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Revision 1.4 by root, Wed Aug 14 22:03:36 2019 UTC vs.
Revision 1.76 by root, Tue Aug 9 11:44:54 2022 UTC

1	#!/opt/bin/perl	1	#!/usr/bin/perl
2		2
3	#	3	#
4	# PBCDEDIT - Copyright 2019 Marc A. Lehmann <pbcbedit@schmorp.de>	4	# PBCDEDIT - Copyright 2019 Marc A. Lehmann <pbcbedit@schmorp.de>
5	#	5	#
6	# SPDX-License-Identifier: GPL-3.0-or-later	6	# SPDX-License-Identifier: GPL-3.0-or-later
…		…
17	#	17	#
18	# You should have received a copy of the GNU General Public License	18	# You should have received a copy of the GNU General Public License
19	# along with this program. If not, see <https://www.gnu.org/licenses/>.	19	# along with this program. If not, see <https://www.gnu.org/licenses/>.
20	#	20	#
21		21
22	use 5.014; # numerous features	22	use 5.016; # numerous features need 5.14, __SUB__ needs 5.16
23		23
24	our $VERSION = '1.0';	24	our $VERSION = '1.5';
25	our $JSON_VERSION = 1; # the versiobn of the json objects generated by this program	25	our $JSON_VERSION = 3; # the version of the json objects generated by this program
		26
		27	our $CHANGELOG = <<EOF;
		28
		29	1.5 Mon Nov 25 15:54:34 CET 2019
		30	- add "del" edit instruction.
		31	- work around lsblk bug sometimes giving "dos" pttype for gpt partitions.
		32	- bootmenupolicy in synopsis must be set to 0 to get the text menu.
		33	- minor doc fxes.
		34	- disable use of perldoc for help, doesn't work well.
		35
		36	1.4 Thu Aug 22 10:48:22 CEST 2019
		37	- new "create" subcommand.
		38	- "create" and "edit" try to save and restore ownership/permissions
		39	of bcd hives when writing the new file.
		40	- editorial fixes to the documentation.
		41	- add mininmal hive creation example.
		42
		43	1.3 Sat Aug 17 07:04:15 CEST 2019
		44	- output of pbcdedit elements --json has changed, as it didn't
		45	take the reorganisation by classes fully into account.
		46	- json schema bumped to 3.
		47	- new "bcd-device" and "bcd-legacy-device" subcommands.
		48	- implement --json option for lsblk.
		49
		50	1.2 Fri Aug 16 00:20:41 CEST 2019
		51	- bcd element names now depend on the bcd object type they are in,
		52	also affects "elements" output.
		53	- json schema bumped to 2.
		54	- new version command.
		55	- numerous minor bugfixes.
		56
		57	EOF
26		58
27	=head1 NAME	59	=head1 NAME
28		60
29	pbcdedit - portable boot configuration data (BCD) store editor	61	pbcdedit - portable boot configuration data (BCD) store editor
30		62
31	=head1 SYNOPSIS	63	=head1 SYNOPSIS
32		64
33	pbcdedit help # output manual page	65	pbcdedit help # output manual page
		66	pbcdedit version # output version and changelog
		67
34	pbcdedit export path/to/BCD # output BCD hive as JSON	68	pbcdedit export path/to/BCD # output BCD hive as JSON
35	pbcdedit import path/to/bcd # convert standard input to BCD hive	69	pbcdedit import path/to/BCD # convert standard input to BCD hive
36	pbcdedit edit path/to/BCD edit-instructions...	70	pbcdedit edit path/to/BCD edit-instructions...
37		71
38	pbcdedit objects # list all supported object aliases and types	72	pbcdedit objects # list all supported object aliases and types
39	pbcdedit elements # list all supported bcd element aliases	73	pbcdedit elements # list all supported bcd element aliases
40		74
		75	# Example: enable text-based boot menu.
		76	pbcdedit edit /my/BCD set '{default}' bootmenupolicy 0
		77
		78	# Example change system device to first partition containing winload.
		79	pbcdedit edit /my/BCD \
		80	set '{default}' device 'locate=<null>,element,path' \
		81	set '{default}' osdevice 'locate=<null>,element,path'
		82
		83
41	=head1 DESCRIPTION	84	=head1 DESCRIPTION
42		85
43	This program allows you to create, read and modify Boot Configuration Data	86	This program allows you to create, read and modify Boot Configuration Data
44	(BCD) stores used by Windows Vista and newer versions of Windows.	87	(BCD) stores used by Windows Vista and newer versions of Windows.
45		88
		89	At this point, it is in relatively early stages of development and has
		90	received little to no real-world testing.
		91
46	Compared to other BCD editing programs it offers the following unique	92	Compared to other BCD editing programs it offers the following unique
47	features:	93	features:
48		94
49	=over	95	=over
50		96
…		…
55		101
56	=item Does not rely on Windows	102	=item Does not rely on Windows
57		103
58	As the "portable" in the name implies, this program does not rely on	104	As the "portable" in the name implies, this program does not rely on
59	C<bcdedit> or other windows programs or libraries, it works on any system	105	C<bcdedit> or other windows programs or libraries, it works on any system
60	that supports at least perl version 5.14.	106	that supports at least perl version 5.16.
61		107
62	=item Decodes and encodes BCD device elements	108	=item Decodes and encodes BCD device elements
63		109
64	PBCDEDIT can concisely decode and encode BCD device element contents. This	110	PBCDEDIT can concisely decode and encode BCD device element contents. This
65	is pretty unique, and offers a lot of potential that can't be realised	111	is pretty unique, and offers a lot of potential that can't be realised
…		…
72	sensitive data.	118	sensitive data.
73		119
74	=back	120	=back
75		121
76	The target audience for this program is professionals and tinkerers who	122	The target audience for this program is professionals and tinkerers who
77	are rewady to invest time into learning how it works. It is not an easy	123	are ready to invest time into learning how it works. It is not an easy
78	program to use and requires patience and a good understanding of BCD data	124	program to use and requires patience and a good understanding of BCD
79	stores.	125	stores.
80		126
81		127
82	=head1 SUBCOMMANDS	128	=head1 SUBCOMMANDS
83		129
84	PCBEDIT expects a subcommand as first argument that tells it what to	130	PBCDEDIT expects a subcommand as first argument that tells it what to
85	do. The following subcommands exist:	131	do. The following subcommands exist:
86		132
87	=over	133	=over
88		134
89	=item help	135	=item C<help>
90		136
91	Displays the whole manuale page (this document).	137	Displays the whole manual page (this document).
92		138
		139	=item C<version>
		140
		141	This outputs the PBCDEDIT version, the JSON schema version it uses and the
		142	full log of changes.
		143
93	=item export F<path>	144	=item C<export> F<path>
94		145
95	Reads a BCD data store and writes a JSON representation of it to standard	146	Reads a BCD data store and writes a JSON representation of it to standard
96	output.	147	output.
97		148
98	The format of the data is explained later in this document.	149	The format of the data is explained later in this document.
99		150
100	Example: read a BCD store, modify it wiht an extenral program, write it again.	151	Example: read a BCD store, modify it with an external program, write it
		152	again.
101		153
102	pbcdedit export BCD | modify-json-somehow | pbcdedit import BCD	154	pbcdedit export BCD | modify-json-somehow | pbcdedit import BCD
103		155
104	=item import F<path>	156	=item C<import> F<path>
105		157
106	The reverse of C<export>: Reads a JSON representation of a BCD data store	158	The reverse of C<export>: Reads a JSON representation of a BCD data store
107	from standard input, and creates or replaces the given BCD data store.	159	from standard input, and creates or replaces the given BCD data store.
108		160
109	=item edit F<path> instructions...	161	=item C<edit> F<path> I<instructions...>
110		162
111	#TODO	163	Load a BCD data store, apply some instructions to it, and save it again.
112		164
113	=item lsblk	165	See the section L<EDITING BCD STORES>, below, for more info.
		166
		167	=item C<parse> F<path> I<instructions...>
		168
		169	Same as C<edit>, above, except it doesn't save the data store again. Can
		170	be useful to extract some data from it.
		171
		172	=item C<create> F<path> I<instructions...>
		173
		174	Same as C<edit>, above, except it creates a new data store from scratch if
		175	needed. An existing store will be emptied completely.
		176
		177	=item C<lsblk> [C<--json>]
114		178
115	On a GNU/Linux system, you can get a list of partition device descriptors	179	On a GNU/Linux system, you can get a list of partition device descriptors
116	using this command - the external C<lsblk> command is required, as well as	180	using this command - the external C<lsblk> command is required, as well as
117	a mounted C</sys> file system.	181	a mounted C</sys> file system.
118		182
119	The output will be a list of all partitions in the system and C<partition>	183	The output will be a list of all partitions in the system and C<partition>
120	descriptors for GPT and both C<legacypartition> and C<partition>	184	descriptors for GPT and both C<legacypartition> and C<partition>
121	descritpors for MBR partitions.	185	descriptors for MBR partitions.
122		186
		187	With C<--json> it will print similar information as C<lsblk --json>, but
		188	with extra C<bcd_device> and C<bcd_legacy_device> attributes.
		189
		190	=item C<bcd-device> F<path>
		191
		192	Tries to find the BCD device element for the given device, which currently
		193	must be a a partition of some kind. Prints the C<partition=> descriptor as
		194	a result, or nothing. Exit status will be true on success, and false on
		195	failure.
		196
		197	Like C<lsblk>, above, this likely only works on GNU/Linux systems.
		198
		199	Example: print the partition descriptor of tghe partition with label DATA.
		200
		201	$ pbcdedit bcd-device /dev/disk/by-label/DATA
		202	partition=<null>,harddisk,mbr,47cbc08a,213579202560
		203
		204	=item C<bcd-legacy-device> F<path>
		205
		206	Like above, but uses a C<legacypartition> descriptor instead.
		207
123	=item objects [--json]	208	=item C<objects> [C<--json>]
124		209
125	Outputs two tables: a table listing all type aliases with their hex bcd	210	Outputs two tables: a table listing all type aliases with their hex BCD
126	element ID, and all object name aliases with their GUID and default type	211	element ID, and all object name aliases with their GUID and default type
127	(if any).	212	(if any).
128		213
129	With C<--json> it prints similar information as a JSON object, for easier parsing.	214	With C<--json> it prints similar information as a JSON object, for easier parsing.
130		215
131	=item elements [--json]	216	=item C<elements> [C<--json>]
132		217
133	Outputs a table of known element aliases with their hex ID and the format	218	Outputs a table of known element aliases with their hex ID and the format
134	type.	219	type.
135		220
136	With C<--json> it prints similar information as a JSON object, for easier parsing.	221	With C<--json> it prints similar information as a JSON object, for easier parsing.
137		222
138	=item export-regf F<path>	223	=item C<export-regf> F<path>
139		224
140	This has nothing to do with BCD data stores - it takes a registry hive	225	This has nothing to do with BCD stores, but simply exposes PCBEDIT's
		226	internal registry hive reader - it takes a registry hive file as argument
141	file as argument and outputs a JSON representation of it to standard	227	and outputs a JSON representation of it to standard output.
142	output.
143		228
144	Hive versions 1.2 till 1.6 are supported.	229	Hive versions 1.2 till 1.6 are supported.
145		230
146	=item import-regf F<path>	231	=item C<import-regf> F<path>
147		232
148	The reverse of C<export-regf>: reads a JSON representation of a registry	233	The reverse of C<export-regf>: reads a JSON representation of a registry
149	hive from standard input and creates or replaces the registry hive file given as	234	hive from standard input and creates or replaces the registry hive file
150	argument.	235	given as argument.
151		236
152	The written hive will always be in a slightly modified version 1.3	237	The written hive will always be in a slightly modified version 1.3
153	format. It's not the format windows would generate, but it should be	238	format. It's not the format windows would generate, but it should be
154	understood by any conformant hive reader.	239	understood by any conformant hive reader.
155		240
156	Note that the representation chosen by PBCDEDIT currently throws away	241	Note that the representation chosen by PBCDEDIT currently throws away
157	clasname data (often used for feeble attemtps at hiding stuff by	242	classname data (often used for feeble attempts at hiding stuff by
158	Microsoft) and security descriptors, so if you write anything other than	243	Microsoft) and security descriptors, so if you write anything other than
159	a BCD hive you will most likely destroy it.	244	a BCD hive you will most likely destroy it.
160		245
161	=back	246	=back
162		247
163		248
164	=head1 BCD DATA STORE REPRESENTATION FORMAT	249	=head1 BCD STORE REPRESENTATION FORMAT
165		250
166	A BCD data store is represented as a JSON object with one special key,	251	A BCD data store is represented as a JSON object with one special key,
167	C<meta>, and one key per BCD object. That is, each BCD object becomes	252	C<meta>, and one key per BCD object. That is, each BCD object becomes
168	one key-value pair in the object, and an additional key called C<meta>	253	one key-value pair in the object, and an additional key called C<meta>
169	contains meta information.	254	contains meta information.
…		…
205	}	290	}
206		291
207	=head2 Minimal BCD to boot windows	292	=head2 Minimal BCD to boot windows
208		293
209	Experimentally I found the following BCD is the minimum required to	294	Experimentally I found the following BCD is the minimum required to
210	successfully boot any post-XP version of Windows (suitable C<device> and	295	successfully boot any post-XP version of Windows (assuming suitable
211	C<osdevice> values, of course):	296	C<device> and C<osdevice> values, of course, and assuming a BIOS boot -
		297	for UEFI, you should use F<winload.efi> instead of F<winload.exe>):
212		298
213	{	299	{
214	"{bootmgr}" : {	300	"{bootmgr}" : {
215	"resumeobject" : "{45b547a7-8ca6-4417-9eb0-a257b61f35b4}"	301	"default" : "{45b547a7-8ca6-4417-9eb0-a257b61f35b4}"
216	},	302	},
217		303
218	"{45b547a7-8ca6-4417-9eb0-a257b61f35b1}" : {	304	"{45b547a7-8ca6-4417-9eb0-a257b61f35b1}" : {
219	"type" : "application::osloader",	305	"type" : "application::osloader",
220	"description" : "Windows Boot",	306	"description" : "Windows Boot",
…		…
227		313
228	Note that minimal doesn't mean recommended - Windows itself will add stuff	314	Note that minimal doesn't mean recommended - Windows itself will add stuff
229	to this during or after boot, and you might or might not run into issues	315	to this during or after boot, and you might or might not run into issues
230	when installing updates as it might not be able to find the F<bootmgr>.	316	when installing updates as it might not be able to find the F<bootmgr>.
231		317
		318	This is how you would create a minimal hive with PBCDEDIT from within
		319	GNU/Linux, assuming F</dev/sdc3> is the windows partition, using
		320	a random GUID for the osloader and using C<partition> instead of
		321	C<legacypartition>:
		322
		323	osldr="{$(uuidgen)}"
		324	part=$(pbcdedit bcd-device /dev/sdc3)
		325	pbcdedit create minimal.bcd \
		326	set '{bootmgr}' default "$osldr" \
		327	set "$osldr" type application::osloader \
		328	set "$osldr" description 'Windows Boot' \
		329	set "$osldr" device "$part" \
		330	set "$osldr" osdevice "$part" \
		331	set "$osldr" path '\Windows\system32\winload.exe' \
		332	set "$osldr" systemroot '\Windows'
		333
232	=head2 The C<meta> key	334	=head2 The C<meta> key
233		335
234	The C<meta> key is not stored in the BCD data store but is used only	336	The C<meta> key is not stored in the BCD data store but is used only
235	by PBCDEDIT. It is always generated when exporting, and importing will	337	by PBCDEDIT. It is always generated when exporting, and importing will
236	be refused when it exists and the version stored inside doesn't store	338	be refused when it exists and the version stored inside doesn't match
237	the JSON schema version of PBCDEDIT. This ensures that differemt and	339	the JSON schema version of PBCDEDIT. This ensures that different and
238	incompatible versions of PBCDEDIT will not read and misinterüret each	340	incompatible versions of PBCDEDIT will not read and misinterpret each
239	others data.	341	others data.
