#!/bin/bash

opkg update

echo "############################################################################"
opkg list-upgradable
echo "############################################################################"
echo
echo "Upgrade ? [Y/n]"

read a

if [[ $a == "Y" ]]; then
    echo "Upgrade in progress ..."
    opkg list-upgradable | sed -e "s/\s.*//" | while read PKG_NAME; do opkg upgrade "${PKG_NAME}"; done
fi