Quota warning executable can not log to /dev/stdout

[Michael Härtl]

Thanks, I've tried it.

Unfortunately it didn't help. The error message stays the same.


Am 28.10.2017 um 11:43 schrieb Aki Tuomi:
> Try adding
> 
> service quota-warning {
>    chroot =
> }
> 
> It won't chroot it then, but I'm not sure if that has a huge security impact.
> 
> Aki
> 
>> On October 28, 2017 at 12:13 PM Michael Härtl <haertl.mike at gmail.com> wrote:
>>
>>
>> I'm running dovecot 2.2.27 in a alpine based docker container and want
>> to log to /dev/stdout. I therefore added this setting:
>>
>>       log_path = /dev/stdout
>>
>> Logging works fine so far.
>>
>> Now I've added a quota-warning script. With the log_path setting above
>> the script creates warnings like:
>>
>> Oct 28 10:27:01 quota-warning: Error: Can't open log file /dev/stdout:
>> No such device or address
>> Oct 28 10:27:01 quota-warning: Fatal: master: service(quota-warning):
>> child 460 returned error 75
>>
>>
>> When I change log_path to something like /tmp/dovecot.log everything
>> works fine.
>>
>> Dovecot itself is started via s6 with a run script like this:
>>
>> #!/bin/sh
>> exec /usr/sbin/dovecot -F -c /etc/dovecot/dovecot.conf
>>
>>
>> What could cause this issue and how could I fix it?
>>
>>
>>
>> For the record here's my doveconf -n output:
>>
>>
>> # 2.2.27 (c0f36b0): /etc/dovecot/dovecot.conf
>> # OS: Linux 4.4.27-x86_64-jb1 x86_64  ext4
>> auth_mechanisms = plain login
>> auth_verbose = yes
>> first_valid_uid = 100
>> log_path = /dev/stdout
>> mail_gid = dovecot
>> mail_home = /var/mail/domains/%d/%n
>> mail_location = maildir:/var/mail/domains/%d/%n
>> mail_max_userip_connections = 160
>> mail_plugins = " quota"
>> mail_privileged_group = dovecot
>> mail_uid = vmail
>> managesieve_notify_capability = mailto
>> managesieve_sieve_capability = fileinto reject envelope
>> encoded-character vacation subaddress comparator-i;ascii-numeric
>> relational regex imap4flags copy include variables body enotify
>> environment mailbox date index ihave duplicate mime foreverypart extracttext
>> namespace inbox {
>>     inbox = yes
>>     location =
>>     mailbox Drafts {
>>       auto = subscribe
>>       special_use = \Drafts
>>     }
>>     mailbox Junk {
>>       auto = subscribe
>>       special_use = \Junk
>>     }
>>     mailbox Sent {
>>       auto = subscribe
>>       special_use = \Sent
>>     }
>>     mailbox "Sent Messages" {
>>       special_use = \Sent
>>     }
>>     mailbox Trash {
>>       auto = subscribe
>>       special_use = \Trash
>>     }
>>     prefix =
>>     separator = .
>> }
>> passdb {
>>     args = /etc/dovecot/dovecot-mysql.conf.ext
>>     driver = sql
>> }
>> plugin {
>>     quota = maildir:User quota
>>     quota_exceeded_message = Storage quota for user %u exceeded (Benutzer
>> %u hat sein Speichervolumen ueberschritten)
>>     quota_grace = 10%%
>>     quota_rule2 = Trash:storage=+100M
>>     quota_status_nouser = DUNNO
>>     quota_status_overquota = 552 5.2.2 Mailbox is full
>>     quota_status_success = DUNNO
>>     quota_warning = storage=85%% quota-warning 80 %u %d
>> }
>> protocols = imap lmtp sieve
>> service auth {
>>     unix_listener /var/spool/postfix/private/auth {
>>       group = postfix
>>       mode = 0666
>>       user = postfix
>>     }
>>     unix_listener auth-userdb {
>>       mode = 0777
>>     }
>> }
>> service lmtp {
>>     unix_listener /var/spool/postfix/private/dovecot-lmtp {
>>       group = postfix
>>       mode = 0600
>>       user = postfix
>>     }
>> }
>> service quota-status {
>>     client_limit = 1
>>     executable = quota-status -p postfix
>>     inet_listener {
>>       port = 10001
>>     }
>> }
>> service quota-warning {
>>     executable = script /usr/local/bin/quota-warning.sh
>>     group = dovecot
>>     unix_listener quota-warning {
>>       mode = 0666
>>       user = dovecot
>>     }
>>     user = vmail
>> }
>> ssl_cert = </certs/fullchain.pem
>> ssl_key =  # hidden, use -P to show it
>> ssl_protocols = !SSLv2 !SSLv3
>> userdb {
>>     args = /etc/dovecot/dovecot-mysql.conf.ext
>>     driver = sql
>> }
>> protocol imap {
>>     mail_plugins = " quota imap_quota"
>> }
>> protocol lmtp {
>>     mail_plugins = " quota sieve"
>> }