antispam plugin, pipe backend, how to make it work?

[J. Echter]

dovecot 2.2.10

Am 12.04.2016 um 20:18 schrieb J. Echter:
> Hi,
> 
> here (Centos 7) its already integrated...
> 
> Just add something like this:
> 
> plugin {
> 
> 
>   antispam_mail_sendmail = /usr/bin/sa-learn
>   antispam_mail_sendmail_args = -u amavis
>   antispam_mail_spam  = --spam
>   antispam_mail_notspam  = --ham
> }
> 
> to dovecot.conf
> 
> Cheers
> 
> Jürgen
> 
> Am 12.04.2016 um 20:14 schrieb Johannes Rohr:
>>     Hi, my setup is a dovecot 2.0.19 IMAP server on Ubuntu Precise with
>> the antispam plugin in version  2.0+20120225-2 and spamassassin at
>> version 3.2.2
>>
>> I have been trying and failed to get the pipe backend of the antispam
>> plugin to work. Spamassin by itself works, a manual call of sa-learn
>> works fine. Bayes data is stored in a mysql DB.
>>
>> I have the following configuration in /etc/dovecot/conf.d/90-plugin.conf
>>
>> plugin {
>>   #setting_name = value
>>   sieve=~/.dovecot.sieve
>>   sieve_dir=~/sieve
>>     antispam_pipe_program_spam_arg = --spam
>>     antispam_pipe_program_notspam_arg  = --ham
>>     antispam_pipe_program = /usr/local/bin/sa-learn-pipe.sh
>>     antispam_pipe_program_args = --username=%u # % expansion done by
>> dovecot
>>     antispam_trash = trash;Trash;Deleted Items;Deleted Messages
>>     antispam_spam = SPAM;Junk
>>     antispam_backend = pipe
>>     antispam_verbose_debug = 1
>>     antispam_debug_target = syslog
>>     antispam_pipe_tmpdir = /tmp
>> }
>>
>> I have tried the following wrapper script:
>> #!/bin/bash
>> # set -x
>> LOGFILE=/tmp/sa-learn-pipe.log
>> echo "$$-start ($*)" >> $LOGFILE
>> #echo $* > /tmp/sendmail-parms.txt
>> cat<&0 >> /tmp/sendmail-msg-$$.txt
>> /usr/bin/sa-learn $* -D /tmp/sendmail-msg-$$.txt >> $LOGFILE 2>&1 && \
>> rm -f /tmp/sendmail-msg-$$.txt
>> echo "$$-end" >> $LOGFILE
>> exit 0
>>
>> It somehow isn't working. I can call the wrapper script manually e.g.
>> sudo -u vmail /usr/local/bin/sa-learn-pipe.sh --username=some at mail.user
>> --ham \
>> < someham
>>
>> But it doesn't work from dovecot. It seems the script is called. but no
>> new patterns show up in the bayes DB. Unfortunately, the plugin seems to
>> be documented poorly. How does it call the programme it pipes to? Is it
>> something like $programme --par1 --par2 < message ? Why can't /
>> shouldn't I call sa-learn directly? All the instructions I found on the
>> in internet contained a wrapper script, but none bothered to explain why
>> you would actually need it.
>>
>> I would be very grateful, if someone could enlighten me on that...
>>
>> Cheers,
>>
>> Johannes