The California Collection/TheCaliforniaCollection.cdr/his008/arj222.exe/arj/ARJ.DOC

Text File | 1991-10-29 | 101KB | 2,635 lines

     User's Manual for the ARJ archiver program,           October 1991



    ARJ software and manual copyright (c) 1990,91 by Robert K Jung.
    All rights reserved.

        ARJ version 2.22 release




     ** IMPORTANT NEWS ****************************************************

    Users of ARJ should read the WHATSNEW.DOC and UPDATE.DOC which
    contain information about the latest improvements to ARJ.

     **********************************************************************




     TOPICS COVERED IN THIS DOCUMENT
     -------------------------------

     INTRODUCTION
     TERMINOLOGY
     MAJOR FEATURES OF ARJ
     ARCHIVER BENCHMARKING
     RELEASE NOTES
     ARJR AND DEARJ PROGRAMS
     INSTALLATION
     QUICK START TO USING ARJ
     HOW TO CREATE AN EXECUTABLE SELF-EXTRACTING ARJ ARCHIVE
     CONVERTING OTHER ARCHIVE FILES TO ARJ FORMAT
     HOW TO USE ARJ
     ARJ LIMITATIONS
     DIFFERENCES BETWEEN ARJ AND LHARC
     IMPORTANT NOTES
     TIPS TO USING ARJ EFFICIENTLY
     USING ARJ WITHIN OTHER PROGRAMS
     ARJMENU PROGRAM
     USING ARJ AS A BACKUP PROGRAM
     THE FILESPEC "..."
     ARJ ERROR SITUATIONS
     ARJ DOS ERRORLEVELS
     ARJ USER ACTION PROMPTS
     ARJ ENVIRONMENT VARIABLE
     ARJ COMMAND LINE SYNTAX
     ARJ COMMANDS
     ARJ SWITCH OPTIONS
     ARJ_SECURITY ENVELOPE
     KNOWN ARJ ISSUES/PROBLEMS
     ARJ TECHNICAL SUPPORT
     ARJ AVAILABILITY
     DISTRIBUTORS
     ACKNOWLEDGEMENTS
     USAGE AND DISTRIBUTION POLICY
     FINAL COMMENTS




     INTRODUCTION:

    ARJ is the result of my desire to use my interest in compression
    technology to produce an archiver for personal use on my PC and on
    minicomputers that provides power and excellent flexibility.

    This all started with the invention of an LZ77 brute force hashing
    algorithm that outperformed all other LZ77 algorithms.    Having an
    invention in hand gave me the confidence to enter into the
    compression fray.

    ARJ is prototyped in ANSI C and only uses ANSI C standard
    libraries.  All platform dependent functions (file date-time
    modified, file attributes, etc.) are contained in a single
    environment source file using #ifdefs to enable one to maintain a
    single version of the source code for multiple different machines.

    The MS-DOS production version of ARJ has manually optimized
    compression, extraction, CRC, and output routines (in assembler).

    There are plans to port versions of ARJ to other platforms in the
    coming year pending sufficient time and funding.


     TERMINOLOGY:

    The following terms are used through this manual.

    ARCHIVE - This is a file containing one or more files in a
    compressed or non-compressed state and containing file related
    information such as filename and date-time last modified, etc.

    ARJ FILE - This is an archive created by ARJ.

    COMPRESSION - The process of encoding redundant information into
    data requiring less storage space.

    COMPRESSION PERCENTAGE/RATIO - The percentage compression reported
    by ARJ is a variation of one of the TWO standard methods of
    expressing compression ratio in the technical literature.  ARJ uses
    the compressed size / original size ratio.  The other method is the
    inverse ratio.    When ARJ reports 96% as the compression ratio, that
    means that the compressed file is 96 percent of the original size
    (very little compression).  Other archivers use their own methods.
    LHARC uses the same ratio as ARJ.

    EXTRACTION or UNCOMPRESSION - The processing of recreating the
    exact information that was previously compressed.

