#!/usr/bin/ksh
# Function	: Add up the disk space in a directory
if [ $# -ne 1 ];then
	echo "Usage: `basename $0` <directory name>"
elif [ ! -d $1 ];then
	echo "$1 is not a directory"
else
	TOTAL=0
	FILE_COUNT=0
	ls -l $1 | grep -v ^d | sed '1d' | tr -s ' '| cut -s -f5 -d' ' | while read SIZE
	do
	  TOTAL=$(($SIZE+$TOTAL))
	  FILE_COUNT=$(($FILE_COUNT+1))
	done
	echo "$FILE_COUNT files are using ${TOTAL}"
fi