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                             LHARC Vrs. 1.03

                           for OSK (OS9/68000)

         Compatible with version 1.13 of Lharc for MSDOS systems

            OSK port by Mike Haaland (CompuServe: 72300,1433)

							October 14, 1990

                     Last Updated:  March 25, 1992


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 --- Introduction ---

Lharc is an archive program such as Arc and Zoo. It can store several
files in one archive in a compressed form which is generally more
efficent than that used by Arc and Zoo.  It also supplies all of the
archive handling capabilities that an archive program should have.

Another important feature of Lharc is its ability to preserve the file
attributes.
 
Its only weakness is compression speed: Zoo 2.0, for example, is
faster, but if compression efficency is more important for you than
compression time you'll surely appreciate this progam. (anyway
decompression is much faster than compression)



 --- How to use ---

Lharc is run from shell with the following command line:

  Lharc -<command>[<options>] <Archive> [<file patterns>]

items in square brackets are optional.



<Command> can be any of the following (case is not significant):


  e,x  extract files from archive
       Extracts files from archives. If you specify some file names
       or patterns only those files satisfying the patterns are
       extracted, otherwise all the files in the archive are
       extracted.  While extracting files, Lharc checks if a file by 
	   the same name already exsists in the destination directory and
	   prompts you before overwriting the old file with the extracted 
       one (unless you specified the -f option)  If the files have a 
	   path name stored in the archive, they are extracted with their
	   path and needed directories are automatically created.

  l    List archives contents
       Displays the names of the files in an archive along with their
       date, time, CRC, original length and compressed length.

  v    Verbose list of archives contents
	   Same as 'l', but will show extended header info and machine
       that the archive was created on.  Moreover 'v' will also show 
	   all attributes etc.

  p    extract and print files to screen
       same as 'e' and 'x', but extracted files are sent to stdout
	   A print header is also shown and looks like:

	   ::::::::::FILENAME::::::::::

	   This feature is included so when redirected to the printer,
       you know which file you printed.  You may turn off the print
       header by using -pq (The'q' singifies quiet mode)

  a    Add to existing archives or create a new archives
       Files are stored in alphabetical order.

       If you try to archive a file and a file by the same name
       already exists in the archive the file will not be added
       and a message will be printed on the screen to inform you. 

       Also, by default file attributes are stored, use the 'g'
       option to create [GENERIC] format archives.

  m    Move files into archive
       Same as add, but deletes original files after archiving them

  d    Delete files from archives
       You can delete from an archive.

  u    Update files in archives
       Same as with the 'a' command.  However, if a file already 
       exists in the archive, Lharc will check its time stamp and will
       keep the newer one and ignore the older one.

  c    reConstruct an archive
       Replaces a file in the archive with the newer one only if a 
	   file with the same name already exists in the archive.
       Otherwise, no action is taken.


<Archive> is the name (eventually preceded by a path) of the
archive you want to work on. If no extension is specified the default
extension .LZH is used. 


[<file patterns>] represents an optional number of file names
They indicate which files to extract/compress/list/delete, etc. 
Lharc is case sensitive, therefor while extracting files from an 
archive individually, the [<file pattern's'>] must match, exactly,
the file names stored in the archive.  When extracting you may specify
a directory as a [<file pattern>] and all files and sub-directories
that are stored in that directory will be extracted from the archive.
For example, it the archive myfiles.lzh contained the following files:

 TEST/TEST1/filet1
 TEST/TEST1/filet2
 TEST/file1
 TEST/file2
 file

and you wanted to extract all files in TEST/TEST1 only:

 lharc -x myfiles TEST/TEST1

This would extract TEST/TEST1/filet1 and TEST/TEST1/filet2 only.

 lharc -x myfiles TEST

will extract the TEST directory, all files within it and also extract
TEST/TEST1 and all it's files also.


[<options>] represents an optional number of switches that are used
to change the behavior of the program.  A switch is composed by a 
leading '-' followed by a command and then may immediatly followed 
by one or more options.  Example:

Lharc -pq archive.lzh readme.txt 

This tells Lharc to extract 'readme.txt' from 'archive.lzh' and print
it to standard out, with no print header.  You need not supply an 
option in the switch, but must supply a command.

Here is a summary of the available options:

   v  Verbose
      prints lots of neat info to let you know exactly what LHarc is
      doing.

   q  Quiet mode
      Suppresses the display of what files are being processed
      during compression or decompression.  Also inhibits the output
      of the print header during '-p' operations.

   f  Force overwrite on EXtraction/Update modes
      Suppresses all the queries Lharc normally issues before
      overwriting existing files.

   g  create GENERIC archive
      By default Lharc will stores and restores file descriptor info
      indicating creation date, last modification, and file attributes,
      in an extended header.  This option will create archives 
	  compatible with the MSDOS version:  in other words it will
      store files with an attribute bit pattern which is suitable for 
      MSDOS machines while during extraction it will ignore the
      attributes stored in the archives, setting the attributes of the
      extracted files to the usual read and write attributes.
      If you do not use this switch, on the contrary, files will be 
      stored with their original attributes and during extraction the
      stored attributed will be restored.
      Remember that, to effectively preserve file attributes, you must
      not use this switch during compression.
      Of course OSK file attributes are meaningless to MSDOS and
      vice-versa.  
   