    SELF-EXTRACTION MODULE (SFX) - This is an archive that is an
    executable file that is capable of extracting self-contained files.

    TEXT MODE - In text mode, ARJ inputs the file using the C library
    text mode which translates the carriage return, linefeed control
    characters of MS-DOS to a single linefeed character.  This saves
    space and provides the option for cross platform file extraction.
    On another platform, the host C library would change the single
    linefeed to the host text newline separator sequence.  In addition,
    for platforms such as PRIMOS which set bit 8 in ASCII text
    characters, ARJ sets/resets bit 8 according to the platform
    extracted to.  All input is stripped to 7-bit ASCII.

    VOLUMES - These are ARJ archives that are in sequence and have been
    created by a single ARJ command.  Files in the volumes may span
    volumes in a split format.  These volumes are usable archives.


     MAJOR FEATURES OF ARJ:

    Currently ranks as the best in compression in terms of size
    reduction of the currently available archivers including PKZIP
    1.10, PAK 2.51, ARC 7.0 (ARC PLUS), LHARC 1.13c, LHA 2.13 and the
    new ZOO 2.10.  ARJ is particularly effective with database files,
    graphics files, and large documents.  With the "-jm" or "-jm1"
    option, ARJ usually compresses even smaller at a cost of time.
    With the appropriate compression options, ARJ is also FASTER
    compressing while still compressing tighter than all of the
    aforementioned archivers.  (Against PKZIP, use ARJ -m3).

    Archive and individual file comments with option of inputting
    comments from a file.

    ARJ has MS-DOS 3.x international language support for the proper
    casing of filenames and text.

    32 bit CRC file integrity check.

    DOS volume label support.

    Empty directory support.

    Test new archive before overwriting the original archive option.

    Multiple volume archives with one ARJ command.    This allows the
    user to backup a full hard disk drive to multiple floppies.
    Recovery of individual files is convenient because each volume
    is an individual archive except for split files.  No need to use
    SLICE with ARJ.

    File re-ordering facility with the option of sorting by file size,
    file extension, CRC value, date-time modified, filename, pathname,
    compression ratio, file attribute and more.

    String searching with context display within archive files.

    Built-in facility to recover files from broken archives.

    Self-extraction feature that is internal to the ARJ runfile.  The
    SFX module is full-featured with a built-in help screen.

    Internal string data integrity check in ARJ to resist hacking a la
    LHARC to ICE.

    Archive security envelope feature to resist tampering with secured
    archives.  This feature disallows ANY changes to a secured archive.
    Not even comments can be changed.

    Password option to encrypt archived files.

    Text mode data compression option to enable movement of text files
    from one host machine to another.  Text mode also results in
    slightly greater file size reduction on MS-DOS machines.

    File extraction to screen in a paged mode to permit browsing
    through an archive.

    Specification of the files to be added to an archive via one or
    more list files.  In addition, ARJ can generate a list file.

    Specification of files to be excluded from processing by ARJ.

    Sub-directory recursion during compression and extraction.


     ARCHIVER BENCHMARKING:

    This is information for those who plan to publish benchmark test
    results comparing ARJ with other file archivers.

    The ARJ -jm -m1 compression is intended to demonstrate the best
    that ARJ can do in terms of size reduction.  The ARJ -m1 (default)
    compression is intended to compete with LHA 2.12.  The ARJ -m2
    compression is intended to compete with PKZIP 1.10.  The ARJ -m4 is
    provided as a very fast compression method suitable for use in disk
    backups.

    The ARJ -e option is necessary during size benchmarks because ARJ
    by default stores the entire specified pathname in the archive as
    opposed to other archivers which strip path specs.

    The very size of the ARJ runfile adds significantly to the
    compression and extraction times when testing smaller archives.  It
    would be fairer to use larger archives or run the archivers from a
    RAMDISK.  Also, compressed executables affect the test times, so
    that all archivers should be tested in uncompressed form.

