Shell Programming and Scripting

#!/bin/sh

DIR=~/'unix.com'
dir_size=0;

get_size(){ du -s "$1" 2>/dev/null | awk '$0=$1';}

while [ : ]; do
	# Script does its stuff
	sleep 5
	while [ "$(get_size "$DIR")" -ne "$dir_size" ]; do
		dir_size=$(get_size "$DIR")
		sleep 5
	done
	echo "Size has not changed since the last 5 seconds. Loop to the top"
done

exit 0

#!/bin/sh

DIR=~/'unix.com'

get_size(){ du -s "$1" 2>/dev/null | awk '$0=$1';sleep 5;}

# Script does its stuff

dir_size=$(get_size "$DIR")
while [ "$(get_size "$DIR")" -ne "$dir_size" ]; do
	echo 'Size has changed. Sleeping for 5 more seconds'
	dir_size=$(get_size "$DIR")
done

echo 'Size has not changed since the last 5 seconds.'

#Do other stuff

exit 0