240		342
241	=head2 The object keys	343	=head2 The object keys
242		344
243	Every other key is a BCD object. There is usually a BCD object for the	345	Every other key is a BCD object. There is usually a BCD object for the
244	boot manager, one for every boot option and a few others that store common	346	boot manager, one for every boot option and a few others that store common
245	settings inherited by these.	347	settings inherited by these.
246		348
247	Each BCD object is represented by a GUID wrapped in curly braces. These	349	Each BCD object is represented by a GUID wrapped in curly braces. These
248	are usually random GUIDs used only to distinguish bCD objects from each	350	are usually random GUIDs used only to distinguish BCD objects from each
249	other. When adding a new boot option, you can simply generate a new GUID.	351	other. When adding a new boot option, you can simply generate a new GUID.
250		352
251	Some of these GUIDs are fixed well known GUIDs which PBCDEDIT will decode	353	Some of these GUIDs are fixed well known GUIDs which PBCDEDIT will decode
252	into human-readable strings such as C<{globalsettings}>, which is the same	354	into human-readable strings such as C<{globalsettings}>, which is the same
253	as C<{7ea2e1ac-2e61-4728-aaa3-896d9d0a9f0e}>.	355	as C<{7ea2e1ac-2e61-4728-aaa3-896d9d0a9f0e}>.
254		356
255	Each BCD, object has an associated type. For example,	357	Each BCD object has an associated type. For example,
256	C<application::osloader> for objects loading Windows via F<winload.exe>,	358	C<application::osloader> for objects loading Windows via F<winload.exe>,
257	C<application::bootsector> for real mode applications and so on.	359	C<application::bootsector> for real mode applications and so on.
258		360
259	The type of a object is stored in the pseudo BCD element C<type> (see next	361	The type of a object is stored in the pseudo BCD element C<type> (see next
260	section).	362	section).
…		…
287	get a list of all BCD elements known to PBCDEDIT by running F<pbcdedit	389	get a list of all BCD elements known to PBCDEDIT by running F<pbcdedit
288	elements>.	390	elements>.
289		391
290	What was said about duplicate keys mapping to the same object is true for	392	What was said about duplicate keys mapping to the same object is true for
291	elements as well, so, again, you should always use the canonical name,	393	elements as well, so, again, you should always use the canonical name,
292	whcih is the human radable alias, if known.	394	which is the human readable alias, if known.
293		395
294	=head3 BCD element types	396	=head3 BCD element types
295		397
296	Each BCD element has a type such as I<string> or I<boolean>. This type	398	Each BCD element has a type such as I<string> or I<boolean>. This type
297	determines how the value is interpreted, and most of them are pretty easy	399	determines how the value is interpreted, and most of them are pretty easy
…		…
309	"description" : "Windows 10",	411	"description" : "Windows 10",
310	"systemroot" : "\\Windows",	412	"systemroot" : "\\Windows",
311		413
312	=item boolean	414	=item boolean
313		415
314	Almost as simnple are booleans, which represent I<true>/I<false>,	416	Almost as simple are booleans, which represent I<true>/I<false>,
315	I<on>/I<off> and similar values. In the JSON form, true is represented	417	I<on>/I<off> and similar values. In the JSON form, true is represented
316	by the number C<1>, and false is represented by the number C<0>. Other	418	by the number C<1>, and false is represented by the number C<0>. Other
317	values will be accepted, but PBCDEDIT doesn't guarantee how these are	419	values will be accepted, but PBCDEDIT doesn't guarantee how these are
318	interpreted.	420	interpreted.
319		421
…		…
323		425
324	"displaybootmenu" : 0,	426	"displaybootmenu" : 0,
325		427
326	=item integer	428	=item integer
327		429
328	Again, very simple, this is a 64 bit integer. IT can be either specified	430	Again, very simple, this is a 64 bit integer. It can be either specified
329	as a decimal number, as a hex number (by prefixing it with C<0x>) or as a	431	as a decimal number, as a hex number (by prefixing it with C<0x>) or as a
330	binatry number (prefix C<0b>).	432	binary number (prefix C<0b>).
331		433
332	For example, the boot C<timeout> is an integer, specifying the automatic	434	For example, the boot C<timeout> is an integer, specifying the automatic
333	boot delay in seconds:	435	boot delay in seconds:
334		436
335	"timeout" : 30,	437	"timeout" : 30,
336		438
337	=item integer list	439	=item integer list
338		440
339	This is a list of 64 bit integers separated by whitespace. It is not used	441	This is a list of 64 bit integers separated by whitespace. It is not used
340	much, so here is a somewhat artificial an untested exanmple of using	442	much, so here is a somewhat artificial and untested example of using
341	C<customactions> to specify a certain custom, eh, action to be executed	443	C<customactions> to specify a certain custom, eh, action to be executed
342	when pressing C<F10> at boot:	444	when pressing C<F10> at boot:
343		445
344	"customactions" : "0x1000044000001 0x54000001",	446	"customactions" : "0x1000044000001 0x54000001",
345		447
346	=item guid	448	=item guid
347		449
348	This represents a single GUID value wrqapped in curly braces. It is used a	450	This represents a single GUID value wrapped in curly braces. It is used a
349	lot to refer from one BCD object to other one.	451	lot to refer from one BCD object to other one.
350		452
351	For example, The C<{bootmgr}> object might refer to a resume boot option	453	For example, The C<{bootmgr}> object might refer to a resume boot option
352	using C<resumeobject>:	454	using C<default>:
353		455
354	"resumeobject" : "{7ae02178-821d-11e7-8813-1c872c5f5ab0}",	456	"default" : "{7ae02178-821d-11e7-8813-1c872c5f5ab0}",
355		457
356	Human readable aliases are used and allowed.	458	Human readable aliases are used and allowed.
357		459
358	=item guid list	460	=item guid list
359		461
360	Similar to te guid type, this represents a list of such GUIDs, separated	462	Similar to the GUID type, this represents a list of such GUIDs, separated
361	by whitespace from each other.	463	by whitespace from each other.
362		464
363	For example, many BCD objects can I<inherit> elements from other BCD	465	For example, many BCD objects can I<inherit> elements from other BCD
364	objects by specifying the GUIDs of those other objects ina GUID list	466	objects by specifying the GUIDs of those other objects in a GUID list
365	called surprisingly called C<inherit>:	467	called surprisingly called C<inherit>:
366		468
367	"inherit" : "{dbgsettings} {emssettings} {badmemory}",	469	"inherit" : "{dbgsettings} {emssettings} {badmemory}",
368		470
369	This example also shows how human readable aliases can be used.	471	This example also shows how human readable aliases can be used.
…		…
373	This type is why I write I<most> are easy to explain earlier: This type	475	This type is why I write I<most> are easy to explain earlier: This type
374	is the pinnacle of Microsoft-typical hacks layered on top of other	476	is the pinnacle of Microsoft-typical hacks layered on top of other
375	hacks. Understanding this type took more time than writing all the rest of	477	hacks. Understanding this type took more time than writing all the rest of
376	PBCDEDIT, and because it is so complex, this type has its own subsection	478	PBCDEDIT, and because it is so complex, this type has its own subsection
377	below.	479	below.
		480
378	=back	481	=back
379		482
380	=head4 The BCD "device" element type	483	=head3 The BCD "device" element type
381		484
382	Device elements specify, well, devices. They are used for such diverse	485	Device elements specify, well, devices. They are used for such diverse
383	purposes such as finding a TFTP network boot imagem serial ports or VMBUS	486	purposes such as finding a TFTP network boot image, serial ports or VMBUS
384	devices, but most commonly they are used to specify the disk (harddisk,	487	devices, but most commonly they are used to specify the disk (harddisk,
385	cdrom ramdisk, vhd...) to boot from.	488	cdrom, ramdisk, vhd...) to boot from.
386		489
387	The device element is kind of a mini-language in its own which is much	490	The device element is kind of a mini-language in its own which is much
388	more versatile then the limited windows interface to it - BCDEDIT -	491	more versatile then the limited windows interface to it - BCDEDIT -
389	reveals.	492	reveals.
390		493
…		…
393	element, so almost everything known about it had to be researched first	496	element, so almost everything known about it had to be researched first
394	in the process of writing this script, and consequently, support for BCD	497	in the process of writing this script, and consequently, support for BCD
395	device elements is partial only.	498	device elements is partial only.
396		499
397	On the other hand, the expressive power of PBCDEDIT in specifying devices	500	On the other hand, the expressive power of PBCDEDIT in specifying devices
398	is much bigger than BCDEDIT and therefore more cna be don with it. The	501	is much greater than BCDEDIT and therefore more can be done with it. The
399	downside is that BCD device elements are much more complicated than what	502	downside is that BCD device elements are much more complicated than what
400	you might think from reading the BCDEDIT documentation.	503	you might think from reading the BCDEDIT documentation.
401		504
402	In other words, simple things are complicated, and complicated things are	505	In other words, simple things are complicated, and complicated things are
403	possible.	506	possible.
404		507
405	Anyway, the general syntax of device elements is an optional GUID,	508	Anyway, the general syntax of device elements is an optional GUID,
406	followed by a device type, optionally followed by hexdecimal flags in	509	followed by a device type, optionally followed by hexadecimal flags in
407	angle brackets, optionally followed by C<=> and a comma-separated list of	510	angle brackets, optionally followed by C<=> and a comma-separated list of
408	arguments, some of which can be (and often are) in turn devices again.	511	arguments, some of which can be (and often are) in turn devices again.
409		512
410	[{GUID}]type[<flags>][=arg,arg...]	513	[{GUID}]type[<flags>][=arg,arg...]
411		514
412	Here are some examples:	515	Here are some examples:
413		516
414	boot	517	boot
415	{b097d29f-bc00-11e9-8a9a-525400123456}block=file,<boot>,\\EFI"	518	{b097d29f-bc00-11e9-8a9a-525400123456}block=file,<boot>,\EFI
416	locate=<null>,element,systemroot	519	locate=<null>,element,systemroot
417	partition=<null>,harddisk,mbr,47cbc08a,1048576	520	partition=<null>,harddisk,mbr,47cbc08a,1048576
418	partition=<null>,harddisk,gpt,9742e468-9206-48a0-b4e4-c4e9745a356a,76d39e5f-ad1b-407e-9c05-c81eb83b57dd	521	partition=<null>,harddisk,gpt,9742e468-9206-48a0-b4e4-c4e9745a356a,76d39e5f-ad1b-407e-9c05-c81eb83b57dd
419	block<1>=ramdisk,<partition=<null>,harddisk,mbr,47cbc08a,68720525312>,0,0,0,\Recovery\b097d29e-bc00-11e9-8a9a-525400123456\Winre.wim	522	block<1>=ramdisk,<partition=<null>,harddisk,mbr,47cbc08a,68720525312>,0,0,0,\Recovery\b097d29e-bc00-11e9-8a9a-525400123456\Winre.wim
420	block=file,<partition=<null>,harddisk,gpt,9742e468-9206-48a0-b4e4-c4e9745a356a,ee3a393a-f0de-4057-9946-88584245ed48>,\	523	block=file,<partition=<null>,harddisk,gpt,9742e468-9206-48a0-b4e4-c4e9745a356a,ee3a393a-f0de-4057-9946-88584245ed48>,\
…		…
437	The types understood and used by PBCDEDIT are as follows (keep in mind	540	The types understood and used by PBCDEDIT are as follows (keep in mind
438	that not of all the following is necessarily supported in PBCDEDIT):	541	that not of all the following is necessarily supported in PBCDEDIT):
439		542
440	=over	543	=over
441		544
442	=item binary=hex...	545	=item C<binary=>I<hex...>
443		546
444	This type isn't actually a real BCD element type, but a fallback for those	547	This type isn't actually a real BCD element type, but a fallback for those
445	cases where PBCDEDIT can't perfectly decode a device element (except for	548	cases where PBCDEDIT can't perfectly decode a device element (except for
446	the leading GUID, which it can always decode). In such cases, it will	549	the leading GUID, which it can always decode). In such cases, it will
447	convert the device into this type with a hexdump of the element data.	550	convert the device into this type with a hexdump of the element data.
448		551
449	=item null	552	=item C<null>
450		553
451	This is another special type - sometimes, a device all zero-filled, which	554	This is another special type - sometimes, a device is all zero-filled,
452	is not valid. This can mark the absence of a device or something PBCDEDIT	555	which is not valid. This can mark the absence of a device or something
453	does not understand, so it decodes it into this special "all zero" type	556	PBCDEDIT does not understand, so it decodes it into this special "all
454	called C<null>.	557	zero" type called C<null>.
455		558
456	It's most commonly found in devices that can use an optional parent	559	It's most commonly found in devices that can use an optional parent
457	device, when no parent device is used.	560	device, when no parent device is used.
458		561
459	=item boot	562	=item C<boot>
460		563
461	Another type without parameters, this refers to the device that was booted	564	Another type without parameters, this refers to the device that was booted
462	from (nowadays typically the EFI system partition).	565	from (nowadays typically the EFI system partition).
463		566
464	=item vmbus=interfacetype,interfaceinstance	567	=item C<vmbus=>I<interfacetype>,I<interfaceinstance>
465		568
466	This specifies a VMBUS device with the given interface type and interface	569	This specifies a VMBUS device with the given interface type and interface
467	instance, both of which are "naked" (no curly braces) GUIDs.	570	instance, both of which are "naked" (no curly braces) GUIDs.
468		571
469	Made-up example (couldn't find a single example on the web):	572	Made-up example (couldn't find a single example on the web):
470		573
471	vmbus=c376c1c3-d276-48d2-90a9-c04748072c60,12345678-a234-b234-c234-d2345678abcd	574	vmbus=c376c1c3-d276-48d2-90a9-c04748072c60,12345678-a234-b234-c234-d2345678abcd
472		575
473	=item partition=<parent>,devicetype,partitiontype,diskid,partitionid	576	=item C<partition=><I<parent>>,I<devicetype>,I<partitiontype>,I<diskid>,I<partitionid>
474		577
475	This designates a specific partition on a block device. C<< <parent>	578	This designates a specific partition on a block device. I<parent> is an
476	>> is an optional parent device on which to search on, and is often	579	optional parent device on which to search on, and is often C<null>. Note
477	C<null>. Note that the anfgle brackets are part of the syntax.	580	that the angle brackets around I<parent> are part of the syntax.
478		581
479	C<devicetypes> is one of C<harddisk>, C<floppy>, C<cdrom>, C<ramdisk>,	582	I<devicetypes> is one of C<harddisk>, C<floppy>, C<cdrom>, C<ramdisk>,
480	C<file> or C<vhd>, where the first three should be self-explaining,	583	C<file> or C<vhd>, where the first three should be self-explaining,
481	C<file> is usually used to locate a device by finding a magic file, and	584	C<file> is usually used to locate a file to be used as a disk image,
482	C<vhd> is used for virtual harddisks - F<.vhd> and F<-vhdx> files.	585	and C<vhd> is used to treat files as virtual harddisks, i.e. F<vhd> and
		586	F<vhdx> files.
483		587
484	The C<partitiontype> is either C<mbr>, C<gpt> or C<raw>, the latter being	588	The I<partitiontype> is either C<mbr>, C<gpt> or C<raw>, the latter being
485	used for devices without partitions, such as cdroms, where the "partition"	589	used for devices without partitions, such as cdroms, where the "partition"
486	is usually the whole device.	590	is usually the whole device.
