#!/bin/sh

set -- "${1:-fd.img}"
[ -s "$1" ] && for i in 1228800 1474560 1638400 1720320 1966080 2949120 3932160 737280 819200 ; do
	mkdir $i 2> /dev/null
	cd $i
	split -b $i "../$1"
	n=0
	for j in * ; do
		fill=$(($i - $(stat -c %s $j)))
		[ $fill -ne 0 ] && dd if=/dev/zero bs=1 count=$fill conv=sync >> $j
		n=$((n+1))
		mv $j $(printf "fd%03d.img" $n)
	done
	md5sum fd* > md5sum
	rm fd*
	cd ..
done