I managed to get it working using a litle change in sources
an extra mailbox_list_subscription_fill_one(dest_list, src_list, "" );
in 
src/lib-storage/list/mailbox-list-subscriptions.c:mailbox_list_subscriptions_refresh()

--- src/lib-storage/list/mailbox-list-subscriptions.c   (wersja 494)
+++ src/lib-storage/list/mailbox-list-subscriptions.c   (kopia robocza)
@@ -142,6 +142,9 @@
        subsfile_ctx = subsfile_list_init(dest_list, path);
        if (subsfile_list_fstat(subsfile_ctx, &st) == 0)
                dest_list->subscriptions_mtime = st.st_mtime;
+
+       mailbox_list_subscription_fill_one(dest_list, src_list, "" );
+
        while ((name = subsfile_list_next(subsfile_ctx)) != NULL) T_BEGIN {
                T_BEGIN {
                        ret = mailbox_list_subscription_fill_one(dest_list,


now lsub works as expected, namespace root which is an INBOX from a
snapshot is subscribed, all the subfolders are also subscribed (from
original subscriptions file).


It whould be great if one could specify in the namespace mailboxes
that whould get autosubscribed or just to autosubscribe root whitch is
what You need if You have a copy of Maildir with INBOX. If You think
this can be usefull I will try to produce more general patch
automagicly subscribing root or any other mailbox in an namespace.



Regards,

Michal Grzedzicki

2012/8/21, Lazy <lazy...@gmail.com>:
> 2012/8/19, Timo Sirainen <t...@iki.fi>:
>> On 16.8.2012, at 14.58, Lazy wrote:
>>
>>> 2012/5/19 Timo Sirainen <t...@iki.fi>:
>>>> On Wed, 2012-05-16 at 12:39 +0200, Lazy wrote:
>>>>> May 16 12:11:36 thebe2 dovecot: imap(lazy): Error:
>>>>> open(/snapshot/h1/vmail/la/lazy/Maildir/.SPAM/dovecot-uidlist.lock)
>>>>> failed: Read-only file system
>>>>
>>>> Does the attached patch help?
>>>>
>>>>> maybe it will be easier to move all dovecot metadata to separate (non
>>>>> snapshot) location ?
>>>>
>>>> It could also be a bit problematic. At least message keywords (=custom
>>>> flags) wouldn't work because the dovecot-keywords file exists only in
>>>> the snapshot dir.
>>>
>>> Moving metadata helped, but now archived inbox is unsubscribed. Is
>>> there a way to make all folders in an namespace subscribed by default
>>> ?
>>
>> Nope. I could try to get the snapshots fixed at some point when I have
>> more
>> time, but I'm not going to add a feature to subscribe everything by
>> default.
>> People might try to start using it.
>
> If I enable per snapshot subscriptions i see all folders except INBOX,
> i have tried to subscribe it using
> mailbox_list_subscription_fill_one() or using imap as bellow without
> success
>
> http://dovecot.org/list/dovecot/2007-October/025965.html suggest that
> it isn't possible
>
> ./imap/.libs/imap
> * PREAUTH [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID
> ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS
> MULTIAPPEND UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED
> I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN
> CONTEXT=SEARCH LIST-STATUS SPECIAL-USE] Logged in as root
> a subscribe "test"
> a OK Subscribe completed.
> a lsub "" "*"
> imap(root): Warning: Subscriptions file /root/Maildir/subscriptions:
> Removing invalid entry:
> * LSUB () "." "Drafts"
> * LSUB () "." "Sent"
> * LSUB () "." "Junk"
> * LSUB () "." "Trash"
> * LSUB () "." "Deleted Messages"
> * LSUB () "." "test.Drafts"
> * LSUB () "." "test.Sent"
> * LSUB () "." "test.Junk"
> * LSUB () "." "test.Trash"
> * LSUB () "." "test.Deleted Messages"
> a OK Lsub completed.
> b list "" "*"
> * LIST (\HasNoChildren) "." "DUpa"
> * LIST (\HasNoChildren) "." "Deleted Messages"
> * LIST (\HasNoChildren) "." "Junk"
> * LIST (\HasNoChildren) "." "Trash"
> * LIST (\HasNoChildren) "." "Sent"
> * LIST (\HasNoChildren) "." "Drafts"
> * LIST (\HasNoChildren) "." "INBOX"
> * LIST (\HasChildren) "." "test"
> * LIST (\HasNoChildren) "." "test.TEst"
> * LIST (\HasNoChildren) "." "test.Deleted Messages"
> * LIST (\HasNoChildren) "." "test.Junk"
> * LIST (\HasNoChildren) "." "test.Trash"
> * LIST (\HasNoChildren) "." "test.Sent"
> * LIST (\HasNoChildren) "." "test.Drafts"
> b OK List completed.
>

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