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[Lzip-bug] Pdlzip 1.9 released
Antonio Diaz Diaz
[Lzip-bug] Pdlzip 1.9 released
Tue, 06 Feb 2018 18:41:37 +0100
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I am pleased to announce the release of pdlzip 1.9.
Pdlzip is a lossless data compressor with a user interface similar to
the one of lzip, bzip2 or gzip.
Pdlzip uses the lzip file format; the files produced by pdlzip are
(hope)fully compatible with lzip-1.4 or newer.
The lzip file format is designed for data sharing and long-term
archiving, taking into account both data integrity and decoder availability.
Pdlzip is also able to decompress legacy lzma-alone (.lzma) files.
Lzma-alone is a very bad format; it is essentially a raw LZMA stream. If
you keep any lzma-alone files, it is advisable to recompress them to
lzip format. Lziprecover can convert some lzma-alone files to lzip
format without recompressing.
Pdlzip includes public domain (de)compression code from the LZMA SDK
(Software Development Kit) written by Igor Pavlov. Pdlzip is in fact a
permissively licensed implementation of the lzip data compressor,
intended for those who can't distribute (or even use) GPL licensed Free
The homepage is at http://www.nongnu.org/lzip/pdlzip.html
The sources can be downloaded from
The sha256sums are:
This release is also GPG signed. You can download the signature by
appending '.sig' to the URL. If the 'gpg --verify' command fails because
you don't have the required public key, then run this command to import it:
gpg --keyserver keys.gnupg.net --recv-keys 8FE99503132D7742
Key fingerprint = 1D41 C14B 272A 2219 A739 FA4F 8FE9 9503 132D 7742
Changes in version 1.9:
* The option '--loose-trailing', has been added.
* The test used by pdlzip to discriminate trailing data from a
corrupt header in multimember or concatenated files has been improved to
a Hamming distance (HD) of 3, and the 3 bit flips must happen in
different magic bytes for the test to fail. As a consequence some kinds
of files no longer can be appended to a lzip file as trailing data
unless the '--loose-trailing' option is used when decompressing.
Lziprecover can be used to remove conflicting trailing data from a file.
* The 'bits/byte' ratio has been replaced with the inverse
compression ratio in the output.
* A final diagnostic is now shown at verbosity level 1 (-v) or higher
if any file fails the test when testing multiple files.
* A second '.lz' extension is no longer added to the argument of '-o'
if it already ends in '.lz' or '.tlz'.
* In case of (de)compressed size mismatch, the stored size is now
also shown in hexadecimal to ease visual comparison.
* The dictionary size is now shown at verbosity level 4 (-vvvv) when
decompressing or testing.
Please send bug reports and suggestions to address@hidden
Antonio Diaz, pdlzip co-author and maintainer.
If you are distributing software in xz format, please consider using
lzip instead. See http://www.nongnu.org/lzip/lzip_benchmark.html#xz1 and
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