[Dovecot] dotlock error

[Muhammad Yousuf Khan]

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.