    The ARJ comment header adds bytes to the size of an ARJ archive.
    The larger file headers also add bytes to the size of an ARJ
    archive.  So, in size benchmarks compressing a large number of
    small files, the header size difference will be evident.


     RELEASE NOTES:

    The only difference between the registered version and the
    shareware version is the version/copyright message.

    This release states that it is NOT for commercial use.    Commercial,
    institutional and government users must purchase a site license to
    obtain a registered version of ARJ for their use.  However,
    commercial, institutional and government users may use ARJ for
    evaluation purposes for a period of 30 days.  See the LICENSE.DOC
    for details.

    While evaluating ARJ, you should use the "-jt" (test archive)
    option to verify new ARJ archives of your data.

    This version has been tested under DOS 2.11, 3.3, 4.01, and
    DOS 5.0.

    The executables ARJ.EXE and REARJ.EXE can be compressed by DIET,
    LZEXE, and PKLITE (not PKLITE 1.05).

    Here is a suggested command that will test ARJ on all of your files:

    ARJ a -r -jt -y "-vasdel a:\vol.*" a:\vol c:\*.*


     ARJR AND DEARJ PROGRAMS:

    The new programs ARJR and DEARJ are available to registered and
    licensed users of ARJ.    ARJR is the ARJ program minus the help
    screen and SFX modules.  DEARJ is the ARJR program minus the
    archive creation/modification functions.  See the LICENSE.DOC and
    ORDERFRM.DOC for more information.

    UNARJ and DEARJ are NOT the same program.


     INSTALLATION:

    I assume that you have a copy of the self-extracting ARJ module
        named ARJ222.EXE.  Typing ARJ222 [RETURN] at the DOS command prompt
        will initiate the self-extraction feature.  ARJ222 will by default
        extract its files to the current directory.  When ARJ222 starts,
    you will see several lines of text describing ARJ and then a line
    asking if you wish to continue extraction.  Entering "yes" or "y"
    will continue the extraction.  If there are any duplicate filenames
    in the current directory, the program will prompt you for
    overwriting.  You can say "yes", "no", or "quit".

    To install the ARJ software, simply copy ARJ.EXE, REARJ.EXE,
    REARJ.CFG, and ARJSORT.COM to one of the directories named in your
    DOS PATH statement found in your AUTOEXEC.BAT.    On many PCs, this
    directory may be C:\DOS or C:\BIN.  With MS-DOS 3.0 and above, you
    can use path notation "\BIN\ARJ e archive" to use ARJ.

    You may, of course, prefer to use ARJ 1.00 or higher to extract the
        contents of ARJ222.EXE file manually.

        Example:  ARJ e ARJ222.EXE \temp\


     QUICK START TO USING ARJ:

    Please note that switch options may be placed anywhere in the
    command line.

    To create an ARJ archive containing all of the files in the
    current directory:

    ARJ a archive

    To create an ARJ archive containing all files with the ".DOC"
    extension in the current directory:

    ARJ a archive *.DOC

    To create an ARJ archive containing all of the files in the
    named directory and all files in subdirectories of the named
    directory:

    ARJ a -r archive named_directory\*.*

    To create an archive containing files without path specs:

    ARJ a -e archive named_directory\*.*

    For maximum compression, use the "-jm" or "-jm1" options.
    For better speed, use the -m2 option.

    ARJ a -r -jm archive named_directory\*.*
    ARJ a -r -m2 archive named_directory\*.*

    To create an ARJ archive containing the full specified pathnames
    of the stored files including any drive and root specs.

