post_install() {
  INSEXTRAFAIL=0
  { udevadm control --reload-rules && udevadm trigger; } || INSEXTRAFAIL=1
  sleep 1
  modprobe uinput || INSEXTRAFAIL=1
  if [ -e /dev/uinput ]
    then chmod 660 /dev/uinput || INSEXTRAFAIL=1
         chown root:input /dev/uinput || INSEXTRAFAIL=1
         touch /dev/uinput
         sleep 0.25
         UISTAT=$(stat -c %a /dev/uinput)
         if [ $UISTAT == "600" ]
           then INSEXTRAFAIL=1
         fi
    else INSEXTRAFAIL=1
  fi
  echo "add yourself to the input group in order to be able to use the program:"
  echo "sudo usermod -a -G input <username>"
  echo "then re-login."

  if [ $INSEXTRAFAIL -eq 1 ]
    then echo "additionally, you may have to reboot... :("
  fi
}