post_install() {
    _cups_path1=/usr/share/ppd
    _cups_path2=/usr/share/cups/model
    ppd_files="canone480.ppd canonip110.ppd canonmg6600.ppd canonmx490.ppd canone460.ppd canonmg7500.ppd canonmb5300.ppd canonmg5600.ppd canonmb2300.ppd canonmg2900.ppd canonmb5000.ppd canonmb2000.ppd canonib4000.ppd "

    if [ -x /sbin/ldconfig ]; then
        /sbin/ldconfig
    fi
    # make symbolic link for ppd
    if [ ! -d ${_cups_path2} ]; then
        mkdir ${_cups_path2}
    fi
    for f in ${ppd_files}; do
        ln -fs ${_cups_path1}/${f} ${_cups_path2}/${f}
    done
    systemctl restart org.cups.cupsd.service

    echo "Successfully installed.  Visit http://localhost:631/ to configure printers using CUPS."
}

post_upgrade() {
    post_install
}