#!/usr/bin/env zsh
actualSize=$(wc -c < $1)

for (( size = 0; size < actualSize; size++ )); do
	head -c$size $1 | env -i HOME=$HOME/test zsh 2>/dev/null
	if [[ -d $HOME/test ]]; then
		percent=$(( size * 100 / actualSize ))
		echo "dots still ran with only $size bytes available, " \
			"$percent% of its full $actualSize bytes!" 2>/dev/null
		exit $size
	fi
done