s4-piper can‘t be executed success on cygwin

there is something wrong with script incubator-s4\subprojects\s4-tools\build\install\s4-tools\bin\s4-tools run on cygwin,I have modify the script :
1.at line 68 script must be "CLASSPATH=$APP_HOME/lib" not "CLASSPATH=$APP_HOME/lib/lib"
2.after line 161,I add script
if $cygwin; then
TMP=''
for jar in `ls $CLASSPATH/*.jar`
do
TMP="$TMP;$jar"
done
CLASSPATH=$TMP
fi
for parsing CLASSPATH