XZ Utils 5.1.1alpha is available at <http://tukaani.org/xz/>. Here is an
extract from the NEWS file:
* All fixes from 5.0.2
* liblzma fixes that will also be included in 5.0.3:
- A memory leak was fixed.
- lzma_stream_buffer_encode() no longer creates an empty .xz
Block if encoding an empty buffer. Such an empty Block with
LZMA2 data would trigger a bug in 5.0.1 and older (see the
first bullet point in 5.0.2 notes). When releasing 5.0.2,
I thought that no encoder creates this kind of files but
I was wrong.
- Validate function arguments better in a few functions. Most
importantly, specifying an unsupported integrity check to
lzma_stream_buffer_encode() no longer creates a corrupt .xz
file. Probably no application tries to do that, so this
shouldn't be a big problem in practice.
- Document that lzma_block_buffer_encode(),
lzma_easy_buffer_encode(), lzma_stream_encoder(), and
lzma_stream_buffer_encode() may return LZMA_UNSUPPORTED_CHECK.
- The return values of the _memusage() functions are now
documented better.
* Support for multithreaded compression was added using the simplest
method, which splits the input data into blocks and compresses
them independently. Other methods will be added in the future.
The current method has room for improvement, e.g. it is possible
to reduce the memory usage.
* Added the options --single-stream and --block-size=SIZE to xz.
* xzdiff and xzgrep now support .lzo files if lzop is installed.
The .tzo suffix is also recognized as a shorthand for .tar.lzo.
* Support for short 8.3 filenames under DOS was added to xz. It is
experimental and may change before it gets into a stable release.
--
Lasse Collin | IRC: Larhzu @ IRCnet & Freenode
