#!/bin/bash
[ -z "$1" ] && echo "usage: $0 <infile> <tmp-id>" && exit 1
SRC="$1"
DST="/tmp/$2"
[ -z "$DS" ] && DST="/tmp/$1"
mkdir -p $(dirname "$DST")
touch "$DST"
diff "$SRC" "$DST"
cp -a "$SRC" "$DST"