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On 2012-Nov-01 15:25:05 -0700, Garrett Cooper wrote: > Just doing some interop testing on UFS/ZFS to develop a baseline for >filesystem behavior, and I noticed some inconsistencies with the ENOENT >requirement in chdir(2) when dealing with relative ".." paths (dot-dot >lookups). In particular... > 1. I would have expected chdir('.') to have failed in UFS/ZFS with >ENOENT if '.' wasn't present, but it didn't. > 2. I would have expected chdir('..') to have failed in ZFS with ENOENT >if '..' wasn't present, but it didn't. > Sidenote: python doesn't do any special handling with os.chdir, per >Modules/posixmodule.c (I checked). > The full test I ran is included below. Whilst playing with the above, I've found some wierd timing issues with UFS+SU: $ mkdir -p ~/p/q/r;sync $ cd p/q/r $ rm -r ~/p; while date; do sleep 3 ; ls -al;done Sat 3 Nov 2012 21:29:19 EST total 2 drwxr-xr-x 0 peter jeremy 512 3 Nov 21:28 . drwxr-xr-x 0 peter jeremy 0 3 Nov 21:29 .. Sat 3 Nov 2012 21:29:22 EST total 2 drwxr-xr-x 0 peter jeremy 512 3 Nov 21:28 . drwxr-xr-x 0 peter jeremy 0 3 Nov 21:29 .. Sat 3 Nov 2012 21:29:25 EST total 2 drwxr-xr-x 0 peter jeremy 512 3 Nov 21:28 . drwxr-xr-x 0 peter jeremy 0 3 Nov 21:29 .. Sat 3 Nov 2012 21:29:28 EST total 2 drwxr-xr-x 0 peter jeremy 512 3 Nov 21:28 . drwxr-xr-x 0 peter jeremy 0 3 Nov 21:29 .. Sat 3 Nov 2012 21:29:31 EST total 2 drwxr-xr-x 0 peter jeremy 512 3 Nov 21:28 . drwxr-xr-x 0 peter jeremy 0 3 Nov 21:29 .. Sat 3 Nov 2012 21:29:34 EST total 2 drwxr-xr-x 0 peter jeremy 512 3 Nov 21:28 . drwxr-xr-x 0 peter jeremy 0 3 Nov 21:29 .. Sat 3 Nov 2012 21:29:37 EST total 2 drwxr-xr-x 0 peter jeremy 512 3 Nov 21:28 . drwxr-xr-x 0 peter jeremy 0 3 Nov 21:29 .. Sat 3 Nov 2012 21:29:40 EST total 2 drwxr-xr-x 0 peter jeremy 512 3 Nov 21:28 . drwxr-xr-x 0 peter jeremy 0 3 Nov 21:29 .. Sat 3 Nov 2012 21:29:43 EST total 2 drwxr-xr-x 0 peter jeremy 512 3 Nov 21:28 . drwxr-xr-x 0 peter jeremy 0 3 Nov 21:29 .. Sat 3 Nov 2012 21:29:46 EST total 0 Sat 3 Nov 2012 21:29:49 EST --=20 Peter Jeremy --tjCHc7DPkfUGtrlw Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iEYEARECAAYFAlCU9DkACgkQ/opHv/APuIeaLwCgkB8JgG9tSfydF3USTldqC2lF qMgAnidEXpy1og79YMoP/EredHHaDHfI =pnFO -----END PGP SIGNATURE----- --tjCHc7DPkfUGtrlw--