test script

#!/system/bin/sh
if [ ! -f recovery.img ]; then
        echo "Usage: recovery-updater [imagefile]\n"
        exit 0
fi
wc -c recovery.img |
awk '{print [ $1 ]}' |
xargs printf "0: %.8x" $1 |
sed -e 's/0\: \(..\)\(..\)\(..\)\(..\)/\4\3\2\1/;s/../\\x&/g' |
xargs -0 echo -ne $1