X-Recipient:	archive-cygwin AT delorie DOT com
X-Original-To:	cygwin AT cygwin DOT com
Delivered-To:	cygwin AT cygwin DOT com
DMARC-Filter:	OpenDMARC Filter v1.3.2 sourceware.org E78AC384C003
Authentication-Results:	sourceware.org;
	dmarc=pass (p=none dis=none) header.from=yandex.ru
Authentication-Results:	sourceware.org;
	spf=pass smtp.mailfrom=anrdaemon AT yandex DOT ru
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex.ru; s=mail;
	t=1619017502; bh=ix7V5uPzwWZS3cXxfVKmAI9lrdWiYkmwWsvXyLbFK94=;
	h=In-Reply-To:Subject:To:From:Message-ID:References:Date:Reply-To;
	b=b0sAzbymQ+GeTsVYloMPnTTvjuRGMhvIS4EGTLfqewutiyeJlgEmPYe1BKbiCwUFP
	g41ol06tSOpjyWhqZpHvB3EVKr9MWXzkgsTh5VQdd9uI01PWEoDXvZ3tZAXxjVZD9s
	BV2NP/8qd37iEUferU6MsmL+hZKjV0sHdFilbLio=
Authentication-Results:	myt5-4fa6d87d1832.qloud-c.yandex.net;
	dkim=pass header.i=@yandex.ru
Date:	Wed, 21 Apr 2021 17:58:16 +0300
From:	Andrey Repin <anrdaemon AT yandex DOT ru>
X-Mailer:	The Bat! (v6.8.8) Home
X-Priority:	3 (Normal)
Message-ID:	<263534123.20210421175816@yandex.ru>
To:	Corinna Vinschen via Cygwin <cygwin AT cygwin DOT com>, cygwin AT cygwin DOT com
Subject:	Re: Cannot access system32 directory from 32 bit cygwin after the
	commit 456c3a46
In-Reply-To:	<YH/uPeBvTfxKdRxQ@calimero.vinschen.de>
References:	<20210421120457 DOT cd5b6e966288aa62eee1a013 AT nifty DOT ne DOT jp>
	<YH/uPeBvTfxKdRxQ AT calimero DOT vinschen DOT de>
MIME-Version:	1.0
X-Spam-Status:	No, score=0.3 required=5.0 tests=BAYES_00, DKIM_SIGNED,
	DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, KAM_NUMSUBJECT,
	KAM_THEBAT, NICE_REPLY_A, SPF_HELO_NONE, SPF_PASS,
	TXREP autolearn=no autolearn_force=no version=3.4.2
X-Spam-Checker-Version:	SpamAssassin 3.4.2 (2018-09-13) on
	server2.sourceware.org
X-BeenThere:	cygwin AT cygwin DOT com
X-Mailman-Version:	2.1.29
List-Id:	General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Unsubscribe:	<https://cygwin.com/mailman/options/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=unsubscribe>
List-Archive:	<https://cygwin.com/pipermail/cygwin/>
List-Post:	<mailto:cygwin AT cygwin DOT com>
List-Help:	<mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe:	<https://cygwin.com/mailman/listinfo/cygwin>,
	<mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
Reply-To:	cygwin AT cygwin DOT com
Errors-To:	cygwin-bounces AT cygwin DOT com
Sender:	"Cygwin" <cygwin-bounces AT cygwin DOT com>

Greetings, Corinna Vinschen via Cygwin!

> On Apr 21 12:04, Takashi Yano via Cygwin wrote:
>> Hi Corinna,
>> 
>> I noticed the problem that /cygdrive/c/Windows/System32 directory
>> can be no longer accessed from 32 bit cygwin (WOW64) after the
>> commit:

> The problem here is the File System Redirector,
> https://docs.microsoft.com/en-us/windows/win32/winprog64/file-system-redirector

> This thing is really a problem because it break every, otherwise
> sane assumption.  Hmm, bummer.  I need some time to think about
> a solution here.

As far as I'm aware, it can be disabled on application request.
I know at least one 32-bit application (Far Manager) that works through
redirector, but it might not be as easy for a library.

>> 
>> commit 456c3a46386f38887407603b2c64b7f63a4871c5
>> Author: Corinna Vinschen <corinna AT vinschen DOT de>
>> Date:   Mon Apr 19 14:49:14 2021 +0200
>> 
>>     Cygwin: path_conv: Try to handle native symlinks more sanely
>> 
>>     For local paths, add a check if the inner path components contain native
>>     symlinks or junctions.  Compare the incoming path with the path returned
>>     by NtQueryInformationFile(FileNameInformation).  If they differ, there
>>     must be at least one native symlink or junction in the path.  If so,
>>     treat the currently evaluated file as non-existant.  This forces
>>     path_conv::check to backtrack inner path components until we eliminated
>>     all native symlinks or junctions and have a normalized path.
>> 
>>     Signed-off-by: Corinna Vinschen <corinna AT vinschen DOT de>
>> 
>> Reverting this commit resolves the issue.
>> 
>> 64 bit cygwin does not seem to be affected. Could you please
>> have a look?


-- 
With best regards,
Andrey Repin
Wednesday, April 21, 2021 17:54:23

Sorry for my terrible english...


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

- Raw text -