#!/usr/bin/bash

dBase="$( mktemp -d )"
for (( u = 0 ; u <= "$( ulimit -n )" ; u++ )) ; do
	mkdir "$dBase/$u"
	touch "$dBase/$u/empty"
done

if true ; then

	a=()

	while read d ; do
		while read p ; do
			echo "$p"
		done < <( find "$d" -type f )
	done < <( find "$dBase" -mindepth 1 -type d )

fi