[Dovecot] Bug(?): LSUB returns empty string although subscribed (was: Re: Cannot subscribe to shared folders)

[Timo Sirainen]

It's a bug, yes. It's also already fixed in v2.1 code tree as a result
of large cleanups and fixes to mailbox/subscriptions listing.
Backporting the fixes to v2.0 (or even worse: v1.x) would probably be a
lot of trouble..

On Wed, 2011-02-16 at 20:31 +0100, Lukas Haase wrote:
> Hi,
> 
> I did further investigation on this issue (using raw IMAP commands) and 
> I think that this is a bug...
> 
> Am 15.02.2011 18:53, schrieb Lukas Haase:
> > Am 14.02.2011 14:54, schrieb Lukas Haase:
> >> Hi,
> >>
> >> I am unable to subscribe to shared folders (...)
> >> everything seems to be correct (dovecot 1.2).
> >>
> >> My configuration is the following (maybe that is the problem?!):
> >>
> >> namespace private {
> >>   separator = .
> >>   prefix =
> >>   inbox = no
> >>   list = no
> >>   hidden = yes
> >>   location = maildir:~/Maildir-root
> >>   subscriptions = yes
> >> }
> >>
> >> namespace private {
> >>   separator = .
> >>   prefix = INBOX.
> >>   inbox = yes
> >>   subscriptions = yes
> >> }
> >>
> >> namespace public {
> >>   separator = .
> >>   prefix = Shared.
> >>   location = maildir:/var/mail/shared:INDEX=~/Maildir/shared:LAYOUT=fs
> >>   subscriptions = YES / NO <--
> >> }
> >> [...]
> 
> In each case I make sure that all folders are subscribed, that is, the 
> subscribe command returns OK and the subscribed folders are written into 
> /var/mail/shared/subscriptions and ~/Maildir-root/subscriptions, 
> respectively. Just to make sure:
> 
> # cat /var/mail/shared/subscriptions
> NoSpamDrop
> Public
> SpamDrop
> # cat /home/lukas/Maildir-root/subscriptions
> Shared.NoSpamDrop
> Shared.Public
> Shared.SpamDrop
> #
> 
> It turns out that if I set
> 
> 1.) subscriptions = yes (in the public namespace above)
>      the lsub command behaves correct:
> 
>      . list "" "Shared.*"
>      * LIST (\HasNoChildren) "." "Shared.NoSpamDrop"
>      * LIST (\HasNoChildren) "." "Shared.Public"
>      * LIST (\HasNoChildren) "." "Shared.SpamDrop"
>      . OK List completed.
>      . lsub "" "Shared.*"
>      * LSUB () "." "Shared.NoSpamDrop"
>      * LSUB () "." "Shared.Public"
>      * LSUB () "." "Shared.SpamDrop"
>      . OK Lsub completed.
>      . logout
>      * BYE Logging out
>      . OK Logout completed.
>      closed
> 
> 2.) ...but with subscriptions = no
>      the lsub command returns an empty list ALTHOUGH the folders are
>      subscribed:
> 
>      . list "" "Shared.*"
>      * LIST (\HasNoChildren) "." "Shared.NoSpamDrop"
>      * LIST (\HasNoChildren) "." "Shared.Public"
>      * LIST (\HasNoChildren) "." "Shared.SpamDrop"
>      . OK List completed.
>      . lsub "" "Shared.*"
>      . OK Lsub completed.
>      . logout
>      * BYE Logging out
>      . OK Logout completed.
> 
> Now I am pretty sure that this is a bug. Maybe it is better to file a 
> bug report?
> 
> Best regards,
> Luke
> 
>