Commit Graph

858 Commits

Author SHA1 Message Date
Lasse Collin 3247e95115 xzdiff: Update the man page about the exit status.
This was forgotten from 194029ffaf.
2021-06-04 19:02:38 +03:00
Lasse Collin 96f5a28a46 xzless: Fix less(1) version detection when it contains a dot.
Sometimes the version number from "less -V" contains a dot,
sometimes not. xzless failed detect the version number when
it does contain a dot. This fixes it.

Thanks to nick87720z for reporting this. Apparently it had been
reported here <https://bugs.gentoo.org/489362> in 2013.
2021-06-04 18:52:48 +03:00
Ivan A. Melnikov fc3d3a7296 Reduce maximum possible memory limit on MIPS32
Due to architectural limitations, address space available to a single
userspace process on MIPS32 is limited to 2 GiB, not 4, even on systems
that have more physical RAM -- e.g. 64-bit systems with 32-bit
userspace, or systems that use XPA (an extension similar to x86's PAE).

So, for MIPS32, we have to impose stronger memory limits. I've chosen
2000MiB to give the process some headroom.
2021-04-11 19:50:41 +03:00
Lasse Collin 6c6f0db340 liblzma: Fix unitialized variable.
This was introduced two weeks ago in the commit
625f4c7c99.

Thanks to Nathan Moinvaziri.
2021-01-29 21:19:08 +02:00
Lasse Collin 6b8abc84a5 liblzma: Fix a wrong comment in stream_encoder_mt.c. 2021-01-24 19:22:35 +02:00
Lasse Collin db465419ae liblzma: In EROFS LZMA decoder, verify that comp_size matches at the end.
When the uncompressed size is known to be exact, after decompressing
the stream exactly comp_size bytes of input must have been consumed.
This is a minor improvement to error detection.
2021-01-17 19:20:50 +02:00
Lasse Collin 774cc0118b liblzma: Make EROFS LZMA decoder work when exact uncomp_size isn't known.
The caller must still not specify an uncompressed size bigger
than the actual uncompressed size.

As a downside, this now needs the exact compressed size.
2021-01-17 18:53:34 +02:00
Lasse Collin 421b0aa352 liblzma: Fix missing normalization in rc_encode_dummy().
Without this fix it could attempt to create too much output.
2021-01-14 20:57:11 +02:00
Lasse Collin 601ec0311e liblzma: Add EROFS LZMA encoder and decoder.
Right now this is just a planned extra-compact format for use
in the EROFS file system in Linux. At this point it's possible
that the format will either change or be abandoned and removed
completely.

The special thing about the encoder is that it uses the
output-size-limited encoding added in the previous commit.
EROFS uses fixed-sized blocks (e.g. 4 KiB) to hold compressed
data so the compressors must be able to create valid streams
that fill the given block size.
2021-01-14 20:10:59 +02:00
Lasse Collin 625f4c7c99 liblzma: Add rough support for output-size-limited encoding in LZMA1.
With this it is possible to encode LZMA1 data without EOPM so that
the encoder will encode as much input as it can without exceeding
the specified output size limit. The resulting LZMA1 stream will
be a normal LZMA1 stream without EOPM. The actual uncompressed size
will be available to the caller via the uncomp_size pointer.

One missing thing is that the LZMA layer doesn't inform the LZ layer
when the encoding is finished and thus the LZ may read more input
when it won't be used. However, this doesn't matter if encoding is
done with a single call (which is the planned use case for now).
For proper multi-call encoding this should be improved.

This commit only adds the functionality for internal use.
Nothing uses it yet.
2021-01-14 18:58:13 +02:00
Lasse Collin 9cdabbeea8 Scripts: Add zstd support to xzdiff. 2021-01-11 23:57:11 +02:00
Lasse Collin 074259f4f3 xz: Make --keep accept symlinks, hardlinks, and setuid/setgid/sticky.
Previously this required using --force but that has other
effects too which might be undesirable. Changing the behavior
of --keep has a small risk of breaking existing scripts but
since this is a fairly special corner case I expect the
likehood of breakage to be low enough.

