-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathNEWS
1623 lines (1151 loc) · 64.6 KB
/
NEWS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
XZ Utils Release Notes
======================
5.4.1 (2023-01-11)
* liblzma:
- Fixed the return value of lzma_microlzma_encoder() if the
LZMA options lc/lp/pb are invalid. Invalid lc/lp/pb options
made the function return LZMA_STREAM_END without encoding
anything instead of returning LZMA_OPTIONS_ERROR.
- Windows / Visual Studio: Workaround a possible compiler bug
when targeting 32-bit x86 and compiling the CLMUL version of
the CRC64 code. The CLMUL code isn't enabled by the Windows
project files but it is in the CMake-based builds.
* Build systems:
- Windows-specific CMake changes:
* Don't try to enable CLMUL CRC64 code if _mm_set_epi64x()
isn't available. This fixes CMake-based build with Visual
Studio 2013.
* Created a workaround for a build failure with windres
from GNU binutils. It is used only when the C compiler
is GCC (not Clang). The workaround is incompatible
with llvm-windres, resulting in "XZx20Utils" instead
of "XZ Utils" in the resource file, but without the
workaround llvm-windres works correctly. See the
comment in CMakeLists.txt for details.
* Included the resource files in the xz and xzdec build
rules. Building the command line tools is still
experimental but possible with MinGW-w64.
- Visual Studio: Added stream_decoder_mt.c to the project
files. Now the threaded decompressor lzma_stream_decoder_mt()
gets built. CMake-based build wasn't affected.
- Updated windows/INSTALL-MSVC.txt to mention that CMake-based
build is now the preferred method with Visual Studio. The
project files will probably be removed after 5.4.x releases.
- Changes to #defines in config.h:
* HAVE_DECL_CLOCK_MONOTONIC was replaced by
HAVE_CLOCK_MONOTONIC. The old macro was always defined
in configure-generated config.h to either 0 or 1. The
new macro is defined (to 1) only if the declaration of
CLOCK_MONOTONIC is available. This matches the way most
other config.h macros work and makes things simpler with
other build systems.
* HAVE_DECL_PROGRAM_INVOCATION_NAME was replaced by
HAVE_PROGRAM_INVOCATION_NAME for the same reason.
* Tests:
- Fixed test script compatibility with ancient /bin/sh
versions. Now the five test_compress_* tests should
no longer fail on Solaris 10.
- Added and refactored a few tests.
* Translations:
- Updated the Catalan and Esperanto translations.
- Added Korean and Ukrainian man page translations.
5.4.0 (2022-12-13)
This bumps the minor version of liblzma because new features were
added. The API and ABI are still backward compatible with liblzma
5.2.x and 5.0.x.
Since 5.3.5beta:
* All fixes from 5.2.10.
* The ARM64 filter is now stable. The xz option is now --arm64.
Decompression requires XZ Utils 5.4.0. In the future the ARM64
filter will be supported by XZ for Java, XZ Embedded (including
the version in Linux), LZMA SDK, and 7-Zip.
* Translations:
- Updated Catalan, Croatian, German, Romanian, and Turkish
translations.
- Updated German man page translations.
- Added Romanian man page translations.
Summary of new features added in the 5.3.x development releases:
* liblzma:
- Added threaded .xz decompressor lzma_stream_decoder_mt().
It can use multiple threads with .xz files that have multiple
Blocks with size information in Block Headers. The threaded
encoder in xz has always created such files.
Single-threaded encoder cannot store the size information in
Block Headers even if one used LZMA_FULL_FLUSH to create
multiple Blocks, so this threaded decoder cannot use multiple
threads with such files.
If there are multiple Streams (concatenated .xz files), one
Stream will be decompressed completely before starting the
next Stream.
- A new decoder flag LZMA_FAIL_FAST was added. It makes the
threaded decompressor report errors soon instead of first
flushing all pending data before the error location.
- New Filter IDs:
* LZMA_FILTER_ARM64 is for ARM64 binaries.
* LZMA_FILTER_LZMA1EXT is for raw LZMA1 streams that don't
necessarily use the end marker.
- Added lzma_str_to_filters(), lzma_str_from_filters(), and
lzma_str_list_filters() to convert a preset or a filter chain
string to a lzma_filter[] and vice versa. These should make
it easier to write applications that allow users to specify
custom compression options.
