From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mout.gmx.net (mout.gmx.net [212.227.15.19]) by sourceware.org (Postfix) with ESMTPS id 166463858D39 for ; Thu, 6 Jan 2022 09:03:04 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 166463858D39 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=gmx.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=gmx.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1641459783; bh=8S9pzPq+Gqn7kw2GqwHBfzeIzUfuzK0TKlePw7/Yobg=; h=X-UI-Sender-Class:Date:Subject:To:References:From:In-Reply-To; b=SszQNGj8jUgjbxsUNSupoap//VN/jP05tQMAzBWB0MydsCIC+hrdSznDTykOHwLWb 7KgJ9XzCCBObcHP+FS+hQKmQXCydU2W0xrufUIjSoqcO82kl2I3mkeH7EHWLfYP+6i QuiAyIHkclRCRp/QHiyeLKGNtJ+lETzrg+tJLjzw= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from [192.168.15.101] ([88.97.26.74]) by mail.gmx.net (mrgmx005 [212.227.17.184]) with ESMTPSA (Nemesis) id 1MFKGZ-1nCEJS2NrN-00Fh2A for ; Thu, 06 Jan 2022 10:03:03 +0100 Message-ID: <7d756609-3681-d150-582a-e9d23765e4b2@gmx.com> Date: Thu, 6 Jan 2022 09:03:03 +0000 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.4.1 Subject: Re: A notion about saving and restoring Windows file security info Content-Language: en-GB To: cygwin@cygwin.com References: <4c5fda33-8f7e-53d2-85ce-28eb11cfb978@cs.umass.edu> <7cea7819-c03e-60c2-1acc-380b1bd0c18f@cs.umass.edu> From: Sam Edge In-Reply-To: <7cea7819-c03e-60c2-1acc-380b1bd0c18f@cs.umass.edu> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:F+flZ+t7soIdcXA8WO0+JIU07QnZ24FHnxDGtshSeqWHtWQ3fOI Ccxa78+2wF3gM+Yz533xXxGHPdsLuCObU3M14wZFiluaMQP+VVLIGYI5AUbMWSqG6Oo/4AI z68/HZs1ZGOcf4vy6XpaDoVcYK0pBsorHinXTCjJBSb2cz5crXCOQH5luxvqsoqTxSkrbRq cXjuIl/ZExba8YGoqrC5Q== X-UI-Out-Filterresults: notjunk:1;V03:K0:RDY3WSMz1fI=:CtO3T2a1QIV05nZ6EH9k/H DRMGWvJNAL1DX2KgoCj4hyJnkW4q++OPj2YF8azXy/QnJbgPwvrGcrjatzp6gsI1boIqqEb/p qhsqsCBp6nbeuRRmhNZm29JKg732ZfGhEunCA9mLO1fhSlc7CGIT/XpkA6fPJ+xjJXYe7XtkD qwpl3JVZgJ9cKvG752aZuCPOUfkydwXTwBMjj0OrMcRHPp9hg0HwX+c6d4Wv6gTtb/yaqf/7A PIprNbVPnIYY/Y5m7j6OCkJx2FjIRfAkNrVl1s+2k0fK8nGJjCpCu1ul3ExPPRa7V5opJ3CqR cnF/NmHDo3werEhYO6r7dMPLOomwMwU+SA70j5oMRIQNdkWbLhzO/LIBDbgf22sRtWy70Bo0G JkJvP0ER/rtgG/2jdaMRyEZQJbUwPActMluOEIyQUKucxWd8Y7JA3EXdi5tfDdRpYGpMbtPHJ 0dEmOVzb/Q5sReGA1MMpIAt4+gt1sRTkazZLIohORkhvw4LRNsPlMr4RhIy9x/F+l3MZSjANp Di3uku/+rRMf+GdOPISEbq4zdQf+hbTOXzzJIhNx2Lu6VSTNu+LK45HesZJR45irPm05nWn3h aVSvM9j7sJAvMg/uZr10VXPlYsi2tWmkez+474PekafMlGu47XJF2pSPp68rbFF0AhJOELAqq kDfDusBaib9wo2GNZUXKzuvgYvRLsoYHGZcP2K0dJd7c0Lh9fSQu46QIWGTBlHHcsluOJCTjQ AmqioIju6uV8JOU482t07BQ8qkrbTUn3cBWBoJznbiGMjpnkKTxY/fBGtn0WYlgtU0LOf4E1h 07wBO9FNkucYFzztAnZwjMDMeBGQrmkv3vENPA1dRMPJkkPSZBRIHwyTgLlq4d7NAYcy/5Hdc uTbPTBEMBmP0a+mULYVSD38H+KhE+iG6jSrQRvhjo0onqBZfbdOEYz1e7jrRz8z644Yry3S8L CdGeZi7BwucBaFVzGN1d/qg0wVT6WunwyrbMV0SNt8OEP+/Nx6rRnoc9jx67cR/dGNkfGHIab z+ktv6CZZj+jSye+ZnqCdxHQLrTDF34nd15ibFXlE/B0Ko+ye4fWLzh5hQDKNhZHg1dQXvY5e XecHiV8UZ2BY/8= X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, FREEMAIL_FROM, NICE_REPLY_A, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) 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, 06 Jan 2022 09:03:06 -0000 On 05/01/2022 17:41, Eliot Moss wrote: > Therefore, my thought is to make the presentation of these > attributes by attr_list (is that the canonical call?) and probably also the > special interpretation of them for get/set, controllable in some way. The > means of control that occurs to me is an environment variable, or a flag > within the CYGWIN env var. Other folks more deeply involved in Cygwin library > code, etc., may have a more informed notion of the best way to control this, > but it strikes me as one of those things that you would have to ask for. > > In principle, each of Attrs, SDs, and ADS_ could be separately controlled, if > we think that is important (might be). > Hi Eliot. I can see the appeal of mapping hidden/system/readonly to suitably namespaced xattrs and exposing ADSes. However I would caution about having too many selectable options as the behaviour for every combination in the running system would have to be considered against filesystems that have been manipulated with every other combination. As the recent update to setup.exe has shown, even the different types of symlink handling can cause unforeseen problems and that's a single option with only a few possible values that only affect how they're written and not how they're read. Just a thought. -- Sam Edge