[Dovecot] dotlock error

[Timo Sirainen]

Put index/control files elsewhere. See http://wiki2.dovecot.org/SharedMailboxes/Public#Read-only_Maildirs

On 5.12.2012, at 9.21, Muhammad Yousuf Khan wrote:

> Thanks, i also notice that it is keep changing. but how could i manage
> that. because read only users are also unable to read emails. i just
> keep working on it for many days but no luck.
> 
> and my need is very simple. a public folder with 1 owner and everyone
> read only access. i don't know why it is not working.
> 
> 
> On Wed, Dec 5, 2012 at 11:21 AM, Timo Sirainen <tss at iki.fi> wrote:
>> Like it says, it's missing write permissions to /public/.News directory. Dovecot keeps recreating the dovecot-uidlist file so it's not enough to change only its permissions.
>> 
>> On 5.12.2012, at 7.31, Muhammad Yousuf Khan wrote:
>> 
>>> Please help. my error log is flooded with thousands of entries like this
>>> Dec  4 19:48:15 mailsrv dovecot: IMAP(testmail):
>>> file_dotlock_create(/public/.News/dovecot-uidlist) failed: Permission
>>> denied (euid=1002(testmail) egid=1002(testmail) missing +w perm:
>>> /public/.News)
>>> util i restart the service things back to normal. however this is not
>>> true. i have given 777 to dovecot-uidlist. and i dont know why this is
>>> keep generating. please help
>>> 
>>> On Tue, Dec 4, 2012 at 8:18 PM, Muhammad Yousuf Khan <sirtcp at gmail.com> wrote:
>>>> i finally manage to control access on public folder by File system permission.
>>>> i have 3 test users.
>>>> 
>>>> 1. tom
>>>> 2. fmaster
>>>> 3 . testmail
>>>> 
>>>> tom and fmaster are a group called "news-own" and testmail user is a
>>>> readonly one.
>>>> 
>>>> here is my folder structure ill share dovecot -n output at the end of
>>>> this email.
>>>> 
>>>> drwxrwxr-t 2 tom     news-own 4.0K Dec  4 19:08 tmp
>>>> drwxrwxr-t 2 tom     news-own 4.0K Dec  4 19:08 new
>>>> -rwxrwxrwx 1 tom     news-own   68 Dec  4 19:08 dovecot-uidlist
>>>> -rw-rw-r-T 1 fmaster news-own  16K Dec  4 19:10 dovecot.index.cache
>>>> drwxrwxr-t 2 tom     news-own 4.0K Dec  4 19:15 cur
>>>> -rw-rw-r-T 1 tom     news-own 1.1K Dec  4 19:16 dovecot.index.log
>>>> 
>>>> everything works fine as far as user fmaster and tom is concern as
>>>> they are member of "news-own" and this group own the mailbox now the
>>>> problem i face with readonly users.
>>>> 
>>>> i am getting this error in /var/log/mail.info (against user testmail)
>>>> 
>>>> file_dotlock_create(/public/.News/dovecot-uidlist) failed: Permission
>>>> denied (euid=1002(testmail) egid=1002(testmail) missing +w perm:
>>>> /public/.News
>>>> 
>>>> 
>>>> at first point i saw this error and i could not subscribe to the
>>>> folder. and the said log has been generated.
>>>> 
>>>> now on second stage i change the dovecot-uidlist file permission to
>>>> "1666"  so that testmail user can also write to the file.
>>>> 
>>>> now problem starts from here, i see two folder one is News and second
>>>> one is News-1 and i don't know from where the second folder showed up.
>>>> 
>>>> and when i click on any of the folder my /var/log/mail.info start to
>>>> show below massage continuously. until i restart the dovecot service.
>>>> 
>>>> file_dotlock_create(/public/.News/dovecot-uidlist) failed: Permission
>>>> denied (euid=1002(testmail) egid=1002(testmail) missing +w perm:
>>>> /public/.News
>>>> 
>>>> 
>>>> i search google and i saw that people suggested to set stickey bit on
>>>> which i already did or suggested to stop "dot locking"
>>>> 
>>>> so i am here to ask is there any way to solve my said problem with out
>>>> disabling dot locking?
>>>> 
>>>> or if i stop dot locking what are the consequences?
>>>> 
>>>> 
>>>> here i my dovcecot -n
>>>> 
>>>> 
>>>> root at mailsrv:/public/.News# dovecot -n
>>>> # 1.2.15: /etc/dovecot/dovecot.conf
>>>> # OS: Linux 2.6.32-5-amd64 x86_64 Debian 6.0.6
>>>> log_timestamp: %Y-%m-%d %H:%M:%S
>>>> ssl_cert_file: /etc/ssl/certs/postfix.pem
>>>> ssl_key_file: /etc/ssl/private/postfix.key
>>>> login_dir: /var/run/dovecot/login
>>>> login_executable: /usr/lib/dovecot/imap-login
>>>> mail_privileged_group: mail
>>>> mail_location: maildir:~/Maildir:INBOX=~/Maildir/:INDEX=~/Maildir/index
>>>> mail_debug: yes
>>>> mbox_write_locks: fcntl dotlock
>>>> namespace:
>>>> type: private
>>>> separator: /
>>>> inbox: yes
>>>> list: yes
>>>> subscriptions: yes
>>>> namespace:
>>>> type: public
>>>> separator: /
>>>> prefix: Shared folders/
>>>> location: maildir:/public
>>>> list: yes
>>>> auth default:
>>>> mechanisms: plain login
>>>> passdb:
>>>>   driver: pam
>>>> userdb:
>>>>   driver: passwd
>>>> socket:
>>>>   type: listen
>>>>   client:
>>>>     path: /var/spool/postfix/private/auth
>>>>     mode: 432
>>>>     user: postfix
>>>>     group: postfix
>>>> 
>>>> 
>>>> Thanks in advance, any help or suggestion would be highly appreciated.
>>> 
>> 
>