   t  Text mode
      When using the 't' option.  Lharc will attempt to change all 
      CR/LF combinations to CR's during extraction and change CR's 
      to CR/LF during compression.  This is useful when you are 
	  extracting text files or source code.

   r  Recursive expansion of directories
      This option, when used with the command '-a', will expand
      and archive any directories or sub-directories given as file
      arguments.  Great for archiving entire disks.

   z  read list of files from stdin
      an example would be to pipe the output of 'dir -u' or re-
      direct the input from a file having filenames 1 per line.
      Such as:

      dir -u ! lharc -az myfiles

      or

      lharc -az myfiles <my_file_list


 --- Temporary files ---

While compressing files Lharc creates a temporary file called
'LhXXXXXX' where XXXXXX is a hex digit representing the process ID.
This file is created in the current working directory.  You may specify
a different directory to create the 'LHXXXXXX' file in by setting the
environment variable TEMPDIR.

The reason for the XXXXXX part of the name is that if you run multiple
copies of Lharc at the same time each copy will create its own temporary
file with a different name (usefull for multiuser systems for example).
Also, if adding files to an existing .LZH file, Lharc will rename the 
original .LZH file to file.bak.   If file.bak already exists it will be
silently overwritten.

NOTE:  rename no longer must be available for use by Lharc!!!


 --- Bugs ---

No known bugs at this time.  If you find any, please notify me
by any means available to you.


 --- FYI ---

LHarc will properly archive and extract directories.  This is very handy
for source code, etc.  For example:

 dir -u ! lharc -azr stuff.lzh

 or

 lharc -ar stuff.lzh *

will archive everything in the current directory, and all sub-directories
below it.  Upon extraction, lharc will create the sub-directories if they
do not exist.

If you are having difficulty with taking apart SelF-eXtracting archives,
try renaming the archive with the extension .exe or .com.  Lharc looks at
the file extention to determine if the archive is of the self-extracting
type.

LHarc will NOT, at present unfreeze LHA archives.  I do have plans to
add the decompression routine to handle these archives RSN.

OSK Version 1.0

Ported from the UNIX sources Vrs. 1.02 by Mike Haaland	 10/14/1990

Vrs. 1.00 - 
     
  o Establishes an OSK extended header that allows saving file 
    descriptor info in archives created on an OSK machine, which,
 	when extracted on another OSK machine will be retained.  All
    other Machines will think the archive is in a "GENERIC" format
    and will still be able to take apart the archive.

Vrs. 1.01 -

  o Added display of storage method in the verbose -lv or -vv options.
  o No longer requires 'cio' (OSK 2.2 would choke on the Makdir calls)

Vrs. 1.03 - module edition 14

  o Added recursive directory archiving '-r' option.
  o Also LHarc will now set the creation and modification dates to
    match those in a [Generic] .lzh file upon extraction.
  o Removed the 'rename' dependency.
  o Changed Lharc to no longer accepts hardcode pathnames during
    archiving. (IE: /dd/file)  Only relative pathnames are allowed.
  o Zero length filenames are now displayed when archiving and
    during extraction if the 'v' option is used.
  o The environment variable TEMPDIR is check, if it exists, all
    temporary files used by Lharc will be created in that directory.
  o Fixed LHarc to delete temporary file if no valid filenames are
    given during -a 'add' command.

 --- Compatibility ---

This program is aimed at full compatibility with the MSDOS version
1.13 of Lharc and UNIX version 1.02.

As noted above, LHarc will NOT, at present unfreeze LHA archives.
I do have plans to add the decompression routine to handle these
archives RSN.



 --- Acknowledgements ---

First of all I give credit to Haruyasu Yoshizaki for devising such an
efficent compression algorythm as LZHUF.
And Y. Tagawa, who did the UNIX port of Lharc, which is what the OSK
version is based upon.

Also to Paolo Zibette - Fidonet 2:331/101.6 - who wrote the Amiga
version of Lharc and documented the features in english.  (Without
his docs, you'd still have none!!!)  ;-)


 --- How to Reach Me ---

I may be reached the following ways: 

Phone (Voice) :  (702) 362-5346
CompuServe    :  72300,1433
Internet      :  mike@htsmm1.las-vegas.nv.us
Delphi        :  MIKEHAALAND
US Mail       :  4341 Gannet Cir #174, Las Vegas, NV. 89103  U.S.A.
			 
Mike Haaland

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This is the output of lharc -?

LHArc - OSK V1.03 port by M. Haaland - Mar. 25 1992
Usage: lharc -<cmd>[<opts>] <archive> {[<files or directories ... >]}
Function: Archive Management Utility
Commands:
   a    Add (or replace/create) to archive
   x,e  EXtract from archive
   l,v  List / Verbose List contents
   u    Update newer files to archive
   d    Delete file from archive
   m    Move file to archive
   c    re-Construct to a new archive
   p    Print file from archive to stdout 
Options:
   q    Quiet
   v    Verbose
   n    no execute (debugging option)
   f    Force (overwrite at extract)
   t    Text-mode (convert LFs to CRs)
   g    Generate [generic] format .lzh files
   r    Recursive expansion of dirs (use with -a)
   z    read filenames from stdin

The environment variable TEMPDIR may be set to specify
the directory used for temporary files when archiving

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