[home.git] / .bin / backup-dvd

#!/bin/bash

err() { printf 'error: %b\n' "$*" 1>&2; exit 1; }
usage() {
	cat <<-EOF
	backup-dvd [options] [commands]

	Options:
	 -i <input dev>      Defaults to ${dev}
	 -o <output dir>     Defaults to ${out}
	 -n <volume name>    Defaults to volume on disk

	Commands:
	 --errors   Image the raw disc first w/ddrescue
	 --backup   Back up the disc
	 --modify   Tweak runtime settings (needs -n)
	 --mkiso    Create an iso (needs -n)

	If no commands are specified, then all are run.
	EOF
	exit ${1:-0}
}

dev=/dev/cdrom
out=${PWD}
vol=

unset doit_{backup,modify,mkiso}
doit_errors=false

eval set -- `getopt -l errors,backup,modify,mkiso -- hi:n:o: "$@"`
while [[ -n $1 ]] ; do
	case $1 in
		-h) usage;;
		-i) dev=$2; shift 2;;
		-o) out=$2; shift 2;;
		-n) vol=$2; shift 2;;

		--errors) doit_errors=true; shift;;
		--backup) doit_backup=true; shift;;
		--modify) doit_modify=true; shift;;
		--mkiso)  doit_mkiso=true;  shift;;

		--) shift; break;;
		-*) usage 1;;
		*)  usage 2; break;;
	esac
done

doit_all() {
	: ${doit_backup:=$1}
	: ${doit_modify:=$1}
	: ${doit_mkiso:=$1}
}
if [[ -z ${doit_backup}${doit_modify}${doit_mkiso} ]] ; then
	doit_all true
else
	doit_all false
fi

# iso-info		mkisofs
Application=	# -A
Preparer=		# -p
Publisher=		# -publisher
System=			# -sysid
Volume=${vol}	# -V
Volume_Set=		# -volset

if ${doit_backup} ; then
	if [[ -z ${Volume} ]] ; then
		info=$(iso-info ${dev}) || exit 1

		eval $(echo "${info}" | awk -F: '
			(NF > 1 && $1 !~ /image/) {
				sub(/ *$/, "", $1);
				sub(/ /, "_", $1);
				sub(/^ */, "", $2);
				print $1 "=\"" $2 "\"";
		}')
	fi

	if [[ -z ${Volume} ]] ; then
		echo "Unable to parse Volume out of ISO"
		iso-info ${dev}
	fi

	for v in Application Preparer Publisher System Volume Volume_Set ; do
		echo "${v}='${!v}'"
	done > "${out}/.${Volume}.vars.sh"
else
	[[ -z ${Volume} ]] && err "Need to specify -n with --modify/--mkiso"
	. "${out}/.${Volume}.vars.sh" || exit 1
fi

e() {
	for a ; do
		[[ ${a} == *" "* || ${#a} == 0 ]] && fmt='"%s"' || fmt='%s'
		printf "${fmt} " "${a}"
	done
	echo
	"$@"
}

#
# Mirror the disc w/ddrescue which tolerates errors.
#
raw_read_dvd() {
	echo "Imaging disc"
	local raw=".${Volume}.raw"
	local log="${raw}.log"
	local opts=(
		-v -b 2048 ${dev} "${raw}" "${log}"
	)
	ddrescue -p -n "${opts[@]}"
	ddrescue -d -r 3 "${opts[@]}"
	ddrescue -d -r 3 -R "${opts[@]}"
	dev=${raw}
}

#
# Backup the disc.
#
backup_dvd() {
	echo "Backing up: ${Volume}"
	local opts=(
		-i ${dev}
		-o "${out}"
		-n "${Volume}"
	)
	if ! e dvdbackup -M "${opts[@]}" ; then
		e dvdbackup -F "${opts[@]}" || exit 1
	fi
}

