sigpgs.sh

#!/bin/bash

label="SigPage" # To be inserted between filename and indices
npg=$(wc -l < "$2") # Count the number of signatories
spg=$3 # Read the page number where signature pages begin
epg=$(expr $spg + $npg - 1)
filename=$(basename "$1" .pdf) # Get filename sans extension

# Split PDF into separate & numbered pages
cd "$(dirname "$1")"
mkdir "$filename"
qpdf --split-pages "$1" --pages . $spg-$epg -- ./"$filename"/_%d

# Rename split pages
c=0
while read s
do
    c=$(expr $c + 1)
    # Zero-padding indices where there're 10+ signatories
    if [ $npg -gt 9 ]
    then
        cc=$(printf "%02d" $c)
    else
        cc=$c
    fi
    newname=$(echo "$filename""_""$label""_""$cc""_""$s"".pdf")
    mv "./$filename/_$cc" "./$filename/$newname"&&\
    echo "[Output] $newname"
done < "$2"