From owner-freebsd-arch@freebsd.org  Mon Nov 30 04:28:47 2015
Return-Path: <owner-freebsd-arch@freebsd.org>
Delivered-To: freebsd-arch@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 55502A3C278
 for <freebsd-arch@mailman.ysv.freebsd.org>;
 Mon, 30 Nov 2015 04:28:47 +0000 (UTC)
 (envelope-from tim@kientzle.com)
Received: from monday.kientzle.com (kientzle.com [142.254.26.11])
 (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 2C94A14A4;
 Mon, 30 Nov 2015 04:28:46 +0000 (UTC)
 (envelope-from tim@kientzle.com)
Received: (from root@localhost)
 by monday.kientzle.com (8.14.4/8.14.4) id tAU4TklX080901;
 Mon, 30 Nov 2015 04:29:46 GMT (envelope-from tim@kientzle.com)
Received: from [192.168.2.108] (192.168.1.101 [192.168.1.101])
 by kientzle.com with SMTP id kwd69xp26pctbddtif9wb6tnte;
 Mon, 30 Nov 2015 04:29:46 +0000 (UTC)
 (envelope-from tim@kientzle.com)
Content-Type: text/plain; charset=us-ascii
Mime-Version: 1.0 (Mac OS X Mail 9.1 \(3096.5\))
Subject: Re: mtree "language" enhancements
From: Tim Kientzle <tim@kientzle.com>
In-Reply-To: <A5A83D40-6B19-465C-9042-3DB3FB127759@kientzle.com>
Date: Sun, 29 Nov 2015 20:28:42 -0800
Cc: Michal Ratajsky <michal.ratajsky@gmail.com>,
 Brooks Davis <brooks@freebsd.org>,
 "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org>
Content-Transfer-Encoding: quoted-printable
Message-Id: <0A51B6D4-9EDD-4EFF-876F-C6B515DBB4F3@kientzle.com>
References: <CANCZdfrDtfkwKxMV3o9tcQNzBQDKZdTx1JErkTKtC7UZORT5aA@mail.gmail.com>
 <AFF9BC5D-536B-4F7D-83CC-E26D9CBA8BF3@kientzle.com>
 <CANCZdfp+tCnXDkbMan9crp9YepVnZKT_hSw+i43OAzZX3VWhXg@mail.gmail.com>
 <A5A83D40-6B19-465C-9042-3DB3FB127759@kientzle.com>
To: Warner Losh <imp@bsdimp.com>, "Simon J. Gerraty" <sjg@juniper.net>
X-Mailer: Apple Mail (2.3096.5)
X-BeenThere: freebsd-arch@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: Discussion related to FreeBSD architecture <freebsd-arch.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-arch>,
 <mailto:freebsd-arch-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-arch/>
List-Post: <mailto:freebsd-arch@freebsd.org>
List-Help: <mailto:freebsd-arch-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-arch>,
 <mailto:freebsd-arch-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 30 Nov 2015 04:28:47 -0000


> On Nov 29, 2015, at 2:49 PM, Tim Kientzle <tim@kientzle.com> wrote:
>=20
> Simon also asked:
>> Indeed I'd really like the ability to provide default uid/gid
>> for the case that a uname/gname cannot be looked up.
>=20
> I think 'tar' got this right:  If uname and uid are both specified, =
then look up uname and if that fails, use the specified uid.  Ditto for =
gname/gid.  In particular, this lets a single specification be used to =
rebuild a tree on another system with different UIDs or on a system that =
does not (yet) have a full password file.  An option could be provided =
for the (rare) case that someone really wants to prefer UIDs to unames.

On further reflection, preferring UIDs to unames would actually be =
pretty common here.

In particular, NanoBSD (and Crochet and other similar tools) should =
prefer the UID when building images instead of looking up unames against =
the build host's password file.

Tim