#
# Modify some of the runtime settings.
#
bytes_get() {
	local pfx='0x' sep
	while [[ $# -gt 3 ]]; do
		case $1 in
		"-p") pfx=$2;;
		"-s") sep=$2;;
		*) break;;
		esac
		shift 2
	done
	printf '%b' "${pfx}"

	local file=$1 off=$2 num=${3:-1}
	hexdump -v -n ${num} -s $((${off})) -e "1/1 \"%02x${sep}\"" "${file}"
}
bytes_set() {
	local file=$1 off=$2
	shift 2
	(for b; do printf "\x${b#0x}"; done) | \
		dd of="${file}" \
			bs=1 seek=$((${off})) \
			conv=notrunc status=none
}
dvdsec() {
	# DVDs have sectors of 2048 bytes (2^11).
	local file=$1 off=$2 num=${3:-4}
	echo $(( $(bytes_get "${file}" "${off}" "${num}") << 11 ))
}

_check_ifo() {
	# Back up the .IFO files before we edit them.
	local ifo=$1 magic=$2
	[[ -e ${ifo} ]] || return 1

	if [[ $(bytes_get "${ifo}" 0 12) != "0x${magic}" ]] ; then
		echo "not a VMG IFO file: ${ifo}"
		return 1
	fi
	if [[ ! -e ${ifo}.bak ]] ; then
		cp -a "${ifo}" "${ifo}.bak"
	fi

	return 0
}

check_changes() {
	[[ -e ifodump ]] || return 0

	local file=$1
	./ifodump -f "${file}.bak" > "${file}.bak.dmp"
	./ifodump -f "${file}" > "${file}.dmp"
	diff -u "${file}.bak.dmp" "${file}.dmp" | sed -e 1d -e 2d > "${file}.diff"
	local out=$(
		grep '^[+-]' "${file}.diff" | \
			grep -v \
				-e '^-VMG Category:.*' \
				-e '^+VMG Category: 00000000 (Region Code=ff)' \
				-e '^[-+].*Title playback type:' \
				-e '^-.*Title or time play:1' \
				-e '^+.*Title or time play:0' \
				-e '^-Prohibited user operations:' \
				-e '^+Prohibited user operations: Angle Change, $' \
				-e '^+Prohibited user operations: None$' \
			| egrep -v -e '^[-+]([0-9a-f]{2} )+$'
	)
	rm "${file}".{{,bak.}dmp,diff}
	if [[ -z ${out} ]] ; then
		return 0
	else
		echo "error in ifo modification:"
		echo "${out}"
		return 1
	fi
}

process_pgci() {
	# http://dvdnav.mplayerhq.hu/dvdinfo/pgc.html
	local file=$1 pgci_off=$2 indent=$3
	local num_pgcs p pgc_off off

	num_pgcs=$(bytes_get "${file}" ${pgci_off} 2)
	for (( p = 0; p < num_pgcs; ++p )) ; do
		pgc_off=$((
			pgci_off +
			$(bytes_get "${file}" $(( pgci_off + 8 + 8 * p + 4 )) 4)
		))
		off=$(( pgc_off + 8 ))
		pgc_puo=$(bytes_get "${file}" ${off} 4)
		printf '%bpgc #%2i @ %#06x: %s: ' "${indent}" ${p} ${vmgm_pgc_off} ${pgc_puo}
		new_pgc_puo=$(( pgc_puo & (1 << 22) )) # Keep angle field.
		if [[ ${pgc_puo} -ne ${new_pgc_puo} ]] ; then
			bytes_set "${file}" ${off} 0 $(printf '%x' $(( new_pgc_puo >> 16 ))) 0 0
			echo "cleared"
		else
			echo "nothing to do"
		fi
	done
}

process_pgci_ut() {
	# http://dvdnav.mplayerhq.hu/dvdinfo/ifo_vts.html#pgciut
	local file=$1 pgci_ut_off=$2
	local num_langs l off

	num_langs=$(bytes_get "${file}" ${pgci_ut_off} 2)
	for (( l = 0; l < num_langs; ++l )) ; do
		off=$((
			pgci_ut_off +
			$(bytes_get "${file}" $(( pgci_ut_off + 8 + 8 * l + 4 )) 4)
		))
		printf '\tclearing lang #%i @ %#06x\n' ${l} ${off}
		process_pgci "${file}" ${off} '\t\t'
	done
}

process_vmgi() {
	# Back up the .IFO files before we edit them.
	local vmgi=$1
	_check_ifo "${vmgi}" "445644564944454f2d564d47" || return 1

	echo "${vmgi}"

