#!/bin/sh
#
# paulius@devnull.lt
# duplicate file checker, needs one argument - directory in which we want
# to look for duplicates...

[ $# -ne 1 ] && exit 1

OS=`uname -s`
case $OS in
	FreeBSD)
		MD5='md5 -r'
		;;
	Linux)
		MD5=md5sum
		;;
	*)
		echo "Your OS is not supported, check the source ;)"
		exit 1
esac

MD5FILE=/tmp/md5.list.txt
MD5FILE_S=/tmp/md5_s.list.txt
MD5FILE_U=/tmp/md5_u.list.txt

find $1 -type f -exec $MD5 {} \; > $MD5FILE
sort $MD5FILE | cut -d ' ' -f1 > $MD5FILE_S
uniq $MD5FILE_S | cut -d ' ' -f1 > $MD5FILE_U
FILELIST=`diff $MD5FILE_S $MD5FILE_U | grep '^<' | cut -d ' ' -f2`

for m in $FILELIST; do
	grep $m $MD5FILE | awk '{ print $2; }'
	echo " "
done

[ -f $MD5FILE ] && rm $MD5FILE
[ -f $MD5FILE_S ] && rm $MD5FILE_S
[ -f $MD5FILE_U ] && rm $MD5FILE_U