Copying EAs and ACLs

Ben Escoto bescoto at
Tue Mar 4 12:29:50 EST 2003

>>>>> "jws" == jw schultz <jw at>
>>>>> wrote the following on Sun, 2 Mar 2003 04:50:23 -0800

  jws> EAs seem to be unsupported by most of the UNIX platforms.  Pipe
  jws> up now if you know of support for them on any mainstream UNIX.

On the rdiff-backup mailing list I referenced your message and got
this response:

From: Greg Freemyer <freemyer at>
Date: Mon, 3 Mar 2003 18:00:23 -0500 (15:00 PST)
To: Ben Escoto <bescoto at Stanford.EDU>, <rdiff-backup-users at>

 >>  For
 >>  a thoughtful summary of rsync's ACL/EA issues, see this message that
 >>  J.W. Schultz just posted to the rsync mailing list:



I'm not on the rsync mailing list, but the writer asks if any
mainstream UNIXs support EAs (as opposed to ACLs).

I know that the following do:
   VxFS  (from Veritas, heavily used in HP-UX and Solarix at a minimum)
   AdvFS (From Tru64 (i.e. Compaq/HP)) 
   UFS, NFS  (As patched for Tru64 from Compaq/HP) 
   XFS and CXFS (From SGI's UNIX  and their Linux XFS port as well).

So in the top 5 Commercial UNIXes, the only one that may not support
EAs is AIX.  (I don't know AIX).

FYI: Tru64 man page:

Unfortunately, I don't know of any kind of compatibility amongst the
above, but I'm no expert.

Also, IIRC ACLs are required for DOD Orange Book qualified secure

Feel free to forward this info to the rsync list.


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