I think the new behavior is more logical. The only reason for
the old behavior was to be consistent with gzip and bzip2.

Thanks to Vincent Lefevre and Sebastian Andrzej Siewior.
2021-01-11 23:41:16 +02:00
Lasse Collin 73c555b307 Scripts: Fix exit status of xzgrep.
Omit the -q option from xz, gzip, and bzip2. With xz this shouldn't
matter. With gzip it's important because -q makes gzip replace SIGPIPE
with exit status 2. With bzip2 it's important because with -q bzip2
is completely silent if input is corrupt while other decompressors
still give an error message.

Avoiding exit status 2 from gzip is important because bzip2 uses
exit status 2 to indicate corrupt input. Before this commit xzgrep
didn't recognize corrupt .bz2 files because xzgrep was treating
exit status 2 as SIGPIPE for gzip compatibility.

zstd still needs -q because otherwise it is noisy in normal
operation.

The code to detect real SIGPIPE didn't check if the exit status
was due to a signal (>= 128) and so could ignore some other exit
status too.
2021-01-11 23:28:52 +02:00
Lasse Collin 194029ffaf Scripts: Fix exit status of xzdiff/xzcmp.
This is a minor fix since this affects only the situation when
the files differ and the exit status is something else than 0.
In such case there could be SIGPIPE from a decompression tool
and that would result in exit status of 2 from xzdiff/xzcmp
while the correct behavior would be to return 1 or whatever
else diff or cmp may have returned.

This commit omits the -q option from xz/gzip/bzip2/lzop arguments.
I'm not sure why the -q was used in the first place, perhaps it
hides warnings in some situation that I cannot see at the moment.
Hopefully the removal won't introduce a new bug.

With gzip the -q option was harmful because it made gzip return 2
instead of >= 128 with SIGPIPE. Ignoring exit status 2 (warning
from gzip) isn't practical because bzip2 uses exit status 2 to
indicate corrupt input file. It's better if SIGPIPE results in
exit status >= 128.

With bzip2 the removal of -q seems to be good because with -q
it prints nothing if input is corrupt. The other tools aren't
silent in this situation even with -q. On the other hand, if
zstd support is added, it will need -q since otherwise it's
noisy in normal situations.

Thanks to Étienne Mollier and Sebastian Andrzej Siewior.
2021-01-11 22:58:58 +02:00
Lasse Collin f7fa309e1f liblzma: Make lzma_outq usable for threaded decompression too.
Before this commit all output queue buffers were allocated as
a single big allocation. Now each buffer is allocated separately
when needed. Used buffers are cached to avoid reallocation
overhead but the cache will keep only one buffer size at a time.
This should make things work OK in the decompression where most
of the time the buffer sizes will be the same but with some less
common files the buffer sizes may vary.

While this should work fine, it's still a bit preliminary
and may even get reverted if it turns out to be useless for
decompression.
2021-01-09 22:18:23 +02:00
H.J. Lu 4fd79b90c5 liblzma: Enable Intel CET in x86 CRC assembly codes
When Intel CET is enabled, we need to include <cet.h> in assembly codes
to mark Intel CET support and add _CET_ENDBR to indirect jump targets.

Tested on Intel Tiger Lake under CET enabled Linux.
2020-12-23 17:13:33 +02:00
Adam Borowski 1890351f34 Scripts: Add zstd support to xzgrep.
Thanks to Adam Borowski.
2020-12-05 22:39:03 +02:00
Lasse Collin 4575d9d365 xz: Avoid unneeded \f escapes on the man page.
I don't want to use \c in macro arguments but groff_man(7)
suggests that \f has better portability. \f would be needed
for the .TP strings for portability reasons anyway.

Thanks to Bjarni Ingi Gislason.
2020-11-01 22:34:25 +02:00
Lasse Collin 620b32f533 xz: Use non-breaking spaces when intentionally using more than one space.
This silences some style checker warnings. Seems that spaces
in the beginning of a line don't need this treatment.