- Added lzma_filters_free() which can be convenient for freeing
the filter options in a filter chain (an array of lzma_filter
structures).
- lzma_file_info_decoder() to makes it a little easier to get
the Index field from .xz files. This helps in getting the
uncompressed file size but an easy-to-use random access
API is still missing which has existed in XZ for Java for
a long time.
- Added lzma_microlzma_encoder() and lzma_microlzma_decoder().
It is used by erofs-utils and may be used by others too.
The MicroLZMA format is a raw LZMA stream (without end marker)
whose first byte (always 0x00) has been replaced with
bitwise-negation of the LZMA properties (lc/lp/pb). It was
created for use in EROFS but may be used in other contexts
as well where it is important to avoid wasting bytes for
stream headers or footers. The format is also supported by
XZ Embedded (the XZ Embedded version in Linux got MicroLZMA
support in Linux 5.16).
The MicroLZMA encoder API in liblzma can compress into a
fixed-sized output buffer so that as much data is compressed
as can be fit into the buffer while still creating a valid
MicroLZMA stream. This is needed for EROFS.
- Added lzma_lzip_decoder() to decompress the .lz (lzip) file
format version 0 and the original unextended version 1 files.
Also lzma_auto_decoder() supports .lz files.
- lzma_filters_update() can now be used with the multi-threaded
encoder (lzma_stream_encoder_mt()) to change the filter chain
after LZMA_FULL_BARRIER or LZMA_FULL_FLUSH.
- In lzma_options_lzma, allow nice_len = 2 and 3 with the match
finders that require at least 3 or 4. Now it is internally
rounded up if needed.
- CLMUL-based CRC64 on x86-64 and E2K with runtime processor
detection. On 32-bit x86 it currently isn't available unless
--disable-assembler is used which can make the non-CLMUL
CRC64 slower; this might be fixed in the future.
- Building with --disable-threads --enable-small
is now thread-safe if the compiler supports
__attribute__((__constructor__)).
* xz:
- Using -T0 (--threads=0) will now use multi-threaded encoder
even on a single-core system. This is to ensure that output
from the same xz binary is identical on both single-core and
multi-core systems.
- --threads=+1 or -T+1 is now a way to put xz into
multi-threaded mode while using only one worker thread.
The + is ignored if the number is not 1.
- A default soft memory usage limit is now used for compression
when -T0 is used and no explicit limit has been specified.
This soft limit is used to restrict the number of threads
but if the limit is exceeded with even one thread then xz
will continue with one thread using the multi-threaded
encoder and this limit is ignored. If the number of threads
is specified manually then no default limit will be used;
this affects only -T0.
This change helps on systems that have very many cores and
using all of them for xz makes no sense. Previously xz -T0
could run out of memory on such systems because it attempted
to reserve memory for too many threads.
This also helps with 32-bit builds which don't have a large
amount of address space that would be required for many
threads. The default soft limit for -T0 is at most 1400 MiB
on all 32-bit platforms.
- Previously a low value in --memlimit-compress wouldn't cause
xz to switch from multi-threaded mode to single-threaded mode
if the limit cannot otherwise be met; xz failed instead. Now
xz can switch to single-threaded mode and then, if needed,
scale down the LZMA2 dictionary size too just like it already
did when it was started in single-threaded mode.
- The option --no-adjust no longer prevents xz from scaling down
the number of threads as that doesn't affect the compressed
output (only performance). Now --no-adjust only prevents
adjustments that affect compressed output, that is, with
--no-adjust xz won't switch from multi-threaded mode to
single-threaded mode and won't scale down the LZMA2
dictionary size.
- Added a new option --memlimit-mt-decompress=LIMIT. This is
used to limit the number of decompressor threads (possibly
falling back to single-threaded mode) but it will never make
xz refuse to decompress a file. This has a system-specific
default value because without any limit xz could end up
allocating memory for the whole compressed input file, the
whole uncompressed output file, multiple thread-specific
decompressor instances and so on. Basically xz could
attempt to use an insane amount of memory even with fairly
common files. The system-specific default value is currently
the same as the one used for compression with -T0.