	# Clear the region code.
	# http://dvdnav.mplayerhq.hu/dvdinfo/ifo.html
	# 0x23 - region code restrict byte - set to 0x00 for region free.
	echo "clearing region code"
	bytes_set "${vmgi}" 0x23 0x00

	# Clear all Prohibited User Operations (PUOs) in TT_SRPT (Uop1 & Uop0).
	# http://dvdnav.mplayerhq.hu/dvdinfo/ifo_vmg.html
	echo "clearing PUOs in TT_SRPT"
	tt_srpt_sec=$(dvdsec "${vmgi}" 0xC4)

	num_titles=$(bytes_get "${vmgi}" ${tt_srpt_sec} 2)
	for (( t = 0; t < num_titles; ++t )) ; do
		off=$(( tt_srpt_sec + 8 + (t * 12) ))
		printf "\ttitle type #%2i @ %#06x: " "${t}" "${off}"
		title_type=$(bytes_get "${vmgi}" ${off} 1)
		uop0=$(( title_type & 1 ))
		uop1=$(( title_type & 2 ))
		printf "%s (uop1:%i uop0:%i): " ${title_type} ${uop1} ${uop0}
		new_title_type=$(( title_type & ~3 ))
		if [[ ${title_type} -ne ${new_title_type} ]] ; then
			bytes_set "${vmgi}" ${off} $(printf '%x' ${new_title_type})
			echo "cleared"
		else
			echo "nothing to do"
		fi
	done

	# Clear all the PUOs in the PGCs.  But Preserve the angle bit.
	#   Note: Removal of the angle PUO can cause certain standalone players to
	#   display the "angle" icon during playback. Removal of the angle PUO
	#   whilst permitted is therefore not recommended.
	# http://dvdnav.mplayerhq.hu/dvdinfo/uops.html
	#fp_pgc_addr=$(bytes_get "${vmgi}" 0x84 4)
	#num_pgcs=$(bytes_get "${vmgi}" $(( fp_pgc_sec + 1 )) 1)
	echo "clearing PUOs in PGCs"
	vmgm_pgci_ut_sec=$(dvdsec "${vmgi}" 0xC8)
	process_pgci_ut "${vmgi}" ${vmgm_pgci_ut_sec}
}

process_vtsi() {
	# Back up the .IFO files before we edit them.
	local vtsi=$1
	_check_ifo "${vtsi}" "445644564944454f2d565453" || return 1

	echo "${vtsi}"

	echo "clearing PUOs in PGCs"

	vts_pgci_sec=$(dvdsec "${vtsi}" 0xCC)
	process_pgci "${vtsi}" ${vts_pgci_sec} '\t'

	vtsm_pgci_ut_sec=$(dvdsec "${vtsi}" 0xD0)
	process_pgci_ut "${vtsi}" ${vtsm_pgci_ut_sec}
}

modify_dvd() {
	local out_vts_dir="${out}/${Volume}/VIDEO_TS"
	local vmgi vtsi

	if ${doit_errors} ; then
		echo "skipping modifications due to possible errors in files"
		return
	fi

	for vmgi in "${out_vts_dir}"/VIDEO_TS.{IFO,BUP} ; do
		process_vmgi "${vmgi}"
		check_changes "${vmgi}" || exit 1
	done

	for vtsi in "${out_vts_dir}"/VTS_??_?.{IFO,BUP} ; do
		process_vtsi "${vtsi}"
		check_changes "${vtsi}" || exit 1
	done
}