487		591
488	The C<diskid> identifies the disk or device using a unique signature, and	592	The I<diskid> identifies the disk or device using a unique signature, and
489	the same is true for the C<partitionid>. How these are interpreted depends	593	the same is true for the I<partitionid>. How these are interpreted depends
490	on the C<partitiontype>:	594	on the I<partitiontype>:
491		595
492	=over	596	=over
493		597
494	=item mbr	598	=item C<mbr>
495		599
496	The C<diskid> is the 32 bit disk signature stored at offset 0x1b8 in the	600	The C<diskid> is the 32 bit disk signature stored at offset 0x1b8 in the
497	MBR, interpreted as a 32 bit unsigned little endian integer and written as	601	MBR, interpreted as a 32 bit unsigned little endian integer and written as
498	hex number. That is, the bytes C<01 02 03 04> would become C<04030201>.	602	hex number. That is, the bytes C<01 02 03 04> would become C<04030201>.
499		603
500	Diskpart (using the C<DETAIL> command) and the C<lsblk> comamnd typically	604	Diskpart (using the C<DETAIL> command) and the C<lsblk> command typically
501	found on GNU/Linux systems (using e.g. C<lsblk -o NAME,PARTUUID>) can	605	found on GNU/Linux systems (using e.g. C<lsblk -o NAME,PARTUUID>) can
502	display the disk id.	606	display the I<diskid>.
503		607
504	The C<partitionid> is the byte offset(!) of the partition counting from	608	The I<partitionid> is the byte offset(!) of the partition counting from
505	the beginning of the MBR.	609	the beginning of the MBR.
506		610
507	Example, use the partition on the harddisk with C<diskid> C<47cbc08a>	611	Example, use the partition on the harddisk with I<diskid> C<47cbc08a>
508	starting at sector C<2048> (= 1048576 / 512).	612	starting at sector C<2048> (= 1048576 / 512).
509		613
510	partition=<null>,harddisk,mbr,47cbc08a,1048576	614	partition=<null>,harddisk,mbr,47cbc08a,1048576
511		615
512	=item gpt	616	=item C<gpt>
513		617
514	The C<diskid> is the disk UUID/disk identifier GUID from the partition	618	The I<diskid> is the disk GUID/disk identifier GUID from the partition
515	table (as displayed e.g. by C<gdisk>), and the C<partitionid> is the	619	table (as displayed e.g. by F<gdisk>), and the I<partitionid> is the
516	partition unique GUID (displayed using e.g. the C<gdisk> C<i> command).	620	partition unique GUID (displayed using e.g. the F<gdisk> F<i> command).
517		621
518	Example: use the partition C<76d39e5f-ad1b-407e-9c05-c81eb83b57dd> on GPT	622	Example: use the partition C<76d39e5f-ad1b-407e-9c05-c81eb83b57dd> on GPT
519	disk C<9742e468-9206-48a0-b4e4-c4e9745a356a>.	623	disk C<9742e468-9206-48a0-b4e4-c4e9745a356a>.
520		624
521	partition=<null>,harddisk,gpt,9742e468-9206-48a0-b4e4-c4e9745a356a,76d39e5f-ad1b-407e-9c05-c81eb83b57dd	625	partition=<null>,harddisk,gpt,9742e468-9206-48a0-b4e4-c4e9745a356a,76d39e5f-ad1b-407e-9c05-c81eb83b57dd
522		626
523	=item raw	627	=item C<raw>
524		628
525	Instead of diskid and partitionid, this type only accepts a decimal disk	629	Instead of I<diskid> and I<partitionid>, this type only accepts a decimal
526	number and signifies the whole disk. BCDEDIT cannot display the resulting	630	disk number and signifies the whole disk. BCDEDIT cannot display the
527	device, and I am doubtful whether it has a useful effect.	631	resulting device, and I am doubtful whether it has a useful effect.
528		632
529	=back	633	=back
530		634
531	=item legacypartition=<parent>,devicetype,partitiontype,diskid,partitionid	635	=item C<legacypartition=><I<parent>>,I<devicetype>,I<partitiontype>,I<diskid>,I<partitionid>
532		636
533	This is exactly the same as the C<partition> type, except for a tiny	637	This is exactly the same as the C<partition> type, except for a tiny
534	detail: instead of using the partition start offset, this type uses the	638	detail: instead of using the partition start offset, this type uses the
535	partition number for MBR disks. Behaviour other partition types should be	639	partition number for MBR disks. Behaviour other partition types should be
536	the same.	640	the same.
537		641
538	The partition number starts at C<1> and skips unused partition, so if	642	The partition number starts at C<1> and skips unused partition, so if
539	there are two primary partitions and another partition inside the extended	643	there are two primary partitions and another partition inside the extended
540	partition, the primary partitions are number C<1> and C<2> and the	644	partition, the primary partitions are number C<1> and C<2> and the
541	partition inside the extended partition is number C<3>, rwegardless of any	645	partition inside the extended partition is number C<3>, regardless of any
542	gaps.	646	gaps.
543		647
544	=item locate=<parent>,locatetype,locatearg	648	=item C<locate=><I<parent>>,I<locatetype>,I<locatearg>
545		649
546	This device description will make the bootloader search for a partition	650	This device description will make the bootloader search for a partition
547	with a given path.	651	with a given path.
548		652
549	The C<< <parent> >> device is the device to search on (angle brackets are	653	The I<parent> device is the device to search on (angle brackets are
550	still part of the syntax!) If it is C<< <null> >>, then C<locate> will	654	still part of the syntax!) If it is C<null>, then C<locate> will
551	search all disks it can find.	655	search all disks it can find.
552		656
553	C<locatetype> is either C<element> or C<path>, and merely distinguishes	657	I<locatetype> is either C<element> or C<path>, and merely distinguishes
554	between two different ways to specify the path to search for: C<element>	658	between two different ways to specify the path to search for: C<element>
555	uses an element ID (either as hex or as name) as C<locatearg> and C<path>	659	uses an element ID (either as hex or as name) as I<locatearg> and C<path>
556	uses a relative path as C<locatearg>.	660	uses a relative path as I<locatearg>.
557		661
558	Example: find any partition which has the C<magicfile.xxx> path in the	662	Example: find any partition which has the F<magicfile.xxx> path in the
559	root.	663	root.
560		664
561	locate=<null>,path,\magicfile.xxx	665	locate=<null>,path,\magicfile.xxx
562		666
563	Example: find any partition which has the path specified in the	667	Example: find any partition which has the path specified in the
564	C<systemroot> element (typically C<\Windows>).	668	C<systemroot> element (typically F<\Windows>).
565		669
566	locate=<null>,element,systemroot	670	locate=<null>,element,systemroot
567		671
568	=item block=devicetype,args...	672	=item C<block=>I<devicetype>,I<args...>
569		673
570	Last not least, the most complex type, C<block>, which... specifies block	674	Last not least, the most complex type, C<block>, which... specifies block
571	devices (which could be inside a F<vhdx> file for example).	675	devices (which could be inside a F<vhdx> file for example).
572		676
573	C<devicetypes> is one of C<harddisk>, C<floppy>, C<cdrom>, C<ramdisk>,	677	I<devicetypes> is one of C<harddisk>, C<floppy>, C<cdrom>, C<ramdisk>,
574	C<file> or C<vhd> - the same as for C<partiion=>.	678	C<file> or C<vhd> - the same as for C<partition=>.
575		679
576	The remaining arguments change depending on the C<devicetype>:	680	The remaining arguments change depending on the I<devicetype>:
577		681
578	=over	682	=over
579		683
580	=item block=file,<parent>,path	684	=item C<block=file>,<I<parent>>,I<path>
581		685
582	Interprets the C<< <parent> >> device (typically a partition) as a	686	Interprets the I<parent> device (typically a partition) as a
583	filesystem and specifies a file path inside.	687	filesystem and specifies a file path inside.
584		688
585	=item block=vhd,<parent>	689	=item C<block=vhd>,<I<parent>>
586		690
587	Pretty much just changes the interpretation of C<< <parent> >>, which is	691	Pretty much just changes the interpretation of I<parent>, which is
588	usually a disk image (C<block=file,...)>) to be a F<vhd> or F<vhdx> file.	692	usually a disk image (C<block=file,...)>) to be a F<vhd> or F<vhdx> file.
589		693
590	=item block=ramdisk,<parent>,base,size,offset,path	694	=item C<block=ramdisk>,<I<parent>>,I<base>,I<size>,I<offset>,I<path>
591		695
592	Interprets the C<< <parent> >> device as RAM disk, using the (decimal)	696	Interprets the I<parent> device as RAM disk, using the (decimal)
593	base address, byte size and byte offset inside a file specified by	697	base address, byte size and byte offset inside a file specified by
594	C<path>. The numbers are usually all C<0> because they cna be extracted	698	I<path>. The numbers are usually all C<0> because they can be extracted
595	from the RAM disk image or other parameters.	699	from the RAM disk image or other parameters.
596		700
597	This is most commonly used to boot C<wim> images.	701	This is most commonly used to boot C<wim> images.
598		702
599	=item block=floppy,drivenum	703	=item C<block=floppy>,I<drivenum>
600		704
601	Refers to a removable drive identified by a number. BCDEDIT cannot display	705	Refers to a removable drive identified by a number. BCDEDIT cannot display
602	the resultinfg device, and it is not clear what effect it will have.	706	the resulting device, and it is not clear what effect it will have.
603		707
604	=item block=cdrom,drivenum	708	=item C<block=cdrom>,I<drivenum>
605		709
606	Pretty much the same as C<floppy> but for CD-ROMs.	710	Pretty much the same as C<floppy> but for CD-ROMs.
607		711
608	=item anything else	712	=item anything else
609		713
610	Probably not yet implemented. Tell me of your needs...	714	Probably not yet implemented. Tell me of your needs...
611		715
612	=back	716	=back
613		717
614	=back5 Examples	718	=back
		719
		720	=head4 Examples
615		721
616	This concludes the syntax overview for device elements, but probably	722	This concludes the syntax overview for device elements, but probably
617	leaves many questions open. I can't help with most of them, as I also ave	723	leaves many questions open. I can't help with most of them, as I also have
618	many questions, but I can walk you through some actual examples using mroe	724	many questions, but I can walk you through some actual examples using more
619	complex aspects.	725	complex aspects.
620		726
		727	=over
		728
621	=item locate=<block=vhd,<block=file,<locate=<null>,path,\disk.vhdx>,\disk.vhdx>>,element,path	729	=item C<< locate=<block=vhd,<block=file,<locate=<null>,path,\disk.vhdx>,\disk.vhdx>>,element,path >>
622		730
623	Just like with C declarations, you best treat device descriptors as	731	Just like with C declarations, you best treat device descriptors as
624	instructions to find your device and work your way from the inside out:	732	instructions to find your device and work your way from the inside out:
625		733
626	locate=<null>,path,\disk.vhdx	734	locate=<null>,path,\disk.vhdx
…		…
633	Next, this takes the device locate has found and finds a file called	741	Next, this takes the device locate has found and finds a file called
634	F<\disk.vhdx> on it. This is the same file locate was using, but that is	742	F<\disk.vhdx> on it. This is the same file locate was using, but that is
635	only because we find the device using the same path as finding the disk	743	only because we find the device using the same path as finding the disk
636	image, so this is purely incidental, although quite common.	744	image, so this is purely incidental, although quite common.
637		745
638	Bext, this file will be opened as a virtual disk:	746	Next, this file will be opened as a virtual disk:
639		747
640	block=vhd,<see above>	748	block=vhd,<see above>
641		749
642	And finally, inside this disk, another C<locate> will look for a partition	750	And finally, inside this disk, another C<locate> will look for a partition
643	with a path as specified in the C<path> element, which most likely will be	751	with a path as specified in the C<path> element, which most likely will be
…		…
646	locate=<see above>,element,path	754	locate=<see above>,element,path
647		755
648	As a result, this will boot the first Windows it finds on the first	756	As a result, this will boot the first Windows it finds on the first
649	F<disk.vhdx> disk image it can find anywhere.	757	F<disk.vhdx> disk image it can find anywhere.
650		758
651	=item locate=<block=vhd,<block=file,<partition=<null>,harddisk,mbr,47cbc08a,242643632128>,\win10.vhdx>>,element,path	759	=item C<< locate=<block=vhd,<block=file,<partition=<null>,harddisk,mbr,47cbc08a,242643632128>,\win10.vhdx>>,element,path >>
652		760
653	Pretty much the same as the previous case, but witzh a bit of variance. First, look for a specific partition on	761	Pretty much the same as the previous case, but with a bit of
654	an MBR-partitioned disk:	762	variance. First, look for a specific partition on an MBR-partitioned disk:
655		763
656	partition=<null>,harddisk,mbr,47cbc08a,242643632128	764	partition=<null>,harddisk,mbr,47cbc08a,242643632128
657		765
658	Then open the file F<\win10.vhdx> on that partition:	766	Then open the file F<\win10.vhdx> on that partition:
659		767
…		…
665		773
666	And again the windows loader (or whatever is in C<path>) will be searched:	774	And again the windows loader (or whatever is in C<path>) will be searched:
667		775
668	locate=<see above>,element,path	776	locate=<see above>,element,path
669		777
670	=item {b097d2b2-bc00-11e9-8a9a-525400123456}block<1>=ramdisk,<partition=<null>,harddisk,mbr,47cbc08a,242643632128>,0,0,0,\boot.wim	778	=item C<< {b097d2b2-bc00-11e9-8a9a-525400123456}block<1>=ramdisk,<partition=<null>,harddisk,mbr,47cbc08a,242643632128>,0,0,0,\boot.wim >>
671		779
672	This is quite different. First, it starts with a GUID. This GUID belongs	780	This is quite different. First, it starts with a GUID. This GUID belongs
673	to a BCD object of type C<device>, which has additional parameters:	781	to a BCD object of type C<device>, which has additional parameters:
674		782
675	"{b097d2b2-bc00-11e9-8a9a-525400123456}" : {	783	"{b097d2b2-bc00-11e9-8a9a-525400123456}" : {
…		…
678	"ramdisksdidevice" : "partition=<null>,harddisk,mbr,47cbc08a,1048576",	786	"ramdisksdidevice" : "partition=<null>,harddisk,mbr,47cbc08a,1048576",
679	"ramdisksdipath" : "\boot.sdi"	787	"ramdisksdipath" : "\boot.sdi"
680	},	788	},
681		789
682	I will not go into many details, but this specifies a (presumably empty)	790	I will not go into many details, but this specifies a (presumably empty)
683	template ramdisk image (F<\boot.sdi>) that is used to initiaolize the	791	template ramdisk image (F<\boot.sdi>) that is used to initialize the
684	ramdisk. The F<\boot.wim> file is then extracted into it. As you cna also	792	ramdisk. The F<\boot.wim> file is then extracted into it. As you can also
685	see, this F<.sdi> file resides on a different C<partition>.	793	see, this F<.sdi> file resides on a different C<partition>.