The new option works together with the existing option
--memlimit-decompress=LIMIT. The old option sets a hard limit
that must not be exceeded (xz will refuse to decompress)
while the new option only restricts the number of threads.
If the limit set with --memlimit-mt-decompress is greater
than the limit set with --memlimit-compress, then the latter
value is used also for --memlimit-mt-decompress.
- Added new information to the output of xz --info-memory and
new fields to the output of xz --robot --info-memory.
- In --lzma2=nice=NUMBER allow 2 and 3 with all match finders
now that liblzma handles it.
- Don't mention endianness for ARM and ARM-Thumb filters in
--long-help. The filters only work for little endian
instruction encoding but modern ARM processors using
big endian data access still use little endian
instruction encoding. So the help text was misleading.
In contrast, the PowerPC filter is only for big endian
32/64-bit PowerPC code. Little endian PowerPC would need
a separate filter.
- Added decompression support for the .lz (lzip) file format
version 0 and the original unextended version 1. It is
autodetected by default. See also the option --format on
the xz man page.
- Sandboxing enabled by default:
* Capsicum (FreeBSD)
* pledge(2) (OpenBSD)
* Scripts now support the .lz format using xz.
* A few new tests were added.
* The liblzma-specific tests are now supported in CMake-based
builds too ("make test").
5.3.5beta (2022-12-01)
* All fixes from 5.2.9.
* liblzma:
- Added new LZMA_FILTER_LZMA1EXT for raw encoder and decoder to
handle raw LZMA1 streams that don't have end of payload marker
(EOPM) alias end of stream (EOS) marker. It can be used in
filter chains, for example, with the x86 BCJ filter.
- Added lzma_str_to_filters(), lzma_str_from_filters(), and
lzma_str_list_filters() to make it easier for applications
to get custom compression options from a user and convert
it to an array of lzma_filter structures.
- Added lzma_filters_free().
- lzma_filters_update() can now be used with the multi-threaded
encoder (lzma_stream_encoder_mt()) to change the filter chain
after LZMA_FULL_BARRIER or LZMA_FULL_FLUSH.
- In lzma_options_lzma, allow nice_len = 2 and 3 with the match
finders that require at least 3 or 4. Now it is internally
rounded up if needed.
- ARM64 filter was modified. It is still experimental.
- Fixed LTO build with Clang if -fgnuc-version=10 or similar
was used to make Clang look like GCC >= 10. Now it uses
__has_attribute(__symver__) which should be reliable.
* xz:
- --threads=+1 or -T+1 is now a way to put xz into multi-threaded
mode while using only one worker thread.
- In --lzma2=nice=NUMBER allow 2 and 3 with all match finders
now that liblzma handles it.
* Updated translations: Chinese (simplified), Korean, and Turkish.
5.3.4alpha (2022-11-15)
* All fixes from 5.2.7 and 5.2.8.
* liblzma:
- Minor improvements to the threaded decoder.
- Added CRC64 implementation that uses SSSE3, SSE4.1, and CLMUL
instructions on 32/64-bit x86 and E2K. On 32-bit x86 it's
not enabled unless --disable-assembler is used but then
the non-CLMUL code might be slower. Processor support is
detected at runtime so this is built by default on x86-64
and E2K. On these platforms, if compiler flags indicate
unconditional CLMUL support (-msse4.1 -mpclmul) then the
generic version is not built, making liblzma 8-9 KiB smaller
compared to having both versions included.
With extremely compressible files this can make decompression
up to twice as fast but with typical files 5 % improvement
is a more realistic expectation.
The CLMUL version is slower than the generic version with
tiny inputs (especially at 1-8 bytes per call, but up to
16 bytes). In normal use in xz this doesn't matter at all.
- Added an experimental ARM64 filter. This is *not* the final
version! Files created with this experimental version won't
be supported in the future versions! The filter design is
a compromise where improving one use case makes some other
cases worse.
- Added decompression support for the .lz (lzip) file format
version 0 and the original unextended version 1. See the
API docs of lzma_lzip_decoder() for details. Also
lzma_auto_decoder() supports .lz files.
- Building with --disable-threads --enable-small
is now thread-safe if the compiler supports
__attribute__((__constructor__))
* xz:
- Added support for OpenBSD's pledge(2) as a sandboxing method.
