[Clamav-users] [OT] Watchdog for freshclam

[Jorge Valdes]

I had a problem with freshclam, I run it in daemon mode and for some reason 
it died. A couple of days passed before I realized this, and restarted 
it.  This by itself its not that bad, although my virus signatures were out 
of date. :(

<plug>
I recently came across monit, a daemon that watches and optionally restarts 
user configured processes (http://www.tildeslash.com/monit/) which did the 
trick for me.
</plug>

I have the following init script to start freshclam at boottime (please 
lookout for line-wrap):

--BEGIN--
#!/bin/sh
#
# freshclam     This shell script takes care of starting and stopping
#               freshclam daemon
#
# chkconfig: 345 26 74
# description: freshclam updates ClamAV databases
# Source function library.
. /etc/init.d/functions
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0
RETVAL=0
OPTIONS="-d"
prog="freshclam"
pidfile="/var/run/freshclam.pid"
PATH=$PATH:/usr/local/bin
[ -x /usr/local/bin/freshclam ] || exit 0

start() {
        # Start daemon.
        echo -n $"Starting $prog: "
        daemon $prog $OPTIONS
        RETVAL=$?
        echo
        [ $RETVAL -eq 0 ] && touch /var/lock/subsys/$prog
        [ $RETVAL -eq 0 ] && ps -eo pid,args |grep "$prog $OPTIONS" |awk 
'{print $1}' > $pidfile
        return $RETVAL
}

stop() {
        # Stop daemons.
        echo -n $"Shutting down $prog: "
        killproc $prog
        RETVAL=$?
        echo
        [ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/$prog
        [ $RETVAL -eq 0 ] && rm -f $pidfile
        return $RETVAL
}
# See how we were called.
case "$1" in
  start)
        start
        ;;
  stop)
        stop
        ;;
  status)
        status $prog
        RETVAL=$?
        ;;
  restart|reload)
        stop
        start
        RETVAL=$?
        ;;
  condrestart)
        if [ -f /var/lock/subsys/$prog ]; then
            stop
            start
            RETVAL=$?
        fi
        ;;
  *)
        echo $"Usage: $0 {start|stop|restart|condrestart|status}"
        exit 1
esac
exit $RETVAL
--END--
Using this, I add the following configuration to monit:

--BEGIN--
# MONIT
check process freshclam
   with pidfile /var/run/freshclam.pid
   start program "/etc/init.d/freshclam start"
   stop  program "/etc/init.d/freshclam stop"
--END--
With this program, if the daemon dies, it is restarted automatically by the 
system and I get a mail message notifying me that the daemon was restarted.

--
Jorge Valdes
Intercom El Salvador


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