Thanks to Bjarni Ingi Gislason.
2020-11-01 19:09:53 +02:00
Lasse Collin cb1f34988c xz: Protect the ellipsis (...) on the man page with \&.
This does it only when ... appears outside macro calls.

Thanks to Bjarni Ingi Gislason.
2020-11-01 18:53:25 +02:00
Lasse Collin 5d224da3da xz: Avoid the abbreviation "e.g." on the man page.
A few are simply omitted, most are converted to "for example"
and surrounded with commas. Sounds like that this is better
style, for example, man-pages(7) recommends avoiding such
abbreviations except in parenthesis.

Thanks to Bjarni Ingi Gislason.
2020-11-01 18:44:51 +02:00
Lasse Collin 90457dbe3e xz man page: Change \- (minus) to \(en (en-dash) for a numeric range.
Docs of ancient troff/nroff mention \(em (em-dash) but not \(en
and \- was used for both minus and en-dash. I don't know how
portable \(en is nowadays but it can be changed back if someone
complains. At least GNU groff and OpenBSD's mandoc support it.

Thanks to Bjarni Ingi Gislason for the patch.
2020-07-12 23:10:03 +03:00
Lasse Collin 352ba2d69a Windows: Fix building of resource files when config.h isn't used.
Now CMake + Visual Studio works for building liblzma.dll.

Thanks to Markus Rickert.
2020-07-12 20:46:24 +03:00
Lasse Collin a9e2a87f1d src/scripts/xzgrep.1: Filenames to xzgrep are optional.
xzgrep --help was correct already.
2020-04-06 19:34:48 +03:00
Bjarni Ingi Gislason a7ba275d9b src/script/xzgrep.1: Remove superfluous '.RB'
Output is from: test-groff -b -e -mandoc -T utf8 -rF0 -t -w w -z

  [ "test-groff" is a developmental version of "groff" ]

Input file is ./src/scripts/xzgrep.1

<src/scripts/xzgrep.1>:20 (macro RB): only 1 argument, but more are expected
<src/scripts/xzgrep.1>:23 (macro RB): only 1 argument, but more are expected
<src/scripts/xzgrep.1>:26 (macro RB): only 1 argument, but more are expected
<src/scripts/xzgrep.1>:29 (macro RB): only 1 argument, but more are expected
<src/scripts/xzgrep.1>:32 (macro RB): only 1 argument, but more are expected

 "abc..." does not mean the same as "abc ...".

  The output from nroff and troff is unchanged except for the space
between "file" and "...".

Signed-off-by: Bjarni Ingi Gislason <bjarniig@rhi.hi.is>
2020-04-06 19:29:15 +03:00
Bjarni Ingi Gislason 133d498db0 xzgrep.1: Delete superfluous '.PP'
Summary:

mandoc -T lint xzgrep.1 :
mandoc: xzgrep.1:79:2: WARNING: skipping paragraph macro: PP empty

  There is no change in the output of "nroff" and "troff".

Signed-off-by: Bjarni Ingi Gislason <bjarniig@rhi.hi.is>
2020-04-06 19:08:14 +03:00
Bjarni Ingi Gislason 057839ca98 src/xz/xz.1: Correct misused two-fonts macros
Output is from: test-groff -b -e -mandoc -T utf8 -rF0 -t -w w -z

  [ "test-groff" is a developmental version of "groff" ]

Input file is ./src/xz/xz.1

<src/xz/xz.1>:408 (macro BR): only 1 argument, but more are expected
<src/xz/xz.1>:1009 (macro BR): only 1 argument, but more are expected
<src/xz/xz.1>:1743 (macro BR): only 1 argument, but more are expected
<src/xz/xz.1>:1920 (macro BR): only 1 argument, but more are expected
<src/xz/xz.1>:2213 (macro BR): only 1 argument, but more are expected

  Output from nroff and troff is unchanged, except for a font change of a
full stop (.).