- Don't mention endianness for ARM and ARM-Thumb filters in
--long-help. The filters only work for little endian
instruction encoding but modern ARM processors using
big endian data access still use little endian
instruction encoding. So the help text was misleading.
In contrast, the PowerPC filter is only for big endian
32/64-bit PowerPC code. Little endian PowerPC would need
a separate filter.
- Added --experimental-arm64. This will be renamed once the
filter is finished. Files created with this experimental
filter will not be supported in the future!
- Added new fields to the output of xz --robot --info-memory.
- Added decompression support for the .lz (lzip) file format
version 0 and the original unextended version 1. It is
autodetected by default. See also the option --format on
the xz man page.
* Scripts now support the .lz format using xz.
* Build systems:
- New #defines in config.h: HAVE_ENCODER_ARM64,
HAVE_DECODER_ARM64, HAVE_LZIP_DECODER, HAVE_CPUID_H,
HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR, HAVE_USABLE_CLMUL
- New configure options: --disable-clmul-crc,
--disable-microlzma, --disable-lzip-decoder, and
'pledge' is now an option in --enable-sandbox (but
it's autodetected by default anyway).
- INSTALL was updated to document the new configure options.
- PACKAGERS now lists also --disable-microlzma and
--disable-lzip-decoder as configure options that must
not be used in builds for non-embedded use.
* Tests:
- Fix some of the tests so that they skip instead of fail if
certain features have been disabled with configure options.
It's still not perfect.
- Other improvements to tests.
* Updated translations: Croatian, Finnish, Hungarian, Polish,
Romanian, Spanish, Swedish, and Ukrainian.
5.3.3alpha (2022-08-22)
* All fixes from 5.2.6.
* liblzma:
- Fixed 32-bit build.
- Added threaded .xz decompressor lzma_stream_decoder_mt().
It can use multiple threads with .xz files that have multiple
Blocks with size information in Block Headers. The threaded
encoder in xz has always created such files.
Single-threaded encoder cannot store the size information in
Block Headers even if one used LZMA_FULL_FLUSH to create
multiple Blocks, so this threaded decoder cannot use multiple
threads with such files.
If there are multiple Streams (concatenated .xz files), one
Stream will be decompressed completely before starting the
next Stream.
- A new decoder flag LZMA_FAIL_FAST was added. It makes the
threaded decompressor report errors soon instead of first
flushing all pending data before the error location.
* xz:
- Using -T0 (--threads=0) will now use multi-threaded encoder
even on a single-core system. This is to ensure that output
from the same xz binary is identical on both single-core and
multi-core systems.
- A default soft memory usage limit is now used for compression
when -T0 is used and no explicit limit has been specified.
This soft limit is used to restrict the number of threads
but if the limit is exceeded with even one thread then xz
will continue with one thread using the multi-threaded
encoder and this limit is ignored. If the number of threads
is specified manually then no default limit will be used;
this affects only -T0.
This change helps on systems that have very many cores and
using all of them for xz makes no sense. Previously xz -T0
could run out of memory on such systems because it attempted
to reserve memory for too many threads.
This also helps with 32-bit builds which don't have a large
amount of address space that would be required for many
threads. The default limit is 1400 MiB on all 32-bit
platforms with -T0.
Now xz -T0 should just work. It might use too few threads
in some cases but at least it shouldn't easily run out of
memory. It's possible that this will be tweaked before 5.4.0.
- Changes to --memlimit-compress and --no-adjust:
In single-threaded mode, --memlimit-compress can make xz
scale down the LZMA2 dictionary size to meet the memory usage
limit. This obviously affects the compressed output. However,
if xz was in threaded mode, --memlimit-compress could make xz
reduce the number of threads but it wouldn't make xz switch
from multi-threaded mode to single-threaded mode or scale
down the LZMA2 dictionary size. This seemed illogical.
Now --memlimit-compress can make xz switch to single-threaded
mode if one thread in multi-threaded mode uses too much
memory. If memory usage is still too high, then the LZMA2
dictionary size can be scaled down too.
