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.

       Lzip  is  a  lossless  data compressor with a user interface similar to the one of gzip or
       bzip2. Lzip uses a simplified form of LZMA (Lempel-Ziv-Markov chain-Algorithm) designed to
       achieve  complete interoperability between implementations. 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 -0' compresses about as fast as
       gzip, while 'lzip -9' compresses most  files  more  than  bzip2.  Decompression  speed  is
       intermediate  between gzip and bzip2. Lzip provides better data recovery capabilities than
       gzip and bzip2. Lzip has been designed, written, and tested with  great  care  to  replace
       gzip and bzip2 as 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.