Johannes -
I'm running 2.2.9 under Ubuntu 14.04. I gave up on using the pipe
backend, just could not get the damn thing to work. I would up using
spool2dir and incron, which works perfectly. The issue was that
sa-learn would cause a pthread_cancel error with libgcc_s.so.1
Below is an excerpt from my install script :
############################################
# Enable antispam - Damn, not working right with pipe backend
# now using spool2dir and incron
if [ -e /etc/spamassassin ]; then
sed -i "
s/^ #mail_plugins.*/ mail_plugins = \$mail_plugins antispam
${DOVENOTIFY}/
s/^ #mail_max_userip.*/mail_max_userip_connections = 20/
" /etc/dovecot/conf.d/20-imap.conf
cat > /etc/dovecot/conf.d/99-Installerbox-antispam.conf << EOF
##
## antispam configuration
##
plugin {
antispam_debug_target = syslog
# antispam_verbose_debug = 1
antispam_trash_pattern = Trash;Deleted *
antispam_spam = Junk;Spam
antispam_backend = spool2dir
antispam_spool2dir_spam =
/var/cache/dovecot-antispam/spam/%%020lu-%u-%%05luS
antispam_spool2dir_notspam =
/var/cache/dovecot-antispam/ham/%%020lu-%u-%%05luH
# pipe backend not working with sa-learn - causes pthread_cancel error
with libgcc_s.so.1
# antispam_backend = pipe
# antispam_pipe_program = /usr/local/bin/sa-learn-pipe.sh
# antispam_pipe_program_args = --for;%u
# antispam_pipe_program_spam_arg = --spam
# antispam_pipe_program_notspam_arg = --ham
# antispam_pipe_tmpdir = /tmp
}
EOF
# incron watches the spam/ham spool dirs, calls sa-learn-pipe.sh to
handle
echo "root" >> /etc/incron.allow
mkdir -p /var/cache/dovecot-antispam/spam
/var/cache/dovecot-antispam/ham
chown -R ${VMAIL_ID}.dovecot /var/cache/dovecot-antispam/
cat > /var/spool/incron/root << "EOF"
/var/cache/dovecot-antispam/spam IN_CLOSE_WRITE
/usr/local/bin/sa-learn-pipe.sh --spam
/var/cache/dovecot-antispam/spam/$#
/var/cache/dovecot-antispam/ham IN_CLOSE_WRITE
/usr/local/bin/sa-learn-pipe.sh --ham /var/cache/dovecot-antispam/ham/$#
EOF
chgrp incron /var/spool/incron/root
chmod 600 /var/spool/incron/root
# inotify needs a little more room to breath - default of 128 too
low
cat > /etc/sysctl.d/60-inotify.conf << EOF
# inotify changes for Dovecot
# http://dovecot.org/list/dovecot/2011-March/058300.html
# Defaults are
# fs.inotify.max_queued_events = 16384
# fs.inotify.max_user_instances = 128
# fs.inotify.max_user_watches = 8192
fs.inotify.max_user_instances = 2048
EOF
# spamassassin learning script
cat > /usr/local/bin/sa-learn-pipe.sh << "EOFSPAM"
#!/bin/bash
# Pipe script to learn/unlearn single email file
# Set to read from file or from stdin
# From stdin to accomodate dovecot-antispam pipe backend (nor currently
working)
# echo /usr/bin/sa-learn $* /tmp/sendmail-msg-$$.txt
FILE=`echo $* | sed "s/^.* //"`
echo "$$-start ($*)" >> /var/log/sa-learn-pipe.log
echo -n "$$ " >> /var/log/sa-learn-pipe.log
egrep --no-filename "^Subject: " /tmp/sendmail-msg-$$.txt ${FILE} | head
-1 >> /var/log/sa-learn-pipe.log
cat<&0 >> /tmp/sendmail-msg-$$.txt
/usr/bin/sa-learn --progress $* /tmp/sendmail-msg-$$.txt >>
/tmp/sa-learn-pipe.$$.log 2>&1
echo $$ sa-learn rc=$? id=$(id) HOME=$HOME >> /var/log/sa-learn-pipe.log
while read line; do
echo $$-sa-learn "$line" >> /var/log/sa-learn-pipe.log
done < /tmp/sa-learn-pipe.$$.log
rm -f /tmp/sendmail-msg-$$.txt /tmp/sa-learn-pipe.$$.log
rm -f ${FILE}
echo "$$-end" >> /var/log/sa-learn-pipe.log
exit 0
EOFSPAM
chmod 755 /usr/local/bin/sa-learn-pipe.sh
touch /var/log/sa-learn-pipe.log
chown ${VMAIL_ID}.dovecot /var/log/sa-learn-pipe.log
chmod 660 /var/log/sa-learn-pipe.log
cat > /etc/logrotate.d/sa-learn-pipe.log << EOFLOG
/var/log/sa-learn-pipe.log {
daily
missingok
rotate 10
compress
delaycompress
notifempty
create 660 ${VMAIL_ID} dovecot
}
EOFLOG
fi # spamassassin
############################################
On 2016-04-12 14:14, Johannes Rohr wrote:
Hi, my setup is a dovecot 2.0.19 IMAP server on Ubuntu Precise with
the antispam plugin in version 2.0+20120225-2 and spamassassin at
version 3.2.2
I have been trying and failed to get the pipe backend of the antispam
plugin to work. Spamassin by itself works, a manual call of sa-learn
works fine. Bayes data is stored in a mysql DB.
I have the following configuration in
/etc/dovecot/conf.d/90-plugin.conf
plugin {
#setting_name = value
sieve=~/.dovecot.sieve
sieve_dir=~/sieve
antispam_pipe_program_spam_arg = --spam
antispam_pipe_program_notspam_arg = --ham
antispam_pipe_program = /usr/local/bin/sa-learn-pipe.sh
antispam_pipe_program_args = --username=%u # % expansion done by
dovecot
antispam_trash = trash;Trash;Deleted Items;Deleted Messages
antispam_spam = SPAM;Junk
antispam_backend = pipe
antispam_verbose_debug = 1
antispam_debug_target = syslog
antispam_pipe_tmpdir = /tmp
}
I have tried the following wrapper script:
#!/bin/bash
# set -x
LOGFILE=/tmp/sa-learn-pipe.log
echo "$$-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=s...@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...
--
Dean Carpenter
deano is at areyes dot com
203 six oh four 6644
