post_install() {
    # lpr
    /opt/brother/Printers/dcp365cn/inf/setupPrintcapij dcp365cn -i
    
    # cupswrapper
    /opt/brother/Printers/dcp365cn/cupswrapper/cupswrapperdcp365cn
    
    systemctl restart cups.service
}

post_upgrade() {
    /bin/true
}

pre_remove() {
    # lpr
    /opt/brother/Printers/dcp365cn/inf/setupPrintcapij dcp365cn -e
    
    # cupswrapper
    /opt/brother/Printers/dcp365cn/cupswrapper/cupswrapperdcp365cn -e
}

op=$1
shift

$op "$@"