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Update documentation.

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Con Kolivas 2011-02-21 00:02:14 +11:00
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26
ChangeLog
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lrzip ChangeLog
FEBRUARY 2011, version 0.560 Con Kolivas
* Rewrote the locking implementation to use pthread_mutexes instead of
semaphores. This makes multi-threading work on OSX.
* Re-use a single malloc in unzip_match instead of multiple malloc/frees.
* Imported the md5 code from coreutils and modified them to be used by lrzip.
* Implemented md5 hash checking on compression and decompression by using
buffers to pass to the existing crc checking and re-using them for the md5
checking.
* Sped up the hash checking on compression by not reading the whole chunk at
once to do the hash check, and instead read one paged size chunk.
* Store the md5 hash value at the end of the archive, maintaining backward
compatibility with existing 0.5 versions of lrzip, and place a flag in the
header denoting its existence.
* Use the header flag for md5's existence to determine what hash check to
perform on decompression.
* Add hash value display to maximum verbose output and in information mode.
* Add -H option to enable hash value displaying without verbose mode.
* Display what hash checking will be used on decompression in verbose mode and
in information displayed with -i.
* Add -c option to perform a hash check on the file generated on decompression,
comparing it to that stored in the lrzip archive, or that generated on
decompression on archives that do not have it stored.
* Delete broken or damaged files generated on interruption or when they fail
integrity testing by default.
* Implement the -k option to keep broken or damaged files.
FEBRUARY 2011, version 0.552 Con Kolivas
* Fix incompressible blocks causing failure with bzip2 and gzip.
* Freebsd doesn't do mremap, use the fake one.

19
WHATS-NEW
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lrzip-0.560
Implemented OSX multi-threading by converting all semaphores to pthread_mutexes.
Converted the integrity checking to also use md5 hash checking. As a bonus it
is still backwardly compatible by still storing the crc value, and yet is
faster on large files than the old one. On decompression it detects whether
the md5 value has been stored and chooses what integrity checking to use.
Implemented the -H feature which shows the md5 hash value on compression and
decompression. It is also shown in max verbose mode.
Added information about what integrity testing will be used in verbose mode,
and with the -i option.
Added the -c option which will perform a hash check on the file generated on
disk on decompression, comparing it to that from the archive to validate the
decompressed file.
Modified lrzip to delete broken or damaged files when lrzip is interrupted or
the file generated fails an integrity test.
Added the -k keep option to keep broken or damaged files.
Case reports of corruption have been confirmed to NOT BE DUE TO LRZIP.
lrzip-0.552
Fixed a potential silent corruption bug on decompression.