[Dovecot] Doveadm search in public namespaces

Timo Sirainen tss at iki.fi
Thu Dec 30 14:43:24 EET 2010

On Thu, 2010-12-30 at 13:25 +0100, Thomas Leuxner wrote:
> Did some tests with the fix, not sure it works correct/as expected:
> $ time doveadm fetch -u user at domain.tld hdr mailbox Public/Mailing-Lists/Dovecot uid 1039
> real    0m0.053s
> $ time doveadm fetch -u user at domain.tld hdr mailbox-guid adeffe1c8b7ba64bb3770000a998a2df uid 1039
> real    0m0.418s
> It takes considerably longer when using 'mailbox-guid' compared to mailbox name, wonder why that is…

It's because there is no easy way to access mailbox GUIDs, so it has to
open each mailbox and get its GUID.

> I'm also not sure why it would recursively mangle all
> 'dovecot-uidlist' files within the namespace (it does in a public
> maildir namespace). 

The mailbox GUID is stored in dovecot-uidlist file. If the mailbox
doesn't already have a GUID, it's added there.

> This is really dangerous when missing the proper -u parameter. Say you
> run it as 'root' and it should be run by 'vmail' really, then
> effectively all 'dovecot-uidlist' files will be owned by the wrong
> user afterwards… (root vs. vmail).

Well, I'm not really sure what to do about this.. Maybe it should refuse
to run as root, but maybe some people actually want to do that..
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