PDF optimization script

pdfoptimize.sh

for f in "$@"
do
	TMP=$(mktemp)
	SIZE_OLD=$(wc -c < "$f")
	echo "Optimizing '$f' of size $SIZE_OLD"
	/usr/bin/gs \
	-sDEVICE=pdfwrite \
	-dCompatibilityLevel=1.4 \
	-dPDFSETTINGS=/ebook \
	-dNOPAUSE \
	-dBATCH \
	-dQUIET \
	-sOutputFile="$TMP" \
	"$f"
	SIZE_NEW=$(wc -c < "$TMP")
	if [ $(echo "$SIZE_NEW > $SIZE_OLD" | bc) = "1" ]
	then
		echo "New size ($SIZE_NEW) is bigger, skipping"
		rm "$TMP"
	else
		echo "New size: $SIZE_NEW"
		mv "$f" "$f".bak
		mv "$TMP" "$f"
	fi
	
done