function expandfs () {
  checkrpi
  checkroot
  checkargn $# 0
  # expandfs is way too complex, it should be handled by raspi-config
  raspi-config --expand-rootfs >"$LOGFILE" 2>"$LOGFILE"
  echo "Success: the filesystem will be expanded on the next reboot"
}

function expandfs_help {
  echo
  echo "Usage: $BASENAME expandfs"
  echo
  echo "Expands the partition of the raspberry pi image to use the whole disk"
  echo
  echo "Example:"
  echo "  $BASENAME expandfs"
  echo "      The partition of the SD card in which the raspberry pi image is stored will be expanded to match the available space on the SD card after a reboot"
  echo
}