md5sum_directory

#!/bin/bash
if [ $# -ne 1 ] ; then
        echo "Usage $0 [directory]"
        exit 1
fi

echo "Generating new md5 sums!"
find $1 -type f ! -iname "*.md5" -print0 | while IFS= read -r -d $'\0' file; do
        (
        cd "$(dirname "$file")"
        filename="$(basename "$file")"
        if [ ! -e "$filename.md5" ]; then
                md5sum "$filename" > "$filename".md5
                if [ -e "$filename.md5" ]; then
                        echo "md5 for $filename generated!"
                fi
        else echo "md5 for $filename already exists!"
        fi
        )
done