pagestamp.sh

#!/bin/bash
input="$1"
count=$2
blank=$((count - 1))
output="${1%.pdf}-header.pdf"
pagenum=$(pdftk "$input" dump_data | grep "NumberOfPages" | cut -d":" -f2)
(for i in $(seq "$blank"); do echo; done) | enscript -L1 -B --output - | ps2pdf - > /tmp/pa$$.pdf
(for i in $(seq "$pagenum"); do echo; done) | enscript -a ${count}- -L1 -F Helvetica@10 --header='||Page $% of $=' --output - | ps2pdf - > /tmp/pb$$.pdf
pdfjoin --paper letter --outfile /tmp/join$$.pdf /tmp/pa$$.pdf /tmp/pb$$.pdf &>/dev/null
cat /tmp/join$$.pdf | pdftk "$input" multistamp - output "$output"
rm /tmp/pa$$.pdf
rm /tmp/pb$$.pdf
rm /tmp/join$$.pdf