[Dovecot] dovecot-acl file questions

[Timo Sirainen]

On Tue, 2009-06-16 at 11:40 +0200, Steffen Kaiser wrote:
> playing around with Dovecot's v1.2 ACLs I wondered about some things about 
> the dovecot-acl files:
> 
> + They are created within the Maildirs, as described in 
> http://wiki.dovecot.org/ACL.
> 
> But why? Shouldn't they belong to the CONTROL= directories? So it is more 
> compatible with filesystem quota.

dovecot-acl-list's point is that all users see that file, but in some
setups each user has separate control directories.

> + They have 0666 permissions, but all other files (e.g. when I create a 
> new mailbox) have 0660 permissions.

I think this was a bug that was fixed by
http://hg.dovecot.org/dovecot-1.2/rev/c8bb7c18f17b

> + When one removes all rights, the size of the file drops to zero. The 
> wasted space is no great deal; but how much processing is wasted if such 
> file is present? I mean, the log says that the files are opened very 
> regularily. Would it help to remove zero-size files?

Empty dovecot-acl-list file is better for performance. If it didn't
exist, Dovecot would rebuild it by going through all mailboxes.


> It looks like Dovecot first writes a temp file (*.lock), then replaces the 
> dovecot-acl file only, if no over quota happens.
> There is a problem, if dovecot-acl could be updated, but dovecot-acl-list 
> could not. SETACL succeeds in this case, is this a problem?

This should help with it: http://hg.dovecot.org/dovecot-1.2/rev/8206c38856ff

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