#
# Finally, create a new iso.
#
mkiso_dvd() {
	set -- mkisofs -quiet -dvd-video -no-bak \
		-A "${Application}" \
		-p "${Preparer}" \
		-publisher "${Publisher}" \
		-sysid "${System}" \
		-V "${Volume}" \
		-volset "${Volume_Set}" \
		-o "${Volume}.iso" "${Volume}"
	sh="${out}/.${Volume}.sh"
	(
	echo "#!/bin/sh"
	echo "cd '${out}' || exit 1"
	echo ". './.${Volume}.vars.sh'"
	printf 'set -- '
	printf '%q ' "$@"
	echo
	echo 'echo "$@"; exec "$@"'
	) > "${sh}"
	chmod a+x "${sh}"
	"${sh}" || exit

	du -h "${out}/${Volume}.iso"
	sudo chattr +i "${out}/${Volume}.iso"
}

${doit_errors} && raw_read_dvd
${doit_backup} && backup_dvd
${doit_modify} && modify_dvd
${doit_mkiso} && mkiso_dvd

${doit_backup} && eject
exit 0
Commit	Line	Data
4108a92c MF	1	#!/bin/bash
4108a92c MF	2
d6d9f2ac	3	err() { printf 'error: %b\n' "$*" 1>&2; exit 1; }
4108a92c MF	4	usage() {
4108a92c MF	5	cat <<-EOF
d6d9f2ac	6	backup-dvd [options] [commands]
4108a92c MF	7
	8	Options:
	9	-i <input dev> Defaults to ${dev}
	10	-o <output dir> Defaults to ${out}
2b2f7f17	11	-n <volume name> Defaults to volume on disk
d6d9f2ac MF	12
d6d9f2ac MF	13	Commands:
a356b2d3	14	--errors Image the raw disc first w/ddrescue
d6d9f2ac MF	15	--backup Back up the disc
	16	--modify Tweak runtime settings (needs -n)
	17	--mkiso Create an iso (needs -n)
	18
	19	If no commands are specified, then all are run.
4108a92c MF	20	EOF
	21	exit ${1:-0}
	22	}
	23
	24	dev=/dev/cdrom
	25	out=${PWD}
2b2f7f17	26	vol=
4108a92c	27
d6d9f2ac	28	unset doit_{backup,modify,mkiso}
a356b2d3	29	doit_errors=false
d6d9f2ac	30
a356b2d3	31	eval set -- `getopt -l errors,backup,modify,mkiso -- hi:n:o: "$@"`
4108a92c MF	32	while [[ -n $1 ]] ; do
	33	case $1 in
	34	-h) usage;;
	35	-i) dev=$2; shift 2;;
	36	-o) out=$2; shift 2;;
2b2f7f17	37	-n) vol=$2; shift 2;;
d6d9f2ac	38
a356b2d3	39	--errors) doit_errors=true; shift;;
d6d9f2ac MF	40	--backup) doit_backup=true; shift;;
	41	--modify) doit_modify=true; shift;;
	42	--mkiso) doit_mkiso=true; shift;;
	43
4108a92c MF	44	--) shift; break;;
	45	-*) usage 1;;
	46	*) usage 2; break;;
	47	esac
	48	done
	49
d6d9f2ac MF	50	doit_all() {
	51	: ${doit_backup:=$1}
	52	: ${doit_modify:=$1}
	53	: ${doit_mkiso:=$1}
	54	}
	55	if [[ -z ${doit_backup}${doit_modify}${doit_mkiso} ]] ; then
	56	doit_all true
	57	else
	58	doit_all false
	59	fi
	60
4108a92c MF	61	# iso-info mkisofs
	62	Application= # -A
	63	Preparer= # -p
	64	Publisher= # -publisher
	65	System= # -sysid
2b2f7f17	66	Volume=${vol} # -V
4108a92c MF	67	Volume_Set= # -volset
4108a92c MF	68
d6d9f2ac MF	69	if ${doit_backup} ; then
	70	if [[ -z ${Volume} ]] ; then
	71	info=$(iso-info ${dev}) \|\| exit 1
4108a92c	72
d6d9f2ac MF	73	eval $(echo "${info}" \| awk -F: '
	74	(NF > 1 && $1 !~ /image/) {
	75	sub(/ *$/, "", $1);
	76	sub(/ /, "_", $1);