Signed-off-by: Bjarni Ingi Gislason <bjarniig@rhi.hi.is>
2020-04-06 19:08:04 +03:00
Lasse Collin b8e12f5ab4 Typo fixes from fossies.org.
https://fossies.org/linux/misc/xz-5.2.5.tar.xz/codespell.html
2020-03-23 18:07:50 +02:00
Lasse Collin 7812002dd3 xz: Never use thousand separators in DJGPP builds.
DJGPP 2.05 added support for thousands separators but it's
broken at least under WinXP with Finnish locale that uses
a non-breaking space as the thousands separator. Workaround
by disabling thousands separators for DJGPP builds.
2020-03-11 21:15:35 +02:00
Lasse Collin 4572d53e16 liblzma: Fix a comment and RC_SYMBOLS_MAX.
The comment didn't match the value of RC_SYMBOLS_MAX and the value
itself was slightly larger than actually needed. The only harm
about this was that memory usage was a few bytes larger.
2020-03-02 13:54:33 +02:00
Lasse Collin b3ed19a55f liblzma: Remove unneeded <sys/types.h> from fastpos_tablegen.c.
This file only generates fastpos_table.c.
It isn't built as a part of liblzma.
2020-02-24 23:23:18 +02:00
Lasse Collin 7b8982b291 Use defined(__GNUC__) before __GNUC__ in preprocessor lines.
This should silence the equivalent of -Wundef in compilers that
don't define __GNUC__.
2020-02-22 14:15:07 +02:00
Lasse Collin 43dfe04e62 liblzma: Add more uses of lzma_memcmplen() to the normal mode of LZMA.
This gives a tiny encoder speed improvement. This could have been done
in 2014 after the commit 544aaa3d13 but
it was forgotten.
2020-02-21 17:40:02 +02:00
Lasse Collin 7fe3ef2eaa xz: Silence a warning when sig_atomic_t is long int.
It can be true at least on z/OS.
2020-02-21 16:10:44 +02:00
Lasse Collin b0a2a77d10 xz: Avoid unneeded access of a volatile variable. 2020-02-21 15:59:26 +02:00
Lasse Collin 57360bb4fd tuklib_exit: Add missing header.
strerror() needs <string.h> which happened to be included via
tuklib_common.h -> tuklib_config.h -> sysdefs.h if HAVE_CONFIG_H
was defined. This wasn't tested without config.h before so it
had worked fine.
2020-02-20 18:54:04 +02:00
Lasse Collin fddd31175e Revert the previous commit and add a comment.
The previous commit broke crc32_tablegen.c.

If the whole package is built without config.h (with defines
set on the compiler command line) this should still work fine
as long as these headers conform to C99 well enough.
2020-02-18 19:12:35 +02:00
Lasse Collin 4e4e9fbb7e Do not check for HAVE_CONFIG_H in tuklib_config.h.
In XZ Utils sysdefs.h takes care of it and the required headers.
2020-02-17 23:37:20 +02:00
Lasse Collin 2d4cef954f sysdefs.h: Omit the conditionals around string.h and limits.h.
string.h is used unconditionally elsewhere in the project and
configure has always stopped if limits.h is missing, so these
headers must have been always available even on the weirdest
systems.
2020-02-16 12:24:13 +02:00
Lasse Collin 6f7211b6bb Build: Add support for translated man pages using po4a.
The dependency on po4a is optional. It's never required to install
the translated man pages when xz is built from a release tarball.
If po4a is missing when building from xz.git, the translated man
pages won't be generated but otherwise the build will work normally.

The translations are only updated automatically by autogen.sh and
by "make mydist". This makes it easy to keep po4a as an optional
dependency and ensures that I won't forget to put updated
translations to a release tarball.

The translated man pages aren't installed if --disable-nls is used.

The installation of translated man pages abuses Automake internals
by calling "install-man" with redefined dist_man_MANS and man_MANS.
This makes the hairy script code slightly less hairy. If it breaks
some day, this code needs to be fixed; don't blame Automake developers.

