[Lzip-bug] Lziprecover 1.21-pre1 released

[Antonio Diaz Diaz]

Lziprecover 1.21-pre1 is ready for testing here
http://download.savannah.gnu.org/releases/lzip/lziprecover/lziprecover-1.21-pre1.tar.lz
http://download.savannah.gnu.org/releases/lzip/lziprecover/lziprecover-1.21-pre1.tar.gz

The sha256sums are:
4f1cd2dce3852162aff65a25c038b1db6f2fd2f4b320e8e04c3ce9537a09cf6b 
lziprecover-1.21-pre1.tar.lz
f59bd77af9e6bb4c6f594125d869946ac45b0a72a8b2cdee9777256e8dc79e01 
lziprecover-1.21-pre1.tar.gz

Please, test it and report any bugs you find.

Lziprecover is a data recovery tool and decompressor for files in the 
lzip compressed data format (.lz). Lziprecover is able to repair 
slightly damaged files, produce a correct file by merging the good parts 
of two or more damaged copies, extract data from damaged files, 
decompress files and test integrity of files.

Lziprecover can remove the damaged members from multimember files, for 
example multimember tar.lz archives.

Lziprecover provides random access to the data in multimember files; it 
only decompresses the members containing the desired data.

Lziprecover facilitates the management of metadata stored as trailing 
data in lzip files.

Lziprecover is not a replacement for regular backups, but a last line of 
defense for the case where the backups are also damaged.

Lziprecover is able to recover or decompress files produced by any of 
the compressors in the lzip family; lzip, plzip, minilzip/lzlib, clzip 
and pdlzip.

The lzip file format is designed for data sharing and long-term 
archiving, taking into account both data integrity and decoder availability.

A nice feature of the lzip format is that a corrupt byte is easier to 
repair the nearer it is from the beginning of the file. Therefore, with 
the help of lziprecover, losing an entire archive just because of a 
corrupt byte near the beginning is a thing of the past.

If the cause of file corruption is damaged media, the combination GNU 
ddrescue[1] + lziprecover is the best option for recovering data from 
multiple damaged copies.

The homepage is at http://www.nongnu.org/lzip/lziprecover.html


Changes in this version:

  * The options '--dump-damaged', '--remove-damaged', and 
'--strip-damaged' have been added, mainly as support for the new tarlz 
archive format: http://www.nongnu.org/lzip/tarlz.html

  '--dump-damaged' dumps the damaged members (if any) of one or more
  regular multimember files to standard output.

  '--remove-damaged' removes the damaged members from regular
  multimember files in place. Can be used along with '--remove-tdata'.

  '--strip-damaged' copies one or more regular multimember files to
  standard output, stripping the damaged members (if any) from each
  file. Can be used along with '--strip-tdata'.

  * Detection of forbidden combinations of characters in trailing data 
has been improved.

  * '--split' can now detect trailing data and gaps between members, 
and save each gap in its own file. Trailing data (if any) are saved 
alone in the last file. (Gaps may contain garbage or may be members with 
corrupt headers or trailers).

  * '--ignore-errors' now makes '--range-decompress' ignore a truncated 
last member.

  * '--ignore-errors' now makes '--dump-tdata', '--remove-tdata' and 
'--strip-tdata' ignore format errors.


[1] http://www.gnu.org/software/ddrescue/ddrescue.html


Regards,
Antonio Diaz, lziprecover 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 
http://www.nongnu.org/lzip/xz_inadequate.html