	77	sub(/^ */, "", $2);
	78	print $1 "=\"" $2 "\"";
	79	}')
	80	fi
4108a92c	81
d6d9f2ac MF	82	if [[ -z ${Volume} ]] ; then
	83	echo "Unable to parse Volume out of ISO"
	84	iso-info ${dev}
	85	fi
4108a92c	86
d6d9f2ac MF	87	for v in Application Preparer Publisher System Volume Volume_Set ; do
	88	echo "${v}='${!v}'"
	89	done > "${out}/.${Volume}.vars.sh"
	90	else
	91	[[ -z ${Volume} ]] && err "Need to specify -n with --modify/--mkiso"
	92	. "${out}/.${Volume}.vars.sh" \|\| exit 1
	93	fi
4108a92c MF	94
	95	e() {
	96	for a ; do
	97	[[ ${a} == " " \|\| ${#a} == 0 ]] && fmt='"%s"' \|\| fmt='%s'
	98	printf "${fmt} " "${a}"
	99	done
	100	echo
	101	"$@"
	102	}
d6d9f2ac	103
a356b2d3 MF	104	#
	105	# Mirror the disc w/ddrescue which tolerates errors.
	106	#
	107	raw_read_dvd() {
	108	echo "Imaging disc"
	109	local raw=".${Volume}.raw"
	110	local log="${raw}.log"
	111	local opts=(
	112	-v -b 2048 ${dev} "${raw}" "${log}"
	113	)
	114	ddrescue -p -n "${opts[@]}"
	115	ddrescue -d -r 3 "${opts[@]}"
	116	ddrescue -d -r 3 -R "${opts[@]}"
	117	dev=${raw}
	118	}
	119
d6d9f2ac MF	120	#
	121	# Backup the disc.
	122	#
d6d9f2ac MF	123	backup_dvd() {
d6d9f2ac MF	124	echo "Backing up: ${Volume}"
a356b2d3 MF	125	local opts=(
	126	-i ${dev}
	127	-o "${out}"
	128	-n "${Volume}"
	129	)
d6d9f2ac MF	130	if ! e dvdbackup -M "${opts[@]}" ; then
	131	e dvdbackup -F "${opts[@]}" \|\| exit 1
	132	fi
	133	}
	134
	135	#
	136	# Modify some of the runtime settings.
	137	#
	138	bytes_get() {
	139	local pfx='0x' sep
	140	while [[ $# -gt 3 ]]; do
	141	case $1 in
	142	"-p") pfx=$2;;
	143	"-s") sep=$2;;
	144	*) break;;
	145	esac
	146	shift 2
	147	done
	148	printf '%b' "${pfx}"
	149
	150	local file=$1 off=$2 num=${3:-1}
	151	hexdump -v -n ${num} -s $((${off})) -e "1/1 \"%02x${sep}\"" "${file}"
	152	}
	153	bytes_set() {
	154	local file=$1 off=$2
	155	shift 2
	156	(for b; do printf "\x${b#0x}"; done) \| \
	157	dd of="${file}" \
	158	bs=1 seek=$((${off})) \
	159	conv=notrunc status=none
	160	}
	161	dvdsec() {
	162	# DVDs have sectors of 2048 bytes (2^11).
	163	local file=$1 off=$2 num=${3:-4}
	164	echo $(( $(bytes_get "${file}" "${off}" "${num}") << 11 ))
	165	}
	166
	167	_check_ifo() {
	168	# Back up the .IFO files before we edit them.
	169	local ifo=$1 magic=$2
	170	[[ -e ${ifo} ]] \|\| return 1
	171
	172	if [[ $(bytes_get "${ifo}" 0 12) != "0x${magic}" ]] ; then
	173	echo "not a VMG IFO file: ${ifo}"
	174	return 1
	175	fi
	176	if [[ ! -e ${ifo}.bak ]] ; then
	177	cp -a "${ifo}" "${ifo}.bak"
	178	fi
	179
	180	return 0
	181	}
	182
	183	check_changes() {
	184	[[ -e ifodump ]] \|\| return 0
	185
	186	local file=$1
	187	./ifodump -f "${file}.bak" > "${file}.bak.dmp"
	188	./ifodump -f "${file}" > "${file}.dmp"
	189	diff -u "${file}.bak.dmp" "${file}.dmp" \| sed -e 1d -e 2d > "${file}.diff"