Also, this adds more quotes to the existing shell script code in
the Makefile.am "-hook"s.
2020-02-07 15:32:21 +02:00
Lasse Collin 15a133b6d1 xz: Make it a fatal error if enabling the sandbox fails.
Perhaps it's too drastic but on the other hand it will let me
learn about possible problems if people report the errors.
This won't be backported to the v5.2 branch.
2020-02-05 20:40:14 +02:00
Lasse Collin af0fb386ef xz: Comment out annoying sandboxing messages. 2020-02-05 20:33:50 +02:00
Lasse Collin 3539705108 xz: Limit --memlimit-compress to at most 4020 MiB for 32-bit xz.
See the code comment for reasoning. It's far from perfect but
hopefully good enough for certain cases while hopefully doing
nothing bad in other situations.

At presets -5 ... -9, 4020 MiB vs. 4096 MiB makes no difference
on how xz scales down the number of threads.

The limit has to be a few MiB below 4096 MiB because otherwise
things like "xz --lzma2=dict=500MiB" won't scale down the dict
size enough and xz cannot allocate enough memory. With
"ulimit -v $((4096 * 1024))" on x86-64, the limit in xz had
to be no more than 4085 MiB. Some safety margin is good though.

This is hack but it should be useful when running 32-bit xz on
a 64-bit kernel that gives full 4 GiB address space to xz.
Hopefully this is enough to solve this:

https://bugzilla.redhat.com/show_bug.cgi?id=1196786

FreeBSD has a patch that limits the result in tuklib_physmem()
to SIZE_MAX on 32-bit systems. While I think it's not the way
to do it, the results on --memlimit-compress have been good. This
commit should achieve practically identical results for compression
while leaving decompression and tuklib_physmem() and thus
lzma_physmem() unaffected.
2020-02-01 19:56:18 +02:00
Lasse Collin ba76d67585 xz: Set the --flush-timeout deadline when the first input byte arrives.
xz --flush-timeout=2000, old version:

  1. xz is started. The next flush will happen after two seconds.
  2. No input for one second.
  3. A burst of a few kilobytes of input.
  4. No input for one second.
  5. Two seconds have passed and flushing starts.

The first second counted towards the flush-timeout even though
there was no pending data. This can cause flushing to occur more
often than needed.

xz --flush-timeout=2000, after this commit:

  1. xz is started.
  2. No input for one second.
  3. A burst of a few kilobytes of input. The next flush will
     happen after two seconds counted from the time when the
     first bytes of the burst were read.
  4. No input for one second.
  5. No input for another second.
  6. Two seconds have passed and flushing starts.
2020-01-26 20:53:25 +02:00
Lasse Collin fd47fd62bb xz: Move flush_needed from mytime.h to file_pair struct in file_io.h. 2020-01-26 20:25:52 +02:00
Lasse Collin 8150356810 xz: coder.c: Make writing output a separate function.
The same code sequence repeats so it's nicer as a separate function.
Note that in one case there was no test for opt_mode != MODE_TEST,
but that was only because that condition would always be true, so
this commit doesn't change the behavior there.
2020-01-26 14:49:22 +02:00
Lasse Collin 5a49e081a0 xz: Fix semi-busy-waiting in xz --flush-timeout.
When input blocked, xz --flush-timeout=1 would wake up every
millisecond and initiate flushing which would have nothing to
flush and thus would just waste CPU time. The fix disables the
timeout when no input has been seen since the previous flush.
2020-01-26 14:13:42 +02:00
Lasse Collin dcca70fe9f xz: Refactor io_read() a bit. 2020-01-26 13:47:31 +02:00
Lasse Collin 4ae9ab70cd xz: Update a comment in file_io.h. 2020-01-26 13:37:08 +02:00
Lasse Collin 3333ba4a67 xz: Move the setting of flush_needed in file_io.c to a nicer location. 2020-01-26 13:27:51 +02:00
Lasse Collin 7136f1735c Rename unaligned_read32ne to read32ne, and similarly for the others. 2019-12-31 00:47:49 +02:00
Lasse Collin 5e78fcbf2e Rename read32ne to aligned_read32ne, and similarly for the others.
Using the aligned methods requires more care to ensure that
the address really is aligned, so it's nicer if the aligned
methods are prefixed. The next commit will remove the unaligned_
prefix from the unaligned methods which in liblzma are used in
more places than the aligned ones.
2019-12-31 00:29:48 +02:00
Lasse Collin 77bc5bc6dd Revise tuklib_integer.h and .m4.
Add a configure option --enable-unsafe-type-punning to get the
old non-conforming memory access methods. It can be useful with
old compilers or in some other less typical situations but
shouldn't normally be used.