The option --no-adjust was also changed so that it no longer
prevents xz from scaling down the number of threads as that
doesn't affect compressed output (only performance). After
this commit --no-adjust only prevents adjustments that affect
compressed output, that is, with --no-adjust xz won't switch
from multithreaded mode to single-threaded mode and won't
scale down the LZMA2 dictionary size.
- Added a new option --memlimit-mt-decompress=LIMIT. This is
used to limit the number of decompressor threads (possibly
falling back to single-threaded mode) but it will never make
xz refuse to decompress a file. This has a system-specific
default value because without any limit xz could end up
allocating memory for the whole compressed input file, the
whole uncompressed output file, multiple thread-specific
decompressor instances and so on. Basically xz could
attempt to use an insane amount of memory even with fairly
common files.
The new option works together with the existing option
--memlimit-decompress=LIMIT. The old option sets a hard limit
that must not be exceeded (xz will refuse to decompress)
while the new option only restricts the number of threads.
If the limit set with --memlimit-mt-decompress is greater
than the limit set with --memlimit-compress, then the latter
value is used also for --memlimit-mt-decompress.
* Tests:
- Added a few more tests.
- Added tests/code_coverage.sh to create a code coverage report
of the tests.
* Build systems:
- Automake's parallel test harness is now used to make tests
finish faster.
- Added the CMake files to the distribution tarball. These were
supposed to be in 5.2.5 already.
- Added liblzma tests to the CMake build.
- Windows: Fix building of liblzma.dll with the included
Visual Studio project files.
5.3.2alpha (2021-10-28)
This release was made on short notice so that recent erofs-utils can
be built with LZMA support without needing a snapshot from xz.git.
Thus many pending things were not included, not even updated
translations (which would need to be updated for the new --list
strings anyway).
* All fixes from 5.2.5.
* xz:
- When copying metadata from the source file to the destination
file, don't try to set the group (GID) if it is already set
correctly. This avoids a failure on OpenBSD (and possibly on
a few other OSes) where files may get created so that their
group doesn't belong to the user, and fchown(2) can fail even
if it needs to do nothing.
- The --keep option now accepts symlinks, hardlinks, and
setuid, setgid, and sticky files. Previously this required
using --force.
- Split the long strings used in --list and --info-memory modes
to make them much easier for translators.
- If built with sandbox support and enabling the sandbox fails,
xz will now immediately exit with exit status of 1. Previously
it would only display a warning if -vv was used.
- Cap --memlimit-compress to 2000 MiB on MIPS32 because on
MIPS32 userspace processes are limited to 2 GiB of address
space.
* liblzma:
- Added lzma_microlzma_encoder() and lzma_microlzma_decoder().
The API is in lzma/container.h.
The MicroLZMA format is a raw LZMA stream (without end marker)
whose first byte (always 0x00) has been replaced with
bitwise-negation of the LZMA properties (lc/lp/pb). It was
created for use in EROFS but may be used in other contexts
as well where it is important to avoid wasting bytes for
stream headers or footers. The format is also supported by
XZ Embedded.
The MicroLZMA encoder API in liblzma can compress into a
fixed-sized output buffer so that as much data is compressed
as can be fit into the buffer while still creating a valid
MicroLZMA stream. This is needed for EROFS.
- Added fuzzing support.
- Support Intel Control-flow Enforcement Technology (CET) in
32-bit x86 assembly files.
- Visual Studio: Use non-standard _MSVC_LANG to detect C++
standard version in the lzma.h API header. It's used to
detect when "noexcept" can be used.
* Scripts:
- Fix exit status of xzdiff/xzcmp. Exit status could be 2 when
the correct value is 1.
- Fix exit status of xzgrep.
- Detect corrupt .bz2 files in xzgrep.
- Add zstd support to xzgrep and xzdiff/xzcmp.
- Fix less(1) version detection in xzless. It failed if the
version number from "less -V" contained a dot.
* Fix typos and technical issues in man pages.
* Build systems:
- Windows: Fix building of resource files when config.h isn't
used. CMake + Visual Studio can now build liblzma.dll.
- Various fixes to the CMake support. It might still need a few
more fixes even for liblzma-only builds.
5.3.1alpha (2018-04-29)
* All fixes from 5.2.4.
* Add lzma_file_info_decoder() into liblzma and use it in xz to
implement the --list feature.
* Capsicum sandbox support is enabled by default where available
(FreeBSD >= 10).
