#!/bin/bash

uploaddir='/var/www/html/files';
timeout=30

list=`ls ${uploaddir}`

for file in ${list}
do
	prefix=`echo ${file} | awk -F '-' '{ print $1}'`
	stamp=`date +%s`
	delta=`expr ${stamp} - ${prefix}`
	
	if [[ "$delta" -gt "$timeout"  ]]
	then
	   rm -f "${uploaddir}/${file}"
	fi
done