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Date: Wed, 13 May 2015 14:17:07 +0200
Message-ID: <CAHODtZS3eN4EOnhwx0nMsooqWpkY_TRcuZXLhzRVpSV6pGH+sg@mail.gmail.com>
Subject: Re: Problem with posix flags and permission denied on domain computer
From: =?UTF-8?B?SmnFmcOtIEVuZ2VsdGhhbGVy?= <engycz AT gmail DOT com>
To: cygwin AT cygwin DOT com
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Digging couple of hours found the cause. File security.cc line 389
RtlGetGroupSecurityDescriptor gets group SID "DOM_LAN\Domain Users"
but this group is not in Access list parsed in get_attribute_from_acl
function. I think this is not only my problem and hope Cygwin will be
fixed.

Powershell get-acl:
PS D:\> get-acl foo|format-list


Path   : Microsoft.PowerShell.Core\FileSystem::D:\foo
Owner  : DOM_LAN\engycz
Group  : DOM_LAN\Domain Users
Access : BUILTIN\Administrators Allow  FullControl
         NT AUTHORITY\SYSTEM Allow  FullControl
         NT AUTHORITY\Authenticated Users Allow  Modify, Synchronize
         BUILTIN\Users Allow  ReadAndExecute, Synchronize
Audit  :
Sddl   : O:S-1-5-21-270207346-1464484900-1734353810-5370G:DUD:(A;ID;FA;;;BA)(A;ID;FA;;;SY)(A;ID;0x1301bf;;;AU)(A;ID;0x1200a9;;;BU)

=========

PS D:\> get-acl bar|format-list


Path   : Microsoft.PowerShell.Core\FileSystem::D:\bar
Owner  : DOM_LAN\engycz
Group  : DOM_LAN\Domain Users
Access : DOM_LAN\engycz Deny  ReadData, ReadExtendedAttributes, ExecuteFile
         Everyone Allow  ReadAttributes, ReadPermissions, Synchronize
         NT AUTHORITY\Authenticated Users Allow  Modify, Synchronize
         NT AUTHORITY\SYSTEM Allow  FullControl
         BUILTIN\Administrators Allow  FullControl
         BUILTIN\Users Allow  ReadAndExecute, Synchronize
         DOM_LAN\Domain Users Allow  ReadAndExecute, Synchronize
         DOM_LAN\engycz Allow  ReadAttributes, WriteAttributes,
Delete, ReadPermissions, ChangePermissions, TakeOwnership, Synchronize
Audit  :
Sddl   : O:S-1-5-21-270207346-1464484900-1734353810-5370G:DUD:P(D;;CCSWWP;;;S-1-5-21-270207346-1464484900-1734353810-5370)(A;;0x120080;;;WD)(A;;0x1301bf;;;AU)(
         A;;FA;;;SY)(A;;FA;;;BA)(A;;0x1200a9;;;BU)(A;;0x1200a9;;;DU)(A;;0x1f0180;;;S-1-5-21-270207346-1464484900-1734353810-5370)

2015-05-12 21:02 GMT+02:00 Jiří Engelthaler <engycz AT gmail DOT com>:
> I have problem with posix file flags and permission denied on computer
> which is in domain. I have file on disk D: named foo. It is accessible
> both in Windows and in Cygwin as /cygdrive/d/foo but has flags
> ----rwx---+. If I copy this file to file named bar, it is not
> accessible in Cygwin nor in Windows.
> Fresh Windows installation, fresh Cygwin 2.0.2-1, foo file created in
> notepad. As user engycz I'm member of group "NT
> AUTHORITY\Authenticated Users" and "BUILTIN\Users" so I have R/W
> access to foo.
>
> $ ls -al foo
> ----rwx---+ 1 engycz Domain Users 5 12. 5  20.15 foo
>
> $ cat foo
> hello
>
> $ getfacl.exe foo
> # file: foo
> # owner: engycz
> # group: Domain Users
> user::---
> group::---
> group:Authenticated Users:rwx
> group:SYSTEM:rwx
> group:Administrators:rwx
> group:Users:r-x
> mask:rwx
> other:---
>
> $ icacls.exe foo
> foo BUILTIN\Administrators:(I)(F)
>     NT AUTHORITY\SYSTEM:(I)(F)
>     NT AUTHORITY\Authenticated Users:(I)(M)
>     BUILTIN\Users:(I)(RX)
>
> ====================
> $ cp foo bar
> ====================
>
> $ ls -al bar
> ----rwx---+ 1 engycz Domain Users 5 12. 5  20.18 bar
>
> $ cat bar
> cat: bar: Permission denied
>
>
> $ getfacl.exe bar
> # file: bar
> # owner: engycz
> # group: Domain Users
> user::---
> group::r-x
> group:Authenticated Users:rwx
> group:SYSTEM:rwx
> group:Administrators:rwx
> group:Users:r-x
> mask:rwx
> other:---
>
> $ icacls.exe bar
> bar DOM_LAN\engycz:(DENY)(S,RD,REA,X)
>     DOM_LAN\engycz:(D,Rc,WDAC,WO,RA,WA)
>     DOM_LAN\Domain Users:(RX)
>     Everyone:(Rc,S,RA)
>     BUILTIN\Administrators:(F)
>     NT AUTHORITY\SYSTEM:(F)
>     NT AUTHORITY\Authenticated Users:(M)
>     BUILTIN\Users:(RX)

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