Show admin symbol in cygwin

bash/rbashrc

@@ -290,7 +290,17 @@ function r2dissource {
 	rm -r "$_dis" "$RBASH_SOURCES"
 }
 
-export PS1="This is ${RHOSTNAME}\e[1;3${RCOLOR}m${RDOMAIN}\e[0m: \w\n\$ "
+_SHELLD="\$"
+case $OSTYPE in
+	cygwin)
+		net session > /dev/null 2>&1
+		if [ $? -eq 0 ]; then
+			_SHELLD="#"
+		fi
+		;;
+esac
+
+export PS1="This is ${RHOSTNAME}\e[1;3${RCOLOR}m${RDOMAIN}\e[0m: \w\n$_SHELLD "
 export EDITOR=vim
 export PATH="$RBASH_BIN:$PATH"