	190	local out=$(
	191	grep '^[+-]' "${file}.diff" \| \
	192	grep -v \
	193	-e '^-VMG Category:.*' \
194	-e '^+VMG Category: 00000000 (Region Code=ff)' \
195	-e '^[-+].*Title playback type:' \
196	-e '^-.*Title or time play:1' \
197	-e '^+.*Title or time play:0' \
198	-e '^-Prohibited user operations:' \
199	-e '^+Prohibited user operations: Angle Change, $' \
200	-e '^+Prohibited user operations: None$' \
201	\| egrep -v -e '^[-+]([0-9a-f]{2} )+$'
202	)
203	rm "${file}".{{,bak.}dmp,diff}
204	if [[ -z ${out} ]] ; then
205	return 0
206	else
207	echo "error in ifo modification:"
208	echo "${out}"
209	return 1
210	fi
211	}
212
213	process_pgci() {
214	# http://dvdnav.mplayerhq.hu/dvdinfo/pgc.html
215	local file=$1 pgci_off=$2 indent=$3
216	local num_pgcs p pgc_off off
217
218	num_pgcs=$(bytes_get "${file}" ${pgci_off} 2)
219	for (( p = 0; p < num_pgcs; ++p )) ; do
220	pgc_off=$((
221	pgci_off +
222	$(bytes_get "${file}" $(( pgci_off + 8 + 8 * p + 4 )) 4)
223	))
224	off=$(( pgc_off + 8 ))
225	pgc_puo=$(bytes_get "${file}" ${off} 4)
226	printf '%bpgc #%2i @ %#06x: %s: ' "${indent}" ${p} ${vmgm_pgc_off} ${pgc_puo}
227	new_pgc_puo=$(( pgc_puo & (1 << 22) )) # Keep angle field.
228	if [[ ${pgc_puo} -ne ${new_pgc_puo} ]] ; then
229	bytes_set "${file}" ${off} 0 $(printf '%x' $(( new_pgc_puo >> 16 ))) 0 0
230	echo "cleared"
231	else
232	echo "nothing to do"
233	fi
234	done
235	}
236
237	process_pgci_ut() {
238	# http://dvdnav.mplayerhq.hu/dvdinfo/ifo_vts.html#pgciut
239	local file=$1 pgci_ut_off=$2
240	local num_langs l off
241
242	num_langs=$(bytes_get "${file}" ${pgci_ut_off} 2)
243	for (( l = 0; l < num_langs; ++l )) ; do
244	off=$((
245	pgci_ut_off +
246	$(bytes_get "${file}" $(( pgci_ut_off + 8 + 8 * l + 4 )) 4)
247	))
248	printf '\tclearing lang #%i @ %#06x\n' ${l} ${off}
249	process_pgci "${file}" ${off} '\t\t'
250	done
251	}
252
253	process_vmgi() {
254	# Back up the .IFO files before we edit them.
255	local vmgi=$1
256	_check_ifo "${vmgi}" "445644564944454f2d564d47" \|\| return 1
257
258	echo "${vmgi}"
259
260	# Clear the region code.
261	# http://dvdnav.mplayerhq.hu/dvdinfo/ifo.html
262	# 0x23 - region code restrict byte - set to 0x00 for region free.
263	echo "clearing region code"
264	bytes_set "${vmgi}" 0x23 0x00
265
266	# Clear all Prohibited User Operations (PUOs) in TT_SRPT (Uop1 & Uop0).
267	# http://dvdnav.mplayerhq.hu/dvdinfo/ifo_vmg.html
268	echo "clearing PUOs in TT_SRPT"
269	tt_srpt_sec=$(dvdsec "${vmgi}" 0xC4)
270
271	num_titles=$(bytes_get "${vmgi}" ${tt_srpt_sec} 2)
272	for (( t = 0; t < num_titles; ++t )) ; do
273	off=$(( tt_srpt_sec + 8 + (t * 12) ))
274	printf "\ttitle type #%2i @ %#06x: " "${t}" "${off}"
275	title_type=$(bytes_get "${vmgi}" ${off} 1)
276	uop0=$(( title_type & 1 ))