686		794
687	Continuitn, as always, form the inside out, first this device descriptor	795	Continuing, as always, from the inside out, first this device descriptor
688	finds a specific partition:	796	finds a specific partition:
689		797
690	partition=<null>,harddisk,mbr,47cbc08a,242643632128	798	partition=<null>,harddisk,mbr,47cbc08a,242643632128
691		799
692	And then specifies a C<ramdisk> image on this partition:	800	And then specifies a C<ramdisk> image on this partition:
693		801
694	block<1>=ramdisk,<see above>,0,0,0,\boot.wim	802	block<1>=ramdisk,<see above>,0,0,0,\boot.wim
695		803
696	I don't know what the purpose ofd the C<< <1> >> flag value is, but it	804	I don't know what the purpose of the C<< <1> >> flag value is, but it
697	seems to be always there on this kind of entry.	805	seems to be always there on this kind of entry.
698		806
		807	If you have some good examples to add here, feel free to mail me.
		808
		809	=back
		810
		811
		812	=head1 EDITING BCD STORES
		813
		814	The C<edit> and C<parse> subcommands allow you to read a BCD data store
		815	and modify it or extract data from it. This is done by executing a series
		816	of "editing instructions" which are explained here.
		817
		818	=over
		819
		820	=item C<get> I<object> I<element>
		821
		822	Reads the BCD element I<element> from the BCD object I<object> and writes
		823	it to standard output, followed by a newline. The I<object> can be a GUID
		824	or a human-readable alias, or the special string C<{default}>, which will
		825	refer to the default BCD object.
		826
		827	Example: find description of the default BCD object.
		828
		829	pbcdedit parse BCD get "{default}" description
		830
		831	=item C<set> I<object> I<element> I<value>
		832
		833	Similar to C<get>, but sets the element to the given I<value> instead.
		834
		835	Example: change the bootmgr default too
		836	C<{b097d2ad-bc00-11e9-8a9a-525400123456}>:
		837
		838	pbcdedit edit BCD set "{bootmgr}" default "{b097d2ad-bc00-11e9-8a9a-525400123456}"
		839
		840	=item C<del> I<object> I<element>
		841
		842	Similar to C<get>, but removed the BCD element from the specified BCD object.
		843
		844	=item C<eval> I<perlcode>
		845
		846	This takes the next argument, interprets it as Perl code and
		847	evaluates it. This allows you to do more complicated modifications or
		848	extractions.
		849
		850	The following variables are predefined for your use:
		851
		852	=over
		853
		854	=item C<$PATH>
		855
		856	The path to the BCD data store, as given to C<edit> or C<parse>.
		857
		858	=item C<$BCD>
		859
		860	The decoded BCD data store.
		861
		862	=item C<$DEFAULT>
		863
		864	The default BCD object name.
		865
		866	=back
		867
		868	The example given for C<get>, above, could be expressed like this with
		869	C<eval>:
		870
		871	pbcdedit edit BCD eval 'say $BCD->{$DEFAULT}{description}'
		872
		873	The example given for C<set> could be expressed like this:
		874
		875	pbcdedit edit BCD eval '$BCD->{"{bootmgr}"{default} = "{b097d2ad-bc00-11e9-8a9a-525400123456}"'
		876
		877	=item C<do> I<path>
		878
		879	Similar to C<eval>, above, but instead of using the argument as perl code,
		880	it loads the perl code from the given file and executes it. This makes it
		881	easier to write more complicated or larger programs.
		882
		883	=back
		884
699		885
700	=head1 SEE ALSO	886	=head1 SEE ALSO
701		887
702	For ideas on what you can do, and some introductory material, try	888	For ideas on what you can do with BCD stores in
		889	general, and some introductory material, try
703	L<http://www.mistyprojects.co.uk/documents/BCDEdit/index.html>.	890	L<http://www.mistyprojects.co.uk/documents/BCDEdit/index.html>.
704		891
705	For good reference on BCD objects and elements, see Geoff Chappels pages	892	For good reference on which BCD objects and
		893	elements exist, see Geoff Chappell's pages at
706	at L<http://www.geoffchappell.com/notes/windows/boot/bcd/index.htm>.	894	L<http://www.geoffchappell.com/notes/windows/boot/bcd/index.htm>.
707		895
708	=head1 AUTHOR	896	=head1 AUTHOR
709		897
710	Written by Marc A. Lehmann <pbcdedit@schmorp.de>.	898	Written by Marc A. Lehmann L<pbcdedit@schmorp.de>.
711		899
712	=head1 REPORTING BUGS	900	=head1 REPORTING BUGS
713		901
714	Bugs can be reported dorectly tt he author at L<pcbedit@schmorp.de>.	902	Bugs can be reported directly the author at L<pcbedit@schmorp.de>.
715		903
716	=head1 BUGS AND SHORTCOMINGS	904	=head1 BUGS AND SHORTCOMINGS
717		905
718	This should be a module. Of a series of modules, even.	906	This should be a module. Of a series of modules, even.
719		907
720	Registry code should preserve classname and security descriptor data, and	908	Registry code should preserve classname and security descriptor data, and
721	whatever else is necessary to read and write any registry hive file.	909	whatever else is necessary to read and write any registry hive file.
722		910
723	I am also not happy with device descriptors being strings rather than a	911	I am also not happy with device descriptors being strings rather than a
724	data structure, but strings are probably better for command line usage. In	912	data structure, but strings are probably better for command line usage. In
725	any case,. device descriptors could be converted by simply "splitting" at	913	any case, device descriptors could be converted by simply "splitting" at
726	"=" and "," into an array reference, recursively.	914	"=" and "," into an array reference, recursively.
727		915
728	=head1 HOMEPAGE	916	=head1 HOMEPAGE
729		917
730	Original versions of this program can be found at	918	Original versions of this program can be found at
…		…
737	free to change and redistribute it. There is NO WARRANTY, to the extent	925	free to change and redistribute it. There is NO WARRANTY, to the extent
738	permitted by law.	926	permitted by law.
739		927
740	=cut	928	=cut
741		929
742	BEGIN { require "common/sense.pm"; common::sense->import } # common sense is optional, but recommended	930	# common sense is optional, but recommended
		931	BEGIN { eval { require "common/sense.pm"; } && common::sense->import }
743		932
744	use Data::Dump;	933	no warnings 'portable'; # avoid 32 bit integer warnings
		934
745	use Encode ();	935	use Encode ();
746	use List::Util ();	936	use List::Util ();
747	use IO::Handle ();	937	use IO::Handle ();
748	use Time::HiRes ();	938	use Time::HiRes ();
749		939
…		…
760	sub xxd($$) {	950	sub xxd($$) {
761	open my $xxd, "| xxd | sed -e 's/^/\Q$_[0]\E: /'";	951	open my $xxd, "| xxd | sed -e 's/^/\Q$_[0]\E: /'";
762	syswrite $xxd, $_[1];	952	syswrite $xxd, $_[1];
763	}	953	}
764		954
		955	# get some meta info on a file (uid, gid, perms)
		956	sub stat_get($) {
		957	[(stat shift)[4, 5, 2]]
		958	}
		959
		960	# set stat info on a file
		961	sub stat_set($$) {
		962	my ($fh_or_path, $stat) = @_;
		963
		964	return unless $stat;
		965	chown $stat->[0], $stat->[1], $fh_or_path;
		966	chmod +($stat->[2] & 07777), $fh_or_path;
		967	}
		968
		969	sub file_load($) {
		970	my ($path) = @_;
		971
		972	open my $fh, "<:raw", $path
		973	or die "$path: $!\n";
		974	my $size = -s $fh;
		975	$size = read $fh, my $buf, $size
		976	or die "$path: short read\n";
		977
		978	$buf
		979	}
		980
		981	sub file_save($$;$) {
		982	my ($path, $data, $stat) = @_;
		983
		984	open my $fh, ">:raw", "$path~"
		985	or die "$path~: $!\n";
		986	print $fh $data
		987	or die "$path~: short write\n";
		988	stat_set $fh, $stat;
		989	$fh->sync;
		990	close $fh;
		991
		992	rename "$path~", $path;
		993	}
		994
765	# sources and resources used for this:	995	# sources and resources used for writing pbcdedit
		996	#
766	# registry:	997	# registry:
767	# https://github.com/msuhanov/regf/blob/master/Windows%20registry%20file%20format%20specification.md	998	# https://github.com/msuhanov/regf/blob/master/Windows%20registry%20file%20format%20specification.md
768	# http://amnesia.gtisc.gatech.edu/~moyix/suzibandit.ltd.uk/MSc/	999	# http://amnesia.gtisc.gatech.edu/~moyix/suzibandit.ltd.uk/MSc/
769	# bcd:	1000	# bcd:
770	# http://www.geoffchappell.com/notes/windows/boot/bcd/index.htm	1001	# http://www.geoffchappell.com/notes/windows/boot/bcd/index.htm
…		…
952	my ($rname, $root) = $decode_key->($rootcell);	1183	my ($rname, $root) = $decode_key->($rootcell);
953		1184
954	[$rname, $root]	1185	[$rname, $root]
955	}	1186	}
956		1187
957	# return a binary windows fILETIME struct	1188	# return a binary windows FILETIME struct
958	sub filetime_now {	1189	sub filetime_now {
959	my ($s, $ms) = Time::HiRes::gettimeofday;	1190	my ($s, $ms) = Time::HiRes::gettimeofday;
960		1191
961	pack "Q<", $s = ($s * 1_000_000 + $ms) * 10 + 116_444_736_000_000_000	1192	pack "Q<", ($s * 1_000_000 + $ms) * 10
		1193	+ 116_444_736_000_000_000 # 1970-01-01 00:00:00
962	}	1194	}
963		1195
964	# encode a registry hive	1196	# encode a registry hive
965	sub regf_encode($) {	1197	sub regf_encode($) {
966	my ($hive) = @_;	1198	my ($hive) = @_;
…		…
969		1201
970	# the filetime is apparently used to verify log file validity,	1202	# the filetime is apparently used to verify log file validity,
971	# so by generating a new timestamp the log files *should* automatically	1203	# so by generating a new timestamp the log files *should* automatically
972	# become invalidated and windows would "self-heal" them.	1204	# become invalidated and windows would "self-heal" them.
973	# (update: has been verified by reverse engineering)	1205	# (update: has been verified by reverse engineering)
974	# possibly the fact that the two sequence numbes match might also	1206	# possibly the fact that the two sequence numbers match might also
975	# make windows think that the hive is not dirty and ignore logs.	1207	# make windows think that the hive is not dirty and ignore logs.
976	# (update: has been verified by reverse engineering)	1208	# (update: has been verified by reverse engineering)
977		1209
978	my $now = filetime_now;	1210	my $now = filetime_now;
979		1211
…		…
1118	}	1350	}
1119		1351
1120	# load and parse registry from file	1352	# load and parse registry from file
1121	sub regf_load($) {	1353	sub regf_load($) {
1122	my ($path) = @_;	1354	my ($path) = @_;
1123	open my $regf, "<:raw", $path
1124	or die "$path: $!\n";
1125	my $size = -s $regf;
1126	$size = read $regf, my $buf, $size
1127	or die "$path: short read\n";
1128		1355
1129	regf_decode $buf	1356	regf_decode file_load $path
1130	}	1357	}
1131		1358
1132	# encode and save registry to file	1359	# encode and save registry to file
1133	sub regf_save {	1360	sub regf_save($$;$) {
1134	my ($path, $hive) = @_;	1361	my ($path, $hive, $stat) = @_;
1135		1362
1136	$hive = regf_encode $hive;	1363	$hive = regf_encode $hive;
1137		1364
1138	open my $regf, ">:raw", "$path~"	1365	file_save $path, $hive, $stat;
1139	or die "$path~: $!\n";
1140	print $regf $hive
1141	or die "$path~: short write\n";
1142	$regf->sync;
1143	close $regf;
1144
1145	rename "$path~", $path;
1146	}	1366	}
1147		1367
1148	#############################################################################	1368	#############################################################################
1149	# bcd stuff	1369	# bcd stuff
1150		1370
1151	# human-readable alises for GUID object identifiers	1371	# human-readable aliases for GUID object identifiers
1152	our %bcd_objects = (	1372	our %bcd_objects = (
1153	'{0ce4991b-e6b3-4b16-b23c-5e0d9250e5d9}' => '{emssettings}',	1373	'{0ce4991b-e6b3-4b16-b23c-5e0d9250e5d9}' => '{emssettings}',
1154	'{1afa9c49-16ab-4a5c-4a90-212802da9460}' => '{resumeloadersettings}',	1374	'{1afa9c49-16ab-4a5c-4a90-212802da9460}' => '{resumeloadersettings}',
1155	'{1cae1eb7-a0df-4d4d-9851-4860e34ef535}' => '{default}',	1375	'{1cae1eb7-a0df-4d4d-9851-4860e34ef535}' => '{default}',
1156	'{313e8eed-7098-4586-a9bf-309c61f8d449}' => '{kerneldbgsettings}',	1376	'{313e8eed-7098-4586-a9bf-309c61f8d449}' => '{kerneldbgsettings}',
…		…
1263	sub BCDE_FORMAT_GUID_LIST () { 0x04000000 }	1483	sub BCDE_FORMAT_GUID_LIST () { 0x04000000 }
1264	sub BCDE_FORMAT_INTEGER () { 0x05000000 }	1484	sub BCDE_FORMAT_INTEGER () { 0x05000000 }
1265	sub BCDE_FORMAT_BOOLEAN () { 0x06000000 }	1485	sub BCDE_FORMAT_BOOLEAN () { 0x06000000 }
1266	sub BCDE_FORMAT_INTEGER_LIST () { 0x07000000 }	1486	sub BCDE_FORMAT_INTEGER_LIST () { 0x07000000 }
1267		1487
1268	sub dec_device;
1269	sub enc_device;
1270
1271	sub enc_integer($) {	1488	sub enc_integer($) {
1272	no warnings 'portable'; # ugh
1273	my $value = shift;	1489	my $value = shift;
1274	$value = oct $value if $value =~ /^0[bBxX]/;	1490	$value = oct $value if $value =~ /^0[bBxX]/;
1275	unpack "H*", pack "Q<", $value	1491	unpack "H*", pack "Q<", $value
1276	}	1492	}
		1493
		1494	sub enc_device($$);
		1495	sub dec_device($$);
1277		1496
