2 Made more improvements to the XPRESS, LZX, and LZMS compressors.
4 The default compression mode for wimcapture is now LZX compression in
5 its default mode, which is the same as '--compress=maximum'.
7 You can now specify an optional integer compression level to the
8 '--compress' option; e.g. '--compress=lzx:75'.
10 Made a minor change to the LZMS compressor and decompressor to fix an
11 incompatibility with the Microsoft implementation. In the unlikely
12 event that you created an LZMS-compressed WIM with wimlib v1.7.0 or
13 earlier and a checksum error is reported when extracting files from it
14 with wimlib v1.7.1, decompress it with v1.7.0 then compress it with
17 Added 'verify' subcommand to wimlib-imagex.
19 Notable library changes:
21 Custom compressor parameters have been removed from the library
22 in favor of the simpler level-based API.
24 Decompressor parameters have been removed entirely.
26 Library users can now specify a custom file for warning and
27 error messages to be sent to, rather than the default of
30 New progress messages:
31 WIMLIB_PROGRESS_MSG_EXTRACT_FILE_STRUCTURE,
32 WIMLIB_PROGRESS_MSG_EXTRACT_METADATA.
34 New function: wimlib_verify_wim().
37 Improved compression, decompression, and extraction performance.
39 Improved compatibility with version 3584 WIM / ESD files:
40 - Add support for reading and writing multiple solid blocks per
41 archive, which WIMGAPI/DISM can create when appending an image.
42 - Correctly create solid blocks larger than 4 GiB.
44 'add' commands passed to wimupdate will now replace existing
45 nondirectory files by default. Use the --no-replace option to get the
48 The license for the library now contains an exception that allows using
49 it under the LGPL. See the COPYING file for details.
51 In reparse-point fixup mode (the default for capture), symbolic links
52 and junctions that point outside the tree being captured are no longer
53 excluded from capture.
55 Added support for "WIMBoot" capture and extraction. See the
56 documentation for the new '--wimboot' option to wimcapture and wimapply
59 On UNIX-like systems, you can now backup and restore device nodes, named
60 pipes, and sockets. In addition, 32-bit user and group IDs are now
63 The way that UNIX data is stored in WIM files has been changed. If you
64 captured any WIMs with the --unix-data option, to upgrade them you'll
65 need to apply them with --unix-data using wimlib-imagex v1.6.2, then
66 re-capture them with --unix-data using this version.
68 wimlib now understands tagged metadata items, such as object IDs, that
69 can be stored in WIM directory entries.
71 Removed the --hardlink and --symlink options to wimapply, since I don't
72 think they are too useful and they got in the way of improving the code.
74 WIMs will now retain their GUIDs when rebuilt (e.g. with wimoptimize).
76 The 'mkwinpeimg' script now supports writing the ISO image to standard
79 The <ARCH> element in WIM XML data is now exported correctly.
81 On Windows, sparse file attributes are no longer set on extracted files.
82 Oddly enough, this actually saves disk space in some cases.
84 On UNIX, configuring with --disable-xattr or --enable-xattr is no longer
85 supported. Mounting WIM images now always requires extended attribute
86 support. Use --without-fuse to disable support for mounting WIM images;
87 this will also disable the need for extended attribute support.
89 Configuring with --enable-ssse3-sha1 now works correctly.
91 The shared library version has been bumped up. The main
92 incompatibilities are:
94 - WIMLIB_COMPRESSION_TYPE_XPRESS is now 1 and
95 WIMLIB_COMPRESSION_TYPE_LZX is now 2 (so it's the same as
98 - User-provided progress functions are now registered using a
99 separate function, wimlib_register_progress_function(). The
100 'progress_func' argument to many functions no longer exists.
102 - The return value from user-provided progress functions is now
105 - A context argument has been added to the prototype of
106 user-provided progress functions.
108 - 'struct wimlib_capture_config' has been removed. The library
109 now takes the path to the configuration file directly. This
110 affects wimlib_add_image(), wimlib_add_image_multisource(),
111 and wimlib_update_image(). However, a NULL value passed in
112 the argument retains the same meaning.
114 - Removed deprecated functions: some (de)compression functions,
115 wimlib_extract_files(), and wimlib_print_metadata().
