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Description
Lunzip is a decompressor for lzip files. It is written in C and its
small size makes it well suited for embedded devices or software
installers that need to decompress files but do not need compression
capabilities.
Lunzip uses the same well-defined exit status values used by lzip and
bzip2, which makes it safer when used in pipes or scripts than
decompressors returning ambiguous warning values, like gunzip.
The 4 factor integrity checking of the lzip format guarantees that the
decompressed version of the data is identical to the original. This
guards against corruption of the compressed data, and against undetected
bugs in lunzip (hopefully very unlikely). The chances of data corruption
going undetected are microscopic. Be aware, though, that the check
occurs upon decompression, so it can only tell you that something is
wrong. It can't help you recover the original uncompressed data.
If you ever need to recover data from a damaged lzip file, try the
lziprecover program. Lziprecover makes lzip files resistant to bit-flip,
one of the most common forms of data corruption, and its recovery
capabilities contribute to make of the lzip format one of the best
options for long-term data archiving.
Lunzip replaces every file given in the command line with a decompressed
version of itself. Each decompressed file has the same modification
date, permissions, and, when possible, ownership as the corresponding
compressed file. Lunzip is able to read from some types of non regular
files if the "--stdout" option is specified.
Lunzip attempts to guess the name for the decompressed file from that of
the compressed file as follows:
filename.lz becomes filename
filename.tlz becomes filename.tar
anyothername becomes anyothername.out
If no file names are specified, lunzip decompresses from standard input
to standard output. In this case, lunzip will decline to read compressed
input from a terminal.
Lunzip will correctly decompress a file which is the concatenation of
two or more compressed files. The result is the concatenation of the
corresponding uncompressed files. Integrity testing of concatenated
compressed files is also supported.
The amount of memory required by lunzip to decompress a file is only a
few tens of KiB larger than the dictionary size used to compress that
file.
Copyright (C) 2010, 2011, 2012, 2013 Antonio Diaz Diaz.
This file is free documentation: you have unlimited permission to copy,
distribute and modify it.
The file Makefile.in is a data file used by configure to produce the
Makefile. It has the same copyright owner and permissions that configure
itself.
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