5.2.10 (2022-12-13)
* xz: Don't modify argv[] when parsing the --memlimit* and
--block-list command line options. This fixes confusing
arguments in process listing (like "ps auxf").
* GNU/Linux only: Use __has_attribute(__symver__) to detect if
that attribute is supported. This fixes build on Mandriva where
Clang is patched to define __GNUC__ to 11 by default (instead
of 4 as used by Clang upstream).
5.2.9 (2022-11-30)
* liblzma:
- Fixed an infinite loop in LZMA encoder initialization
if dict_size >= 2 GiB. (The encoder only supports up
to 1536 MiB.)
- Fixed two cases of invalid free() that can happen if
a tiny allocation fails in encoder re-initialization
or in lzma_filters_update(). These bugs had some
similarities with the bug fixed in 5.2.7.
- Fixed lzma_block_encoder() not allowing the use of
LZMA_SYNC_FLUSH with lzma_code() even though it was
documented to be supported. The sync-flush code in
the Block encoder was already used internally via
lzma_stream_encoder(), so this was just a missing flag
in the lzma_block_encoder() API function.
- GNU/Linux only: Don't put symbol versions into static
liblzma as it breaks things in some cases (and even if
it didn't break anything, symbol versions in static
libraries are useless anyway). The downside of the fix
is that if the configure options --with-pic or --without-pic
are used then it's not possible to build both shared and
static liblzma at the same time on GNU/Linux anymore;
with those options --disable-static or --disable-shared
must be used too.
* New email address for bug reports is <xz@tukaani.org> which
forwards messages to Lasse Collin and Jia Tan.
5.2.8 (2022-11-13)
* xz:
- If xz cannot remove an input file when it should, this
is now treated as a warning (exit status 2) instead of
an error (exit status 1). This matches GNU gzip and it
is more logical as at that point the output file has
already been successfully closed.
- Fix handling of .xz files with an unsupported check type.
Previously such printed a warning message but then xz
behaved as if an error had occurred (didn't decompress,
exit status 1). Now a warning is printed, decompression
is done anyway, and exit status is 2. This used to work
slightly before 5.0.0. In practice this bug matters only
if xz has been built with some check types disabled. As
instructed in PACKAGERS, such builds should be done in
special situations only.
- Fix "xz -dc --single-stream tests/files/good-0-empty.xz"
which failed with "Internal error (bug)". That is,
--single-stream was broken if the first .xz stream in
the input file didn't contain any uncompressed data.
- Fix displaying file sizes in the progress indicator when
working in passthru mode and there are multiple input files.
Just like "gzip -cdf", "xz -cdf" works like "cat" when the
input file isn't a supported compressed file format. In
this case the file size counters weren't reset between
files so with multiple input files the progress indicator
displayed an incorrect (too large) value.
* liblzma:
- API docs in lzma/container.h:
* Update the list of decoder flags in the decoder
function docs.
* Explain LZMA_CONCATENATED behavior with .lzma files
in lzma_auto_decoder() docs.
- OpenBSD: Use HW_NCPUONLINE to detect the number of
available hardware threads in lzma_physmem().
- Fix use of wrong macro to detect x86 SSE2 support.
__SSE2_MATH__ was used with GCC/Clang but the correct
one is __SSE2__. The first one means that SSE2 is used
for floating point math which is irrelevant here.
The affected SSE2 code isn't used on x86-64 so this affects
only 32-bit x86 builds that use -msse2 without -mfpmath=sse
(there is no runtime detection for SSE2). It improves LZMA
compression speed (not decompression).
- Fix the build with Intel C compiler 2021 (ICC, not ICX)
on Linux. It defines __GNUC__ to 10 but doesn't support
the __symver__ attribute introduced in GCC 10.
* Scripts: Ignore warnings from xz by using --quiet --no-warn.
This is needed if the input .xz files use an unsupported
check type.
* Translations:
- Updated Croatian and Turkish translations.
- One new translations wasn't included because it needed
technical fixes. It will be in upcoming 5.4.0. No new
translations will be added to the 5.2.x branch anymore.
- Renamed the French man page translation file from
fr_FR.po to fr.po and thus also its install directory
(like /usr/share/man/fr_FR -> .../fr).
