From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from NAM11-BN8-obe.outbound.protection.outlook.com (mail-bn8nam11on2094.outbound.protection.outlook.com [40.107.236.94]) by sourceware.org (Postfix) with ESMTPS id 2E5843938C24 for ; Mon, 3 May 2021 13:58:39 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 2E5843938C24 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=DV3nrPOdnbTie+tW32CiD8gLWrW0f4Lx8pDtl/QFzwsq2ItKGD5epUeDKKZ44xrWVMtB7+uOcXgIAIZ8JNy9V0Lq13I/61zsivtiW7iNzq50fisDm6QmNZTU0ppYhlkIAfw6WJXtb0lTlrTQFt8qApcVrGWQjlIRZDJXs7bfPJFot4wDPRYmkLqXUOOPEkp0dcMpWbyQirikaMsdE+tSEx5haqwmIsPHBh6NyJSZJs6bEnn8VZrEfgdY4ATyhLYIxJl++k8dnFApvIv8dVdOWRXX8hYlpSciyVGSXLkS9FiVuw0qMUE4VJ6aA4beEt7mEGaEJULtT01wOvhVruHiwQ== 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=2yBN+C5aNVe6pHknd3mlNDdDM+RO7fyc3nMsfNsFcMc=; b=DUD1BpByJIb/0nVqZTGhaZRf7aGIp3NkdIACSFyy7GXY5FHFu6B16u5hl+caA2Jdd7f56p2gB3s4T5+N9W//ex69j6Vd4tK4jd5PojFhTQRy0bT9JHss8gOabBY5zSiIFU8drvWi6ve2mJgm7fvnDOMIAMtmNutN5l6aqcwrjYvKX/tChzw+vTjoMZ0NNAFQoj32k592uayHBu3EOiEyXZ/yODSfvsjG7A/0f+K9Ka8hIrAcd0wvYxxuR1w49k7Sxh8l6zotew/ZBAs+yKMVoOWPsQi+tx5QzNY27mvYcGD9oUtHNIQwF1/bz0G5SgIUcNMWlURoGqAqmVNaoKe4/w== 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 BN7PR04MB4388.namprd04.prod.outlook.com (2603:10b6:406:f8::19) by BN6PR04MB0244.namprd04.prod.outlook.com (2603:10b6:404:1d::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4065.23; Mon, 3 May 2021 13:58:38 +0000 Received: from BN7PR04MB4388.namprd04.prod.outlook.com ([fe80::59f8:fcc4:f07e:9a89]) by BN7PR04MB4388.namprd04.prod.outlook.com ([fe80::59f8:fcc4:f07e:9a89%4]) with mapi id 15.20.4065.039; Mon, 3 May 2021 13:58:38 +0000 Subject: Re: python > 3.5: Issue with unix domain sockets To: cygwin@cygwin.com References: <1620046759893.5340@bmw.de> From: Ken Brown Message-ID: <2cde4128-6a3d-7431-6608-a2184d23964a@cornell.edu> Date: Mon, 3 May 2021 09:58:36 -0400 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.10.0 In-Reply-To: <1620046759893.5340@bmw.de> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit X-Originating-IP: [24.194.34.31] X-ClientProxiedBy: BL1PR13CA0306.namprd13.prod.outlook.com (2603:10b6:208:2c1::11) To BN7PR04MB4388.namprd04.prod.outlook.com (2603:10b6:406:f8::19) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [192.168.0.18] (24.194.34.31) by BL1PR13CA0306.namprd13.prod.outlook.com (2603:10b6:208:2c1::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4108.8 via Frontend Transport; Mon, 3 May 2021 13:58:37 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 650e10a2-65e2-494a-23e1-08d90e3b8ce3 X-MS-TrafficTypeDiagnostic: BN6PR04MB0244: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8882; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:BN7PR04MB4388.namprd04.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(366004)(346002)(376002)(136003)(396003)(39860400002)(31696002)(86362001)(31686004)(8676002)(2616005)(38350700002)(38100700002)(75432002)(2906002)(6486002)(956004)(36756003)(26005)(53546011)(478600001)(316002)(66476007)(66556008)(52116002)(16526019)(66946007)(186003)(5660300002)(8936002)(6916009)(786003)(966005)(83380400001)(16576012)(45980500001)(43740500002); DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData: =?Windows-1252?Q?tNAJtUkFyjE9zeljlmhek2E7cr/fjEEvFpMY/6oikx5PPP8CIcW4aQjh?= =?Windows-1252?Q?amPS+UveRhsFCWPoX9d5nyAXKRgrOagP2NuKF2KnE7r2RixlIy8IBQAw?= =?Windows-1252?Q?pNenxt0bjUKd5QECuEjc8SpUeA5evA+PMldgyLLDCbuT5Z+I6mg+UG4B?= =?Windows-1252?Q?12UJ1GhBLWzfrH4Los8PL7TKmyNeklGhHiJQQDQmxAmSVAfgqeEoXmAv?= =?Windows-1252?Q?+kwTdlVztGhLyeJZv/wZqOx2ZndQLnvKtsUMSEB9L8Y4jWUofydigiFY?= =?Windows-1252?Q?5a35R3izrcPS7KQ4fgUGxPLi2+T3bZdmhQHocuG9FA7DV+5KXcaRtJcA?= =?Windows-1252?Q?/YE+YmzmU75E2EardxAvC50Yn3+kBnjAk2nvI+h/ITzi1DRzktYULzWf?= =?Windows-1252?Q?fDhiTVi8W/OwUyHusxBSTK1nzXD3ix/IaEmk2pNHKms9Yq8coSs+aT2j?= =?Windows-1252?Q?8GmYKip6o/gI0IUjUKVJcYalvpmoMLC7yp9oV9OB985C0ds6RVbzJwmw?= =?Windows-1252?Q?fsluP11YkTMtEzRMLVtWVw4hiiu9yQ+fTGbmJN6b0FxcTz3kfyiakmlj?