From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp-out-no.shaw.ca (smtp-out-no.shaw.ca [64.59.134.13]) by sourceware.org (Postfix) with ESMTPS id 2425B3851C17 for ; Sat, 23 May 2020 23:05:29 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 2425B3851C17 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 cdCnjuijv62brcdCpjLWaS; Sat, 23 May 2020 17:05:27 -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=ObcLf_uJAAAA:20 a=7PU9pcOHAAAA:20 a=8LUVpwpKAAAA:20 a=q97CNgFZAAAA:20 a=jChkm-x5hCMFubTIiR0A:9 a=QEXdDO2ut3YA:10 a=pHzHmUro8NiASowvMSCR:22 a=n87TN5wuljxrRezIQYnT:22 Subject: Re: Cygwin doesn't support IO_REPARSE_TAG_APPEXECLINK To: cygwin@cygwin.com References: Reply-To: cygwin@cygwin.com 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: <361e2269-932b-2a60-ec20-1fcb6d24351e@SystematicSw.ab.ca> Date: Sat, 23 May 2020 17:05:25 -0600 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-CA Content-Transfer-Encoding: 8bit X-CMAE-Envelope: MS4wfAfXXgUgjD9Yt0x7AcYucAqze/Qe1bRShqYEJDuLquGDG/1eXT9K2HzerkNKO3PKa73qxx4FSngJ7OL+J7uEguZiMh8P98FEZlHDYCDotD8rYTZG+g/P 5POnf7U9hqDdQw8PESz6IZBB18FxWgOc8D/zvwV61CYdZ8VBrlS8azltl6LWEKB9oJ1GveFPZ/F8/w== X-Spam-Status: No, score=-13.9 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, KAM_LAZY_DOMAIN_SECURITY, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H2, 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: Sat, 23 May 2020 23:05:32 -0000 On 2020-05-23 09:50, Marco Atzeri via Cygwin wrote: > On 23.05.2020 17:09, Kagami Rosylight via Cygwin wrote: >> I found that Cygwin can’t run UWP based CLI tools, as they expose their >> executables as reparse points with the tag IO_REPARSE_TAG_APPEXECLINK which >> Cygwin does not support. >> >> Way to reproduce this issue on Cygwin: >> >> 1. Install Python from Microsoft Store: >> https://www.microsoft.com/en-us/p/python-38/9mssztt1n39l (assuming you don’t >> already have python3.8 on your PATH.) >> 2. Try running `python3.8` on Cygwin. It will say >> “/cygdrive/c/Users/Kagami/AppData/Local/Microsoft/WindowsApps/python3.8: >> Permission denied” >> 3. Check it’s real path by `get-childitem -path >> C:/Users/Kagami/AppData/Local/Microsoft/WindowsApps/python3.8.exe` on >> PowerShell. It’s `C:\Program >> Files\WindowsApps\PythonSoftwareFoundation.Python.3.8_3.8.1008.0_x64__qbz5n2kfra8p0\python3.8.exe`. >> >> 4. Try running python again with that path. This succeeds. >> >> I posted this issue on MSYS2 GitHub repo >> (https://github.com/msys2/MSYS2-packages/issues/1943) but I think Cygwin is >> the right place to file this. >> >> Relevant prior works: >> >> * Python >> https://github.com/python/cpython/commit/df2d4a6f3d5da2839c4fc11d31511c8e028daf2c >> * libuv >> https://github.com/libuv/libuv/commit/e7ebae26247d2fee0a04547eb7f9aa8f78d4a642 >> * PowerShell https://github.com/PowerShell/PowerShell/pull/10331 > Not clear why you expect that a Windows specific tag as > IO_REPARSE_TAG_APPEXECLINK should be supported on a Posix platform ? > > Moreover all the documentation from MS seems > > https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-fscc/c8e77b37-3909-4fe6-a4ea-2b9d423b1ee4 > > that seems a bit short to help third party in properly using it. I think the general point being made is that /some/ Windows tools can not be run from Cygwin. I wonder what happens if the OP runs "cygstart python3.8"? -- 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. [Data in IEC units and prefixes, physical quantities in SI.]