#!/bin/bash
convert=$(gs -q -sPAPERSIZE=a4 -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile="$1" "$2" "$3" 2>&1)

if echo "$convert" | grep -q "Error: " ; then
    echo "Failed to cat files"
    echo $convert
else
    echo "Wrote contents of $2 and $3 to $1"
    rm -v "$2" "$3"
fi