#!/bin/bash

sum=0
directory="."

ddsum()
{
    echo "DDD $directory"
    ff=$(ls $directory)
    local adirectory=$directory
for file in $ff
do
    echo "$file"
    if [ -f "$file" ]
    then
	set -- $(ls -l $file) # set into the positional parameters
	sum=$((sum + $5)) # fifth element on ls -l line is size
    fi
    if [ -d $file ]
    then
	echo "DDIIRR "
	directory="$adirectory/$file"
	ddsum
    fi
done    
}


ddsum
echo "$sum"