lhasa(1)

NAME

   lha - compression tool for .lzh archive files.

SYNOPSIS

   lha [-]{lvtxe[q{num}][finv]}[w=<dir>] archive_file [file...]

DESCRIPTION

   lha  is  a  tool  for  extracting  .lzh archive files. It also supports
   variants of the .lzh archive, such as .lzs and .pma.

   This version of the lha tool is part of Lhasa, a free implementation of
   the .lzh format.

COMMAND SYNTAX

   The lha tool has an unusual command syntax, compared to most other Unix
   commands. The first parameter to the program specifies the  command  to
   perform  and all additional options. The second parameter specifies the
   path to the archive file to operate on. Following this  is  a  list  of
   wildcard patterns to match against the filenames of the archived files.

   The  first  character of the command parameter specifies the command to
   perform, which is one of the following:

   -l     List contents of the specified archive.

   -v     Verbosely list contents of the specified archive.

   -t     Test the integrity of  the  specified  archive:  decompress  its
          contents and check the CRC.

   -e or -x
          Extract  archive.  Files  are  extracted  to the current working
          directory unless the 'w' option is specified.

OPTIONS

   The remainder of the command parameter is used  to  specify  additional
   options:

   q[012] Quiet  mode.  Higher  numbers  suppress  more output. Level 0 is
          normal operation. If no number is  specified,  full  suppression
          (level  2)  is  used.  The  quiet option also turns on the force
          overwrite option ('f').

   f      Force overwrite of existing files: do not prompt.

   i      Ignore paths of archived files: extract all  archived  files  to
          the same directory, ignoring subdirectories.

   n      Do not perform any actual operations: instead, perform a dry run
          of the requested operation and describe  what  would  have  been
          done on standard output.

   v      Verbose mode: causes extra information to be written to standard
          output.

   w=dir  Specify destination directory for extracting files. This must be
          the last option of the first parameter.

SEE ALSO

   unzip(1), tar(1), gzip(1), bzip2(1)

HISTORY

   The  .lzh  format  originated with Kazuhiko Miki's MS-DOS archive tool,
   LArc, using the LZSS algorithm developed by Haruhiko Okumura,  and  the
   .lzs  filename extension. The container format was reused for LHarc, by
   Haruyasu Yoshizaki (Yoshi), which used a new algorithm named LZHUF  and
   the  .lzh  extension.  In  later versions, LHarc was renamed to LHA and
   extended with more effective compression algorithms.

   Versions of the  LHA  tool  were  later  ported  to  various  different
   operating systems, including the Amiga, Atari, MacOS, OS/2 and Unix.  A
   tool for MSX-DOS named PMarc reused the container  format  with  a  new
   compression algorithm (.pma extension).

   The  Unix  version  of  the  tool was developed by Masaru Oki, Nobutaka
   Watazaki and Tsugio Okamoto, but was released under a software  license
   that  does not conform to the Free Software or Open Source Definitions.
   Lhasa was developed as a drop-in replacement that is Free Software  and
   Open Source.

BUGS

   The current version does not allow the creation of new archive files.

   Some obscure compression algorithms are not currently supported (-lh2-,
   -lh3-, -lx1-, -lhx-).

AUTHOR

   Lhasa was written and is maintained by Simon Howard.

COPYRIGHT

   Copyright  2011, 2012 Simon Howard.

   Permission to use, copy, modify, and/or distribute  this  software  for
   any  purpose  with  or without fee is hereby granted, provided that the
   above copyright notice and this permission notice appear in all copies.

   THE  SOFTWARE  IS  PROVIDED  "AS  IS"  AND  THE  AUTHOR  DISCLAIMS  ALL
   WARRANTIES   WITH   REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED
   WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR
   BE  LIABLE  FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES
   OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR  PROFITS,
   WHETHER  IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
   ARISING OUT OF OR IN CONNECTION WITH THE USE  OR  PERFORMANCE  OF  THIS
   SOFTWARE.

                                                                    lha(1)

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