#!/bin/bash
#
# Syntax:  pdf_extract_pages [-h] range pdf_file
#
# Purpose: Use pdftk to extract pages from a pdf file.
#          Page ranges can be specified as X-Y, X-end, X-Yeven,
#          X-Yodd, or as "X Y Z" (note the quotes!).
#          Output is stored in the file pdf_file_pages.pdf
#          Note: If pdftk is not installed or not available, 
#                pdf_extract_pages_gs can be used instead.
#
# See also: pdf_extract_pages_gs

# Created: Jan  8, 2007       by Bart De Schutter
# Last revised: Jan 11, 2011  by Bart De Schutter
#
# See http://www.deschutter.info/util/scripts.html for the latest version of
# this script.

# Status: public
# Category: pdf

if [  $# -ge 1   -a   "$1" = "-h"  ];
then
   sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
   exit 1
fi

if [ $# -ne 2 ];
then
   echo >&2
   echo >&2 "ERROR: ${0##*/} requires exactly 2 input arguments."
   echo >&2
   sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
   exit 1
fi

pdf_file="$2"
if [ ! -e "$pdf_file" ];
then
   echo >&2
   echo >&2 "ERROR: File $pdf_file not found."
   echo >&2
   sed '/^$/q;/^#!/d;s/^# //;s/^#//' $0 >&2
   exit 1
fi

pdftk "$2" cat $1 output "${pdf_file%.pdf}_pages.pdf"