PREIN

/bin/sh

/usr/share/rpm-helper/add-user clamav $1 clamav /var/lib/clamav /bin/sh 

if ! [ -z "`getent group amavis`" ]; then
    gpasswd -a clamav amavis
fi

PREUN

/bin/sh

/usr/share/rpm-helper/del-service clamav $1 freshclam

POSTIN

/bin/sh

/usr/share/rpm-helper/add-service clamav $1 freshclam 
/usr/share/rpm-helper/create-file clamav $1 /var/log/clamav/freshclam.log clamav clamav 0644