Omit the packed struct trick for unaligned access. While it's
best in some cases, this is simpler. If the memcpy trick doesn't
work, one can request unsafe type punning from configure.

Because CRC32/CRC64 code needs fast aligned reads, if no very
safe way to do it is found, type punning is used as a fallback.
This sucks but since it currently works in practice, it seems to
be the least bad option. It's never needed with GCC >= 4.7 or
Clang >= 3.6 since these support __builtin_assume_aligned and
thus fast aligned access can be done with the memcpy trick.

Other things:
  - Support GCC/Clang __builtin_bswapXX
  - Cleaner bswap fallback macros
  - Minor cleanups
2019-12-31 00:18:24 +02:00
Lasse Collin 43ce4ea7c7 Scripts: Put /usr/xpg4/bin to the beginning of PATH on Solaris.
This adds a configure option --enable-path-for-scripts=PREFIX
which defaults to empty except on Solaris it is /usr/xpg4/bin
to make POSIX grep and others available. The Solaris case had
been documented in INSTALL with a manual fix but it's better
to do this automatically since it is needed on most Solaris
systems anyway.

Thanks to Daniel Richard G.
2019-09-24 23:02:40 +03:00
Lasse Collin 6a89e656eb Fix comment typos in tuklib_mbstr* files. 2019-07-12 18:57:43 +03:00
Lasse Collin ac0b421265 Add missing include to tuklib_mbstr_width.c.
It didn't matter in XZ Utils because sysdefs.h
includes string.h anyway.
2019-07-12 18:30:46 +03:00
Lasse Collin 72a443281f Update tuklib base headers to include stdbool.h. 2019-07-12 18:10:57 +03:00
Lasse Collin de1f47b2b4 xz: Automatically align the strings in --info-memory.
This makes it easier to translate the strings.

Also, the string for amount of RAM was shortened.
2019-06-28 00:54:31 +03:00
Lasse Collin 8ce679125d liblzma: Fix a buggy comment. 2019-06-25 23:15:21 +03:00
Lasse Collin d499e467d9 liblzma: Add a comment. 2019-06-24 23:52:17 +03:00
Lasse Collin a12b13c5f0 liblzma: Silence clang -Wmissing-variable-declarations. 2019-06-24 23:45:21 +03:00
Lasse Collin 1b4675cebf Add LZMA_RET_INTERNAL1..8 to lzma_ret and use one for LZMA_TIMED_OUT.
LZMA_TIMED_OUT is *internally* used as a value for lzma_ret
enumeration. Previously it was #defined to 32 and cast to lzma_ret.
That way it wasn't visible in the public API, but this was hackish.

