From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp-out-no.shaw.ca (smtp-out-no.shaw.ca [64.59.134.12]) by sourceware.org (Postfix) with ESMTPS id A0A5E389365C for ; Fri, 24 Apr 2020 22:01:25 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org A0A5E389365C Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=SystematicSw.ab.ca Authentication-Results: sourceware.org; spf=none smtp.mailfrom=brian.inglis@systematicsw.ab.ca Received: from [192.168.1.104] ([24.64.172.44]) by shaw.ca with ESMTP id S6NujwaP462brS6NwjemPw; Fri, 24 Apr 2020 16:01:25 -0600 X-Authority-Analysis: v=2.3 cv=LKf9vKe9 c=1 sm=1 tr=0 a=kiZT5GMN3KAWqtYcXc+/4Q==:117 a=kiZT5GMN3KAWqtYcXc+/4Q==:17 a=IkcTkHD0fZMA:10 a=yMhMjlubAAAA:8 a=Dq3f2ID1AAAA:20 a=9k8mWJA1Yg2V05ssIA4A:9 a=at9jVZ7HFJFEZ3ec:21 a=uvskPBMrq0lW2waI:21 a=QEXdDO2ut3YA:10 Reply-To: cygwin@cygwin.com Subject: Re: write() on 64 bit platform sometimes returns 32bit -1 as error indicator To: cygwin@cygwin.com References: <8FBD9FC4F4994493AE1DA1DDBBAFB6B9@DAD325> <20200424144206.GF1654005@calimero.vinschen.de> From: Brian Inglis Autocrypt: addr=Brian.Inglis@SystematicSw.ab.ca; prefer-encrypt=mutual; keydata= mDMEXopx8xYJKwYBBAHaRw8BAQdAnCK0qv/xwUCCZQoA9BHRYpstERrspfT0NkUWQVuoePa0 LkJyaWFuIEluZ2xpcyA8QnJpYW4uSW5nbGlzQFN5c3RlbWF0aWNTdy5hYi5jYT6IlgQTFggA PhYhBMM5/lbU970GBS2bZB62lxu92I8YBQJeinHzAhsDBQkJZgGABQsJCAcCBhUKCQgLAgQW AgMBAh4BAheAAAoJEB62lxu92I8Y0ioBAI8xrggNxziAVmr+Xm6nnyjoujMqWcq3oEhlYGAO WacZAQDFtdDx2koSVSoOmfaOyRTbIWSf9/Cjai29060fsmdsDLg4BF6KcfMSCisGAQQBl1UB BQEBB0Awv8kHI2PaEgViDqzbnoe8B9KMHoBZLS92HdC7ZPh8HQMBCAeIfgQYFggAJhYhBMM5 /lbU970GBS2bZB62lxu92I8YBQJeinHzAhsMBQkJZgGAAAoJEB62lxu92I8YZwUBAJw/74rF IyaSsGI7ewCdCy88Lce/kdwX7zGwid+f8NZ3AQC/ezTFFi5obXnyMxZJN464nPXiggtT9gN5 RSyTY8X+AQ== Organization: Systematic Software Message-ID: Date: Fri, 24 Apr 2020 16:01:22 -0600 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200424144206.GF1654005@calimero.vinschen.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-CA Content-Transfer-Encoding: 8bit X-CMAE-Envelope: MS4wfElKbpaE0VCiAGEMR8AN0LW9JSLaAyIfel5nF8Wt5Ft+9U+6sQMWyCEyCaID/AsgSdQ2gYSuAzsCtqYdvxpeZgFvCzpBc6ur6egnO6PNxubrKKr7XxbO UWP//J80xC+H+IATCKvyv9fp+JGTOL+QkG6k4/KNnH3WhUa4KdHiVWgjO8UP65Tg2jhTDJjl1WFg/Q== X-Spam-Status: No, score=-15.0 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, KAM_LAZY_DOMAIN_SECURITY, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_NONE, 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: Fri, 24 Apr 2020 22:01:26 -0000 On 2020-04-24 08:42, Corinna Vinschen wrote: > This problem is due to a restriction in Windows introduced with Windows > Vista. In theory it gets explained at length in "Changes to the file > system and to the storage stack to restrict direct disk access and > direct volume access in Windows Vista and in Windows Server 2008" in the > Help and Support Knowledge Base at http://support.microsoft.com/kb/942448. > Unfortunately, this KB article is current unaccessible for some reason. MS are blocking access to earlier unsupported (all Vista extended support ended 2017-04-11) system info: [ Vista kb942448 🔎] support.microsoft.com [links to https://support.microsoft.com/kb/942448] We would like to show you a description here but the site won’t allow us. Still readable via: https://web.archive.org/web/20180217230150/https://support.microsoft.com/en-us/help/942448/changes-to-the-file-system-and-to-the-storage-stack-to-restrict-direct -- Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada This email may be disturbing to some readers as it contains too much technical detail. Reader discretion is advised.