#!/bin/sh
#
# $Id: dupfiles,v 1.3 2007/12/31 00:08:14 vogelke Exp $
#
# Find duplicate files under one or more directories.
# Written: Oct 13, 1997

PATH=/usr/local/bin:/bin:/usr/bin:/sbin
export PATH
umask 022

case "$#" in
    0)  echo "usage: $0 dir [dir ...]" >& 2; exit 1 ;;
    *)  dirs="$*" ;;
esac

find $dirs -type f -xdev -print0 | xargs -0 rmd160 | sort |
  awk '
  BEGIN { last = 1; current = 2 }
  {
        if (last == current) {
            printf "%s\n%s\n", lastfull, currentfull
        }
        else {
            printf "\n"
        }

        last = current
        lastfull = currentfull
        current = $1
        currentfull = $0
  }' | uniq

exit 0