#!/bin/sh
set -ex
[ "$(wc -c $1 | awk '{print $1}')" -le $3 ] && exit 0
for i in $(seq 100 -1 0); do
cat $1 | pngquant --quality 0-$i - > $2
[ "$(wc -c $2 | awk '{print $1}')" -le $3 ] && exit 0
done
rm $2
exit 1