Now the public API has eight LZMA_RET_INTERNALx members and
LZMA_TIMED_OUT is #defined to LZMA_RET_INTERNAL1. This way
the code is cleaner overall although the public API has a few
extra mysterious enum members.
2019-06-24 23:25:41 +03:00
Lasse Collin 159c43875e xz: Silence a warning from clang -Wsign-conversion in main.c. 2019-06-24 22:57:43 +03:00
Lasse Collin 466cfcd3e5 xz: Make "headings" static in list.c.
Caught by clang -Wmissing-variable-declarations.
2019-06-24 22:52:20 +03:00
Lasse Collin 608517b9b7 liblzma: Remove incorrect uses of lzma_attribute((__unused__)).
Caught by clang -Wused-but-marked-unused.
2019-06-24 22:50:36 +03:00
Lasse Collin 2402f7873d xz: Fix an integer overflow with 32-bit off_t.
Or any off_t which isn't very big (like signed 64 bit integer
that most system have). A small off_t could overflow if the
file being decompressed had long enough run of zero bytes,
which would result in corrupt output.
2019-06-24 20:45:49 +03:00
Lasse Collin 4fd3a8dd0b xz: Cleanup io_seek_src() a bit.
lseek() returns -1 on error and checking for -1 is nicer.
2019-06-24 01:24:17 +03:00
Lasse Collin 1d4a904d8f xz: Change io_seek_src and io_pread arguments from off_t to uint64_t.
This helps fixing warnings from -Wsign-conversion and makes the
code look better too.
2019-06-24 00:40:45 +03:00
Lasse Collin 50120deb01 xz: list.c: Fix some warnings from -Wsign-conversion. 2019-06-24 00:12:38 +03:00
Lasse Collin d0a78751eb tuklib_mbstr_width: Fix a warning from -Wsign-conversion. 2019-06-23 23:22:45 +03:00
Lasse Collin 7883d73530 xz: Fix some of the warnings from -Wsign-conversion. 2019-06-23 23:19:34 +03:00
Lasse Collin c2b994fe3d tuklib_cpucores: Silence warnings from -Wsign-conversion. 2019-06-23 22:27:45 +03:00
Lasse Collin 07c4fa9e1a xzdec: Fix warnings from -Wsign-conversion. 2019-06-23 21:40:47 +03:00
Lasse Collin dfac2c9a1d liblzma: Fix warnings from -Wsign-conversion.
Also, more parentheses were added to the literal_subcoder
macro in lzma_comon.h (better style but no functional change
in the current usage).
2019-06-23 21:38:56 +03:00
Lasse Collin 41838dcc26 tuklib_integer: Silence warnings from -Wsign-conversion. 2019-06-23 19:33:55 +03:00
Lasse Collin 3ce05d235f tuklib_integer: Fix usage of conv macros.
Use a temporary variable instead of e.g.
conv32le(unaligned_read32ne(buf)) because the macro can
evaluate its argument multiple times.
2019-06-20 19:40:30 +03:00
Lasse Collin 039a168e8c liblzma: Fix comments.
Thanks to Bruce Stark.
2019-06-03 20:41:54 +03:00
Lasse Collin c460f6defe liblzma: Fix one more unaligned read to use unaligned_read16ne(). 2019-06-02 00:50:59 +03:00
Lasse Collin 386394fc9f liblzma: memcmplen: Use ctz32() from tuklib_integer.h.
The same compiler-specific #ifdefs are already in tuklib_integer.h
2019-06-01 21:36:13 +03:00
Lasse Collin 264ab971ce tuklib_integer: Cleanup MSVC-specific code. 2019-06-01 21:30:03 +03:00
Lasse Collin 33773c6f2a liblzma: Use unaligned_readXXne functions instead of type punning.
Now gcc -fsanitize=undefined should be clean.

Thanks to Jeffrey Walton.
2019-06-01 19:01:21 +03:00
Lasse Collin 3bc112c2d3 tuklib_integer: Improve unaligned memory access.
Now memcpy() or GNU C packed structs for unaligned access instead
of type punning. See the comment in this commit for details.

Avoiding type punning with unaligned access is needed to
silence gcc -fsanitize=undefined.

New functions: unaliged_readXXne and unaligned_writeXXne where
XX is 16, 32, or 64.
2019-06-01 18:41:16 +03:00
Lasse Collin 2a22de439e liblzma: Avoid memcpy(NULL, foo, 0) because it is undefined behavior.
I should have always known this but I didn't. Here is an example
as a reminder to myself:

    int mycopy(void *dest, void *src, size_t n)
    {
        memcpy(dest, src, n);
        return dest == NULL;
    }

In the example, a compiler may assume that dest != NULL because
passing NULL to memcpy() would be undefined behavior. Testing
with GCC 8.2.1, mycopy(NULL, NULL, 0) returns 1 with -O0 and -O1.
With -O2 the return value is 0 because the compiler infers that
dest cannot be NULL because it was already used with memcpy()
and thus the test for NULL gets optimized out.

