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=DEjm5H2XaqOhkWGXCFhOvjcm2dQoP1Hei0xNpQurC3PMjBNCdJrpj
	iidaGRrbPRrPKV9NbYHEWaGSAHmoLEUbCt+5PSTpghiv42Z6g+c7p04zJ3+losQC
	F57vdzyjmTXRPp9+fZrkhFadMp80lub5nQVT3sg3dT1/R3+kwtxQPg=
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=7Ofg+EsvHvFexda6fybtHfBG1Yw=; b=ZmTd3VvkMoNvX165Ow6JmsXIgFFM
	9KKHOZoJuIt+2H7067FMTkKLMRWTcyT/dQ8daWvPkxQOZUv07Y1mwg2Xljra8ciS
	EOZ9bF3drjRUlkjR4EUo+9Yw/oUrVBI47f/ESyZV6DFglHcBSzZyxZhWttUTuN9V
	1rXWr6WV5kYe+2A=
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=-105.6 required=5.0 tests=AWL,BAYES_00,GOOD_FROM_CORINNA_CYGWIN,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 spammy=
X-HELO:	mout.kundenserver.de
Date:	Mon, 29 Jul 2019 15:48:50 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: Regression (last snapshot)
Message-ID:	<20190729134850.GP11632@calimero.vinschen.de>
Reply-To:	cygwin AT cygwin DOT com
Mail-Followup-To:	cygwin AT cygwin DOT com
References:	<20190722152016 DOT GE21169 AT calimero DOT vinschen DOT de> <20190722155340 DOT GF21169 AT calimero DOT vinschen DOT de> <20190722164509 DOT GG21169 AT calimero DOT vinschen DOT de> <eb8007691b20df0eb8032ca3d2fa445f AT smtp-cloud8 DOT xs4all DOT net> <b3b04db5-7f03-8281-f376-6cd10207ec01 AT cornell DOT edu> <4b59209a91e8384ec000e2724696791c AT smtp-cloud7 DOT xs4all DOT net> <935d8ce5-fd5c-3010-4664-bb2dc9b7ca2f AT cornell DOT edu> <20190729084552 DOT GL11632 AT calimero DOT vinschen DOT de> <eea273ca-f190-c91a-7892-9407bfcf4326 AT cornell DOT edu> <0166ad54-5417-054c-b4e3-b2a97cad8ad0 AT cornell DOT edu>
MIME-Version:	1.0
In-Reply-To:	<0166ad54-5417-054c-b4e3-b2a97cad8ad0@cornell.edu>
User-Agent:	Mutt/1.11.3 (2019-02-01)

--yklP1rR72f9kjNtc
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable

On Jul 29 13:35, Ken Brown wrote:
> On 7/29/2019 9:18 AM, Ken Brown wrote:
> > On 7/29/2019 4:45 AM, Corinna Vinschen wrote:
> >>    Did you try to reproduce this under
> >> strace?
> >=20
> > Yes, but there I get an error (even under mintty) for a different reaso=
n:
> >=20
> > $ strace -o trace.out ls -lL <(grep bash .bashrc)
> > ls: cannot access '/dev/fd/63': No such file or directory
> >=20
> > The strace output shows a call to fhandler_process::exists on /proc/450=
36/fd/63;
> > here 45036 is the PID of 'ls'.  And then I see an EBADF error.  But I t=
hink
> > what's happening here might be that bash is parsing '<(grep bash .bashr=
c)' too
> > soon, so that '/dev/fd/63' isn't related to the 'ls' command.
> >=20
> > By the way, I've just tried a different experiment, in which I simplify=
 the ls
> > command to 'ls <(grep bash .bashrc)'.  When I run this under xterm, I g=
et the
> > broken pipe error 98% of the time or more.  But it's fine under mintty.
>=20
> I think I may have more-or-less figured out what's going on.  The "broken=
 pipe"=20
> error simply means that ls has exited before grep has finished writing.  =
So grep=20
> is writing to a pipe that has no readers.  If I replace 'ls' by 'cat', I =
don't=20
> get any errors.

Yeah, but it's mainly because this got started wrongly.  bash needs to run
under strace as well, otherwise you don't have the connection to the process
actually creating the fifo.  My previous reply wasn't very clear on that,
sorry.


Corinna

--=20
Corinna Vinschen
Cygwin Maintainer

--yklP1rR72f9kjNtc
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----

iQIzBAEBCAAdFiEEoVYPmneWZnwT6kwF9TYGna5ET6AFAl0++UIACgkQ9TYGna5E
T6D4wg/9EmjAR+BqeyumRudW55WcQhrl1RdopPD8/I72d9VQS+3Jd9MLdrj7EhES
rv9VrJ0ASxr2h6t+fpiQUmTEe7IpQKkHYLCBSLdPbnE0LnhCxjX+2UjFfGbNx8ET
wquQs2tNZcxcvoWjJHqL1JUu9NqATeUB8lSaXy+GwZp4KZgkyt5Pmy5FuSOqnHGQ
Ay0HWusns/6i28KnTFdivaRRibW40Dt7mEoHoyFaohPJceSywdEfNkmammpQdPYR
SzX63ZDmqLdL9D24sJy6BCwcgvA75W/2ysUv6PulmGYUn6gDMhvVgidmOHwuYjDW
WI3v2ig8UlM/MGkMlp1oW2JQfhch0BHR+UnOIkYDI+/2cssowAUcJU3HL2Al69qf
efqHSu7U3e7Pmb8sPrtb35CaQVjOdXb6+BDGqlWUiyFIgk/T9/mGmfm1PKk6ZsX2
qHU+Uq5kcgqgtvbCydioTaax+T5EuNtpDzXSZrDsuZQR2LMXF9S38WKU8XC5ZYbX
oTrwGiiSYRD9iBRzK+SJea+UuE0TjX0HOnhxJanqte1xNFr1A/2xg6JbwH/x76j5
GJ9ey2tlPjGao5ay0bLEulbZzQGhZySYtnp26MzreQtggCKUwOaZWecLjxq5pTm4
9t6umBTohqUFEd5Tf15H7qh+X8Fe+SkN6Yr0d5q1OjqbPL0FzCQ=
=qtVM
-----END PGP SIGNATURE-----

--yklP1rR72f9kjNtc--

- Raw text -