= =?Windows-1252?Q?QC6TV+VHQHPU2Jtb4PSSB6vXKAsDQzgRiBaCEAQpKeqsr5ZhOoVCDIKj?= =?Windows-1252?Q?0qqASifIkVNemiJ9HKbqBp1iSTG6MWTKeVRJRRl9cM6kHbNDSeOWuRDL?= =?Windows-1252?Q?c+WicvYsUvr3KBs57jsy0S550sBhI1C3pPHoa66MTeJ69vYzjoARD15i?= =?Windows-1252?Q?ww+gWW2HpyzYeDB6LVC0Zkr7JQmKI7JC1IW8MHSjK2w+X6y73qOFxILM?= =?Windows-1252?Q?Ii76QJnD0UPYCeDfcx4Rq4uXkSoW3BXfsdA0Pj+7nqCTLzTMfor1dMGm?= =?Windows-1252?Q?G8HhER2vnOwjsL3zwgnDJ2mIUQtiOwPe23Sq/5ONt1unGt0xDj/jtSq7?= =?Windows-1252?Q?R0bbxDFKwNSc7wqxnYhgoSH5Wc3EjWp1J0ueFI6AzmOfTBbdUy6L6BY4?= =?Windows-1252?Q?457bpQqnfdvqRMOu3N9Y9c+PIMCha4iuNNCHWprd8hL9EjW6HbfpCtGF?= =?Windows-1252?Q?xKBfv5JtOKxX/0oQHGAGROSYlzAqVQR+Xkc4Dy4sypwuYqYFXdTSjQfm?= =?Windows-1252?Q?ZUy0FFvLH9M487dUO5i7WXsa4DSvL7fB/95OY62rCQhVcbN0RS/xForA?= =?Windows-1252?Q?3s4g5FQQrKzCw2vlNJw2QBtMyYcd/BK9sk8cDxUnnTzAq7+lBRIEOT7x?= =?Windows-1252?Q?6UPdrwjq2/Abv5DOvfuCZsOHIbGpYx7g8ydwiQA8iGV/Tn9RAZp7nslM?= =?Windows-1252?Q?CIu59AdtcDqGTiMaPvie3aT3bz82Z1c+VneojT7eVrbmBL1p/xHiF4O/?= =?Windows-1252?Q?gVtqkkKFQ5cbYYoQanYFF7KwbG1H919vLTHP25LLQf4mZzJ5MewZLBxg?= X-OriginatorOrg: cornell.edu X-MS-Exchange-CrossTenant-Network-Message-Id: 650e10a2-65e2-494a-23e1-08d90e3b8ce3 X-MS-Exchange-CrossTenant-AuthSource: BN7PR04MB4388.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 May 2021 13:58:38.0670 (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: uNs4dR4eFW7I+OWzNSGLbVSHpG32oUAGx/kPyXPn0FxggikGZM2udxuBfPT5siXGTQT6iV9e3mHT7QvwyVD3mw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR04MB0244 X-Spam-Status: No, score=-0.1 required=5.0 tests=BAYES_00, 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: Mon, 03 May 2021 13:58:40 -0000 On 5/3/2021 8:57 AM, Maximilian.Blenk--- via Cygwin wrote: > Hello everyone, > > I noticed that latest Cygwin release (3.2.0-1) has an issue with python and unix domain sockets, although I’m not a 100% sure about the root cause. My best guess is that something is wrong with the unix domain dockets implementation. I would like to attach the cygcheck.out but it seems to exceed the 180kb limit mentioned on the website (even zipped) > > Simple Reproducer: > I tried to get the example shown at https://pymotw.com/3/socket/uds.html working. It works if I execute it with python3.5 (both client and server), but it doesn’t if I use python3.6 or newer (actually tested 3.6 and 3.7 on Windows 10): > > Correct Behavior: > Server: > $ python3.5 server.py > starting up on ./uds_socket > waiting for a connection > connection from > received b'This is the mess' > sending data back to the client > received b'age. It will be' > sending data back to the client > received b' repeated.' > sending data back to the client > received b'' > no data from > waiting for a connection > … > > Client: > $ python3.5 client.py > connecting to ./uds_socket > sending b'This is the message. It will be repeated.' > received b'This is the mess' > received b'age. It will be' > received b' repeated.' > closing socket > > Incorrect Behavior: > Server: > $ python3.7 server.py > starting up on ./uds_socket > waiting for a connection > Traceback (most recent call last): > File "server.py", line 27, in > connection, client_address = sock.accept() > File "/usr/lib/python3.7/socket.py", line 214, in accept > sock = socket(self.family, self.type, self.proto, fileno=fd) > File "/usr/lib/python3.7/socket.py", line 151, in __init__ > _socket.socket.__init__(self, family, type, proto, fileno) > SystemError: returned NULL without setting an error > > Client: > $ python3.7 client.py > connecting to ./uds_socket > sending b'This is the message. It will be repeated.' > closing socket > Traceback (most recent call last): > File "client.py", line 27, in > data = sock.recv(16) > ConnectionResetError: [Errno 104] Connection reset by peer I wonder if this has the same cause as the problem reported here: https://cygwin.com/pipermail/cygwin/2021-February/247884.html Mark, can you check that? Ken