- Man page translations for upcoming 5.4.0 are now handled
in the Translation Project.
* Update doc/faq.txt a little so it's less out-of-date.
5.2.7 (2022-09-30)
* liblzma:
- Made lzma_filters_copy() to never modify the destination
array if an error occurs. lzma_stream_encoder() and
lzma_stream_encoder_mt() already assumed this. Before this
change, if a tiny memory allocation in lzma_filters_copy()
failed it would lead to a crash (invalid free() or invalid
memory reads) in the cleanup paths of these two encoder
initialization functions.
- Added missing integer overflow check to lzma_index_append().
This affects xz --list and other applications that decode
the Index field from .xz files using lzma_index_decoder().
Normal decompression of .xz files doesn't call this code
and thus most applications using liblzma aren't affected
by this bug.
- Single-threaded .xz decoder (lzma_stream_decoder()): If
lzma_code() returns LZMA_MEMLIMIT_ERROR it is now possible
to use lzma_memlimit_set() to increase the limit and continue
decoding. This was supposed to work from the beginning
but there was a bug. With other decoders (.lzma or
threaded .xz decoder) this already worked correctly.
- Fixed accumulation of integrity check type statistics in
lzma_index_cat(). This bug made lzma_index_checks() return
only the type of the integrity check of the last Stream
when multiple lzma_indexes were concatenated. Most
applications don't use these APIs but in xz it made
xz --list not list all check types from concatenated .xz
files. In xz --list --verbose only the per-file "Check:"
lines were affected and in xz --robot --list only the "file"
line was affected.
- Added ABI compatibility with executables that were linked
against liblzma in RHEL/CentOS 7 or other liblzma builds
that had copied the problematic patch from RHEL/CentOS 7
(xz-5.2.2-compat-libs.patch). For the details, see the
comment at the top of src/liblzma/validate_map.sh.
WARNING: This uses __symver__ attribute with GCC >= 10.
In other cases the traditional __asm__(".symver ...")
is used. Using link-time optimization (LTO, -flto) with
GCC versions older than 10 can silently result in
broken liblzma.so.5 (incorrect symbol versions)! If you
want to use -flto with GCC, you must use GCC >= 10.
LTO with Clang seems to work even with the traditional
__asm__(".symver ...") method.
* xzgrep: Fixed compatibility with old shells that break if
comments inside command substitutions have apostrophes (').
This problem was introduced in 5.2.6.
* Build systems:
- New #define in config.h: HAVE_SYMBOL_VERSIONS_LINUX
- Windows: Fixed liblzma.dll build with Visual Studio project
files. It broke in 5.2.6 due to a change that was made to
improve CMake support.
- Windows: Building liblzma with UNICODE defined should now
work.
- CMake files are now actually included in the release tarball.
They should have been in 5.2.5 already.
- Minor CMake fixes and improvements.
* Added a new translation: Turkish
5.2.6 (2022-08-12)
* xz:
- The --keep option now accepts symlinks, hardlinks, and
setuid, setgid, and sticky files. Previously this required
using --force.
- When copying metadata from the source file to the destination
file, don't try to set the group (GID) if it is already set
correctly. This avoids a failure on OpenBSD (and possibly on
a few other OSes) where files may get created so that their
group doesn't belong to the user, and fchown(2) can fail even
if it needs to do nothing.
- Cap --memlimit-compress to 2000 MiB instead of 4020 MiB on
MIPS32 because on MIPS32 userspace processes are limited
to 2 GiB of address space.
* liblzma:
- Fixed a missing error-check in the threaded encoder. If a
small memory allocation fails, a .xz file with an invalid
Index field would be created. Decompressing such a file would
produce the correct output but result in an error at the end.
Thus this is a "mild" data corruption bug. Note that while
a failed memory allocation can trigger the bug, it cannot
cause invalid memory access.
- The decoder for .lzma files now supports files that have
uncompressed size stored in the header and still use the
end of payload marker (end of stream marker) at the end
of the LZMA stream. Such files are rare but, according to
the documentation in LZMA SDK, they are valid.
doc/lzma-file-format.txt was updated too.
- Improved 32-bit x86 assembly files:
* Support Intel Control-flow Enforcement Technology (CET)
* Use non-executable stack on FreeBSD.
