[Tickets #13341] Re: Cannot set ACL for owner

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Ticket URL: http://bugs.horde.org/ticket/13341
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  Ticket             | 13341
  Updated By         | Michael Slusarz <slusarz at horde.org>
  Summary            | Cannot set ACL for owner
  Queue              | IMP
  Version            | 6.2.0
  Type               | Bug
-State              | Unconfirmed
+State              | Not A Bug
  Priority           | 1. Low
  Milestone          |
  Patch              |
  Owners             |
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Michael Slusarz <slusarz at horde.org> (2014-07-11 09:30) wrote:

This is not a bug.

IMP has no way of knowing 1) who is the "owner" of the mailbox, or 2)  
*which* rights will be affected for any rights alteration.  This is  
all known/expected/explained in the RFC.

E.g., trying to remove the delete right on the owner user:

C: 3 GETACL Testing.AAB
S: * ACL Testing.AAB slusarz lrwstipekxacd
S: 3 OK Getacl completed.
C: 4 SETACL Testing.AAB slusarz -t
S: 4 OK Setacl complete.
C: 5 GETACL Testing.AAB
S: * ACL Testing.AAB slusarz lrwstipekxacd
S: 5 OK Getacl completed.

As can be seen, the delete right was successfully removed via GUI  
request, but the actual rights on the server didn't change.

Directly from RFC 4314 [Appendix C]:

    2.  Because this extension leaves the specific semantics of how
        rights are combined by the server as implementation defined, the
        ability to build a user-friendly interface is limited.