117 - Removed extraction flags: WIMLIB_EXTRACT_FLAG_HARDLINK,
118 WIMLIB_EXTRACT_FLAG_SYMLINK, WIMLIB_EXTRACT_FLAG_FILE_ORDER,
119 and WIMLIB_EXTRACT_FLAG_SEQUENTIAL.
121 - Removed some progress messages:
122 WIMLIB_PROGRESS_MSG_APPLY_TIMESTAMPS,
123 WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_BEGIN,
124 WIMLIB_PROGRESS_MSG_EXTRACT_DIR_STRUCTURE_END. Numbering
127 - Removed some error codes. Numbering stays the same.
129 - Replaced WIMLIB_UNMOUNT_FLAG_LAZY with
130 WIMLIB_UNMOUNT_FLAG_FORCE.
132 - WIM paths passed to progress functions now have a leading
136 Case-insensitive comparisons of strings (e.g. filenames) containing
137 UTF-16 codepoints above 32767 are now done correctly.
139 Fixed build failure on Mac OS X.
141 wimunmount now provides the '--new-image' option to cause changes to a
142 read-write mounted image to be committed as a new image rather than as
143 an update of the mounted image. (The corresponding new library flag is
144 WIMLIB_UNMOUNT_FLAG_NEW_IMAGE.)
146 The LZMS ("recovery") compression chunk size, or "dictionary size", may
147 now be up to 1 GiB (1,073,741,824 bytes).
149 The performance of LZX ("maximum") and LZMS ("recovery") compression
150 with large chunk sizes has been slightly improved.
153 Stored files with size exactly 4 GiB (4,294,967,296 bytes) are now
154 decompressed correctly.
156 Fixed a bug in the LZX compressor introduced in v1.5.3. The bug
157 occurred in an unlikely case, and due to validity checks it did not
158 affect successfully created archives.
160 Fixed a minor compatibility issue with the LZMS compressor and
161 decompressor. This is *not* the default compression type and was only
162 introduced in v1.6.0. In the unlikely event that you created an
163 LZMS-compressed WIM with v1.6.0 and a checksum error is reported when
164 applying it with v1.6.1, decompress it with v1.6.0 then compress it with
167 Memory usage for LZMS and LZX compression has been decreased.
169 wimextract now allows wildcard characters in paths specified on the
170 command line. Also, the '--strict-wildcards' option has been removed
171 and replaced with the inverse option '--nullglob'. See the
172 documentation for wimextract for more details and changes.
174 The wimlib_extract_files() function is now considered deprecated in
175 favor of wimlib_extract_paths().
177 Fixed more permissions problems when extracting files on Windows.
179 A new '--no-attributes' option has been added to wimapply and
180 wimextract. The library flag is WIMLIB_EXTRACT_FLAG_NO_ATTRIBUTES.
182 The default chunk size is now set correctly when changing the
183 compression type of a WIM, for example with 'wimoptimize'.
185 The '--metadata' option to wiminfo has been replaced with the
186 '--detailed' option to wimdir.
188 In relevant wimlib-imagex commands, '--solid' may now be used as an
189 alias for '--pack-streams'.
192 Support for extracting and updating the new version 3584 WIMs has been
193 added. These WIMs typically pack many streams ("files") together into a
194 single compressed resource, thereby saving space. This degrades the
195 performance of random access (such as that which occurs on a mounted
196 image), but optimizations have been implemented for extraction. These
197 new WIM files also typically use a new compression format (LZMS), which
198 is similar to LZMA and can offer a better compression ratio than LZX.
199 These new WIM files can be created using `wimcapture' with
200 the '--compress=lzms --pack-streams' options. Note: this new WIM format
201 is used by the Windows 8 web downloader, but important segments of the
202 raw '.esd' files are encrypted, so wimlib will not be able to extract
203 such files until they are first decrypted.
205 wimlib now supports extracting files and directories from a WIM image
206 based on a "listfile" that itself contains the list of paths to extract.
