Unlocks all pdfs in a folder using pdftk

unlockpdfs.sh

#!/bin/bash
for filename in *.pdf; do
    pdftk $filename input_pw $1 output "$filename.tmp.pdf"
    if [ $? -eq 0 ]; then
        rm "$filename"
        mv "$filename.tmp.pdf" "$filename"
        touch "${filename}"
    fi
done