    ARJ a -r -jf archive C:\top_directory\*.*

    To backup your hard disk to multiple volume archives on drive A
    with archive testing and archive bit resetting:

    ARJ a -r -jf -jt -a1 -b2 -vvas A:backup C:\*.*

    To extract all of the files in an archive to the current
    directory:

    ARJ e archive

    To extract all of the files in an archive to a named directory:

    ARJ e archive named_directory\

    To extract all files with the ".DOC" extension to the current
    directory:

    ARJ e archive *.DOC

    To extract all of the files in an archive recreating the
    original directory structure:

    ARJ x archive original_directory_name\

    The ending "\" character is optional.

    To extract all of the files in an archive containing absolute
    pathnames to the original paths:

    ARJ x -jf archive

    To list all of the files in an archive:

    ARJ l archive


     HOW TO CREATE AN EXECUTABLE SELF-EXTRACTING ARJ ARCHIVE

    The command "ARJ f -je archive ..." will create a full featured
    self-extracting archive from an already built archive.    No error
    message will be displayed concerning not finding "...".

    The command "ARJ f -je1 archive ..." will create a smaller
    self-extracting archive.

    Syntax:  ARJ f -je archive ...        produces archive.exe

    Under DOS systems other than 2.11, 3.2, 3.3, 4,0, and 5.0 you may
    have to rename the self-extract module to ARJSFX.EXE to do the
    extraction.

    See the "-je" option for more information.


     CONVERTING OTHER ARCHIVE FILES TO ARJ FORMAT

    Included with this software is the program REARJ.  This program can
    be used to individually or collectively convert archive files from
    other formats to the ARJ format.

    REARJ *.ZIP *.ARC *.LZH   will convert all ZIP, ARC, and LZH
    archives in the current directory to the ARJ format.  See the
    REARJ.DOC for more information about REARJ.


     HOW TO USE ARJ:

    If you type ARJ [return], you will see a simple help screen.

    If you type ARJ -? [return], you will see more detailed help
    information.


     ARJ LIMITATIONS:

    ARJ will accept up to:      64 filenames/wildnames on command line
                   16000 filenames resulting from wildnames
                8000 filenames/wildnames to exclude
                8000 ARJ filenames resulting from wildnames
                2048 character comments
                     (up to 25 lines or 1 file)

    For compressing, ARJ requires approximately 282,000 bytes plus the
    memory necessary to store all of the pathnames to be archived when
    using the default compression method (-m1).

    For extracting, ARJ requires approximately 166,000 bytes plus.
    The program DEARJ (available to registered users) requires
    approximately 123,000 bytes plus.

    There is no limitation on the number of files that can be stored in
    one archive.  However, each add command can only add a maximum of
    16000 files at a time depending upon memory availability.  I expect
    that a normal maximum of 5000 to 8000 filenames can be handled
    without running out of memory during the compress phase.

    If you do not have enough memory, you should use the "-l" switch to
    dump the filenames to a list file.  You can then break the list
    file into smaller files and use multiple ARJ commands to archive
    all of the files.

    Example:

       ARJ a -r -lname.lst archive \*.*

       If the above command fails due to lack of memory, split the
       name.lst file into smaller pieces named name1.lst, name2.lst,
       etc.  Then execute:

       ARJ a archive !name1.lst
       ARJ a archive !name2.lst
       .
       .

    ARJ currently does NOT differentiate between wildnames like "C:*.*"
    and "C:\*.*".  ARJ would expand each of those two wildnames into a
    list that could be up to twice as long as necessary.

    When updating an archive, ARJ creates a temporary file named
    ARJTEMP.$nn in the current directory or work directory.

    While ARJ is scanning a wildcard filespec, ARJ will change the name
    of the target archive to ARJTEMP.$nn while the scan is proceeding
    to avoid including the archive itself in an add or move command.
    Also, as a result, you cannot add a file named ARJTEMP.$nn to an
    ARJ archive.  Please note that the name of this temporary file may
    change at a future revision of ARJ.


     DIFFERENCES BETWEEN ARJ AND LHARC:

    The archive formats are NOT compatible.

    The compression and decompression algorithms are NOT compatible.

    ARJ only supports its own archive format.

