#!/bin/bash

#
# write2cd - script for writing given directories on CD
#
# Author:  Christoph Dalitz, Thomas Karsten
# Version: 1.1 from 2004.04.23
#

DIRS=""
GRAFTPOINTS=""
MSINFO=""
MERGE=""
FIRST="no"
USAGEMSG="USAGE:\n\
\t`basename $0` [-?] [-close] [-first] [-merge] dirs\n\
OPTIONS:\n\
\t-?     prints usage message\n\
\t-close close (multisession) CD\n\
\t-first do not read multi session info\n\
\t-merge merge into multisession CD image\n\
\tdirs   directories to burn on CD\n\
\t       must be in the form of a cdrecord dirlist\n\
\t       eg. /home/chris or /home/=/home/chris/"

# config params:
#+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
# SCSI device of cdwriter (needs to be configured!!)
DEV=""
#DEV="IODVDServices"          # Apple SuperDrive or Apple Combo Drive
#DEV="IOCompactDiscServices"  # plain CD burner
#+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
# temporary files
TMPISO="/tmp/tmp.iso"
TIMESTAMP="/tmp/timestmp"
# options for mkisofs for omitting files/directories (-m ...)
OMITOPTS="-m '*.o'"
# options for multisession burning with cdrecord
MULTIOPTS="-multi -data"

# plausi check whether device is configured
if [ -z "$DEV" ]
then
	echo "ERROR:" 2>&1
	echo "    Before using $0 you must configure the variable DEV" 2>&1
	echo "    Open $0 in an editor and set this variable" 2>&1
	exit 1
fi

# argument loop
while [ $# -gt 0 ]
do
	case $1 in
		-?)     echo -e "$USAGEMSG"; exit 0;;
		-close) MULTIOPTS="";;
		-first) FIRST="yes";;
		-merge) MERGE="-M $DEV";;
		-*)     echo -e "$USAGEMSG" 1>&2; exit 1;;
		*)      DIRS="$DIRS $1";;
	esac
	shift
done
if [ -z "$DIRS" ]
then
	echo -e "$USAGEMSG" 1>&2
	exit 1
fi
echo "$DIRS" | grep -q '=' && GRAFTPOINTS="y"
for d in $DIRS
do
	hgp=""
	echo "$d" | grep -q '=' && d=`echo "$d" | cut -f 2 -d '='`
	if [ $? -eq 0 ]; then
		hgp="y"
	fi

	if [ "$GRAFTPOINTS" != "$hgp" ]; then
		echo "$d: graft point is missing." 1>&2
		exit 1
	fi

	test -e "$d" || { echo -e "$d not found\n$USAGEMSG" 1>&2; exit 1; }
done

# determine multisession info
if [ $FIRST != "yes" ]
then
	MSINFO="`cdrecord dev=$DEV -msinfo | awk '/^[0-9]+,[0-9]+$/ { print $1 }'`"
	test -z "$MSINFO" || MSINFO="-C $MSINFO"
fi

# add option "-graft-points", if the directories are given with
# a destination
if [ $GRAFTPOINTS ]; then
	GRAFTPOINTS=-graft-points
fi

# add timestamp
date > $TIMESTAMP

# write CD
set -x
# on some OSes/processors the output of mkisofs can also be piped
# directly into cdrecord; this does not work however on Windows 2000
mkisofs -o $TMPISO -r -R -J $OMITOPTS $MSINFO $MERGE $GRAFTPOINTS $DIRS $TIMESTAMP && \
	cdrecord -v dev=$DEV speed=16 $MULTIOPTS -eject $TMPISO

# cleanup
rm -f $TMPISO
rm -f $TIMESTAMP