X-Recipient:	archive-cygwin AT delorie DOT com
X-SWARE-Spam-Status:	No, hits=-6.7 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_HI,SPF_HELO_PASS,TW_MK,T_RP_MATCHES_RCVD
X-Spam-Check-By:	sourceware.org
Message-ID:	<4C6B2072.1080903@redhat.com>
Date:	Tue, 17 Aug 2010 17:51:14 -0600
From:	Eric Blake <eblake AT redhat DOT com>
User-Agent:	Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.7) Gecko/20100720 Fedora/3.1.1-1.fc13 Lightning/1.0b2pre Mnenhy/0.8.3 Thunderbird/3.1.1
MIME-Version:	1.0
To:	cygwin AT cygwin DOT com
Subject:	Re: mknod bug? major minor's are whacky
References:	<5FFFAB3EC03D09468D160693F176A1174EE2A922 AT CANOPUS>
In-Reply-To:	<5FFFAB3EC03D09468D160693F176A1174EE2A922@CANOPUS>
X-IsSubscribed:	yes
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

--------------enig7C247E3EEEEDBE16419DB7F5
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

On 08/17/2010 05:46 PM, Bob Goldberg wrote:
> cygwin 1.7.6
>=20
> attempting to:
> $ mknod null c 1 3
>=20
> what I get is:
> crw-rw-rw- 1 user mkgroup-l-d 46200, 14467 2010-08-17 18:44 null
>=20
> WHERE did those crazy major/minor's come from!?!?

The fact that your owner is mkgroup-l-d is probably a hint - my guess is
that cygwin is returning -1 because you haven't set up your user
database correctly, rather than an actual device number.  If that's the
case, then cygwin could probably be fixed (device major/minor node
numbers need not depend on whether the user database is set up correctly).

At any rate, Cygwin does not necessarily use the same major/minor node
numbers as Linux.  Any use of mknod outside of creating named pipes is
_highly_ platform dependent, and your best bet is to read the source
code for the actual node numbers that cygwin supports rather than
relying on something that worked for Linux.

--=20
Eric Blake   eblake AT redhat DOT com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org


--------------enig7C247E3EEEEDBE16419DB7F5
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.14 (GNU/Linux)
Comment: Public key at http://people.redhat.com/eblake/eblake.gpg
Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org/

iQEcBAEBCAAGBQJMayByAAoJEKeha0olJ0NqE8UIAK4mQQBwdzw8pZgtbuY2L+Vx
oy5JfoST+MzEvHBj7TkCY+9n7RnWQmDE1hQfkEFDnPQWJoRFEHTbkOgFQz/KMWWO
zfcYkR8K+gZXq5kFzTrVK3xxA4cVmeNWCDPjqnY/J26U5wq4eYZC825X0ITXCZFx
vvTwii/SJH85fDHr3EclaHe6QveJ1YSFM18m9r0L6c/eFTP0dk2GJKgbg73E0/Fx
LiSq6qqMEVTaZyDCDIAS85HJMSVblf2DdVi4a8fPsu5VTiOSlXAuEF37bFvuhTYV
PVed86Sjar3LgrCEJkMEqCWYV40hypZ/uOq4jDAFZUUoVlX16BE7am5X0bF1tW0=
=R3ZE
-----END PGP SIGNATURE-----

--------------enig7C247E3EEEEDBE16419DB7F5--

- Raw text -