[Dovecot] INBOX stored in AFS

[Timo Sirainen]

On Mon, 2008-10-20 at 16:16 +0200, Hans-Werner Paulsen wrote:
> When I start my imap-client, I see the content of the INBOX, and I can
> read, delete, ... the different entries. But when new mail arrives dovecot
> (and my imap-client) will never notice this. And when I quit my imap-client
> the dovecot imap server will write back its view of the INBOX, and delete
> this new mail.
> This seems to be a problem related to AFS. I poked in the dovecot code and
> have the following theory: dovecot opens the INBOX R/W, dovecot calls "stat"
> on the INBOX file periodically to look for modifications. But this does
> not work, because this machine will stat the local copy (AFS cache) of the
> INBOX as long as this file is still open R/W.

I'd have thought that the local view was updated at least after fcntl
locking the mailbox.

> My questions:
> Is it possible to have a configuration, that the INBOX file is not left open
> when stat-ing this file?
> Or is it possible to open the INBOX file R/W only when it us locked?
> Or is it necessary to modify the code?

It's necessary to modify the code. Probably not difficult (maybe in
mbox_unlock()), but I'd rather not change that code permanently since
this is a pretty AFS-specific problem..

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