#!/bin/bash
#
# check-md5s version 1.1 (11/09/1999)
#
# Simple script to check the validity of the CD.
#
# Usage:  check-md5s /path/to/md5sums.txt
# 
# Returns 0 if no invalid checksums were found, 1 otherwise.
#
# This script is in the public domain, use as you please (but I do like 
# getting credit, cash and/or feedback from my work, hint hint).
#
#		- Bjarni R. Einarsson
#		  http://bre.klaki.net/
#
#############################################################################

if [ "$1" = "" ]; then
	SUMS=misc/md5sums.txt

	if [ -e md5sums.txt ]; then
		cd ..
	fi
else
	SUMS=$1
fi

if [ ! -e $SUMS ]; then
	echo "Couldn't find $SUMS!"
	echo
	echo "Usage:  $0 /path/to/md5sums.txt"
	exit 1
fi

FNUM=$(wc -l $SUMS|awk '{print $1}')
COUNT=1
SP="                                                                              "
BAD=0

echo "Verifying $FNUM MD5 sums, this may take a while..."
cat $SUMS \
 | while read MD5SUM FILENAME; do
 	if [ ! -e "$FILENAME" ]; then
		echo "File not found: $FILENAME"
	else
	 	echo -n -e "MD5: $COUNT/$FNUM $FILENAME\r"
		NEWSUM=$(md5sum "$FILENAME" |awk '{print $1}')

		if [ $NEWSUM != $MD5SUM ]; then
			echo "Bad:"
			BAD=$BAD+1
		fi
	fi
	let COUNT=$COUNT+1
	echo -n -e "$SP\r"
done

if [ $BAD != 0 ]; then
	echo
	echo "$BAD files had invalid MD5 checksums!"
	exit 1
fi
exit 0