#!/bin/bash

# Author: Joshua V. Dillon
# Date:   Aug. 4, 2007
# Email:  jvdillon AATT purdue DDOOTT edu
# About:  growisofs wrapper
#         sudo aptitude install coreutils dvd+rw-tools



# --- parse inputs -------------------------------
# volume ID is no more than 32 alpha, digit, or '_'
VOLID=`echo -n $1 | tr -dc '_[:space:][:alnum:]' | \
		tr 'a-z' 'A-Z' | tr -s [:space:] '_'`
VOLID=${VOLID:0:32}
# will later use relative directory access, hence length
SRCDIR=$2
SPLIT=`expr length "$SRCDIR"`


# --- burn DVD -----------------------------------
growisofs -use-the-force-luke=dao \
	-input-charset=iso8859-1 -dvd-compat \
	-J -R -pad -Z /dev/scd0 -speed=4 -overburn \
	-V "$VOLID" "$SRCDIR"

#	-allow-leading-dots -allow-lowercase \
#	-allow-multidot -d \
#	-iso-level 4 \

EXITCODE=$?
if [ $EXITCODE -ne 0 ]; then
	echo "unable to burn DVD"
	rm -f $TMPFILE
	exit 2
fi

sudo eject cdrom
sudo eject -t cdrom
sleep 20


# --- compute MD5 checksums ----------------------
TMPFILE=`mktemp` || exit 1
OLDIFS=$IFS; IFS=$'\t'
find "$SRCDIR" -type f -printf "%p\t%s\n" | \
		sort | while read FILE SIZE; do
	MD5=`md5sum -b "$FILE" | awk '{print $1}'`
	# someday may want to add Jigdo support, i.e.,
	# printf "% 32s %012d /%s\n" \
	#		$MD5 $SIZE ${FILE:$SPLIT} >> $JIGDOFILE
	echo "$MD5 *${FILE:$SPLIT}" >> $TMPFILE
done
IFS=$OLDIFS


# --- verification -------------------------------
cd /media/cdrom0
md5sum -c $TMPFILE 1> ~/burn.log 2>/dev/null
EXITCODE=$?
cat $TMPFILE >> ~/burn.log
rm -f $TMPFILE
if [ $EXITCODE -eq 0 ]; then
	echo "verification successful"
else
	echo "verification failed!"
fi

if [ "x`which -a beep`" != "x" ]; then
	sudo beep 783.99 500
	sudo beep 880.00 500
	sudo beep 698.46 500
	sudo beep 349.23 500
	sudo beep 523.25 700
fi

# code graveyard
#SRCDIR=`echo $2 | sed -e 's/\/$//g' | \
#	sed -e 's/\//\\\\\//g'`
#echo "$SRCDIR\n"
#FILE=`echo $FILE|sed "s/${SRCDIR}\///g"`