PREUN

/bin/sh

/usr/share/rpm-helper/del-service dhcp $1 dhcrelay

POSTIN

/bin/sh

/usr/share/rpm-helper/add-service dhcp $1 dhcrelay

POSTUN

/bin/sh

if [ "$1" -ge "1" ]; then
    /sbin/service dhcrelay condrestart >/dev/null 2>&1
fi