for blkdev in $(find /sys/block -name dev | grep -v loop | grep -v ram | grep -v fd); do
  unset FSTYPE
  rm -f /tmp/initcpio_dev
  mknod /tmp/initcpio_dev b $(/usr/lib/klibc/bin/replace $(cat ${blkdev}) ':')
  eval $(/usr/lib/klibc/bin/fstype 2>/dev/null < /tmp/initcpio_dev)
  if [ -n "$FSTYPE" -a "$FSTYPE" != "swap" -a "$FSTYPE" != "unknown" -a "$FSTYPE" != "luks" -a "$FSTYPE" != "lvm2" ]; then
    # do stuff
    echo $FSTYPE
  fi
done
rm -f /tmp/initcpio_dev