- Visual Studio: Use non-standard _MSVC_LANG to detect C++
standard version in the lzma.h API header. It's used to
detect when "noexcept" can be used.
* xzgrep:
- Fixed arbitrary command injection via a malicious filename
(CVE-2022-1271, ZDI-CAN-16587). A standalone patch for
this was released to the public on 2022-04-07. A slight
robustness improvement has been made since then and, if
using GNU or *BSD grep, a new faster method is now used
that doesn't use the old sed-based construct at all. This
also fixes bad output with GNU grep >= 3.5 (2020-09-27)
when xzgrepping binary files.
This vulnerability was discovered by:
cleemy desu wayo working with Trend Micro Zero Day Initiative
- Fixed detection of corrupt .bz2 files.
- Improved error handling to fix exit status in some situations
and to fix handling of signals: in some situations a signal
didn't make xzgrep exit when it clearly should have. It's
possible that the signal handling still isn't quite perfect
but hopefully it's good enough.
- Documented exit statuses on the man page.
- xzegrep and xzfgrep now use "grep -E" and "grep -F" instead
of the deprecated egrep and fgrep commands.
- Fixed parsing of the options -E, -F, -G, -P, and -X. The
problem occurred when multiple options were specied in
a single argument, for example,
echo foo | xzgrep -Fe foo
treated foo as a filename because -Fe wasn't correctly
split into -F -e.
- Added zstd support.
* xzdiff/xzcmp:
- Fixed wrong exit status. Exit status could be 2 when the
correct value is 1.
- Documented on the man page that exit status of 2 is used
for decompression errors.
- Added zstd support.
* xzless:
- Fix less(1) version detection. It failed if the version number
from "less -V" contained a dot.
* Translations:
- Added new translations: Catalan, Croatian, Esperanto,
Korean, Portuguese, Romanian, Serbian, Spanish, Swedish,
and Ukrainian
- Updated the Brazilian Portuguese translation.
- Added French man page translation. This and the existing
German translation aren't complete anymore because the
English man pages got a few updates and the translators
weren't reached so that they could update their work.
* Build systems:
- Windows: Fix building of resource files when config.h isn't
used. CMake + Visual Studio can now build liblzma.dll.
- Various fixes to the CMake support. Building static or shared
liblzma should work fine in most cases. In contrast, building
the command line tools with CMake is still clearly incomplete
and experimental and should be used for testing only.
5.2.5 (2020-03-17)
* liblzma:
- Fixed several C99/C11 conformance bugs. Now the code is clean
under gcc/clang -fsanitize=undefined. Some of these changes
might have a negative effect on performance with old GCC
versions or compilers other than GCC and Clang. The configure
option --enable-unsafe-type-punning can be used to (mostly)
restore the old behavior but it shouldn't normally be used.
- Improved API documentation of lzma_properties_decode().
- Added a very minor encoder speed optimization.
* xz:
- Fixed a crash in "xz -dcfv not_an_xz_file". All four options
were required to trigger it. The crash occurred in the
progress indicator code when xz was in passthru mode where
xz works like "cat".
- Fixed an integer overflow with 32-bit off_t. It could happen
when decompressing a file that has a long run of zero bytes
which xz would try to write as a sparse file. Since the build
system enables large file support by default, off_t is
normally 64-bit even on 32-bit systems.
- Fixes for --flush-timeout:
* Fix semi-busy-waiting.
* Avoid unneeded flushes when no new input has arrived
since the previous flush was completed.
- Added a special case for 32-bit xz: If --memlimit-compress is
used to specify a limit that exceeds 4020 MiB, the limit will
be set to 4020 MiB. The values "0" and "max" aren't affected
by this and neither is decompression. This hack can be
helpful when a 32-bit xz has access to 4 GiB address space
but the specified memlimit exceeds 4 GiB. This can happen
e.g. with some scripts.
- Capsicum sandbox is now enabled by default where available
(FreeBSD >= 10). The sandbox debug messages (xz -vv) were
removed since they seemed to be more annoying than useful.
- DOS build now requires DJGPP 2.05 instead of 2.04beta.
A workaround for a locale problem with DJGPP 2.05 was added.
* xzgrep and other scripts: