#!/bin/bash
if [ $# -ne 1 ] ; then
        echo "Usage $0 [directory]" 
        exit 1
fi
find $1 -type f  -print0 | while IFS= read -r -d $'\0' file; do
    (
    cd "$(dirname "$file")"
    filename="$(basename "$file")"
    md5sum "$filename" > "$filename".md5
    )
done