1278	our %bcde_dec = (	1497	our %bcde_dec = (
1279	BCDE_FORMAT_DEVICE , \&dec_device,	1498	BCDE_FORMAT_DEVICE , \&dec_device,
1280	# # for round-trip verification	1499	# # for round-trip verification
1281	# BCDE_FORMAT_DEVICE , sub {	1500	# BCDE_FORMAT_DEVICE , sub {
…		…
1287	BCDE_FORMAT_STRING , sub { shift },	1506	BCDE_FORMAT_STRING , sub { shift },
1288	BCDE_FORMAT_GUID , sub { dec_wguid enc_wguid shift },	1507	BCDE_FORMAT_GUID , sub { dec_wguid enc_wguid shift },
1289	BCDE_FORMAT_GUID_LIST , sub { join " ", map dec_wguid enc_wguid $_, @{+shift} },	1508	BCDE_FORMAT_GUID_LIST , sub { join " ", map dec_wguid enc_wguid $_, @{+shift} },
1290	BCDE_FORMAT_INTEGER , sub { unpack "Q", pack "a8", pack "H*", shift }, # integer might be 4 or 8 bytes - caused by ms coding bugs	1509	BCDE_FORMAT_INTEGER , sub { unpack "Q", pack "a8", pack "H*", shift }, # integer might be 4 or 8 bytes - caused by ms coding bugs
1291	BCDE_FORMAT_BOOLEAN , sub { shift eq "00" ? 0 : 1 },	1510	BCDE_FORMAT_BOOLEAN , sub { shift eq "00" ? 0 : 1 },
1292	BCDE_FORMAT_INTEGER_LIST, sub { join " ", unpack "Q*", pack "H*", shift }, # not sure if this cna be 4 bytes	1511	BCDE_FORMAT_INTEGER_LIST, sub { join " ", unpack "Q*", pack "H*", shift }, # not sure if this can be 4 bytes
1293	);	1512	);
1294		1513
1295	our %bcde_enc = (	1514	our %bcde_enc = (
1296	BCDE_FORMAT_DEVICE , sub { binary => enc_device shift },	1515	BCDE_FORMAT_DEVICE , sub { binary => enc_device $_[0], $_[1] },
1297	BCDE_FORMAT_STRING , sub { sz => shift },	1516	BCDE_FORMAT_STRING , sub { sz => shift },
1298	BCDE_FORMAT_GUID , sub { sz => "{" . (dec_guid enc_wguid shift) . "}" },	1517	BCDE_FORMAT_GUID , sub { sz => "{" . (dec_guid enc_wguid shift) . "}" },
1299	BCDE_FORMAT_GUID_LIST , sub { multi_sz => [map "{" . (dec_guid enc_wguid $_) . "}", split /\s+/, shift ] },	1518	BCDE_FORMAT_GUID_LIST , sub { multi_sz => [map "{" . (dec_guid enc_wguid $_) . "}", split /\s+/, shift ] },
1300	BCDE_FORMAT_INTEGER , sub { binary => enc_integer shift },	1519	BCDE_FORMAT_INTEGER , sub { binary => enc_integer shift },
1301	BCDE_FORMAT_BOOLEAN , sub { binary => shift ? "01" : "00" },	1520	BCDE_FORMAT_BOOLEAN , sub { binary => shift ? "01" : "00" },
1302	BCDE_FORMAT_INTEGER_LIST, sub { binary => join "", map enc_integer $_, split /\s+/, shift },	1521	BCDE_FORMAT_INTEGER_LIST, sub { binary => join "", map enc_integer $_, split /\s+/, shift },
1303	);	1522	);
1304		1523
1305	# BCD Elements	1524	# BCD Elements
1306	our %bcde = (	1525	our %bcde_byclass = (
		1526	any => {
1307	0x11000001 => 'device',	1527	0x11000001 => 'device',
1308	0x12000002 => 'path',	1528	0x12000002 => 'path',
1309	0x12000004 => 'description',	1529	0x12000004 => 'description',
1310	0x12000005 => 'locale',	1530	0x12000005 => 'locale',
1311	0x14000006 => 'inherit',	1531	0x14000006 => 'inherit',
1312	0x15000007 => 'truncatememory',	1532	0x15000007 => 'truncatememory',
1313	0x14000008 => 'recoverysequence',	1533	0x14000008 => 'recoverysequence',
1314	0x16000009 => 'recoveryenabled',	1534	0x16000009 => 'recoveryenabled',
1315	0x1700000a => 'badmemorylist',	1535	0x1700000a => 'badmemorylist',
1316	0x1600000b => 'badmemoryaccess',	1536	0x1600000b => 'badmemoryaccess',
1317	0x1500000c => 'firstmegabytepolicy',	1537	0x1500000c => 'firstmegabytepolicy',
1318	0x1500000d => 'relocatephysical',	1538	0x1500000d => 'relocatephysical',
1319	0x1500000e => 'avoidlowmemory',	1539	0x1500000e => 'avoidlowmemory',
1320	0x1600000f => 'traditionalkseg',	1540	0x1600000f => 'traditionalkseg',
1321	0x16000010 => 'bootdebug',	1541	0x16000010 => 'bootdebug',
1322	0x15000011 => 'debugtype',	1542	0x15000011 => 'debugtype',
1323	0x15000012 => 'debugaddress',	1543	0x15000012 => 'debugaddress',
1324	0x15000013 => 'debugport',	1544	0x15000013 => 'debugport',
1325	0x15000014 => 'baudrate',	1545	0x15000014 => 'baudrate',
1326	0x15000015 => 'channel',	1546	0x15000015 => 'channel',
1327	0x12000016 => 'targetname',	1547	0x12000016 => 'targetname',
1328	0x16000017 => 'noumex',	1548	0x16000017 => 'noumex',
1329	0x15000018 => 'debugstart',	1549	0x15000018 => 'debugstart',
1330	0x12000019 => 'busparams',	1550	0x12000019 => 'busparams',
1331	0x1500001a => 'hostip',	1551	0x1500001a => 'hostip',
1332	0x1500001b => 'port',	1552	0x1500001b => 'port',
1333	0x1600001c => 'dhcp',	1553	0x1600001c => 'dhcp',
1334	0x1200001d => 'key',	1554	0x1200001d => 'key',
1335	0x1600001e => 'vm',	1555	0x1600001e => 'vm',
1336	0x16000020 => 'bootems',	1556	0x16000020 => 'bootems',
1337	0x15000022 => 'emsport',	1557	0x15000022 => 'emsport',
1338	0x15000023 => 'emsbaudrate',	1558	0x15000023 => 'emsbaudrate',
1339	0x12000030 => 'loadoptions',	1559	0x12000030 => 'loadoptions',
1340	0x16000040 => 'advancedoptions',	1560	0x16000040 => 'advancedoptions',
1341	0x16000041 => 'optionsedit',	1561	0x16000041 => 'optionsedit',
1342	0x15000042 => 'keyringaddress',	1562	0x15000042 => 'keyringaddress',
1343	0x11000043 => 'bootstatdevice',	1563	0x11000043 => 'bootstatdevice',
1344	0x12000044 => 'bootstatfilepath',	1564	0x12000044 => 'bootstatfilepath',
1345	0x16000045 => 'preservebootstat',	1565	0x16000045 => 'preservebootstat',
1346	0x16000046 => 'graphicsmodedisabled',	1566	0x16000046 => 'graphicsmodedisabled',
1347	0x15000047 => 'configaccesspolicy',	1567	0x15000047 => 'configaccesspolicy',
1348	0x16000048 => 'nointegritychecks',	1568	0x16000048 => 'nointegritychecks',
1349	0x16000049 => 'testsigning',	1569	0x16000049 => 'testsigning',
1350	0x1200004a => 'fontpath',	1570	0x1200004a => 'fontpath',
1351	0x1500004b => 'integrityservices',	1571	0x1500004b => 'integrityservices',
1352	0x1500004c => 'volumebandid',	1572	0x1500004c => 'volumebandid',
1353	0x16000050 => 'extendedinput',	1573	0x16000050 => 'extendedinput',
1354	0x15000051 => 'initialconsoleinput',	1574	0x15000051 => 'initialconsoleinput',
1355	0x15000052 => 'graphicsresolution',	1575	0x15000052 => 'graphicsresolution',
1356	0x16000053 => 'restartonfailure',	1576	0x16000053 => 'restartonfailure',
1357	0x16000054 => 'highestmode',	1577	0x16000054 => 'highestmode',
1358	0x16000060 => 'isolatedcontext',	1578	0x16000060 => 'isolatedcontext',
1359	0x15000065 => 'displaymessage',	1579	0x15000065 => 'displaymessage',
1360	0x15000066 => 'displaymessageoverride',	1580	0x15000066 => 'displaymessageoverride',
1361	0x16000068 => 'nobootuxtext',	1581	0x16000068 => 'nobootuxtext',
1362	0x16000069 => 'nobootuxprogress',	1582	0x16000069 => 'nobootuxprogress',
1363	0x1600006a => 'nobootuxfade',	1583	0x1600006a => 'nobootuxfade',
1364	0x1600006b => 'bootuxreservepooldebug',	1584	0x1600006b => 'bootuxreservepooldebug',
1365	0x1600006c => 'bootuxdisabled',	1585	0x1600006c => 'bootuxdisabled',
1366	0x1500006d => 'bootuxfadeframes',	1586	0x1500006d => 'bootuxfadeframes',
1367	0x1600006e => 'bootuxdumpstats',	1587	0x1600006e => 'bootuxdumpstats',
1368	0x1600006f => 'bootuxshowstats',	1588	0x1600006f => 'bootuxshowstats',
1369	0x16000071 => 'multibootsystem',	1589	0x16000071 => 'multibootsystem',
1370	0x16000072 => 'nokeyboard',	1590	0x16000072 => 'nokeyboard',
1371	0x15000073 => 'aliaswindowskey',	1591	0x15000073 => 'aliaswindowskey',
1372	0x16000074 => 'bootshutdowndisabled',	1592	0x16000074 => 'bootshutdowndisabled',
1373	0x15000075 => 'performancefrequency',	1593	0x15000075 => 'performancefrequency',
1374	0x15000076 => 'securebootrawpolicy',	1594	0x15000076 => 'securebootrawpolicy',
1375	0x17000077 => 'allowedinmemorysettings',	1595	0x17000077 => 'allowedinmemorysettings',
1376	0x15000079 => 'bootuxtransitiontime',	1596	0x15000079 => 'bootuxtransitiontime',
1377	0x1600007a => 'mobilegraphics',	1597	0x1600007a => 'mobilegraphics',
1378	0x1600007b => 'forcefipscrypto',	1598	0x1600007b => 'forcefipscrypto',
1379	0x1500007d => 'booterrorux',	1599	0x1500007d => 'booterrorux',
1380	0x1600007e => 'flightsigning',	1600	0x1600007e => 'flightsigning',
1381	0x1500007f => 'measuredbootlogformat',	1601	0x1500007f => 'measuredbootlogformat',
1382	0x15000080 => 'displayrotation',	1602	0x15000080 => 'displayrotation',
1383	0x15000081 => 'logcontrol',	1603	0x15000081 => 'logcontrol',
1384	0x16000082 => 'nofirmwaresync',	1604	0x16000082 => 'nofirmwaresync',
1385	0x11000084 => 'windowssyspart',	1605	0x11000084 => 'windowssyspart',
1386	0x16000087 => 'numlock',	1606	0x16000087 => 'numlock',
1387	0x22000001 => 'bpbstring',	1607	0x26000202 => 'skipffumode',
		1608	0x26000203 => 'forceffumode',
		1609	0x25000510 => 'chargethreshold',
		1610	0x26000512 => 'offmodecharging',
		1611	0x25000aaa => 'bootflow',
		1612	0x45000001 => 'devicetype',
		1613	0x42000002 => 'applicationrelativepath',
		1614	0x42000003 => 'ramdiskdevicerelativepath',
		1615	0x46000004 => 'omitosloaderelements',
		1616	0x47000006 => 'elementstomigrate',
		1617	0x46000010 => 'recoveryos',
		1618	},
		1619	bootapp => {
		1620	0x26000145 => 'enablebootdebugpolicy',
		1621	0x26000146 => 'enablebootorderclean',
		1622	0x26000147 => 'enabledeviceid',
		1623	0x26000148 => 'enableffuloader',
		1624	0x26000149 => 'enableiuloader',
		1625	0x2600014a => 'enablemassstorage',
		1626	0x2600014b => 'enablerpmbprovisioning',
		1627	0x2600014c => 'enablesecurebootpolicy',
		1628	0x2600014d => 'enablestartcharge',
		1629	0x2600014e => 'enableresettpm',
		1630	},
		1631	bootmgr => {
1388	0x24000001 => 'displayorder',	1632	0x24000001 => 'displayorder',
1389	0x21000001 => 'filedevice',
1390	0x21000001 => 'osdevice',
1391	0x25000001 => 'passcount',
1392	0x26000001 => 'pxesoftreboot',
1393	0x22000002 => 'applicationname',
1394	0x24000002 => 'bootsequence',	1633	0x24000002 => 'bootsequence',
1395	0x22000002 => 'filepath',
1396	0x22000002 => 'systemroot',
1397	0x25000002 => 'testmix',
1398	0x26000003 => 'cacheenable',
1399	0x26000003 => 'customsettings',
1400	0x23000003 => 'default',	1634	0x23000003 => 'default',
1401	0x25000003 => 'failurecount',
1402	0x23000003 => 'resumeobject',
1403	0x26000004 => 'failuresenabled',
1404	0x26000004 => 'pae',
1405	0x26000004 => 'stampdisks',
1406	0x25000004 => 'testtofail',
1407	0x25000004 => 'timeout',	1635	0x25000004 => 'timeout',
1408	0x21000005 => 'associatedosdevice',
1409	0x26000005 => 'cacheenable',
1410	0x26000005 => 'resume',	1636	0x26000005 => 'resume',
1411	0x25000005 => 'stridefailcount',
1412	0x26000006 => 'debugoptionenabled',
1413	0x25000006 => 'invcfailcount',
1414	0x23000006 => 'resumeobject',	1637	0x23000006 => 'resumeobject',
1415	0x25000007 => 'bootux',
1416	0x25000007 => 'matsfailcount',
1417	0x24000007 => 'startupsequence',	1638	0x24000007 => 'startupsequence',
1418	0x25000008 => 'bootmenupolicy',
1419	0x25000008 => 'randfailcount',
1420	0x25000009 => 'chckrfailcount',
1421	0x26000010 => 'detecthal',
1422	0x24000010 => 'toolsdisplayorder',	1639	0x24000010 => 'toolsdisplayorder',
1423	0x22000011 => 'kernel',
1424	0x22000012 => 'hal',
1425	0x22000013 => 'dbgtransport',
1426	0x26000020 => 'displaybootmenu',	1640	0x26000020 => 'displaybootmenu',
1427	0x25000020 => 'nx',
1428	0x26000021 => 'noerrordisplay',	1641	0x26000021 => 'noerrordisplay',
1429	0x25000021 => 'pae',
1430	0x21000022 => 'bcddevice',	1642	0x21000022 => 'bcddevice',
1431	0x26000022 => 'winpe',
1432	0x22000023 => 'bcdfilepath',	1643	0x22000023 => 'bcdfilepath',
1433	0x26000024 => 'hormenabled',	1644	0x26000024 => 'hormenabled',
1434	0x26000024 => 'hormenabled',
1435	0x26000024 => 'nocrashautoreboot',
1436	0x26000025 => 'hiberboot',	1645	0x26000025 => 'hiberboot',
1437	0x26000025 => 'lastknowngood',
1438	0x26000026 => 'oslnointegritychecks',
1439	0x22000026 => 'passwordoverride',	1646	0x22000026 => 'passwordoverride',
1440	0x26000027 => 'osltestsigning',
1441	0x22000027 => 'pinpassphraseoverride',	1647	0x22000027 => 'pinpassphraseoverride',
1442	0x26000028 => 'processcustomactionsfirst',	1648	0x26000028 => 'processcustomactionsfirst',
1443	0x27000030 => 'customactions',	1649	0x27000030 => 'customactions',
1444	0x26000030 => 'nolowmem',
1445	0x26000031 => 'persistbootsequence',	1650	0x26000031 => 'persistbootsequence',
1446	0x25000031 => 'removememory',
1447	0x25000032 => 'increaseuserva',
1448	0x26000032 => 'skipstartupsequence',	1651	0x26000032 => 'skipstartupsequence',
1449	0x25000033 => 'perfmem',
1450	0x22000040 => 'fverecoveryurl',	1652	0x22000040 => 'fverecoveryurl',
1451	0x26000040 => 'vga',
1452	0x22000041 => 'fverecoverymessage',	1653	0x22000041 => 'fverecoverymessage',
		1654	},
		1655	device => {
		1656	0x35000001 => 'ramdiskimageoffset',
		1657	0x35000002 => 'ramdisktftpclientport',
		1658	0x31000003 => 'ramdisksdidevice',
		1659	0x32000004 => 'ramdisksdipath',
		1660	0x35000005 => 'ramdiskimagelength',
		1661	0x36000006 => 'exportascd',
		1662	0x35000007 => 'ramdisktftpblocksize',
		1663	0x35000008 => 'ramdisktftpwindowsize',
		1664	0x36000009 => 'ramdiskmcenabled',
		1665	0x3600000a => 'ramdiskmctftpfallback',
		1666	0x3600000b => 'ramdisktftpvarwindow',
		1667	},
