doveadm import - strange warning

[Philipp Faeustlin]

Am 27.07.2015 um 11:41 schrieb Ralf Hildebrandt:
> * Daniel Tröder <troeder at univention.de>:
>
>> Just guessing…
>>
>> The signature of the command is:
>> doveadm [-Dv] import [-S socket_path] [-s] -u user source_location
>> dest_parent search_query
>>
>> You supply "" as dest_parent which I guess could mean ".", and that may
>> be "/root" when run as root. Try "INBOX" or "restore_folder" and see if
>> the error vanishes.
>
> With "INBOX", nothing changes on the output (although the script
> doesn't restore properly anymore)
>
> With ".", I get:
>
I think there are two independent errors.
First:
> doveadm(restore at backup.invalid): Error: chdir(/root/) failed: Permission denied (euid=1001(theid) egid=1001(theid) missing +x perm: /root, dir owned by 0:0 mode=0700)
> doveadm(restore at backup.invalid): Error: chdir(/root) failed: Permission denied
Here I think doveadm import tries to do a chdir to the users HOME 
Directory and does it wrong. It uses the bash environment variable $HOME 
instead of the users home information as shown by doveadm user.

Why do I think so, because if I manually export the bash environment 
HOME to the Home Directory of the user I want to import to I don't 
receive this error anymore.

Example:
export HOME="/mailhome/userA"
doveadm import -u userA maildir:/backup/userA Backup ALL;
-> No Error
export HOME="/root"
doveadm import -u userA maildir:/backup/userA Backup ALL;
-> Error as seen above.

Second:
> doveadm(restore at backup.invalid): Error: Couldn't create mailbox ./INBOX: Invalid mailbox name: Contains '.' part
This error is dependent on your namespace.
If using standard maildir with "/" as separator then "./INBOX" isn't a 
correct Mailbox name, because dot is not allowed. In this case it should 
only be "INBOX".
But as I said before this depends on your configuration.
If I'm not sure, I check the notation by using doveadm mailbox list -u 
userA.
>
> I still think this is an obscure bug :)
>
If the first error is a bug or a feature I don't know, but doveadm 
import works correct with or without this error shown. At least for the 
things I have done.