cookies_cleaner.sh

#!/bin/bash

#[ -n $1 ] || exit 1

file=$1
timestamp=`date +%s`

sed '/__utm./d' -i $file
IFS="
"
tmp=`mktemp`

for x in `cat $file`
do
    t=`echo $x|awk '{ print $5 }'|sed -n 's/^\([[:blank:]]*[0-9]\+[[:blank:]]*\)$/\1/p'` 
    if [ -z "$t" -o $((t-timestamp)) -gt 0 ]
    then 
        echo $x >> $tmp
    fi
done

cp $tmp $file
rm $tmp