		1668	memdiag => {
		1669	0x25000001 => 'passcount',
		1670	0x25000002 => 'testmix',
		1671	0x25000003 => 'failurecount',
		1672	0x26000003 => 'cacheenable',
		1673	0x25000004 => 'testtofail',
		1674	0x26000004 => 'failuresenabled',
		1675	0x25000005 => 'stridefailcount',
		1676	0x26000005 => 'cacheenable',
		1677	0x25000006 => 'invcfailcount',
		1678	0x25000007 => 'matsfailcount',
		1679	0x25000008 => 'randfailcount',
		1680	0x25000009 => 'chckrfailcount',
		1681	},
		1682	ntldr => {
		1683	0x22000001 => 'bpbstring',
		1684	},
		1685	osloader => {
		1686	0x21000001 => 'osdevice',
		1687	0x22000002 => 'systemroot',
		1688	0x23000003 => 'resumeobject',
		1689	0x26000004 => 'stampdisks',
		1690	0x26000010 => 'detecthal',
		1691	0x22000011 => 'kernel',
		1692	0x22000012 => 'hal',
		1693	0x22000013 => 'dbgtransport',
		1694	0x25000020 => 'nx',
		1695	0x25000021 => 'pae',
		1696	0x26000022 => 'winpe',
		1697	0x26000024 => 'nocrashautoreboot',
		1698	0x26000025 => 'lastknowngood',
		1699	0x26000026 => 'oslnointegritychecks',
		1700	0x26000027 => 'osltestsigning',
		1701	0x26000030 => 'nolowmem',
		1702	0x25000031 => 'removememory',
		1703	0x25000032 => 'increaseuserva',
		1704	0x25000033 => 'perfmem',
		1705	0x26000040 => 'vga',
1453	0x26000041 => 'quietboot',	1706	0x26000041 => 'quietboot',
1454	0x26000042 => 'novesa',	1707	0x26000042 => 'novesa',
1455	0x26000043 => 'novga',	1708	0x26000043 => 'novga',
1456	0x25000050 => 'clustermodeaddressing',	1709	0x25000050 => 'clustermodeaddressing',
1457	0x26000051 => 'usephysicaldestination',	1710	0x26000051 => 'usephysicaldestination',
1458	0x25000052 => 'restrictapiccluster',	1711	0x25000052 => 'restrictapiccluster',
1459	0x22000053 => 'evstore',	1712	0x22000053 => 'evstore',
1460	0x26000054 => 'uselegacyapicmode',	1713	0x26000054 => 'uselegacyapicmode',
1461	0x26000060 => 'onecpu',	1714	0x26000060 => 'onecpu',
1462	0x25000061 => 'numproc',	1715	0x25000061 => 'numproc',
1463	0x26000062 => 'maxproc',	1716	0x26000062 => 'maxproc',
1464	0x25000063 => 'configflags',	1717	0x25000063 => 'configflags',
1465	0x26000064 => 'maxgroup',	1718	0x26000064 => 'maxgroup',
1466	0x26000065 => 'groupaware',	1719	0x26000065 => 'groupaware',
1467	0x25000066 => 'groupsize',	1720	0x25000066 => 'groupsize',
1468	0x26000070 => 'usefirmwarepcisettings',	1721	0x26000070 => 'usefirmwarepcisettings',
1469	0x25000071 => 'msi',	1722	0x25000071 => 'msi',
1470	0x25000072 => 'pciexpress',	1723	0x25000072 => 'pciexpress',
1471	0x25000080 => 'safeboot',	1724	0x25000080 => 'safeboot',
1472	0x26000081 => 'safebootalternateshell',	1725	0x26000081 => 'safebootalternateshell',
1473	0x26000090 => 'bootlog',	1726	0x26000090 => 'bootlog',
1474	0x26000091 => 'sos',	1727	0x26000091 => 'sos',
1475	0x260000a0 => 'debug',	1728	0x260000a0 => 'debug',
1476	0x260000a1 => 'halbreakpoint',	1729	0x260000a1 => 'halbreakpoint',
1477	0x260000a2 => 'useplatformclock',	1730	0x260000a2 => 'useplatformclock',
1478	0x260000a3 => 'forcelegacyplatform',	1731	0x260000a3 => 'forcelegacyplatform',
1479	0x260000a4 => 'useplatformtick',	1732	0x260000a4 => 'useplatformtick',
1480	0x260000a5 => 'disabledynamictick',	1733	0x260000a5 => 'disabledynamictick',
1481	0x250000a6 => 'tscsyncpolicy',	1734	0x250000a6 => 'tscsyncpolicy',
1482	0x260000b0 => 'ems',	1735	0x260000b0 => 'ems',
1483	0x250000c0 => 'forcefailure',	1736	0x250000c0 => 'forcefailure',
1484	0x250000c1 => 'driverloadfailurepolicy',	1737	0x250000c1 => 'driverloadfailurepolicy',
1485	0x250000c2 => 'bootmenupolicy',	1738	0x250000c2 => 'bootmenupolicy',
1486	0x260000c3 => 'onetimeadvancedoptions',	1739	0x260000c3 => 'onetimeadvancedoptions',
1487	0x260000c4 => 'onetimeoptionsedit',	1740	0x260000c4 => 'onetimeoptionsedit',
1488	0x250000e0 => 'bootstatuspolicy',	1741	0x250000e0 => 'bootstatuspolicy',
1489	0x260000e1 => 'disableelamdrivers',	1742	0x260000e1 => 'disableelamdrivers',
1490	0x250000f0 => 'hypervisorlaunchtype',	1743	0x250000f0 => 'hypervisorlaunchtype',
1491	0x220000f1 => 'hypervisorpath',	1744	0x220000f1 => 'hypervisorpath',
1492	0x260000f2 => 'hypervisordebug',	1745	0x260000f2 => 'hypervisordebug',
1493	0x250000f3 => 'hypervisordebugtype',	1746	0x250000f3 => 'hypervisordebugtype',
1494	0x250000f4 => 'hypervisordebugport',	1747	0x250000f4 => 'hypervisordebugport',
1495	0x250000f5 => 'hypervisorbaudrate',	1748	0x250000f5 => 'hypervisorbaudrate',
1496	0x250000f6 => 'hypervisorchannel',	1749	0x250000f6 => 'hypervisorchannel',
1497	0x250000f7 => 'bootux',	1750	0x250000f7 => 'bootux',
1498	0x260000f8 => 'hypervisordisableslat',	1751	0x260000f8 => 'hypervisordisableslat',
1499	0x220000f9 => 'hypervisorbusparams',	1752	0x220000f9 => 'hypervisorbusparams',
1500	0x250000fa => 'hypervisornumproc',	1753	0x250000fa => 'hypervisornumproc',
1501	0x250000fb => 'hypervisorrootprocpernode',	1754	0x250000fb => 'hypervisorrootprocpernode',
1502	0x260000fc => 'hypervisoruselargevtlb',	1755	0x260000fc => 'hypervisoruselargevtlb',
1503	0x250000fd => 'hypervisorhostip',	1756	0x250000fd => 'hypervisorhostip',
1504	0x250000fe => 'hypervisorhostport',	1757	0x250000fe => 'hypervisorhostport',
1505	0x250000ff => 'hypervisordebugpages',	1758	0x250000ff => 'hypervisordebugpages',
1506	0x25000100 => 'tpmbootentropy',	1759	0x25000100 => 'tpmbootentropy',
1507	0x22000110 => 'hypervisorusekey',	1760	0x22000110 => 'hypervisorusekey',
1508	0x22000112 => 'hypervisorproductskutype',	1761	0x22000112 => 'hypervisorproductskutype',
1509	0x25000113 => 'hypervisorrootproc',	1762	0x25000113 => 'hypervisorrootproc',
1510	0x26000114 => 'hypervisordhcp',	1763	0x26000114 => 'hypervisordhcp',
1511	0x25000115 => 'hypervisoriommupolicy',	1764	0x25000115 => 'hypervisoriommupolicy',
1512	0x26000116 => 'hypervisorusevapic',	1765	0x26000116 => 'hypervisorusevapic',
1513	0x22000117 => 'hypervisorloadoptions',	1766	0x22000117 => 'hypervisorloadoptions',
1514	0x25000118 => 'hypervisormsrfilterpolicy',	1767	0x25000118 => 'hypervisormsrfilterpolicy',
1515	0x25000119 => 'hypervisormmionxpolicy',	1768	0x25000119 => 'hypervisormmionxpolicy',
1516	0x2500011a => 'hypervisorschedulertype',	1769	0x2500011a => 'hypervisorschedulertype',
1517	0x25000120 => 'xsavepolicy',	1770	0x25000120 => 'xsavepolicy',
1518	0x25000121 => 'xsaveaddfeature0',	1771	0x25000121 => 'xsaveaddfeature0',
1519	0x25000122 => 'xsaveaddfeature1',	1772	0x25000122 => 'xsaveaddfeature1',
1520	0x25000123 => 'xsaveaddfeature2',	1773	0x25000123 => 'xsaveaddfeature2',
1521	0x25000124 => 'xsaveaddfeature3',	1774	0x25000124 => 'xsaveaddfeature3',
1522	0x25000125 => 'xsaveaddfeature4',	1775	0x25000125 => 'xsaveaddfeature4',
1523	0x25000126 => 'xsaveaddfeature5',	1776	0x25000126 => 'xsaveaddfeature5',
1524	0x25000127 => 'xsaveaddfeature6',	1777	0x25000127 => 'xsaveaddfeature6',
1525	0x25000128 => 'xsaveaddfeature7',	1778	0x25000128 => 'xsaveaddfeature7',
1526	0x25000129 => 'xsaveremovefeature',	1779	0x25000129 => 'xsaveremovefeature',
1527	0x2500012a => 'xsaveprocessorsmask',	1780	0x2500012a => 'xsaveprocessorsmask',
1528	0x2500012b => 'xsavedisable',	1781	0x2500012b => 'xsavedisable',
1529	0x2500012c => 'kerneldebugtype',	1782	0x2500012c => 'kerneldebugtype',
1530	0x2200012d => 'kernelbusparams',	1783	0x2200012d => 'kernelbusparams',
1531	0x2500012e => 'kerneldebugaddress',	1784	0x2500012e => 'kerneldebugaddress',
1532	0x2500012f => 'kerneldebugport',	1785	0x2500012f => 'kerneldebugport',
1533	0x25000130 => 'claimedtpmcounter',	1786	0x25000130 => 'claimedtpmcounter',
1534	0x25000131 => 'kernelchannel',	1787	0x25000131 => 'kernelchannel',
1535	0x22000132 => 'kerneltargetname',	1788	0x22000132 => 'kerneltargetname',
1536	0x25000133 => 'kernelhostip',	1789	0x25000133 => 'kernelhostip',
1537	0x25000134 => 'kernelport',	1790	0x25000134 => 'kernelport',
1538	0x26000135 => 'kerneldhcp',	1791	0x26000135 => 'kerneldhcp',
1539	0x22000136 => 'kernelkey',	1792	0x22000136 => 'kernelkey',
1540	0x22000137 => 'imchivename',	1793	0x22000137 => 'imchivename',
1541	0x21000138 => 'imcdevice',	1794	0x21000138 => 'imcdevice',
1542	0x25000139 => 'kernelbaudrate',	1795	0x25000139 => 'kernelbaudrate',
1543	0x22000140 => 'mfgmode',	1796	0x22000140 => 'mfgmode',
1544	0x26000141 => 'event',	1797	0x26000141 => 'event',
1545	0x25000142 => 'vsmlaunchtype',	1798	0x25000142 => 'vsmlaunchtype',
1546	0x25000144 => 'hypervisorenforcedcodeintegrity',	1799	0x25000144 => 'hypervisorenforcedcodeintegrity',
1547	0x26000145 => 'enablebootdebugpolicy',
1548	0x26000146 => 'enablebootorderclean',
1549	0x26000147 => 'enabledeviceid',
1550	0x26000148 => 'enableffuloader',
1551	0x26000149 => 'enableiuloader',
1552	0x2600014a => 'enablemassstorage',
1553	0x2600014b => 'enablerpmbprovisioning',
1554	0x2600014c => 'enablesecurebootpolicy',
1555	0x2600014d => 'enablestartcharge',
1556	0x2600014e => 'enableresettpm',
1557	0x21000150 => 'systemdatadevice',	1800	0x21000150 => 'systemdatadevice',
1558	0x21000151 => 'osarcdevice',	1801	0x21000151 => 'osarcdevice',
1559	0x21000153 => 'osdatadevice',	1802	0x21000153 => 'osdatadevice',
1560	0x21000154 => 'bspdevice',	1803	0x21000154 => 'bspdevice',
1561	0x21000155 => 'bspfilepath',	1804	0x21000155 => 'bspfilepath',
1562	0x26000202 => 'skipffumode',	1805	},
1563	0x26000203 => 'forceffumode',	1806	resume => {
1564	0x25000510 => 'chargethreshold',
1565	0x26000512 => 'offmodecharging',
1566	0x25000aaa => 'bootflow',
1567	0x35000001 => 'ramdiskimageoffset',
1568	0x35000002 => 'ramdisktftpclientport',
1569	0x31000003 => 'ramdisksdidevice',
1570	0x32000004 => 'ramdisksdipath',
1571	0x35000005 => 'ramdiskimagelength',
1572	0x36000006 => 'exportascd',
1573	0x35000007 => 'ramdisktftpblocksize',
1574	0x35000008 => 'ramdisktftpwindowsize',
1575	0x36000009 => 'ramdiskmcenabled',
1576	0x3600000a => 'ramdiskmctftpfallback',
1577	0x3600000b => 'ramdisktftpvarwindow',
1578	0x45000001 => 'devicetype',	1807	0x21000001 => 'filedevice',
		1808	0x22000002 => 'filepath',
		1809	0x26000003 => 'customsettings',
		1810	0x26000004 => 'pae',
		1811	0x21000005 => 'associatedosdevice',
		1812	0x26000006 => 'debugoptionenabled',
		1813	0x25000007 => 'bootux',
		1814	0x25000008 => 'bootmenupolicy',
		1815	0x26000024 => 'hormenabled',
		1816	},
		1817	startup => {
		1818	0x26000001 => 'pxesoftreboot',
1579	0x42000002 => 'applicationrelativepath',	1819	0x22000002 => 'applicationname',
1580	0x42000003 => 'ramdiskdevicerelativepath',	1820	},
1581	0x46000004 => 'omitosloaderelements',
1582	0x47000006 => 'elementstomigrate',
1583	0x46000010 => 'recoveryos',
1584	);	1821	);
1585		1822
1586	our %rbcde = reverse %bcde;	1823	# mask, value => class
		1824	our @bcde_typeclass = (
		1825	[0x00000000, 0x00000000, 'any'],
		1826	[0xf00fffff, 0x1000000a, 'bootapp'],
		1827	[0xf0ffffff, 0x2020000a, 'bootapp'],
		1828	[0xf00fffff, 0x10000001, 'bootmgr'],
		1829	[0xf00fffff, 0x10000002, 'bootmgr'],
		1830	[0xf0ffffff, 0x20200001, 'bootmgr'],
		1831	[0xf0ffffff, 0x20200002, 'bootmgr'],
		1832	[0xf0f00000, 0x20300000, 'device'],
		1833	[0xf0000000, 0x30000000, 'device'],
		1834	[0xf00fffff, 0x10000005, 'memdiag'],
		1835	[0xf0ffffff, 0x20200005, 'memdiag'],
		1836	[0xf00fffff, 0x10000006, 'ntldr'],
		1837	[0xf00fffff, 0x10000007, 'ntldr'],
		1838	[0xf0ffffff, 0x20200006, 'ntldr'],
		1839	[0xf0ffffff, 0x20200007, 'ntldr'],
		1840	[0xf00fffff, 0x10000003, 'osloader'],
		1841	[0xf0ffffff, 0x20200003, 'osloader'],
		1842	[0xf00fffff, 0x10000004, 'resume'],
		1843	[0xf0ffffff, 0x20200004, 'resume'],
		1844	[0xf00fffff, 0x10000009, 'startup'],
		1845	[0xf0ffffff, 0x20200009, 'startup'],
		1846	);
1587		1847
		1848	our %rbcde_byclass;
		1849
		1850	while (my ($k, $v) = each %bcde_byclass) {
		1851	$rbcde_byclass{$k} = { reverse %$v };
		1852	}
		1853
		1854	# decodes (numerical elem, type) to name
1588	sub dec_bcde_id($) {	1855	sub dec_bcde_id($$) {
		1856	for my $class (@bcde_typeclass) {
		1857	if (($_[1] & $class->[0]) == $class->[1]) {
		1858	if (my $id = $bcde_byclass{$class->[2]}{$_[0]}) {
		1859	return $id;
		1860	}
		1861	}
		1862	}
		1863
1589	$bcde{$_[0]} // sprintf "custom:%08x", $_[0]	1864	sprintf "custom:%08x", $_[0]
1590	}	1865	}
1591		1866
		1867	# encodes (elem as name, type)
1592	sub enc_bcde_id($) {	1868	sub enc_bcde_id($$) {
1593	$_[0] =~ /^custom:([0-9a-fA-F]{8}$)/	1869	$_[0] =~ /^custom:(?:0x)?([0-9a-fA-F]{8}$)/
1594	? hex $1	1870	and return hex $1;
1595	: $rbcde{$_[0]}	1871
		1872	for my $class (@bcde_typeclass) {
		1873	if (($_[1] & $class->[0]) == $class->[1]) {
		1874	if (my $value = $rbcde_byclass{$class->[2]}{$_[0]}) {
		1875	return $value;
		1876	}
		1877	}
		1878	}
		1879
		1880	undef
1596	}	1881	}
1597		1882
1598	# decode/encode bcd device element - the horror, no documentaion	1883	# decode/encode bcd device element - the horror, no documentaion
1599	# whatsoever, supercomplex, superinconsistent.	1884	# whatsoever, supercomplex, superinconsistent.
