source: npl/mailserver/clamav_conf/syn3-clamav

#!/bin/bash

#SYN-3 clamav updater and monitoring
#(C)2010 DatuX

OUTPUT=/tmp/syn3clam.$$
trap "rm '$OUTPUT'" 0

#update scanner
freshclam &> $OUTPUT
EXIT=$?

#update when ok?
if grep -v 'Clamd was NOT notified' $OUTPUT | grep "^WARNING: " >/dev/null; then
    MSG="`grep '^WARNING: ' $OUTPUT`"
elif [ "$EXIT" != "0" ] && [ "$EXIT" != "1" ]; then
    MSG="Error while updating virus scanner."
fi

#create test virus
cat /usr/share/clamav/eicar.com.1 /usr/share/clamav/eicar.com.2 > /tmp/clamavtest
chmod 555 /tmp/clamavtest

#use deamon or not?
if netstat -na|grep /var/run/clamav/clamd >/dev/null; then
    CLAM=clamdscan
else
    CLAM=clamscan
fi

#test scanner
if $CLAM /bin/bash /tmp/clamavtest | grep -x 'Infected files: 1' >/dev/null; then
        syn3-state clamav OK "Virus scanner self-test was OK. $MSG"
else
        syn3-state clamav CAUTION "Virus scanner self-test failed. $MSG"
fi

rm /tmp/clamavtest