Problem with linux permissions mapped to WinNT rights

[John Trostel]

On 23-Apr-2001 Olaf Fr±czyk wrote:
> Hi,
> I noticed something strange with mapping ACLs to WinNT rights.
> samba 2.2.0 from RH rpm, no acl support, kernel 2.4.3 without ACL support,
> WinNT 4.0 Workstation ServicePack 6a Polish:
> Step 1: give all permisions to user,group,world eg. chmod 777 testfile
> Step 2: look at permisions from WinNT: looks good, user,group and everyone
> have rwx access.
> Step 3: Remove from WinNT all (rwx) access for Everyone
> Step 4: Close window in WinNT
> Step 5: Check permissions, you will get:
> linux: rights for file: r--------, from WinNT: user:R,group:O,
> everyone:O. O=take ownership (translated from polish).
> So, why, when I change permissions for everyone, also permissions for
> group, and owner gets changed!?
> Similiar behaviour is when I remove all rights for group.

This is the 'expected' behavior of Samba.

1. The file 'owner' always retains read access to his files

2. The 'Take Ownership' bit 'O' is overloaded in Samba to indicate a zero '0'
for no permissions.

> Exactly the same behaviour for the above cases I have for:
> samba --with-acl-support, and kernel with XFS ACLs. Additionally,
> when removing access for everyone, or for group, all other users added
> to ACL, also lost their rights.
>
> Everything is good, if when removing all rights for Everyone or for group
> I set the 'O' right for them in WinNT. 
> 
> And one more thing, when ACL support enabled, I can't change permissions
> on files which are on file system without ACL support:
> xfs - I can change permissions,
> ext2 - I can't change (I can, when I don't enable ACL support)
> 
> Regards,
> 
> Olaf Fraczyk, <olaf at cbk.poznan.pl>

I'm rolling a new kernel with the latest XFS patches (from Steve Lord from this
weekend) and will try it with Samba 2.2.0 shortly.

-- 
John M. Trostel
Linux OS Engineer
Connex
jtrostel at connex.com