1600		1885
…		…
1603	our @part_type = qw(gpt mbr raw);	1888	our @part_type = qw(gpt mbr raw);
1604		1889
1605	our $NULL_DEVICE = "\x00" x 16;	1890	our $NULL_DEVICE = "\x00" x 16;
1606		1891
1607	# biggest bitch to decode, ever	1892	# biggest bitch to decode, ever
1608	# this decoded a device portion after the GUID	1893	# this decodes a device portion after the GUID
1609	sub dec_device_($);	1894	sub dec_device_($$);
1610	sub dec_device_($) {	1895	sub dec_device_($$) {
1611	my ($device) = @_;	1896	my ($device, $type) = @_;
1612		1897
1613	my $res;	1898	my $res;
1614		1899
1615	my ($type, $flags, $length, $pad) = unpack "VVVV", substr $device, 0, 4 * 4, "";	1900	my ($type, $flags, $length, $pad) = unpack "VVVV", substr $device, 0, 4 * 4, "";
1616		1901
…		…
1661		1946
1662	my $partid = $parttype eq "gpt" ? dec_guid $partdata	1947	my $partid = $parttype eq "gpt" ? dec_guid $partdata
1663	: $type eq "partition" ? unpack "Q<", $partdata # byte offset to partition start	1948	: $type eq "partition" ? unpack "Q<", $partdata # byte offset to partition start
1664	: unpack "L<", $partdata; # partition number, one-based	1949	: unpack "L<", $partdata; # partition number, one-based
1665		1950
1666	(my $parent, $device) = dec_device_ $device;	1951	(my $parent, $device) = dec_device_ $device, $type;
1667		1952
1668	$res .= "=";	1953	$res .= "=";
1669	$res .= "<$parent>";	1954	$res .= "<$parent>";
1670	$res .= ",$blocktype,$parttype,$diskid,$partid";	1955	$res .= ",$blocktype,$parttype,$diskid,$partid";
1671		1956
…		…
1691	or die "unsupported file descriptor version '$fver'\n";	1976	or die "unsupported file descriptor version '$fver'\n";
1692		1977
1693	$ftype == 5	1978	$ftype == 5
1694	or die "unsupported file descriptor path type '$type'\n";	1979	or die "unsupported file descriptor path type '$type'\n";
1695		1980
1696	(my $parent, $path) = dec_device_ $path;	1981	(my $parent, $path) = dec_device_ $path, $type;
1697		1982
1698	$path = $dec_path->($path, "file device without path");	1983	$path = $dec_path->($path, "file device without path");
1699		1984
1700	($parent, $path)	1985	($parent, $path)
1701	};	1986	};
…		…
1707		1992
1708	} elsif ($blocktype eq "vhd") {	1993	} elsif ($blocktype eq "vhd") {
1709	$device =~ s/^\x00{20}//s	1994	$device =~ s/^\x00{20}//s
1710	or die "virtualdisk has non-zero fields I don't understand\n";	1995	or die "virtualdisk has non-zero fields I don't understand\n";
1711		1996
1712	(my $parent, $device) = dec_device_ $device;	1997	(my $parent, $device) = dec_device_ $device, $type;
1713		1998
1714	$res .= "=vhd,<$parent>";	1999	$res .= "=vhd,<$parent>";
1715		2000
1716	} elsif ($blocktype eq "ramdisk") {	2001	} elsif ($blocktype eq "ramdisk") {
1717	my ($base, $size, $offset) = unpack "Q< Q< L<", substr $device, 0, 8 + 8 + 4, "";	2002	my ($base, $size, $offset) = unpack "Q< Q< L<", substr $device, 0, 8 + 8 + 4, "";
…		…
1730	my ($mode, $elem, $parent) = unpack "VVV", substr $device, 0, 4 * 3, "";	2015	my ($mode, $elem, $parent) = unpack "VVV", substr $device, 0, 4 * 3, "";
1731		2016
1732	if ($parent) {	2017	if ($parent) {
1733	# not sure why this is an offset - it must come after the path	2018	# not sure why this is an offset - it must come after the path
1734	$parent = substr $device, $parent - 4 * 3 - 4 * 4, 1e9, "";	2019	$parent = substr $device, $parent - 4 * 3 - 4 * 4, 1e9, "";
1735	($parent, my $tail) = dec_device_ $parent;	2020	($parent, my $tail) = dec_device_ $parent, $type;
1736	0 == length $tail	2021	0 == length $tail
1737	or die "trailing data after locate device parent\n";	2022	or die "trailing data after locate device parent\n";
1738	} else {	2023	} else {
1739	$parent = "null";	2024	$parent = "null";
1740	}	2025	}
…		…
1746		2031
1747	if ($mode == 0) { # "Element"	2032	if ($mode == 0) { # "Element"
1748	!length $path	2033	!length $path
1749	or die "device locate mode 0 having non-empty path ($mode, $elem, $path)\n";	2034	or die "device locate mode 0 having non-empty path ($mode, $elem, $path)\n";
1750		2035
1751	$elem = dec_bcde_id $elem;	2036	$elem = dec_bcde_id $elem, $type;
1752	$res .= "element,$elem";	2037	$res .= "element,$elem";
1753		2038
1754	} elsif ($mode == 1) { # "String"	2039	} elsif ($mode == 1) { # "String"
1755	!$elem	2040	!$elem
1756	or die "device locate mode 1 having non-zero element\n";	2041	or die "device locate mode 1 having non-zero element\n";
…		…
1781		2066
1782	($res, $tail)	2067	($res, $tail)
1783	}	2068	}
1784		2069
1785	# decode a full binary BCD device descriptor	2070	# decode a full binary BCD device descriptor
1786	sub dec_device($) {	2071	sub dec_device($$) {
1787	my ($device) = @_;	2072	my ($device, $type) = @_;
1788		2073
1789	$device = pack "H*", $device;	2074	$device = pack "H*", $device;
1790		2075
1791	my $guid = dec_guid substr $device, 0, 16, "";	2076	my $guid = dec_guid substr $device, 0, 16, "";
1792	$guid = $guid eq "00000000-0000-0000-0000-000000000000"	2077	$guid = $guid eq "00000000-0000-0000-0000-000000000000"
1793	? "" : "{$guid}";	2078	? "" : "{$guid}";
1794		2079
1795	eval {	2080	eval {
1796	my ($dev, $tail) = dec_device_ $device;	2081	my ($dev, $tail) = dec_device_ $device, $type;
1797		2082
1798	$tail eq ""	2083	$tail eq ""
1799	or die "unsupported trailing data after device descriptor\n";	2084	or die "unsupported trailing data after device descriptor\n";
1800		2085
1801	"$guid$dev"	2086	"$guid$dev"
…		…
1813		2098
1814	undef	2099	undef
1815	}	2100	}
1816		2101
1817	# encode the device portion after the GUID	2102	# encode the device portion after the GUID
1818	sub enc_device_;	2103	sub enc_device_($$);
1819	sub enc_device_ {	2104	sub enc_device_($$) {
1820	my ($device) = @_;	2105	my ($device, $type) = @_;
1821		2106
1822	my $enc_path = sub {	2107	my $enc_path = sub {
1823	my $path = shift;	2108	my $path = shift;
1824	$path =~ s/\//\\/g;	2109	$path =~ s/\//\\/g;
1825	(Encode::encode "UTF-16LE", $path) . "\x00\x00"	2110	(Encode::encode "UTF-16LE", $path) . "\x00\x00"
…		…
1843		2128
1844	my $parse_parent = sub {	2129	my $parse_parent = sub {
1845	my $parent;	2130	my $parent;
1846		2131
1847	if (s/^<//) {	2132	if (s/^<//) {
1848	($parent, $_) = enc_device_ $_;	2133	($parent, $_) = enc_device_ $_, $type;
1849	s/^>//	2134	s/^>//
1850	or die "$device: syntax error: parent device not followed by '>'\n";	2135	or die "$device: syntax error: parent device not followed by '>'\n";
1851	} else {	2136	} else {
1852	$parent = $NULL_DEVICE;	2137	$parent = $NULL_DEVICE;
1853	}	2138	}
…		…
1941		2226
1942	s/^,//	2227	s/^,//
1943	or die "$_: missing comma after locate parent device\n";	2228	or die "$_: missing comma after locate parent device\n";
1944		2229
1945	if (s/^element,//) {	2230	if (s/^element,//) {
1946	s/^([0-9a-z]+)//i	2231	s/^([0-9a-z:]+)//i
1947	or die "$_ locate element must be either name or 8-digit hex id\n";	2232	or die "$_ locate element must be either name or 8-digit hex id\n";
1948	$elem = enc_bcde_id $1;	2233	$elem = enc_bcde_id $1, $type;
1949	$mode = 0;	2234	$mode = 0;
1950	$path = $enc_path->("");	2235	$path = $enc_path->("");
1951		2236
1952	} elsif (s/^path,//) {	2237	} elsif (s/^path,//) {
1953	$mode = 1;	2238	$mode = 1;
…		…
2020	or die "$_: malformed or missing vmbus interface instance guid\n";	2305	or die "$_: malformed or missing vmbus interface instance guid\n";
2021	my $instance = enc_guid $1;	2306	my $instance = enc_guid $1;
2022		2307
2023	$payload = pack "a16a16x24", $type, $instance;	2308	$payload = pack "a16a16x24", $type, $instance;
2024		2309
		2310	# } elsif ($type eq "udp") {
		2311	# $payload = pack "Va16", 1, "12345678";
		2312
2025	} else {	2313	} else {
2026	die "$type: not a supported device type (binary, null, boot, legacypartition, partition, block, locate)\n";	2314	die "$type: not a supported device type (binary, null, boot, legacypartition, partition, block, locate)\n";
2027	}	2315	}
2028		2316
2029	return (	2317	return (
…		…
2032	);	2320	);
2033	}	2321	}
2034	}	2322	}
2035		2323
2036	# encode a full binary BCD device descriptor	2324	# encode a full binary BCD device descriptor
2037	sub enc_device {	2325	sub enc_device($$) {
2038	my ($device) = @_;	2326	my ($device, $type) = @_;
2039		2327
2040	my $guid = "\x00" x 16;	2328	my $guid = "\x00" x 16;
2041		2329
2042	if ($device =~ s/^\{([A-Za-z0-9\-]+)\}//) {	2330	if ($device =~ s/^\{([A-Za-z0-9\-]+)\}//) {
2043	$guid = enc_guid $1	2331	$guid = enc_guid $1
2044	or die "$device: does not start with valid guid\n";	2332	or die "$device: does not start with valid guid\n";
2045	}	2333	}
2046		2334
2047	my ($descriptor, $tail) = enc_device_ $device;	2335	my ($descriptor, $tail) = enc_device_ $device, $type;
2048		2336
2049	length $tail	2337	length $tail
2050	and die "$device: garbage after device descriptor\n";	2338	and die "$device: garbage after device descriptor\n";
2051		2339
2052	unpack "H*", $guid . $descriptor	2340	unpack "H*", $guid . $descriptor
…		…
2067	$k = $bcd_objects{$k} // $k;	2355	$k = $bcd_objects{$k} // $k;
2068		2356
2069	my $type = $v->{Description}[0]{Type}[1];	2357	my $type = $v->{Description}[0]{Type}[1];
2070		2358
2071	if ($type != $bcd_object_types{$k}) {	2359	if ($type != $bcd_object_types{$k}) {
2072	$type = $bcd_types{$type} // sprintf "0x%08x", $type;	2360	$kv{type} = $bcd_types{$type} // sprintf "0x%08x", $type;
2073	$kv{type} = $type;
2074	}	2361	}
2075		2362
2076	my $elems = $v->{Elements}[1];	2363	my $elems = $v->{Elements}[1];
2077		2364
2078	while (my ($k, $v) = each %$elems) {	2365	while (my ($k, $v) = each %$elems) {
2079	my $k = hex $k;	2366	my $k = hex $k;
2080		2367
2081	my $v = $bcde_dec{$k & BCDE_FORMAT}->($v->[0]{Element}[1]);	2368	my $v = $bcde_dec{$k & BCDE_FORMAT}->($v->[0]{Element}[1], $type);
2082	my $k = dec_bcde_id $k;	2369	my $k = dec_bcde_id $k, $type;
2083		2370
2084	$kv{$k} = $v;	2371	$kv{$k} = $v;
2085	}	2372	}
2086		2373
2087	$bcd{$k} = \%kv;	2374	$bcd{$k} = \%kv;
…		…
2128	my %elem;	2415	my %elem;
2129		2416
2130	while (my ($k, $v) = each %$v) {	2417	while (my ($k, $v) = each %$v) {
2131	next if $k eq "type";	2418	next if $k eq "type";
2132		2419
2133	$k = (enc_bcde_id $k) // die "$k: invalid bcde element name or id\n";	2420	$k = (enc_bcde_id $k, $type) // die "$k: invalid bcde element name or id\n";
2134	$elem{sprintf "%08x", $k} = [{	2421	$elem{sprintf "%08x", $k} = [{
2135	Element => [ ($bcde_enc{$k & BCDE_FORMAT} // die "$k: unable to encode unknown bcd element type}")->($v)]	2422	Element => [ ($bcde_enc{$k & BCDE_FORMAT} // die "$k: unable to encode unknown bcd element type}")->($v)]
2136	}];	2423	}];
2137	}	2424	}
2138		2425
…		…
2154	Objects => [undef, \%objects],	2441	Objects => [undef, \%objects],
2155	}]]	2442	}]]
2156	}	2443	}
2157		2444
