[Dovecot] dotlock error

[Timo Sirainen]

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.
>