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Date: | Thu, 10 Oct 2013 06:50:14 +0400 |
From: | Andrey Repin <anrdaemon AT yandex DOT ru> |
Reply-To: | Andrey Repin <cygwin AT cygwin DOT com> |
Message-ID: | <1616237262.20131010065014@mtu-net.ru> |
To: | "Frank, Matthew I" <matthew DOT i DOT frank AT intel DOT com>, cygwin AT cygwin DOT com |
Subject: | Re: cp creates unreadable file on Windows 7 |
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References: | <8FEF00DDD6C58843BF4ED3C1DCF80E9F6421A227 AT FMSMSX106 DOT amr DOT corp DOT intel DOT com> |
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Greetings, Frank, Matthew I! > I believe my problem is identical to the one reported in: > http://cygwin.com/ml/cygwin/2012-02/msg00456.html, but that message chain ended with > "mount your file system noacl" which isn't an option for me, so I'm looking for > other alternatives. Please explain, how it is not an option for you? > I create a file using cmd.exe in a directory created by cmd.exe. Then in Cygwin bash I > mkdir a directory (two levels deep) and cp the file into the new directory. The resulting > file is not readable by any Windows or Cygwin executable. I can't say whether this is > correct or not, but it surprised me. > I am on a corporate network (logged in using network credentials). The filesystem is NTFS, > the machine is Windows 7. I am an Administrator on the machine. I am using the new 64-bit > Cygwin installed in c:\users\mifrank\cygwin64, but the problem was originally reported by > several of my users, and they are using slightly older 32-bit versions of Cygwin installed > in c:\cygwin. > Reproducer. Step 1 (must be done in a cmd.exe shell.) > C:\>md dos-level1 > C:\>echo foo > dos-level1\bar > C:\>cat dos-level1\bar > foo > C:\>icacls.exe dos-level1\ > dos-level1\ BUILTIN\Administrators:(I)(F) > BUILTIN\Administrators:(I)(OI)(CI)(IO)(F) > NT AUTHORITY\SYSTEM:(I)(F) > NT AUTHORITY\SYSTEM:(I)(OI)(CI)(IO)(F) > BUILTIN\Users:(I)(OI)(CI)(RX) > NT AUTHORITY\Authenticated Users:(I)(M) > NT AUTHORITY\Authenticated Users:(I)(OI)(CI)(IO)(M) > Successfully processed 1 files; Failed processing 0 files > C:\>icacls.exe dos-level1\bar > dos-level1\bar BUILTIN\Administrators:(I)(F) > NT AUTHORITY\SYSTEM:(I)(F) > BUILTIN\Users:(I)(RX) > NT AUTHORITY\Authenticated Users:(I)(M) > Successfully processed 1 files; Failed processing 0 files > Step 2 (from Cygwin bash shell) > $ cygcheck -V > cygcheck (cygwin) 1.7.25 > $ cd /cygdrive/c/ > $ groups > Domain Users Users > $ umask > 0022 > $ mkdir --parents cyg-level1/cyg-level2 > $ cat dos-level1/bar > foo > $ cp dos-level1/bar cyg-level1/cyg-level2/ > $ cat cyg-level1/cyg-level2/bar > cat: cyg-level1/cyg-level2/bar: Permission denied > $ icacls.exe cyg-level1/cyg-level2/ > cyg-level1/cyg-level2/ AMR\mifrank:(F) > AMR\Domain Users:(RX) > Everyone:(RX) > BUILTIN\Administrators:(F) > NT AUTHORITY\SYSTEM:(F) > BUILTIN\Users:(RX) > NT AUTHORITY\Authenticated Users:(M) > CREATOR OWNER:(OI)(CI)(IO)(F) > CREATOR GROUP:(OI)(CI)(IO)(RX) > Everyone:(OI)(CI)(IO)(RX) > Successfully processed 1 files; Failed processing 0 files > $ icacls.exe cyg-level1/cyg-level2/bar > cyg-level1/cyg-level2/bar AMR\mifrank:(D,Rc,WDAC,WO,RA,WA) > AMR\Domain Users:(Rc,S,RA) > Everyone:(Rc,S,RA) > Successfully processed 1 files; Failed processing 0 files > On the other hand: > $ echo fromcyg > cyg-level1/cyg-level2/baz > $ cat cyg-level1/cyg-level2/baz > fromcyg > $ icacls.exe cyg-level1/cyg-level2/baz > cyg-level1/cyg-level2/baz AMR\mifrank:(R,W,D,WDAC,WO) > AMR\Domain Users:(R) > Everyone:(R) > Successfully processed 1 files; Failed processing 0 files This sounds exactly like an issue you would run while trying to mix Cygwin ACL and corporate environment. TL;DR: Choose one. Either corporate-enforced ACL control, and disable Cygwin emulation of POSIX permissions, or Cygwin ACLs and keep away from corporate environments. -- WBR, Andrey Repin (anrdaemon AT yandex DOT ru) 10.10.2013, <06:44> Sorry for my terrible english... -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
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