277	uop1=$(( title_type & 2 ))
278	printf "%s (uop1:%i uop0:%i): " ${title_type} ${uop1} ${uop0}
279	new_title_type=$(( title_type & ~3 ))
280	if [[ ${title_type} -ne ${new_title_type} ]] ; then
281	bytes_set "${vmgi}" ${off} $(printf '%x' ${new_title_type})
282	echo "cleared"
283	else
284	echo "nothing to do"
285	fi
286	done
287
288	# Clear all the PUOs in the PGCs. But Preserve the angle bit.
289	# Note: Removal of the angle PUO can cause certain standalone players to
290	# display the "angle" icon during playback. Removal of the angle PUO
291	# whilst permitted is therefore not recommended.
292	# http://dvdnav.mplayerhq.hu/dvdinfo/uops.html
293	#fp_pgc_addr=$(bytes_get "${vmgi}" 0x84 4)
294	#num_pgcs=$(bytes_get "${vmgi}" $(( fp_pgc_sec + 1 )) 1)
295	echo "clearing PUOs in PGCs"
296	vmgm_pgci_ut_sec=$(dvdsec "${vmgi}" 0xC8)
297	process_pgci_ut "${vmgi}" ${vmgm_pgci_ut_sec}
298	}
299
300	process_vtsi() {
301	# Back up the .IFO files before we edit them.
302	local vtsi=$1
303	_check_ifo "${vtsi}" "445644564944454f2d565453" \|\| return 1
304
305	echo "${vtsi}"
306
307	echo "clearing PUOs in PGCs"
308
309	vts_pgci_sec=$(dvdsec "${vtsi}" 0xCC)
310	process_pgci "${vtsi}" ${vts_pgci_sec} '\t'
311
312	vtsm_pgci_ut_sec=$(dvdsec "${vtsi}" 0xD0)
313	process_pgci_ut "${vtsi}" ${vtsm_pgci_ut_sec}
314	}
315
316	modify_dvd() {
317	local out_vts_dir="${out}/${Volume}/VIDEO_TS"
318	local vmgi vtsi
319
a356b2d3 MF	320	if ${doit_errors} ; then
	321	echo "skipping modifications due to possible errors in files"
	322	return
	323	fi
	324
d6d9f2ac MF	325	for vmgi in "${out_vts_dir}"/VIDEO_TS.{IFO,BUP} ; do
	326	process_vmgi "${vmgi}"
	327	check_changes "${vmgi}" \|\| exit 1
	328	done
	329
	330	for vtsi in "${out_vts_dir}"/VTS_??_?.{IFO,BUP} ; do
	331	process_vtsi "${vtsi}"
	332	check_changes "${vtsi}" \|\| exit 1
	333	done
	334	}
	335
	336	#
	337	# Finally, create a new iso.
	338	#
	339	mkiso_dvd() {
	340	set -- mkisofs -quiet -dvd-video -no-bak \
	341	-A "${Application}" \
	342	-p "${Preparer}" \
	343	-publisher "${Publisher}" \
	344	-sysid "${System}" \
	345	-V "${Volume}" \
	346	-volset "${Volume_Set}" \
	347	-o "${Volume}.iso" "${Volume}"
	348	sh="${out}/.${Volume}.sh"
	349	(
	350	echo "#!/bin/sh"
	351	echo "cd '${out}' \|\| exit 1"
	352	echo ". './.${Volume}.vars.sh'"
	353	printf 'set -- '
	354	printf '%q ' "$@"
	355	echo
	356	echo 'echo "$@"; exec "$@"'
	357	) > "${sh}"
	358	chmod a+x "${sh}"
	359	"${sh}" \|\| exit
	360
	361	du -h "${out}/${Volume}.iso"
a356b2d3	362	sudo chattr +i "${out}/${Volume}.iso"
d6d9f2ac MF	363	}
d6d9f2ac MF	364
a356b2d3	365	${doit_errors} && raw_read_dvd
d6d9f2ac MF	366	${doit_backup} && backup_dvd
	367	${doit_modify} && modify_dvd
	368	${doit_mkiso} && mkiso_dvd
	369
	370	${doit_backup} && eject
	371	exit 0