#!/bin/sh

if [ $# -ne 4 ]; then
    echo "Usage: ${0##*/} PDFFILE FIRSTPAGE LASTPAGE DESTFILE"
    echo "Extract a range of pages from a PDF."
	exit
fi

if [ ! -f "$1" ]; then
	echo "$1 is not a valid PDF file!"
fi

gs -sDEVICE=pdfwrite -dNOPAUSE -dSAFER -dSAFER -dFirstPage=$2 -dBATCH -dLastPage=$3 -sOutputFile="$4" "$1"