X-Recipient:	archive-cygwin AT delorie DOT com
DKIM-Filter:	OpenDKIM Filter v2.11.0 sourceware.org 3013C385481B
DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
	s=default; t=1604853581;
	bh=pN1fLEoroVd9n1D24m59v78rDY/RtxS6/lfAjVXaQ7g=;
	h=Subject:To:References:Date:In-Reply-To:List-Id:List-Unsubscribe:
	List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:
	From;
	b=UBmX6xXdxO4lfVufBVOa6B9yn7FdGvYuBe+3gc2/RaB0IJxsNRqbP8ILsbdTyF+Vy
	YFq3hjl5MPQROqkzhC9Eeu4EWmQ3jlYh5nX0iUQTXUn4ts4cPkrqrLxtpjXQcd9Qxc
	4hF4IQL0Lim6VczSMxBDq0b/mBzpRlsGaTPzsLd0=
X-Original-To:	cygwin AT cygwin DOT com
Delivered-To:	cygwin AT cygwin DOT com
DMARC-Filter:	OpenDMARC Filter v1.3.2 sourceware.org 76F343857C4C
ARC-Seal:	i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none;
	b=OfpeB8JVl3PX6KpetDBFdIwdV9NDLcYIoGxVjnxhb1yJcjbSMtoIvAjFxK33EjJFca2s/pXCKsL+XwJFn5lQZX4dYh8MfPUcq8b4lPC7qE9DOU2iUuEDFP4un3cbk40Vm0wls614psyIN02xqNy8vZwuFUS0ISxVLjYM+0+ItC4tIDTWdXCcaT9w97J4oEic0I3JtLnJaKDdTM/IeVe4TkdZH3lVUYAet2VQ2SEUZsRBjlufM/UbD4MEZarxqyBj0e+pk+IKWMjSHvSPnd+fSA55HFA/uUctj9jd7R9QG3POE2pfkhQdoZW/y1Hx2aGeh8DvRg5fkhA5jsSXDLVjfA==
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=lKXiAHf+pAcYP+eua5kOpJquT5cc19PNZUKJvU5z6Ic=;
	b=G4SpOTVTlMijWrXwcKUNEaRS1ibgRIHTaokB6LIAyvTIZKB2laWZqo+RqP5nfqLLRyQaheuC2VrpaFNQemBmQGe1lcRRbvImEYjCHz4iqKFr7FkvcGqmgaVd3kZ+KcNFhX6cOo/AZIVDvAQXiGwbuEj1zfi8gAsKtRn6DwR2N5q0NDkc6sBWWsmvUcAjuRPeLYqZpYOEWyUFftfe7+P//JWFku3zl7LVgRtr8wQRgKBlwdj4uLmjjyRwS7cUuHCN1aWQllK5m9lLnMLw5JaemkCLOE2aaqGLo1dY1yDJQJpGQ+rb8tEXveTlFfvg+eAdODpyJbPI5FczFgJNa/hTqQ==
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
Subject:	Re: Strange paths in NTFS reparse points created by Cygwin Setup for
	e.g. TTF fonts
To:	Michael Soegtrop <MSoegtrop AT yahoo DOT de>, cygwin AT cygwin DOT com,
	L A Walsh <cygwin AT tlinx DOT org>
References:	<245e2446-8c1e-cbaa-a4ad-215d7e766274 DOT ref AT yahoo DOT de>
	<245e2446-8c1e-cbaa-a4ad-215d7e766274 AT yahoo DOT de>
	<bb3e651e-bedf-5c17-f3e3-48d8cc98b6fd AT cornell DOT edu>
	<addcfc69-6844-845d-3bae-5aab8d752b9d AT yahoo DOT de>
Message-ID:	<eed58fd6-2363-5979-2588-c6e6cf9fc372@cornell.edu>
Date:	Sun, 8 Nov 2020 11:38:50 -0500
User-Agent:	Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101
	Thunderbird/78.4.1
In-Reply-To:	<addcfc69-6844-845d-3bae-5aab8d752b9d@yahoo.de>
X-Originating-IP:	[68.175.129.7]
X-ClientProxiedBy:	CH2PR18CA0018.namprd18.prod.outlook.com
	(2603:10b6:610:4f::28) To MN2PR04MB6176.namprd04.prod.outlook.com
	(2603:10b6:208:e3::13)
MIME-Version:	1.0
X-MS-Exchange-MessageSentRepresentingType:	1
X-MS-PublicTrafficType:	Email
X-MS-Office365-Filtering-Correlation-Id:	35ecd438-84c5-4393-6be3-08d88404e00b
X-MS-TrafficTypeDiagnostic:	MN2PR04MB5870:
X-Microsoft-Antispam-PRVS:	<MN2PR04MB587062F45DAA69ACD3B43572D8EB0 AT MN2PR04MB5870 DOT namprd04 DOT prod DOT outlook DOT com>
X-MS-Oob-TLC-OOBClassifiers:	OLM:8273;
X-MS-Exchange-SenderADCheck:	1
X-Microsoft-Antispam:	BCL:0;
X-Microsoft-Antispam-Message-Info:	9WXnK0a4RjZ7x9+TwYnTCjDHFOjVYsaU8Pli/Uh5VUkAxx+V9qdfH9HyyFHGsZA6i2gbb9Hk6Ni9kPXCbvpcAgiwYdUWl5cYk1iC65CsWhpsGVamvPD/89/0XBMiV6Tsk8Vi6itxGCoxQfJFquIqyj13Isi+cKd1kxTtCxij0VbyvXH8ilmYg7xaEO1HQND30KO2BOYq3dgOs0m4p6EEk7Vu02KLfpo1oc0GLUa3F3V2w52puDfJXIpEhwddXHX5WzxfaFkUKDp6xzCeWXz+p/Nm5saRDqc3y9fKvbK+T6nxwV2KSFAKEzBibRLxkQ1cybaKqqlF+5/Ovwbes2J1OKvuuQkcRZ5fd4r/SMX6ECNvYBOifaJT52nM0kWiZlsy
X-Forefront-Antispam-Report:	CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:;
	IPV:NLI; SFV:NSPM; H:MN2PR04MB6176.namprd04.prod.outlook.com; PTR:; CAT:NONE;
	SFS:(4636009)(366004)(136003)(396003)(39860400002)(346002)(376002)(8936002)(75432002)(956004)(6666004)(16576012)(316002)(786003)(110136005)(16526019)(2616005)(8676002)(53546011)(86362001)(36756003)(186003)(83380400001)(66476007)(66556008)(31696002)(52116002)(6486002)(45080400002)(478600001)(2906002)(31686004)(26005)(66946007)(5660300002)(43740500002);
	DIR:OUT; SFP:1102;
X-MS-Exchange-AntiSpam-MessageData:	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
X-OriginatorOrg:	cornell.edu
X-MS-Exchange-CrossTenant-Network-Message-Id:	35ecd438-84c5-4393-6be3-08d88404e00b
X-MS-Exchange-CrossTenant-AuthSource:	MN2PR04MB6176.namprd04.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs:	Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime:	08 Nov 2020 16:39:34.9863 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader:	Hosted
X-MS-Exchange-CrossTenant-Id:	5d7e4366-1b9b-45cf-8e79-b14b27df46e1
X-MS-Exchange-CrossTenant-MailboxType:	HOSTED
X-MS-Exchange-CrossTenant-UserPrincipalName:	/6mjcsl8F2co0eMjTUPqPk5h3ej1ZVzYVZaP8VqyERYHf+yeon7CSkLFgjeeVdnzehm5HDlq2INQQrM2fFTNOA==
X-MS-Exchange-Transport-CrossTenantHeadersStamped:	MN2PR04MB5870
X-Spam-Status:	No, score=-4.1 required=5.0 tests=BAYES_00, DKIM_SIGNED,
	DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, JMQ_SPF_NEUTRAL,
	MSGID_FROM_MTA_HEADER, NICE_REPLY_A, SPF_HELO_PASS, 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>
From:	Ken Brown via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Ken Brown <kbrown AT cornell DOT edu>
Errors-To:	cygwin-bounces AT cygwin DOT com
Sender:	"Cygwin" <cygwin-bounces AT cygwin DOT com>

