post_install() {

    getent group gpib || groupadd -r gpib
    udevadm control --reload-rules 2>/dev/null

    cat << EOF
===> You must load gpib modules manually before starting gpib_config
===> For example:
===> # modprobe ni_usb_gpib
EOF
}

post_upgrade() {
    echo 'In order to use the new version, reload all gpib modules manually.'
}

post_remove() {
    groupdel gpib >/dev/null 2>&1 || true
}