2158	#############################################################################	2445	#############################################################################
		2446	# edit instructions
		2447
		2448	sub bcd_edit_eval {
		2449	package pbcdedit;
		2450
		2451	our ($PATH, $BCD, $DEFAULT);
		2452
		2453	eval shift;
		2454	die "$@" if $@;
		2455	}
		2456
		2457	sub bcd_edit {
		2458	my ($path, $bcd, @insns) = @_;
		2459
		2460	my $default = $bcd->{"{bootmgr}"}{default};
		2461
		2462	# prepare "officially visible" variables
		2463	local $pbcdedit::PATH = $path;
		2464	local $pbcdedit::BCD = $bcd;
		2465	local $pbcdedit::DEFAULT = $default;
		2466
		2467	while (@insns) {
		2468	my $insn = shift @insns;
		2469
		2470	if ($insn eq "get") {
		2471	my $object = shift @insns;
		2472	my $elem = shift @insns;
		2473
		2474	$object = $object eq "{default}" ? $default : dec_wguid enc_wguid $object;
		2475
		2476	print $bcd->{$object}{$elem}, "\n";
		2477
		2478	} elsif ($insn eq "set") {
		2479	my $object = shift @insns;
		2480	my $elem = shift @insns;
		2481	my $value = shift @insns;
		2482
		2483	$object = $object eq "{default}" ? $default : dec_wguid enc_wguid $object;
		2484
		2485	$bcd->{$object}{$elem} = $value;
		2486
		2487	} elsif ($insn eq "del") {
		2488	my $object = shift @insns;
		2489	my $elem = shift @insns;
		2490
		2491	$object = $object eq "{default}" ? $default : dec_wguid enc_wguid $object;
		2492
		2493	delete $bcd->{$object}{$elem};
		2494
		2495	} elsif ($insn eq "eval") {
		2496	my $perl = shift @insns;
		2497	bcd_edit_eval "#line 1 'eval'\n$perl";
		2498
		2499	} elsif ($insn eq "do") {
		2500	my $path = shift @insns;
		2501	my $file = file_load $path;
		2502	bcd_edit_eval "#line 1 '$path'\n$file";
		2503
		2504	} else {
		2505	die "$insn: not a recognized instruction for create/edit/parse\n";
		2506	}
		2507	}
		2508
		2509	}
		2510
		2511	#############################################################################
		2512	# other utilities
2159		2513
2160	# json to stdout	2514	# json to stdout
2161	sub prjson($) {	2515	sub prjson($) {
2162	print $json_coder->encode ($_[0]);	2516	print $json_coder->encode ($_[0]);
2163	}	2517	}
…		…
2167	my $json;	2521	my $json;
2168	1 while read STDIN, $json, 65536, length $json;	2522	1 while read STDIN, $json, 65536, length $json;
2169	$json_coder->decode ($json)	2523	$json_coder->decode ($json)
2170	}	2524	}
2171		2525
2172	# all subcommands	2526	sub lsblk() {
		2527	my $lsblk = $json_coder->decode (scalar qx<lsblk --json -o PATH,KNAME,MAJ:MIN,TYPE,PTTYPE,PTUUID,PARTUUID,LABEL,FSTYPE>);
		2528
		2529	for my $dev (@{ $lsblk->{blockdevices} }) {
		2530	if ($dev->{type} eq "part") {
		2531
		2532	# lsblk sometimes gives a bogus pttype, so we recreate it here
		2533	$dev->{pttype} = $dev->{ptuuid} =~ /^$RE_GUID\z/
		2534	? "gpt" : "dos";
		2535
		2536	if ($dev->{pttype} eq "gpt") {
		2537	$dev->{bcd_device} = "partition=<null>,harddisk,gpt,$dev->{ptuuid},$dev->{partuuid}";
		2538	} elsif ($dev->{pttype} eq "dos") { # why not "mbr" :(
		2539	if ($dev->{partuuid} =~ /^([0-9a-f]{8})-([0-9a-f]{2})\z/i) {
		2540	my ($diskid, $partno) = ($1, hex $2);
		2541	$dev->{bcd_legacy_device} = "legacypartition=<null>,harddisk,mbr,$diskid,$partno";
		2542	if (open my $fh, "/sys/class/block/$dev->{kname}/start") {
		2543	my $start = 512 * readline $fh;
		2544	$dev->{bcd_device} = "partition=<null>,harddisk,mbr,$diskid,$start";
		2545	}
		2546	}
		2547	}
		2548	}
		2549	}
		2550
		2551	$lsblk->{blockdevices}
		2552	}
		2553
		2554	sub prdev($$) {
		2555	my ($path, $attribute) = @_;
		2556
		2557	# rather than stat'ing and guessing how devices are encoded, we use lsblk for this
		2558	my $mm = $json_coder->decode (scalar qx<lsblk -d -o MAJ:MIN -J \Q$path\E>)->{blockdevices}[0]{"maj:min"};
		2559
		2560	my $lsblk = lsblk;
		2561
		2562	for my $dev (@$lsblk) {
		2563	if ($dev->{"maj:min"} eq $mm && $dev->{$attribute}) {
		2564	say $dev->{$attribute};
		2565	exit 0;
		2566	}
		2567	}
		2568
		2569	exit 1;
		2570	}
		2571
		2572	#############################################################################
		2573	# command line parser
		2574
2173	our %CMD = (	2575	our %CMD = (
2174	help => sub {	2576	help => sub {
2175	require Pod::Usage;	2577	require Pod::Usage;
2176	Pod::Usage::pod2usage (-verbose => 2);	2578	Pod::Usage::pod2usage (-verbose => 2, -quotes => "none", -noperldoc => 1);
2177	},	2579	},
2178		2580
2179	objects => sub {	2581	objects => sub {
2180	my %rbcd_types = reverse %bcd_types;	2582	my %rbcd_types = reverse %bcd_types;
2181	$_ = sprintf "%08x", $_ for values %rbcd_types;	2583	$_ = sprintf "%08x", $_ for values %rbcd_types;
…		…
2202		2604
2203	print "\n";	2605	print "\n";
2204		2606
2205	printf "%-39s %-23s %s\n", "Object GUID", "Alias", "(Hex) Default Type";	2607	printf "%-39s %-23s %s\n", "Object GUID", "Alias", "(Hex) Default Type";
2206	for my $name (sort keys %rbcd_objects) {	2608	for my $name (sort keys %rbcd_objects) {
2207	my $guid = $rbcd_objects{$name};	2609	my $guid = $rbcd_objects{$name};
2208	my $type = $bcd_object_types{$name};	2610	my $type = $bcd_object_types{$name};
2209	my $tname = $bcd_types{$type};	2611	my $tname = $bcd_types{$type};
2210		2612
2211	$type = $type ? sprintf "(%08x) %s", $type, $tname : "-";	2613	$type = $type ? sprintf "(%08x) %s", $type, $tname : "-";
2212		2614
2213	printf "%-39s %-23s %s\n", $guid, $name, $type;	2615	printf "%-39s %-23s %s\n", $guid, $name, $type;
…		…
2227	BCDE_FORMAT_GUID_LIST , "guid list",	2629	BCDE_FORMAT_GUID_LIST , "guid list",
2228	BCDE_FORMAT_INTEGER , "integer",	2630	BCDE_FORMAT_INTEGER , "integer",
2229	BCDE_FORMAT_BOOLEAN , "boolean",	2631	BCDE_FORMAT_BOOLEAN , "boolean",
2230	BCDE_FORMAT_INTEGER_LIST, "integer list",	2632	BCDE_FORMAT_INTEGER_LIST, "integer list",
2231	);	2633	);
2232	my %rbcde = reverse %bcde;
2233	$_ = sprintf "%08x", $_ for values %rbcde;
2234		2634
2235	my %element;	2635	my @element;
2236		2636
		2637	for my $class (sort keys %rbcde_byclass) {
		2638	my $rbcde = $rbcde_byclass{$class};
		2639
2237	unless ($json) {	2640	unless ($json) {
2238	print "\n";	2641	print "\n";
		2642	printf "Elements applicable to class(es): $class\n";
2239	printf "%-9s %-12s %s\n", "Element", "Format", "Name Alias";	2643	printf "%-9s %-12s %s\n", "Element", "Format", "Name Alias";
2240	}	2644	}
2241	for my $name (sort keys %rbcde) {	2645	for my $name (sort keys %$rbcde) {
2242	my $id = $rbcde{$name};	2646	my $id = $rbcde->{$name};
2243	my $format = $format_name{(hex $id) & BCDE_FORMAT};	2647	my $format = $format_name{$id & BCDE_FORMAT};
2244		2648
2245	if ($json) {	2649	if ($json) {
2246	$element{$id} = [$format, $name];	2650	push @element, [$class, $id * 1, $format, $name];
2247	} else {	2651	} else {
		2652	$id = sprintf "%08x", $id;
2248	printf "%-9s %-12s %s\n", $id, $format, $name;	2653	printf "%-9s %-12s %s\n", $id, $format, $name;
		2654	}
2249	}	2655	}
2250	}	2656	}
2251	print "\n" unless $json;	2657	print "\n" unless $json;
2252		2658
2253	prjson {	2659	prjson {
2254	version => $JSON_VERSION,	2660	version => $JSON_VERSION,
2255	element => \%element,	2661	element => \@element,
		2662	class => \@bcde_typeclass,
2256	} if $json;	2663	} if $json;
2257		2664
2258	},	2665	},
2259		2666
2260	export => sub {	2667	export => sub {
2261	prjson bcd_decode regf_load shift;	2668	prjson bcd_decode regf_load shift;
2262	},	2669	},
2263		2670
2264	import => sub {	2671	import => sub {
2265	regf_save shift, bcd_encode rdjson;	2672	regf_save shift, bcd_encode rdjson;
		2673	},
		2674
		2675	create => sub {
		2676	my $path = shift;
		2677	my $stat = stat_get $path; # should actually be done at file load time
		2678	my $bcd = { };
		2679	bcd_edit $path, $bcd, @_;
		2680	regf_save $path, bcd_encode $bcd;
		2681	stat_set $path, $stat;
		2682	},
		2683
		2684	edit => sub {
		2685	my $path = shift;
		2686	my $stat = stat_get $path; # should actually be done at file load time
		2687	my $bcd = bcd_decode regf_load $path;
		2688	bcd_edit $path, $bcd, @_;
		2689	regf_save $path, bcd_encode $bcd;
		2690	stat_set $path, $stat;
		2691	},
		2692
		2693	parse => sub {
		2694	my $path = shift;
		2695	my $bcd = bcd_decode regf_load $path;
		2696	bcd_edit $path, $bcd, @_;
2266	},	2697	},
2267		2698
2268	"export-regf" => sub {	2699	"export-regf" => sub {
2269	prjson regf_load shift;	2700	prjson regf_load shift;
2270		2701
…		…
2273	"import-regf" => sub {	2704	"import-regf" => sub {
2274	regf_save shift, rdjson;	2705	regf_save shift, rdjson;
2275	},	2706	},
2276		2707
2277	lsblk => sub {	2708	lsblk => sub {
		2709	my $json = $_[0] eq "--json";
		2710
		2711	my $lsblk = lsblk;
		2712
		2713	if ($json) {
		2714	prjson $lsblk;
		2715	} else {
2278	printf "%-10s %-8.8s %-6.6s %-3s %s\n", "DEVICE", "LABEL", "FSTYPE", "PT", "DEVICE DESCRIPTOR";	2716	printf "%-10s %-8.8s %-6.6s %-3s %s\n", "DEVICE", "LABEL", "FSTYPE", "PT", "DEVICE DESCRIPTOR";
2279		2717	for my $dev (@$lsblk) {
2280	my $lsblk = $json_coder->decode (scalar qx<lsblk --json -o PATH,KNAME,TYPE,PTTYPE,PTUUID,PARTUUID,LABEL,FSTYPE>);	2718	for my $bcd ($dev->{bcd_device}, $dev->{bcd_legacy_device}) {
2281
2282	for my $dev (@{ $lsblk->{blockdevices} }) {
2283	my $pr = sub {
2284	printf "%-10s %-8.8s %-6.6s %-3s %s\n",	2719	printf "%-10s %-8.8s %-6.6s %-3s %s\n",
2285	$dev->{path}, $dev->{label}, $dev->{fstype}, $dev->{pttype}, $_[0];	2720	$dev->{path}, $dev->{label}, $dev->{fstype}, $dev->{pttype}, $bcd
2286	};
2287
2288	if ($dev->{type} eq "part") {
2289	if ($dev->{pttype} eq "gpt") {
2290	$pr->("partition=<null>,harddisk,gpt,$dev->{ptuuid},$dev->{partuuid}");
2291	} elsif ($dev->{pttype} eq "dos") { # why not "mbr" :(
2292	if ($dev->{partuuid} =~ /^([0-9a-f]{8})-([0-9a-f]{2})\z/i) {
2293	my ($diskid, $partno) = ($1, hex $2);
2294	$pr->("legacypartition=<null>,harddisk,mbr,$diskid,$partno");
2295	if (open my $fh, "/sys/class/block/$dev->{kname}/start") {
2296	my $start = 512 * readline $fh;
2297	$pr->("partition=<null>,harddisk,mbr,$diskid,$start");
2298	}	2721	if $bcd;
2299	}
2300	}	2722	}
2301	}	2723	}
2302	}	2724	}
2303	},	2725	},
		2726
		2727	"bcd-device" => sub {
		2728	prdev shift, "bcd_device";
		2729	},
		2730
		2731	"bcd-legacy-device" => sub {
		2732	prdev shift, "bcd_legacy_device";
		2733	},
		2734
		2735	version => sub {
		2736	print "\n",
		2737	"PBCDEDIT version $VERSION, copyright 2019 Marc A. Lehmann <pbcdedit\@schmorp.de>.\n",
		2738	"JSON schema version: $JSON_VERSION\n",
		2739	"Licensed under the GNU General Public License Version 3.0, or any later version.\n",
		2740	"\n",
		2741	$CHANGELOG,
		2742	"\n";
		2743	},
2304	);	2744	);
2305		2745
2306	my $cmd = shift;	2746	my $cmd = shift;
2307		2747
2308	unless (exists $CMD{$cmd}) {	2748	unless (exists $CMD{$cmd}) {

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