#!/bin/bash

filename=$1

start=`awk '/\# update-system start/{print NR}' $filename`

end=`awk '/\# update-system stop/{print NR}' $filename`

echo "$start, $end"

if [ "$start" != "" -o "$end" != "" ];
then

	if [ 1 -eq 1 ]
	then
		num=`expr $end - $start + 1`

		while true
		do
			sed ''$start'd' -i $filename
			num=`expr $num - 1 `
			if [ $num -eq 0 ]
			then
				break
			fi
		done
	fi
fi