207 For `wimextract', the syntax is to specify @LISTFILE instead of a PATH,
208 and for the library itself, the new APIs are wimlib_extract_pathlist()
209 and wimlib_extract_paths(). Path globs containing wildcard characters
212 For searching WIM files, wimlib now has configurable case sensitivity.
213 The default on Windows is still case-insensitive and the default on
214 UNIX-like systems is still case-sensitive, but this can be overridden
215 on either platform through flags to wimlib_global_init(). For
216 `wimlib-imagex', the environmental variable WIMLIB_IMAGEX_IGNORE_CASE
217 can be set to 1 or 0 for case-insensitive or case-sensitive behavior,
220 Support for compression chunk sizes greater than the default of 32768
221 bytes has been added. A larger chunk size typically results in a better
222 compression ratio. However, the MS implementation is seemingly not
223 compatible with all chunk sizes, especially for LZX compression, so the
224 defaults remain unchanged, with the exception of the new LZMS-compressed
225 WIMs, which use a larger chunk size by default.
227 The compression/decompression API exported by wimlib has been changed.
228 Now one set of functions handles all supported compression formats.
230 `wimcapture' and `wimappend' will now display the progress of scanning
231 the directory tree to capture, in addition to the progress of writing
232 data to the WIM. The '--verbose' option no longer does anything. The
233 library API change for this is the addition of several members to
234 `struct wimlib_progress_info_scan' available to progress callbacks.
236 `mkwinpeimg' now correctly handles the '--start-script' option when the
237 start script is not in the working directory.
239 Sequential extraction, previously requested by using
240 WIMLIB_EXTRACT_FLAG_SEQUENTIAL, is now the default.
241 WIMLIB_EXTRACT_FLAG_FILE_ORDER can be used to get the old default
242 behavior (extract in file order).
245 The new LZX compressor added in v1.5.2 has been improved and is now
246 enabled by default, except when `wimcapture' or `wimappend' is run
247 *without* the '--compress' option, in which case the faster LZX
248 compressor is used (the same as before). This behavior is reasonably
249 consistent with ImageX which actually uses "fast" (XPRESS) compression
250 by default. In those cases, use '--compress=maximum' to explicitly
251 capture a WIM image using the new (slower but better) LZX compressor.
253 The '--compress-slow' option still exists to `wimlib-imagex optimize',
254 but its new behavior is to tweak the new LZX compressor even more to
255 produce an even better compression ratio at the cost of more time spent
258 `wimlib-imagex optimize' now supports the '--compress=TYPE' option,
259 which recompresses the WIM file using the specified compression TYPE.
260 The new library API function used for this is
261 wimlib_set_output_compression_type().
263 Added the wimlib_get_xml_data() function to allow library clients to
264 easily retrieve the raw XML data from a WIM file if needed.
266 Fixed a bug that could cause an error code to be incorrectly returned
267 when writing XML data containing a <WINDOWS> element.
269 Mounted WIM images will now correctly show the default file stream even
270 if appears in the alternate data stream entries of the corresponding WIM
274 Added a new experimental LZX compressor which can be enabled by passing
275 '--compress-slow' to `wimlib-imagex capture' or `wimlib-imagex
276 optimize'. (The latter is only applicable if the WIM is already
277 LZX-compressed and the '--recompress' option is also given.) The
278 experimental compressor is much slower but compresses the data slightly
279 more --- currently usually to within a fraction of a percent of the
280 results from WIMGAPI/ImageX.
282 A workaround has been added for compatibility with versions of WinPE
283 that interpret alternate data stream entries in the boot WIM
286 An alignment bug that caused a crash in the LZX decompressor on some
289 wimlib now attempts to clear the WIM_HDR_FLAG_WRITE_IN_PROGRESS flag in
290 the WIM header when restoring the previous state of a WIM it failed to
293 Added a workaround to avoid an access denied error on Windows when
294 replacing a WIM file that another process has opened.
297 wimlib can now open WinPE WIMs from WAIK v2.1, which had a quirk that
298 needed to be handled.
300 A bug in the interpretation of negative IMAGE indices in the
301 --update-of=[WIMFILE:]IMAGE option to `wimlib-imagex capture' and
302 `wimlib-imagex append' has been fixed.
304 A workaround has been added to successfully apply security descriptors
305 with empty DACLs when the NTFS-3g apply mode is being used with NTFS-3g
306 2013.1.13 or earlier.
308 `wimlib-imagex capture' can now accept the '--delta-from' option
312 Added support for "pipable" WIMs. Pipable WIMs allow capturing images
313 to standard output and applying images from standard input, but they are
314 not compatible with Microsoft's software and are not created by default.
