Creating dynamically a CLASSPATH in Unix

buildClassPath() {
jar_dir=$1
if [ $# -ne 1 ]; then
echo "Jar directory must be specified."
exit 1
fi
class_path=
c=1
for i in `ls $jar_dir/*.jar`
do
if [ "$c" -eq "1" ]; then
class_path=${i}
c=2
else
class_path=${class_path}:${i}
fi
done
echo $class_path
#return $class_path
}


CP=`buildClassPath /data/software/cruisecontrol-bin-2.8.2/lib`