From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from NAM12-DM6-obe.outbound.protection.outlook.com (mail-dm6nam12on2096.outbound.protection.outlook.com [40.107.243.96]) by sourceware.org (Postfix) with ESMTPS id D46F6384A026 for ; Thu, 24 Dec 2020 22:56:14 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org D46F6384A026 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=NDEeBzSfjSuad1oaJ1uHyBVXrmTvkBuBvFinLwm8S7cAIFDlyRSdDIKVcIUI10xn1g7wfu85JteBt9DEk159Xm4QCDW8/Rs5QiRAbbYeguAYqpo4vt9ZfpwP317zFUc775n31iJ7OVdY24RjwGqKQPEB91R0iUeMk+aPsSsLe7aYjpOaGn5RI3LXmQeWIigY0GI4KmbVdXPBeCZOonZemJyLEj3WhfTmOs04cJdEMctGIUX7XfQf00wB+gzo6yGUJkh9MA2BQn9gD5mS9A6uldZB3hJjBkjuMbxAO3RLXK3pnzv1CZgEtvsvXJjtyEmifmViHHHjjtOBPZ3CiIgv6A== 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=9Jm79uAuPZZxuVqrFiFveRZ+V3ufPQ+SQvR/jUzlYKs=; b=dZ2KscENrON5ZnjvVRNSl8Jn2epv+wQGg4flX4vkPoG6S6pzukpb2/VUQ8JtQaqT3xNm3Ir82LiP8kCucdg76C2HrUsUcfQqtfy7d1vmKj1KezfDdZvG2HXW+inWdQDjZue6A/fTPc51RRQoWBczXFfrHAzZ19b3RtWq0DlLyrYnuCjeZngiPunF9juE4Ou+7PcrvpItTOQCFKz+4GedUioU0CBGHcTshPbY4ZaW4etlreExdI0Jtg8lZJM5rqB/FyNKHiVGQbRG/uGvW2UTG/rzXghGfYTQTI93RAlT6xOwtj4ndfPeJmm5IjwyASDT0qZfzP1Zkrct5VnJ03Xd0Q== 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 Received: from MN2PR04MB6176.namprd04.prod.outlook.com (2603:10b6:208:e3::13) by MN2PR04MB5632.namprd04.prod.outlook.com (2603:10b6:208:a1::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3700.27; Thu, 24 Dec 2020 22:56:11 +0000 Received: from MN2PR04MB6176.namprd04.prod.outlook.com ([fe80::113e:c874:1207:eca8]) by MN2PR04MB6176.namprd04.prod.outlook.com ([fe80::113e:c874:1207:eca8%6]) with mapi id 15.20.3700.026; Thu, 24 Dec 2020 22:56:11 +0000 Subject: Re: chmod issue on 3.1.7. To: cygwin@cygwin.com References: <7cb8ee6c7e9a36a3c1ee73def342bcb6@mail.kylheku.com> From: Ken Brown Message-ID: <4fe8b717-ada1-16b5-f739-7d43b2a4d56c@cornell.edu> Date: Thu, 24 Dec 2020 17:56:10 -0500 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.5.1 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-Originating-IP: [65.112.130.200] X-ClientProxiedBy: BN6PR19CA0107.namprd19.prod.outlook.com (2603:10b6:404:a0::21) To MN2PR04MB6176.namprd04.prod.outlook.com (2603:10b6:208:e3::13) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [10.13.22.7] (65.112.130.200) by BN6PR19CA0107.namprd19.prod.outlook.com (2603:10b6:404:a0::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3700.27 via Frontend Transport; Thu, 24 Dec 2020 22:56:10 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: fa0cbbfa-676d-4184-f6e5-08d8a85f1b99 X-MS-TrafficTypeDiagnostic: MN2PR04MB5632: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:5236; 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DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData: =?Windows-1252?Q?Iwxs6ssYVH7MgfrDfYzaaQ/2sY+MjnTTHG/puHGp6sBxA3C9QCJzL4YV?= =?Windows-1252?Q?DU1fTlTWwiGbxGCdXK2zKwFJ85h/OgFo3fgYlDXU2bGeUlY9yZomLF6Q?= =?Windows-1252?Q?tG1CGbKeud1myZW9CQRRDOGzBsmdsP5Fkb9OHIqGMOifhH3yrywJbMmv?= =?Windows-1252?Q?0tdHjBN/ucVDTRm/vLlHVrdxB9j85bFICL1AfB/+AVqF8k8RYzYbaNaa?= =?Windows-1252?Q?dshZYzRa8s0IWNVELo2WoaVmLVCUdlS/movWohVzUyAoFH92ZGTXH5Q7?= =?Windows-1252?Q?wJIGnmgr0vadDJKqNJFmfZSqz9hzEWC5Kay1OIHnTQj0JN6BnRfkmwWX?= =?Windows-1252?Q?93hcQMuROjPx4R1wll5BwNQb5zr8O803Nk6iOHRq4DIfYAl+530M8Hpp?= =?Windows-1252?Q?ksFsowjruNpAQ2zmyeodoSyd7N2koiwupjsn/DkVcjylE965dik6pJEE?= =?Windows-1252?Q?sES/g6MRkGzmPvRLZrEVAB2jkViJV2h8Dq1U3wp8OgMV97UXs/9m4El4?= =?Windows-1252?Q?xXABA2g2tn+uYB1FXq+zquuOrda9eVY6KSEYdzFJ2U4oWkIJeMrS8Rwc?= =?Windows-1252?Q?7mprC2e8zJvvhRQvTScAIhDGW7SIJRIfWzBupaQ3HWYm6FcwcZEog2bC?= =?Windows-1252?Q?jS18NBTZBs9ft1qSZ3XSqej81j5mxvsG9OPds1GhgH0W18whwS3hIH5h?