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:from:to:subject:date:message-id:references
	:in-reply-to:content-type:content-id:content-transfer-encoding
	:mime-version; q=dns; s=default; b=fqBEEecB83GoiyNuUfNcm2p+WVU+f
	80o8Etp4DoEaGFnTZpqf9Pmt0qylDLgSlctJ003rWc5XxnHqQfGdHQUjsvWUJG+C
	AsLAbIqILUQRsn0S8e5Mw2TJlVlPeoMhzGgBo9IYsiTmBFtPVOK6O6UkB/iLQtO2
	rp9mjHWB80IvTE=
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:from:to:subject:date:message-id:references
	:in-reply-to:content-type:content-id:content-transfer-encoding
	:mime-version; s=default; bh=2I08kd5zo56f+jwx6pKgcdLT6u8=; b=gWf
	dr5yqubyQ2XvL1LA1/RcJcY16aZrsuJMQHnwqL4X9XsqSSUny63dSjHfTragSfxi
	6DXH8BlwqJoCeWy845JecejoIhxgbbjHD9ooHJizey2dDYlKKHnzhzxBd7yC3TMB
	ctmEKi3F4Rq/90candwcxNvwTF8I/p9sGRmqp6Go=
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=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE,SPF_HELO_PASS,SPF_PASS autolearn=ham version=3.3.1 spammy=
X-HELO:	NAM12-MW2-obe.outbound.protection.outlook.com
ARC-Seal:	i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=chRvdSBymWNXoLqBUsZ/iXDx+8s4Rv2kH23c608AmoAWpO7MOO5rLJe3Il3JAHP0JbKR/2tqsM0gW72gLjW4f1A/aQ9Gp6KqgpebLnmWh40nFq4xg4xq2IQ/xt9DsMUTl616jHSWPJqcaxE1EHrOwMJAIKqXjjyhp5klkpf94iQfOY2lsXdTCsTU7uSvfZf1+TSHxb4MVgDU4fEmCzD1HHjjheoJWy7kjudQ1xldevkQDlulko8D5167XdVFc8lKQJUs6e4hYvH5uWzYVxl3KflowiTZPInqZSfjK5OTdlV003CwGD9nofVL8Rtk+yLox3KQuvTwmQ67Eok8K1TSMA==
ARC-Message-Signature:	i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Ieh88CPr/vkxdMRWtXbP/dn7A6Xs3OXPGUlyaUx9f4c=; b=KLjOXE7UmqKsWlJJTA4vZQyeTig3gNxlysHPD80p4RMW2I08Pjzm26SGBhcrzEFT22tl0u6AdrjB8I2OC0CaNRi0pZe390utRmJyM6f+bPPfb/1K2RhpVy0kgFiqtCOkxdMChOm5uU+Ef9bfsOhQaLFY08ns9fsBMulrZVcrLtdQcdLr8JtJdDeHaC/D60NwVyapURRF3XofokNj+y5ZLWibv+J5q8fj7MCv5cor4P0JU3UV+elwhaUQTnSH+VsEg/LmuEd1hnzBOQVWyNFVzki9gxvVfGHDELVzg+da+9lX4Ipo1cebMYVxQpfudIYL8IWKPjq3a1l3uq2th4gvSA==
ARC-Authentication-Results:	i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=cornell.edu; dmarc=pass action=none header.from=cornell.edu; dkim=pass header.d=cornell.edu; arc=none
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=cornell.edu; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Ieh88CPr/vkxdMRWtXbP/dn7A6Xs3OXPGUlyaUx9f4c=; b=SiBwt5393ufLUfrd7CKMgGpPnAFmuHtNzX38Fq2152PIgFajdCrdfZZO7or8+siwihs33Rr2Ry4QdO8zhOEDFlbAdhfKS+Ycd0eFgYHHzjaNBANwBXw2eriQo4zASFAQJIeGaca3jWrGfNOIzbzJR/rrsYfuyH7Q37tc+n5zJjI=
From:	Ken Brown <kbrown AT cornell DOT edu>
To:	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject:	Re: MC no longer working with cygwin 3.1.x
Date:	Wed, 18 Dec 2019 23:09:03 +0000
Message-ID:	<1f5d0151-51c4-bd89-4fa9-137b88a543c8@cornell.edu>
References:	<DB8PR01MB5996973955794728D12078E6BC530 AT DB8PR01MB5996 DOT eurprd01 DOT prod DOT exchangelabs DOT com> <97c8a719-73b9-e0ec-9651-97c2c684a086 AT gmail DOT com> <20191218193205 DOT GP10310 AT calimero DOT vinschen DOT de> <c3809f52-1842-83d6-6692-53f6caec3491 AT cornell DOT edu> <e79cd247-c573-3c27-6636-c6d9a32447a4 AT towo DOT net>
In-Reply-To:	<e79cd247-c573-3c27-6636-c6d9a32447a4@towo.net>
user-agent:	Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1
authentication-results:	spf=none (sender IP is ) smtp.mailfrom=kbrown AT cornell DOT edu;
x-ms-oob-tlc-oobclassifiers:	OLM:4303;
received-spf:	None (protection.outlook.com: cornell.edu does not designate permitted sender hosts)
x-ms-exchange-senderadcheck:	1
x-ms-exchange-transport-forked:	True
MIME-Version:	1.0
X-MS-Exchange-CrossTenant-mailboxtype:	HOSTED
X-MS-Exchange-CrossTenant-userprincipalname:	HvDq46q9DQoIGpJSpUh40MgRqqghxAlFV5ElHI5hMGymh5xtzn+uDItLUenU+g0UavVrrVI04OTKGD5uxztumA==
X-IsSubscribed:	yes
X-MIME-Autoconverted:	from quoted-printable to 8bit by delorie.com id xBIN9eHN019804

