exit 1
fi
-REL1=${1#/}
-REL2=${2#/}
+# get the real absolute path, derefencing symlinks
+ABS1=$(readlink -f $1)
+ABS2=$(readlink -f $2)
+
+# remove leading slash
+REL1=${ABS1#/}
+REL2=${ABS2#/}
left1=${REL1%%/*}
right1=${REL1#*/}
prev_right2=$REL2
prev_left2=
+prefix=
+
while [ "${right1}" != "" -a "${right2}" != "" ]; do
if [ "$left1" != "$left2" ]; then