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Access control lists

To: linux-xfs@xxxxxxxxxxx
Subject: Access control lists
From: "Orn E. Hansen" <oe.hansen@xxxxxxxxxxxxxxxxxxx>
Date: Sun, 24 Jun 2001 12:39:29 +0200
Reply-to: oe.hansen@xxxxxxxxxxxxxxxxxxx
Sender: owner-linux-xfs@xxxxxxxxxxx
  I don't know if this is relevant, but I'm using linux 2.4.3, compiled with 
XFS support.  And had a few starting problems, first was that the kernel hung 
up on me, if I didn't compile ACL cupport into the kernel along with XFS.  
This is not mentioned in the howto.  The second, is the use of the acl :-)

  I've got the XFS file system mounted under /opt/xfs ... and then I've got 
the following file in that directory:

-rw-r--r--    1 root     root           46 Jún 24 12:16 testing               

It's parent directory looks like this:

drwxrwxrwx    2 root     root           20 Jún 24 12:16 xfs

Anybody can write to the directory... now the acl of the file testing looks 
like this:

 /opt/xfs/testing []                                                         

And then another user logs in, and edits the file with 'vi' and writes with 
':w!' this is what it looks like after that ordeal:

-rw-r--r--    1 asta     users          21 Jún 24 12:27 testing               

Then I try setting access control... to see if its the missing acl that is 
the problem.

/opt/xfs/testing [u::rw-,g::r--,o::r--,u:oehansen:rw-,m::r--]                

and make root the owner again... and again, the user asta tries to edit the 
file:

-rw-r--r--    1 asta     users          29 Jún 24 12:32 /opt/xfs/testing     

I think this is a major concern...


Sincerely,
  Orn



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