On 12/18/2019 5:55 PM, Thomas Wolff wrote:
> 
> 
> Am 18.12.2019 um 22:14 schrieb Ken Brown:
>> On 12/18/2019 2:32 PM, Corinna Vinschen wrote:
>>> On Dec 18 17:23, Marco Atzeri wrote:
>>>> Am 18.12.2019 um 15:42 schrieb Laurent R:
>>>>> Dear all,
>>>>>
>>>>> After the update to cygwin-3.1.1, mc (aka Midnight Commander) no longer 
>>>>> starts. It goes into an infinite loop, if I go back to cygwin-3.0.7, mc 
>>>>> works perfectly.
>>>>>
>>>>> I tested with cygwin-3.1.0, same problem.
>>>>>
>>>>> The MC version is 4.8.23 and the operating system is Windows 10 Pro x64 1903.
>>>>>
>>>>> Regards.
>>>>>
>>>> confirmed
>>>>
>>>> there must be a race somewhere as running /usr/bin/mc.exe from strace
>>>> works fine.
>>> But that's not the only problem running mc AFAICS.  I'm seeing an
>>> error message in the background:
>>>
>>> Cannot open named pipe /tmp/mc-corinna/mc.pipe.384
>>>     
>>> /cygdrive/d/cyg_pub/devel/mc/mc-4.8.23-1.x86_64/src/mc-4.8.23/src/subshell/common.c: 
>>> open: Permission denied
>>>
>>> It looks like there's another problem, this time with the new FIFO
>>> code.
>>>
>>> Ken, care to take a look?
>> I've just looked at the mc source code, and it seems that (under tcsh only), mc
>> creates a fifo and tries to open it twice as O_RDWR.  This is not supported on
>> Cygwin, so the second attempt fails.
>>
>> Here's the relevant code from src/subshell/common.c:
>>
>>           if (mc_global.shell->type == SHELL_TCSH)
>>           {
>>               g_snprintf (tcsh_fifo, sizeof (tcsh_fifo), "%s/mc.pipe.%d",
>>                           mc_tmpdir (), (int) getpid ());
>>               if (mkfifo (tcsh_fifo, 0600) == -1)
>>               [...]
>>               /* Opening the FIFO as O_RDONLY or O_WRONLY causes deadlock */
>>
>>               if ((subshell_pipe[READ] = open (tcsh_fifo, O_RDWR)) == -1
>>                   || (subshell_pipe[WRITE] = open (tcsh_fifo, O_RDWR)) == -1)
>>               {
>>                   fprintf (stderr, _("Cannot open named pipe %s\n"), tcsh_fifo);
>>                   perror (__FILE__ ": open");
>>                   mc_global.tty.use_subshell = FALSE;
>>                   [...]
>>
>> Under bash, zsh, and some other shells, mc uses ordinary pipes rather than
>> FIFOs.  I have no idea why tcsh is treated differently.
>>
>> Until someone[*] gets around to making it possible to open a FIFO twice for
>> reading, I don't think there's anything we can do about it.  I also don't know
>> how important this is for mc.  I don't use tcsh or mc, so I can't judge.
> I've reproduced mc to fail, from bash, in cygwin 3.1.0 and 3.1.1, Windows 1809 
> and 1903.

That's not related to what I've been talking about, which is the error message 
"Cannot open named pipe /tmp/mc-corinna/mc.pipe.384" that Corinna reported.  The 
failure you're talking about occurs in all shells and has already been fixed by 
Takashi.  I imagine Corinna will release 3.1.2 with the fix very soon.

Ken

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple

- Raw text -