= =?Windows-1252?Q?Cvo0l/6Xcd5IvF760Ot5VD9E41S0LmQFVxi0FySKHC8zfmS4fzpQSnfI?= =?Windows-1252?Q?ZXlLf+sfAxkBmCncmSUyHHs5wCL+ooXsIJZboecgfA9jMY7dkFZQE+fB?= =?Windows-1252?Q?N0D5+ztQVbzn387oC7Fllyn3jfhHJwsUoN8BRXQ+aiiqOKTF/EJKuoEz?= =?Windows-1252?Q?ZVB5qgxTk4qRBoj1Nrx/eml7i/ipgeuNLG6ovNjUsPPu+eOrUovIGkT8?= =?Windows-1252?Q?2M22NAz+QrLA3MWUpMGAfC2gCxB/o9FFa5GrQMMYOcYrIwEUnjVfdYAl?= =?Windows-1252?Q?6D+BPSJkTUSEWowWx+H93Smqa1VIeoS4GzB16PHqP2fuQnVHDuvJP3lt?= =?Windows-1252?Q?8f0z9bFNRmofdqtn?= X-OriginatorOrg: cornell.edu X-MS-Exchange-CrossTenant-AuthSource: MN2PR04MB6176.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Dec 2020 22:56:11.0650 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 5d7e4366-1b9b-45cf-8e79-b14b27df46e1 X-MS-Exchange-CrossTenant-Network-Message-Id: fa0cbbfa-676d-4184-f6e5-08d8a85f1b99 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: CDjIsIStdIOOKovqDb6yCyx5vg9NdSli4L6t/C2jV7oq5zApvFbUmXRJ846q4qckwyWfT7J1iLemxjLmEGTlUw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR04MB5632 X-Spam-Status: No, score=-0.5 required=5.0 tests=BAYES_00, BODY_8BITS, DKIM_INVALID, DKIM_SIGNED, KAM_DMARC_STATUS, MSGID_FROM_MTA_HEADER, NICE_REPLY_A, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, 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@cygwin.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: General Cygwin discussions and problem reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 Dec 2020 22:56:16 -0000 On 12/24/2020 4:13 PM, Kaz Kylheku (Cygwin) via Cygwin wrote: > On 2020-10-10 09:32, Kaz Kylheku (Cygwin) via Cygwin wrote: >> Hi all, >> >> Running this Cygwin on a Windows 10 system: >> >>   0:DESKTOP-K8055OB:~$ uname -a >>   CYGWIN_NT-10.0-WOW DESKTOP-K8055OB 3.1.7(0.340/5/3) 2020-08-22 19:03 >> i686 Cygwi >> >> When a file is created, and permissions set as follows: >> >>   0:DESKTOP-K8055OB:~$ touch tempfile >>   0:DESKTOP-K8055OB:~$ chmod 03777 tempfile >>   0:DESKTOP-K8055OB:~$ ls -l tempfile >>   -rwsrwsrwt 1 kaz kaz 0 Oct 10 08:59 tempfile >> >> Then "chmod u=" is not able to clear the owner's permissions to nothing: >> >>   0:DESKTOP-K8055OB:~$ chmod u= tempfile >>   0:DESKTOP-K8055OB:~$ ls -l tempfile >>   -rwxrwsrwt 1 kaz kaz 0 Oct 10 08:59 tempfile >> >> As you can see, it has no effect. The expected value is ----rwsrwt. >> >> I tried both with 64 and 32 bit Cygwin: same deal. >> >> This is not a problem with the chmod utility.  I ran into this as a failing >> test case against a chmod library function in a programming language. >> >> http://www.kylheku.com/cgit/txr/tree/tests/018/chmod.tl >> >> The test cases pass until the "u=", which fails in the same way. >> This does not use the chmod utility. >> >> It's an issue with the chmod system call. >> >> This used to work on my older Cygwin installation, which was around 2.5. > > Anyone have a clue about this issue? > > $ icacls tempfile > tempfile NULL SID:(DENY)(Rc,S,RD,WD) >          BLACKBOX\kaz:(F) >          BLACKBOX\kaz:(RX,W) >          Everyone:(RX,W) > > $ getfacl tempfile > # file: tempfile > # owner: kaz > # group: kaz > # flags: -st > user::rwx > group::rwx > other::rwx > > $ ls -l tempfile > -rwxrwsrwt 1 kaz kaz 0 Dec 24 13:09 tempfile > > $ chmod u= tempfile > $ ls -l tempfile > -rwxrwsrwt 1 kaz kaz 0 Dec 24 13:09 tempfile Could the problem be that the owner and group are the same? You can do that on unix, but I'm not sure the Windows security model allows it. For example, what happens when you remove permissions of the owner kaz while retaining the permissions of the group kaz? As far as Windows is concerned, you're talking about BLACKBOX\kaz in both cases, I think. Ken