In liblzma, if a null-pointer was passed to memcpy(), there were
no checks for NULL *after* the memcpy() call, so I cautiously
suspect that it shouldn't have caused bad behavior in practice,
but it's hard to be sure, and the problematic cases had to be
fixed anyway.

Thanks to Jeffrey Walton.
2019-05-13 20:05:17 +03:00
Lasse Collin 4adb8288ab xz: Update xz man page date. 2019-05-11 20:54:12 +03:00
Antoine Cœur 2fb0ddaa55 spelling 2019-05-11 20:52:37 +03:00
Lasse Collin 4ed3396061 xz: In xz -lvv look at the widths of the check names too.
Now the widths of the check names is used to adjust the width
of the Check column. This way there no longer is a need to restrict
the widths of the check names to be at most ten terminal-columns.
2019-05-01 18:43:10 +03:00
Lasse Collin 2f4281a100 xz: Fix xz -lvv column alignment to look at the translated strings. 2019-05-01 18:33:25 +03:00
Lasse Collin a750c35a7d xz: Automatically align column headings in xz -lvv. 2019-03-04 21:20:39 +02:00
Lasse Collin 6cb42e8aa1 xz: Automatically align strings ending in a colon in --list output.
This should avoid alignment errors in translations with these
strings.
2019-03-04 21:16:59 +02:00
Lasse Collin b55d79461d xz: Fix a crash in progress indicator when in passthru mode.
"xz -dcfv not_an_xz_file" crashed (all four options are
required to trigger it). It caused xz to call
lzma_get_progress(&strm, ...) when no coder was initialized
in strm. In this situation strm.internal is NULL which leads
to a crash in lzma_get_progress().

The bug was introduced when xz started using lzma_get_progress()
to get progress info for multi-threaded compression, so the
bug is present in versions 5.1.3alpha and higher.

Thanks to Filip Palian <Filip.Palian@pjwstk.edu.pl> for
the bug report.
2018-12-20 20:39:20 +02:00
Lasse Collin 4ae5526de0 xz: Update man page timestamp. 2018-11-22 17:20:31 +02:00
Pavel Raiskup 6a36d0d5f4 'have have' typos 2018-11-22 17:19:09 +02:00
Lasse Collin a18ae42a79 liblzma: Don't verify header CRC32s if building for fuzz testing.
FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION is #defined when liblzma
is being built for fuzz testing.

Most fuzzed inputs would normally get rejected because of incorrect
CRC32 and the actual header decoding code wouldn't get fuzzed.
Disabling CRC32 checks avoids this problem. The fuzzer program
must still use LZMA_IGNORE_CHECK flag to disable verification of
integrity checks of uncompressed data.
2018-10-26 22:49:10 +03:00
Lasse Collin f76f7516d6 xzless: Rename unused variables to silence static analysers.
In this particular case I don't see this affecting readability
of the code.

Thanks to Pavel Raiskup.
2018-07-27 18:10:44 +03:00
Lasse Collin 3cbcaeb07e liblzma: Remove an always-true condition from lzma_index_cat().
This should help static analysis tools to see that newg
isn't leaked.

Thanks to Pavel Raiskup.
2018-07-27 16:02:58 +03:00
Lasse Collin 76762ae609 liblzma: Improve lzma_properties_decode() API documentation. 2018-05-19 21:23:25 +03:00
Lasse Collin 2267f5b0d2 Bump the version number to 5.3.1alpha. 2018-04-29 18:58:19 +03:00
Ben Boeckel bc19799169 nothrow: use noexcept for C++11 and newer
In C++11, the `throw()` specifier is deprecated and `noexcept` is
preffered instead.
2018-02-06 18:41:45 +02:00
Lasse Collin fb6d4f83cb liblzma: Remove incorrect #ifdef from range_common.h.
In most cases it was harmless but it could affect some
custom build systems.

Thanks to Pippijn van Steenhoven.
2018-02-06 18:02:48 +02:00
Lasse Collin 713bbc1a80 tuklib_integer: New Intel C compiler needs immintrin.h.
Thanks to Melanie Blower (Intel) for the patch.
2018-01-10 21:54:27 +02:00