X-Recipient:	archive-cygwin AT delorie DOT com
DomainKey-Signature:	a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:date:from:to:subject:message-id:reply-to
	:references:mime-version:content-type:in-reply-to; q=dns; s=
	default; b=AeSGPGa3g03uPRcFz4lPBTd+cBBVobh2aBv5TzwRf+5ar/5RBbqcq
	cbPC2rwutQy3+oy/PAQcTKwPvUsU1fuSWVgH4IkVJfwQ4fN+3p17if0WG3xG9EKx
	KnNjGKGIRVXuZiaaco3vBFnsp3SjWllYdNf8T5Q0JZgaYGAPCaBpzA=
DKIM-Signature:	v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:date:from:to:subject:message-id:reply-to
	:references:mime-version:content-type:in-reply-to; s=default;
	bh=tucoUFabKlEIf5Kqr9/ddcWBErk=; b=XfQRyyqP4xPBbT1r9xejNEMOAXv6
	vV2Tvm3BWSmeJygGLIBK0dKKvLqD6qKYw7aWIedUgyfxUqJNGWnsRmHcOnCDfFHS
	OBfoWcWLiNGRBdJsefxL5nJpd6/IAhrqMWrbfdy4Lv8LaBtAwdePd69W5j+YLi8b
	omz3I9jA4/nlgEg=
Mailing-List:	contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id:	<cygwin.cygwin.com>
List-Subscribe:	<mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive:	<http://sourceware.org/ml/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender:	cygwin-owner AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
Delivered-To:	mailing list cygwin AT cygwin DOT com
Authentication-Results:	sourceware.org; auth=none
X-Spam-SWARE-Status:	No, score=-100.9 required=5.0 tests=BAYES_00,GOOD_FROM_CORINNA_CYGWIN,KAM_LAZY_DOMAIN_SECURITY,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.2 spammy=Stewart, stewart, username, HOME
X-HELO:	mout.kundenserver.de
Date:	Mon, 18 Feb 2019 09:45:18 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Windows to Cygwin username mapping: Domain before local account when duplicate name?
Message-ID:	<20190218084518.GS4256@calimero.vinschen.de>
Reply-To:	cygwin AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
References:	<CANV9t=SdQPZw_VF95HwDrVRU1KzdHA61GJBRgA1weHryHUO6-w AT mail DOT gmail DOT com> <20190215204326 DOT GO2702 AT calimero DOT vinschen DOT de> <CANV9t=Q5M+V9TPEN-GaGzLtK_8AO5fUenajQ+T-VZX6+kbrMMw AT mail DOT gmail DOT com> <3bace8f4-1097-9245-10e9-1ed54d1014f3 AT SystematicSw DOT ab DOT ca> <CANV9t=QDy6Y5X867vrq47jgxTUJU9h95kmmbeCWtotZroEcGaQ AT mail DOT gmail DOT com> <20190216094528 DOT GT2702 AT calimero DOT vinschen DOT de> <959f0e79-1ede-878a-6306-d0bdd8d7ef0e AT SystematicSw DOT ab DOT ca> <20190216153320 DOT GC4256 AT calimero DOT vinschen DOT de> <0d77615d-68fb-b1f4-114b-a91379371dc0 AT SystematicSw DOT ab DOT ca> <20190216174019 DOT GF4256 AT calimero DOT vinschen DOT de>
MIME-Version:	1.0
In-Reply-To:	<20190216174019.GF4256@calimero.vinschen.de>
User-Agent:	Mutt/1.10.1 (2018-07-13)

--1BKOZKwX7DAU5odC
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Feb 16 18:40, Corinna Vinschen wrote:
> On Feb 16 09:15, Brian Inglis wrote:
> > On 2019-02-16 08:33, Corinna Vinschen wrote:
> > > On Feb 16 08:09, Brian Inglis wrote:
> > >> On 2019-02-16 02:45, Corinna Vinschen wrote:
> > >>> On Feb 15 14:51, Bill Stewart wrote:
> > >>>> On Fri, Feb 15, 2019 at 2:38 PM Brian Inglis wrote:
> > >>>>> Windows normally allows "." to be used to refer to the local mach=
ine name in a
> > >>>>> domain context - can anyone confirm or deny whether this works in=
 Cygwin or with
> > >>>>> getent?
> > >>>> AFAICT, the "." shortcut does not work in Cygwin.
> > >>> The combining operator for domain prepended usernames is '+'.  This
> > >>> is the same character as used by good old Interix for the same purp=
ose.
> > >> That was not in question - the question was could .+$USER be used in=
 lieu of
> > >> $COMPUTERNAME+$USER or $HOSTNAME+$USER and should $COMPUTERNAME rath=
er than
> > >> $HOSTNAME be used in such contexts?
> > > Yeah, I misunderstood this, sorry.  The answer is no.  The username is
> > > fixed.  Otherwise you'd have two auto-generated passwd entries for the
> > > same user which may lead to confusion (not necessarily confusion on t=
he
> > > user side...)
> > > If this is a desired feature, we could try this, but it might break
> > > existing setups again.
> >=20
> > As with .\$USER in Windows or with ~ for $HOME, this should only be a
> > convenience to allow input or scripts to avoid providing $COMPUTERNAME/=
$HOSTNAME
> > in userid command line argument contexts.
>=20
> I added this to Cygwin for testing so you can simply use ".+username" as
> a shortcut for "$COMPUTERNAME+username".
>=20
> I uploaded snapshots to https://cygwin.com/snapshots for playing.

After some mulling, this is a bad idea.  It potentially allows to
circumvent OpenSSHs user/group name matching again, unless the
Admin knows to add every local user twice, e.g.

  Match user MACHINE+user,.+user

or use patterns:

  Match user *+user

I'll revert the patch again.


Corinna

--=20
Corinna Vinschen
Cygwin Maintainer

--1BKOZKwX7DAU5odC
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----
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=0wph
-----END PGP SIGNATURE-----

--1BKOZKwX7DAU5odC--

- Raw text -