#!/bin/bash
# ExtractPdfPages.sh
# Invoke this script in the same directory as the source PDF files.
# Extracts PDF pages.

for file in *.pdf; do
   test -e "$file" || continue
   echo 'Processing '"$file"
   read -r -p'Enter first page to extract: ' fpg
   read -r -p'Enter last page to extract: ' lpg
   test $fpg -lt 1 && fpg=1
   pgs=$(qpdf --show-npages "$file")
   test $lpg -gt $pgs && lpg=$pgs
   test -n "$fpg" && test -n "$lpg" && fpg=$fpg-
   qpdf "$file" --pages . $fpg$lpg -- "${file%.*}!.pdf"
done

echo -en '\a'
read -rs -n1 -t60 -p'Ctrl+C to exit or any key to pause!' || { echo; exit;}
echo -en '\r\aPress Ctrl+C to exit permanent hold!'
sleep infinity