NAME

       pdlzip - reduces the size of files

SYNOPSIS

       pdlzip [options] [files]

DESCRIPTION

       Pdlzip is a permissively licensed implementation of the lzip data compressor, intended for
       those who can't distribute (or even use) GPL licensed Free Software. The  name  of  pdlzip
       comes  from  'public domain lzip'.  Pdlzip is written in C and is compatible with lzip 1.4
       or newer.

       Lzip is a lossless data compressor with a user interface similar to the  one  of  gzip  or
       bzip2.  Lzip  uses  a  simplified  form  of the 'Lempel-Ziv-Markov chain-Algorithm' (LZMA)
       stream format to maximize interoperability. The maximum dictionary size is 512 MiB so that
       any  lzip  file  can be decompressed on 32-bit machines. Lzip provides accurate and robust
       3-factor integrity checking. Lzip can compress about as fast as gzip (lzip -0) or compress
       most files more than bzip2 (lzip -9). Decompression speed is intermediate between gzip and
       bzip2. Lzip is better than gzip and bzip2 from a data recovery perspective. Lzip has  been
       designed,  written,  and  tested with great care to replace gzip and bzip2 as the standard
       general-purpose compressed format for Unix-like systems.

       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.

OPTIONS

       -h, --help
              display this help and exit

       -V, --version
              output version information and exit

       -a, --trailing-error
              exit with error status if trailing data

       -c, --stdout
              write to standard output, keep input files

       -d, --decompress
              decompress, test compressed file integrity

       -f, --force
              overwrite existing output files

       -F, --recompress
              force re-compression of compressed files

       -k, --keep
              keep (don't delete) input files

       -m, --match-length=<bytes>
              set match length limit in bytes [36]

       -o, --output=<file>
              write to <file>, keep input files

       -q, --quiet
              suppress all messages

       -s, --dictionary-size=<bytes>
              set dictionary size limit in bytes [8 MiB]

       -t, --test
              test compressed file integrity

       -v, --verbose
              be verbose (a 2nd -v gives more)

       -0 .. -9
              set compression level [default 6]

       --fast alias for -0

       --best alias for -9

       --loose-trailing
              allow trailing data seeming corrupt header

       If  no  file  names are given, or if a file is '-', pdlzip compresses or decompresses from
       standard input to standard output.  Numbers may be followed by a multiplier: k = kB = 10^3
       =  1000,  Ki  =  KiB  =  2^10  =  1024,  M  = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...
       Dictionary sizes 12 to 27 are interpreted as powers of two, meaning 2^12 to 2^27 bytes.

       The bidimensional parameter space of LZMA can't be mapped to a linear  scale  optimal  for
       all  files. If your files are large, very repetitive, etc, you may need to use the options
       --dictionary-size and --match-length directly to achieve optimal performance. For example,
       -9m64 usually compresses executables more (and faster) than -9.

       To  extract all the files from archive 'foo.tar.lz', use the commands 'tar -xf foo.tar.lz'
       or 'pdlzip -cd foo.tar.lz | tar -xf -'.

       Exit status: 0 for a normal exit, 1 for environmental problems (file  not  found,  invalid
       command-line  options,  I/O errors, etc), 2 to indicate a corrupt or invalid input file, 3
       for an internal consistency error (e.g., bug) which caused pdlzip to panic.

       Pdlzip includes public domain compression/decompression code from the LZMA  SDK  (Software
       Development Kit) written by Igor Pavlov.

REPORTING BUGS

       Report bugs to lzip-bug@nongnu.org
       Pdlzip home page: http://www.nongnu.org/lzip/pdlzip.html

COPYRIGHT

       Copyright  ©  2024  Antonio  Diaz Diaz.  Public Domain 2009 Igor Pavlov.  License 2-clause
       BSD.
       This is free software: you are free to change and redistribute it.  There is NO  WARRANTY,
       to the extent permitted by law.