core/cups/cups.install

add_daemon() {
  checkdmn=$(grep ^DAEMONS /etc/rc.conf | grep cups)
  if [ "$checkdmn" = "" ]; then
    sed -i '/^DAEMONS/{s/)$/ cups)/}' /etc/rc.conf
  fi
}

post_install() {
  xdg-icon-resource forceupdate --theme hicolor 2> /dev/null
  echo ">> If you use an HTTPS connection to CUPS, the first time you access"
  echo ">> the interface it may take a very long time before the site comes up."
  echo ">> This is because the first request triggers the generation of the CUPS"
  echo ">> SSL certificates which can be a very time-consuming job."
  add_daemon
  /etc/rc.d/cups restart
}

post_upgrade() {
  xdg-icon-resource forceupdate --theme hicolor 2> /dev/null
  add_daemon
  /etc/rc.d/cups restart
}

pre_remove() {
  /etc/rc.d/cups stop
}

post_remove() {
  xdg-icon-resource forceupdate --theme hicolor 2> /dev/null
  sed -i '/^DAEMONS/{s/ cups)$/)/}' /etc/rc.conf
}