#!/bin/bash

DIR="$1"

# If No Param, finding directory is current dir.
if [ ! "$1"  ];
then

        DIR="."

fi

# Check directory
if [ -d $DIR ];
then

        for FILE_NAME in `find $DIR -type f`
        do

				# Cannot read file, display error to error output.
                if [ -r "$FILE_NAME" ];
                then

                        FILE_SIZE=`du "$FILE_NAME" | awk '{print $1}'`
                        FILE_MD5=`md5sum -b "$FILE_NAME"`

                        echo "$FILE_SIZE $FILE_MD5"
                else

                        echo "Error: Cannot read $FILE_NAME" 1>&2

                fi

        done


else

        echo "$0 [directory]"

fi