Problem with posix flags and permission denied on domain computer

Jiří Engelthaler engycz@gmail.com
Tue May 19 06:46:00 GMT 2015


I'd like to hear an answer from Corinna Vinschen pls.

2015-05-13 19:22 GMT+02:00 schilpfamily <schilpfamily@gmail.com>:
> finally, someone else experiencing the same problems i have been
> seeing. i have to run chmod -r u+r,u+w * to fix this issue. cygwin
> really need to fix this.
>
> On Wed, May 13, 2015 at 8:17 AM, Jiří Engelthaler <engycz@gmail.com> wrote:
>> 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@gmail.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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