315 See the documentation for --pipable flag of `wimlib-imagex capture' for
318 To better support incremental backups, added support for declaring an
319 image as a modified form of another image. See the documentation for
320 the '--update-of' option of `wimlib-imagex append' and `wimlib-imagex
323 Added supported for "delta" WIMs. See the documentation for the
324 '--delta-from' option of `wimlib-imagex capture'.
326 The library support for managing split WIMs has been changed to support
327 other arrangements, such as delta WIMs, and be easier to use. This
328 change is visible in `wimlib-imagex', which also can now accept the
329 '--ref' option multiple times, and also now supports "delta" WIMs as
332 wimlib now preserves WIM integrity tables by default, even if
333 WIMLIB_WRITE_FLAG_CHECK_INTEGRITY is not specified. This changes the
334 behavior of `wimlib-imagex' whenever the WIM being operated on contains
335 an integrity table and the '--check' option is not specified.
337 `wimlib-imagex capture' now creates LZX-compressed WIMs by default
338 (when --compress is not specified). This provides the best compression
339 ratio by default, which is usually what is desired, at a cost of some
342 `wimlib-imagex' now supports being invoked as wimCOMMAND, where COMMAND
343 is the command as in `wimlib-imagex COMMAND'; for example, it can be
344 invoked as `wimapply' as an alternative to `wimlib-imagex apply'. The
345 appropriate hard links are created in UNIX installations of
346 `wimlib-imagex', while for the Windows distribution of `wimlib-imagex',
347 batch files that emulate this behavior are generated.
349 Security descriptors are now extracted correctly on Windows.
351 Fixed archiving DOS names in NTFS-3g capture mode.
353 The extraction code has been rewritten and it will now be easier to
354 support new features on all supported backends (currently Win32, UNIX,
355 and NTFS-3g). For example, hard-linked extraction mode (--hardlink) is
356 now supported on all backends, not just UNIX.
358 `mkwinpeimg' now supports grabbing files from the WAIK supplement rather
359 than the WAIK itself.
361 wimlib_global_init() now, by default, attempts to acquire additional
362 privileges on Windows, so library clients need not do this.
364 This update bumps the shared library version number up to 9, since it is
365 not binary compatibible with previous releases.
368 Fixed bug in `wimlib-imagex export' that made it impossible to export an
369 image from a WIM that is readonly at the filesystem level.
371 Return error code rather than segfaulting when trying to list files from
372 a non-first part of a split WIM.
374 Joining a WIM will now preserve the RP_FIX and READONLY flags.
377 On Windows, paths given to wimlib-imagex are now treated case
380 Improved behavior regarding invalid filenames; in particular, on
381 Windows, wimlib-imagex will, when extracting, now omit (with an option
382 to override this default) filenames differing only in case, or filenames
383 containing characters not valid on Windows.
385 On Windows, wimlib now supports capturing and extracting long paths
386 (longer than the so-called MAX_PATH).
388 On Windows, `wimlib-imagex update' now acquires proper privileges when
389 running as an Administrator.
391 `wimlib-imagex update' will now complain if no image is specified when
392 trying to update a multi-image WIM.
394 `wimlib-imagex update' now supports specifying a single update command
395 directly on the command line using the --command option.
397 wimlib-imagex will now choose different units for progress messages,
398 depending on the amount of data that needs to be processed.
400 `wimlib-imagex append' will now generate a unique WIM image name if no
401 name is specified and the defaulted name already exists in the WIM.
403 wimlib now allows you to create unnamed WIM images, which can then only
404 be referred to by index.
406 wimlib now allows you to explicitly declare you want write access to a
407 WIM by providing the WIMLIB_OPEN_FLAG_WRITE_ACCESS flag to
410 wimlib now respects the WIM_HDR_FLAG_READONLY flag when set in the WIM
413 Progress callbacks have been added to wimlib's wimlib_update_image()
416 Added wimlib_get_wim_info(), wimlib_set_wim_info(),
417 wimlib_iterate_dir_tree(), and wimlib_iterate_lookup_table() functions
420 NTFS-3g capture now only warns about two conditions previously treated
423 Fixed a couple issues with using wimlib-imagex on UDF filesystems on
426 wimlib now correctly detects and returns an error when reading a WIM
427 image with a cyclic directory structure. (Fun fact: such a WIM will
428 crash Microsoft's software.)
