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:message-id:date:from:mime-version:to:subject
	:references:in-reply-to:content-type; q=dns; s=default; b=XdI5ru
	ikHQVPPPWEzD6v4RfRMjvbCTPLt1S1HuWS3lNV068hocvjBVSY8HGS15vvSz/qYF
	WrfFNM4PiE9Ow6v1aq+iHJum6CrDBWNIzjJ40adA9fYVgMTmToKZeIkXagKao7zI
	AHLGJkeF84Yoywx+G0lUnMOI0bRSMuC66Bqww=
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:message-id:date:from:mime-version:to:subject
	:references:in-reply-to:content-type; s=default; bh=EuyUwpOsk0/V
	ozrNxk7kJfdZ0io=; b=uFcdWkudW8wScR2uGIC+aLcM6X0j3Hj0zyJjviDPSLNd
	Sg36nEFXkiCkeUbZckYMvoZJT8/bXTmzT7sGy5YwhrZK5C17LgJIn6SuCQ2wSotL
	6rLPTqxMOrgTCgy6ToRmttIXd57DNjdcwYABzoj5oze4hMH1ag2A36rlBch/F1w=
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=-2.0 required=5.0 tests=AWL,BAYES_00,SPF_HELO_PASS,SPF_PASS,T_RP_MATCHES_RCVD autolearn=ham version=3.3.2
X-HELO: mx1.redhat.com
Message-ID: <54C254E6.7030408@redhat.com>
Date: Fri, 23 Jan 2015 07:04:22 -0700
From: Eric Blake <eblake AT redhat DOT com>
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.4.0
MIME-Version: 1.0
To: cygwin AT cygwin DOT com
Subject: Re: opendir(/dev/fd/n) should fail
References: <20150123094322 DOT GA5612 AT calimero DOT vinschen DOT de> <20150123105430 DOT 210869D0 DOT helmut DOT karlowski AT ish DOT de> <20150123110034 DOT B8F3A9F0 DOT helmut DOT karlowski AT ish DOT de>
In-Reply-To: <20150123110034.B8F3A9F0.helmut.karlowski@ish.de>
OpenPGP: url=http://people.redhat.com/eblake/eblake.gpg
Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="P6NMpAoEdIXiSdRomDuV2NvEjfAoTXUR0"
X-IsSubscribed: yes

--P6NMpAoEdIXiSdRomDuV2NvEjfAoTXUR0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable

On 01/23/2015 03:00 AM, Helmut Karlowski wrote:
>=20
> --------------------------------------------------
> Helmut Karlowski <helmut DOT karlowski AT ish DOT de> wrote:
> (23/01/2015 10:54)
>>
>> It's not just bash. The same happens in my home-grown shell. Starting=20
>> with /dev/fd/3 opendir succeeds giving (only the opendir-entries):
>=20
> Maybe it's because:
>=20
> 3 -> /proc/3008/fd/
>=20
> which recurses into /dev/fd again?

Yep. You'd get similar behavior for:

ln -s . dot

then trying to do a recursive listing of ./dot/**

Without some form of symlink recursion detection (aka "have we seen the
inode of this directory higher up in the tree?"), this will affect any
symlink-to-directory hierarchy loop.  Might be worth reporting it
upstream to see if bash is willing to add an inode hash table to prevent
infinite recursion on ** expansions across symlink loops, but as it is
not a cygwin-specific issue, I'm not going to try and do anything about
it downstream in the cygwin build of bash.

--=20
Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org


--P6NMpAoEdIXiSdRomDuV2NvEjfAoTXUR0
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="signature.asc"

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
Comment: Public key at http://people.redhat.com/eblake/eblake.gpg
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/

iQEcBAEBCAAGBQJUwlTmAAoJEKeha0olJ0NqRxEH/jjyk/9gp/zR0RYfaeGZLEtw
hkSK5BtPgLZXL9H46IQNy+Fk9mysMedzo81y9Bwenz1if9ReoYKfc0eYloZrX/lr
P3hEx9hON9XLHsR0mltvTcm6uOCSoo0g+tFGDJK2gjWqeHlgWWWsLodjwpzynFlg
vIYgYCA/TAtcYH09jW28ncTtHHQ3xLIwzG31duBGWh2KuNqpQDbXURnr1LjWbDEQ
4b82QhL0Sd5QR3JMmsUOLM++21DA4ON6oqTPvrvJ7Iz+yrE8w4KEfdZxvjJTbsWe
fRH+gcmANBpBIVVF0frnEBDhrnk5UpWhdOLp9/UZgj/l4711280yBvUdxHr7LRs=
=afuC
-----END PGP SIGNATURE-----

--P6NMpAoEdIXiSdRomDuV2NvEjfAoTXUR0--