On 11/8/2020 9:40 AM, Michael Soegtrop wrote:
> Why shouldn't I be able to remove symlinks with rm -rf from within a cygwin? As 
> far as I understand the standard behavior of "rm" is to remove the symlink and 
> not its target. What I do when I remove a cygwin installation in our CI is an 
> "rm -rf" from a different cygwin installation. As I said in most cases this 
> works but rarely it doesn't.
[...]
> I understand that the contents / path of the symlink is as expected, so I am 
> looking out for other oddities which could explain this behavior.

I've seen this behavior only in the following situation.  Suppose you create a 
symlink in one Cygwin installation that uses WSL symlinks.  Then you try to 
delete it from a different Cygwin installation with version < 3.1.5 (which is 
when WSL symlinks were first supported).  This will fail, because the older 
Cygwin installation will see a reparse point of a type that it doesn't recognize.

 From what you say, it sounds like this doesn't apply to your situation, so I'm 
at a loss to explain it.

Do you get any error message when you're unable to delete a symlink in one 
Cygwin installation from another?  If not, you could try running 'rm <cygwin 
root>/usr/share/fonts/microsoft/wingding.ttf' under strace to see if that give 
you any clues.  You could also try 'file', 'ls -l', 'stat', etc., to see if 
Cygwin is correctly recognizing the file as a symlink.

For example, I have a Cygwin installation in C:\cygwin64test.  From a different 
Cygwin installation in which C: is mounted on /c, I see the following:

$ file /c/cygwin64test/usr/share/fonts/microsoft/wingding.ttf
/c/cygwin64test/usr/share/fonts/microsoft/wingding.ttf: symbolic link to 
/c/Windows/Fonts/wingding.ttf

Now I remove that symlink under strace:

$ strace -o strace.out rm /c/cygwin64test/usr/share/fonts/microsoft/wingding.ttf

In the file strace.out I see

    57   26112 [main] rm 39456 symlink_info::check: 0x0 = NtCreateFile 
(\??\C:\cygwin64test\usr\share\fonts\microsoft\wingding.ttf)
   100   26212 [main] rm 39456 symlink_info::check: 29 = 
symlink.check(C:\cygwin64test\usr\share\fonts\microsoft\wingding.ttf, 
0xFFFFB680) (mount_flags 0x4008, path_flags 0x10)
    26   26238 [main] rm 39456 path_conv::check: 
this->path(C:\cygwin64test\usr\share\fonts\microsoft\wingding.ttf), has_acls(1)
    25   26263 [main] rm 39456 _unlink_nt: Trying to delete 
\??\C:\cygwin64test\usr\share\fonts\microsoft\wingding.ttf, isdir = 0
   218   26481 [main] rm 39456 _unlink_nt: 
\??\C:\cygwin64test\usr\share\fonts\microsoft\wingding.ttf, return status = 0x0
    33   26514 [main] rm 39456 unlink: 0 = 
unlink(/c/cygwin64test/usr/share/fonts/microsoft/wingding.ttf)

In your case I would expect to see some errors reported when you are unable to 
remove the symlink.

Ken
--
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 -