Valdi Dir Function

hsn=$(hostname);
vdr=valid_dir "/home/files/Dropbox";
if [ 0 eq $vdr ]; then
	echo "Valid Dir!";
	d_pth='/home/files/Dropbox/backups/${hsn}';
else
	echo "Invalid Dir!";
	d_pth="/data/Backups/$hsn";
fi

function valid_dir {
	DIR="$1"
	if [ $# -lt 1 ]; then
		return 3;
	elif [ ! -d "$DIR" ]; then
		return 4;
	else
		return 0;
	fi
}	# end funcion valid_dir