From owner-freebsd-questions@FreeBSD.ORG Sun Sep 16 19:38:10 2012 Return-Path: Delivered-To: freebsd-questions@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 2C36D106564A for ; Sun, 16 Sep 2012 19:38:10 +0000 (UTC) (envelope-from matthew@FreeBSD.org) Received: from smtp.infracaninophile.co.uk (smtp6.infracaninophile.co.uk [IPv6:2001:8b0:151:1:3cd3:cd67:fafa:3d78]) by mx1.freebsd.org (Postfix) with ESMTP id 892288FC15 for ; Sun, 16 Sep 2012 19:38:09 +0000 (UTC) Received: from seedling.local (host109-150-6-11.range109-150.btcentralplus.com [109.150.6.11]) (authenticated bits=0) by smtp.infracaninophile.co.uk (8.14.5/8.14.5) with ESMTP id q8GJbu2p016872 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO) for ; Sun, 16 Sep 2012 20:38:05 +0100 (BST) (envelope-from matthew@FreeBSD.org) X-DKIM: OpenDKIM Filter v2.5.2 smtp.infracaninophile.co.uk q8GJbu2p016872 Authentication-Results: smtp.infracaninophile.co.uk/q8GJbu2p016872; dkim=none (no signature); dkim-adsp=none X-Authentication-Warning: lucid-nonsense.infracaninophile.co.uk: Host host109-150-6-11.range109-150.btcentralplus.com [109.150.6.11] claimed to be seedling.local Message-ID: <50562A8C.9040504@FreeBSD.org> Date: Sun, 16 Sep 2012 20:37:48 +0100 From: Matthew Seaman User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:15.0) Gecko/20120907 Thunderbird/15.0.1 MIME-Version: 1.0 To: freebsd-questions@FreeBSD.org References: <50562121.2030507@dreamchaser.org> In-Reply-To: <50562121.2030507@dreamchaser.org> X-Enigmail-Version: 1.4.4 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigB93CD8044CA08CCDAF74E8ED" X-Virus-Scanned: clamav-milter 0.97.5 at lucid-nonsense.infracaninophile.co.uk X-Virus-Status: Clean X-Spam-Status: No, score=3.1 required=5.0 tests=BAYES_00,RCVD_IN_PBL, RDNS_DYNAMIC,SPF_SOFTFAIL autolearn=no version=3.3.2 X-Spam-Level: *** X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on lucid-nonsense.infracaninophile.co.uk Cc: Subject: Re: What are negative permissions? 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: Sun, 16 Sep 2012 19:38:10 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigB93CD8044CA08CCDAF74E8ED Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 16/09/2012 19:57, Gary Aitken wrote: > Can someone explainn to me what "negative group permissions" are? It's where the group ownership of a file gives it fewer permissions than are allowed for the world in general. Suppose you have a file with these permissions and ownership: foo bar -rwx---r-x The owner -- foo -- has full read, write and execute permissions on the file. Anyone has read and execute permissions. But the group -- bar -- has no permissions. Now, logically, you might think that the world permissions would override the lack of group permissions, but in fact, that's not what happens. Permissions like that mean 'everyone *except* members of group bar can read and execute this. Cheers, Matthew --=20 Dr Matthew J Seaman MA, D.Phil. PGP: http://www.infracaninophile.co.uk/pgpkey --------------enigB93CD8044CA08CCDAF74E8ED Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.16 (Darwin) Comment: Using GnuPG with Mozilla - http://www.enigmail.net/ iEYEARECAAYFAlBWKpQACgkQ8Mjk52CukIy1tACgk3QO0CShNnQWGnQe6K4AzNkB bYYAnj2xRgMFKBRAnyJL2NhYlWzDTDTz =KyYr -----END PGP SIGNATURE----- --------------enigB93CD8044CA08CCDAF74E8ED--