431 Added new "extract" and "update" subcommands to wimlib-imagex, along
432 with associated APIs in the library. These commands are intended mainly
433 for Windows use but can be used on UNIX as well.
435 Many documentation improvements.
437 Fixed a bug in the Windows build where relative symbolic links were not
438 captured in reparse-point fixup mode.
440 Fixed a bug in the Windows build where file handles were left open to
441 the WIM file, causing `wimlib_imagex optimize' to fail in some cases.
443 Fixed a bug in the Windows build of wimlib-imagex where globbing
444 split-WIM parts could cause the program to crash.
446 Fixed a bug where the creation time of WIM images would be shown instead
447 of the last modification time.
449 With the Windows build it is now possible to restore a WIM containing
450 symbolic links as a non-Administrator; however you will receive warnings
451 about not being able to extract the symbolic links.
454 Capturing a WIM image should now be significantly faster in most cases
455 due to improved use of the operating system's cache and avoiding reading
456 files twice whenever possible.
458 The Windows build should now work on Windows XP.
460 The Windows build now supports capturing and restoring hidden,
461 compressed, sparse, and encrypted files.
463 The Windows build now supports capturing and applying WIM images from
464 filesystems other than NTFS (with some reduced functionality).
466 The Windows build now extracts short names correctly.
468 Added support for "reparse-point" fixups (i.e. fixing up of symbolic
469 links). See docs for --rpfix and --norpfix flags of `wimlib-imagex
470 capture' and `wimlib-imagex apply'.
472 The performance of splitting and joining WIMs should be slightly
475 The LZX and XPRESS compression and decompression functions are now
476 exported from the library.
479 Improvements and bugfixes for the Windows build.
481 Added --strict-acls options.
483 Fixed the way that wimlib determines the order of images in the WIM.
486 Since wimlib can now be used on Windows, wimlib's implementation of
487 ImageX has been renamed to wimlib-imagex to avoid confusion with
488 Microsoft's implementation of ImageX, which would have the same file
489 name ("imagex.exe"). If you really don't like this you can pass the
490 --with-imagex-progname option to `configure' to choose a different name,
491 or even simply rename the binary yourself (but the former way will
492 configure the man pages to use the chosen name).
494 Various bugs fixed in the Windows build. Mainly to do with capturing
495 and restoring alternate data streams correctly in weird cases, and
496 requesting the correct privileges when opening files. Also added the
497 --noacls options to wimlib-imagex capture, append, and apply.
499 Windows build again: FindFirstStreamW() and FindNextStreamW() are now
500 dynamically loaded, so this may make the library compatible with Windows
501 XP (however, there may still be other problems).
504 Added experimental support for native Windows builds. Binaries can be
505 downloaded from the SourceForge page.
507 --source-list option added to `imagex capture' and `imagex append'.
509 Better support for different character encodings.
512 Storing UNIX file owners, groups, and modes in WIM images is now
513 possible using `imagex capture' with the --unix-data flag.
515 Minor bug fixes and documentation fixes.
518 NTFS capture: Fixed capturing duplicate reparse points.
520 NTFS capture: Capture first unnamed stream if there are more than one
521 (print warning instead of error).
523 Allow multiple test cases to execute concurrently (e.g. make -j2 check).
526 Added --arch switch to mkwinpeimg script to support getting AMD64 WinPE
529 Update to work with ntfs-3g version 2013.1.13.
532 Fixed truncating file to shorter but non-zero length on read-write
535 Various code cleanups and minor documentation fixes.
538 LZX and XPRESS decompression have received some additional optimizations
539 and should now be even faster. (Although, they were already pretty
540 fast--- much faster than typical I/O speeds.)
542 Fixed a bug introduced in v1.2.1 that would cause a directory tree
543 containing hard links to be captured incorrectly in some cases.
546 By default, unmounting a read-write mounted WIM with 'imagex unmount
547 --commit' will now change the WIM in-place without needing to write the
548 entire WIM again. Use 'imagex unmount --commit --rebuild' to get the
551 'imagex unmount' no longer has a hard-coded limit of 10 minutes to wait
552 for a response from the daemon servicing the mounted WIM. Instead,
553 every second 'imagex unmount' will check if the daemon is still alive,
554 and keep waiting if so, otherwise terminate with an error.
556 'imagex unmount --commit' on a read-write mounted WIM will now print
557 progress information regarding the writing of new or modified streams
558 the WIM, just like when capturing or appending a WIM.
