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=Cb7VMZ1qx7/mWUilaArAjyZl2tqvyPWYPD1Xd3SYhZQWU8IO33Q7F
	dUWCV08B6R2C7UgOenVmrOKZTtH2xebiuIKzj7thjJEeFPO3PWkIJeH9WyRN0IUv
	dVRLKQXoaQSKgbLozbT7xG2AM+eF7dwNorZuPywvmKRygjRNyjlzXo=
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=piZnUL8hEB2NwbB0HiTeTZLa09k=; b=dKwOaX1AIoOKPpWgOd5ydGcIJpeI
	plpSSS0TPprMs3dulB/sdrCUJtww5bzcmaKSX50Ak7LMDYnIptQbpe+Ge5QE4QO/
	Amc4V7LIo9Y5pIDUGOPLlV9B+FH2wiDA8uTpQXg4G+0CDbfYPEfyiiLAIwQyY4tu
	0q0pvpDv7nKujR0=
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=-101.2 required=5.0 tests=AWL,BAYES_00,GOOD_FROM_CORINNA_CYGWIN,KAM_LAZY_DOMAIN_SECURITY,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.2 spammy=mails, H*r:mreue108, executive
X-HELO:	mout.kundenserver.de
Date:	Wed, 10 Oct 2018 13:22:40 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: grep < fifo fails
Message-ID:	<20181010112240.GL20270@calimero.vinschen.de>
Reply-To:	cygwin AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
References:	<d56a12c77ecc441ca7dc2e8e1862145c AT prosa DOT dk> <d8e9dbf61b6299cae6db6da3a25eabb8 AT smtp-cloud9 DOT xs4all DOT net> <bb7dfc32e67366d58d10eb4dc2eda7f5 AT smtp-cloud7 DOT xs4all DOT net> <8100972155fcccd61852c0c9e48cd11b AT smtp-cloud9 DOT xs4all DOT net> <4749b23a0374bf264ad46a0c7466e73e AT smtp-cloud9 DOT xs4all DOT net> <81eb7a95-1334-a421-46e3-64c51800947c AT redhat DOT com>
MIME-Version:	1.0
In-Reply-To:	<81eb7a95-1334-a421-46e3-64c51800947c@redhat.com>
User-Agent:	Mutt/1.9.2 (2017-12-15)

--ee6FjwWxuMujAVRe
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Oct  8 10:03, Eric Blake wrote:
> On 10/8/18 3:24 AM, Houder wrote:
> > grep fails on Cygwin because lseek() on Cygwin fails to recognize
> > that it is applied to a FIFO. As result of that, it returns EINVAL
> > in errno, where it should return ESPIPE.
> >=20
> > Receiving the wrong value in errno forces reset() (in src/grep.c)
> > to return false, upon which grep fails.
> >=20
> > Before v2.27 of grep, a call to S_ISREG(st->st_mode) in reset()
> > prevented the call of lseek() and made reset() return true.
> >=20
> > The call to S_ISREG() has been removed in v2.27 of grep.
> >=20
> > The solution would be either to correct Cygwin's executive or to
>=20
> s/executive/dll/
>=20
> > insert a Cygwin-specific kludge in grep (in reset() ).
>=20
> I see no reason to do a one-off kludge to my build of grep (since that do=
es
> not scale - every other app that also makes decisions based on errno valu=
es
> would have to make the same kludge), compared to just fixing cygwin1.dll =
for
> everyone.
>=20
> But thanks for isolating the problem!

I pushed a patch.  Thanks for tracking this down, Henri!


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

--ee6FjwWxuMujAVRe
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----
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=pfsl
-----END PGP SIGNATURE-----

--ee6FjwWxuMujAVRe--

- Raw text -