olddir=$PWD
: ${TMPDIR:=/var/tmp}

SCRATCH=${TMPDIR}/scratch-$$
rm -rf $SCRATCH
mkdir $SCRATCH || exit 1

cd $SCRATCH

mkdir a b
touch a/aa a/ab
touch b/bb b/bc

ln -s a c

shopt -s globstar

echo **
echo **/

echo **/*b

cd "$olddir"
rm -rf $SCRATCH