Script to delete old files from amazon s3

s3deleteold.sh

#!/bin/bash
# Usage: ./deleteOld "bucketname" "30 days"
s3cmd ls $1 | while read -r line;  do

createDate=`echo $line|awk {'print $1" "$2'}`
createDate=`date -d"$createDate" +%s`
olderThan=`date -d"-$2" +%s`
if [[ $createDate -lt $olderThan ]]
  then
    fileName=`echo $line|awk {'print $4'}`
    echo $fileName
    if [[ $fileName != "" ]]
      then
        s3cmd del "$fileName"
    fi
fi
done;