560 A small change has been made to XPRESS compression and it should improve
561 the compression ratio slightly.
563 A change was made that may improve performance slightly when applying a
564 WIM image to a NTFS volume.
566 Microsoft has managed to introduce even more bugs into their software,
567 and now the WIMs for Windows 8 have incorrect (too low) reference counts
568 for some streams. This is unsafe because such streams can be removed
569 when they are in actuality still referenced in the WIM (perhaps by a
570 different image). wimlib will now work around this problem by fixing
571 the stream reference counts. This is only done when wimlib_delete_image() is
572 called ('imagex delete') or when wimlib_mount_image() is called with
573 WIMLIB_MOUNT_FLAG_READWRITE ('imagex mountrw'). Please note that this
574 requires reading the metadata for all images in the WIM, so this will
575 make these operations noticably slower on WIMs with multiple images.
577 Various other bugfixes.
580 Appending images to a WIM is now be done by default without re-building
581 the whole WIM. Use the --rebuild flag to get the old behavior (which
582 was to re-build the entire WIM when a new image is appended).
584 A new command `imagex optimize' is now available to manually re-build a
585 WIM that has wasted space due to repeated appends.
587 Progress information has been improved, and now arbitrary callback
588 functions can be used to show the progress of a WIM operation.
590 A possible bug with changing the bootable image of a WIM was fixed.
592 Some advisory locking is now done to prevent two processes from
593 modifying a WIM at the same time (but only in some cases). For example,
594 you cannot mount two images from a WIM read-write at the same time.
596 Some functions have been reorganized:
597 * wimlib_mount() renamed to wimlib_mount_image().
598 * wimlib_unmount() renamed to wimlib_unmount_image().
599 * wimlib_overwrite_xml_and_header() removed as
600 wimlib_overwrite() suffices now.
601 * wimlib_apply_image_to_ntfs_volume() removed as
602 wimlib_extract_image() suffices now.
603 * wimlib_add_image_from_ntfs_volume() removed as
604 * wimlib_add_image() suffices now.
606 Previously, the soname of libwim.so has been 0.0.0, despite many
607 interface changes. The soname is now updated to 1.0.0 and will now be
608 updated each release.
611 Resources will now be compressed using multiple threads by default.
612 (This applies to `imagex capture', `imagex append', and `imagex
615 Some performance improvements in mounted WIMs.
617 More progress information is shown when capturing a WIM.
620 Lots of minor fixes, code cleanups, and some documentation updates.
621 Nothing in particular is really noteworthy.
624 LZX and XPRESS compression improvements.
626 Fixed calculation of Directory Count, File Count, Total Bytes, and Hard
627 Link Bytes of the WIM.
630 Fixed bug when capturing NTFS file with multiple named data streams.
632 Internally, we are now using inode structures, even though these don't
633 appear literally in the WIM file. This simplifies some of the code
634 (mainly for WIM mounting) and likely fixed a few problems, although it
638 Fixed problem when exporting images from XPRESS to LZX compressed WIM or
642 Enough changes to call it version 1.0.0!
644 Capturing a WIM directly from a NTFS volume, and applying a WIM directly
645 to a NTFS volume, is now supported.
647 Hard links and symbolic links have much improved support. They are
648 supported for WIM capture, WIM application, and mounted WIMs (you can
649 even make them on read-write mounted WIMs).
651 Alternate data streams are now supported on mounted WIMs through an
652 xattr or a Windows-style stream interface. Also they are supported when
653 capturing a WIM from NTFS or applying a WIM to NTFS.
655 Split WIMs are better supported. You may now apply an image directly
656 from a split WIM, mount an image from a split WIM read-only, or export
657 an image from a split WIM.
659 Using a capture configuration file is now supported (but not fully yet).
661 SHA1 message digests are checked in more places, so we can make sure
662 applied and captured data is correct.
664 Man pages have been updated and consolidated.
667 Fixed segfault when unmounting read-only WIM.
670 Support for joining and splitting WIMs.
671 Also, security data is now preserved by default.
674 Can now build with older gcc and system headers, like on CentOS 5.
677 Fixed bug that made it impossible to overwrite files in read-write
681 Write byte-order mark before WIM XML data. (imagex.exe requires this to
git://wimlib.net / wimlib / blob