#!/bin/bash

if [ "${1}" ]
 then
 NUM=0
 COUNT=0
 for N in `s3ls ${1} | awk '{print $11}' | grep [0-9]`
  do 
   NUM=`expr $NUM + $N`
   ((COUNT++))
  done
  KB=`expr ${NUM} / 1024`
  MB=`expr ${NUM} / 1048576`
  GB=`expr ${NUM} / 1073741824`
  echo "${COUNT} files in bucket ${1}"
  echo "${NUM} B"
  echo "${KB} KB"
  echo "${MB} MB"
  echo "${GB} GB"
else
 echo "Usage : ${0} s3-bucket"
 exit 1
fi