    ARJ by default stores the full specified pathname of files
    archived minus any drive letter and root symbol.

    The "e" and "x" commands will by default extract all of the files
    in the archive without using date time stamps to select files.    You
    should specify "-u -y" to duplicate LHARC functionality.

    The "f" command in ARJ requires the -r switch to be identical to
    the LHARC f command.

    The ARJ archive suffix is ".ARJ".


     IMPORTANT NOTES:

    When using the "-w" working directory switch, ARJ does not check on
    space availability before overwriting the original archive if it
    exists.  Be sure that you have enough disk space for the new
    archive before using the "-w" switch.  If ARJ aborts in this
    situation because of disk space, ARJ will keep the temporary
    archive.

    By default, ARJ does not see hidden or system files.  ARJ will
    process system and hidden files when you either specify the "-a"
    switch.

    Like LHARC and PKZIP, ARJ requires extra disk space to UPDATE an
    archive file.  ARJ will backup the original archive while it
    creates the new archive, so enough room must be available for both
    archives at the same time.

    Currently, ARJ will not extract overwriting a readonly file.


     TIPS TO USING ARJ EFFICIENTLY

    When archiving to diskettes, you should use the "-w" option to set
    a working directory on your RAMDRIVE or hard disk drive to speed up
    building the archive.

    Using the "-js" option saves time by not compressing archives.

    You should use the "-jt" option when archiving to diskettes or when
    you really want to be sure that ARJ will be able to extract what
    you have archived.  There are cases where your hardware or memory
    resident software will corrupt your work, so the "-jt" option is
    excellent insurance.

    You should use the "-e" option whenever you do not need to store
    pathnames in an archive that you are creating.    This will save
    space.

    Convert an ARJ archive into a self-extracting archive with a
    command like the following:  ARJ f archive ... -je

    To capture a comment from an ARJ archive, use the following
    command:  ARJ e archive ... -zcomment.txt

    ARJ has several compression methods that provide size/time
    tradeoffs.  Method 4 "-m4" is about twice as fast as method 1.    The
    "-jm1" and "-jm" options modify the "-m1" and "-m2" options to
    provide even greater compression at a cost in time.


     USING ARJ WITHIN OTHER PROGRAMS

    Since ARJ uses over 280,000 bytes of memory during compression, it
    is difficult to use ARJ in a large application program unless that
    program swaps itself out of memory when it executes DOS commands
    like ARJ.  However, there is at least one shareware program
    available that will automatically swap your large application
    program out of memory whenever it shells out to DOS to execute a
    command.  The program SHROOM by Davis Augustine should be able
    solve this memory problem for you.  The latest version is named
    SHROM17D.ZIP on Channel1 BBS.  According to the SHROOM
    documentation, you can reach the author at:

        CompuServe id 72230,3053

        Davis Augustine
        P.O. Box 390178
        Cambridge, MA 02139

    This is not an endorsement of the product SHROOM.

    The easiest way I have found to use this product is to type:
    SHROOM COMMAND

    SHROOM -v COMMAND will let you see SHROOM in action when you shell
    out to execute a DOS command.


     ARJMENU PROGRAM

    A new program called ARJMENU by Michael McCombs has been released
    as ARJM100.EXE.  As far as I know, it is the only menu-driven
    interface program that supports ALL of the features of ARJ.  This
    program is aimed at users who hate command line interfaces.
    ARJMENU allows the user to pick and choose ARJ options.  The user
    does not have to remember the ARJ switch syntax.  This program
        supports ARJ version 2.22.  You can reach the author at:

        Internet/ARPANet: [e-mail]

        Michael McCombs
        517 Ninth Ave. #310
        Seattle, WA. 98104


     USING ARJ AS A BACKUP PROGRAM

    ARJ can be used as a substitute for a backup program.  However, it
    does not have the diskette critical error handling or data recovery
    facilities of a FASTBACK, etc.    So you should be sure of the
    reliability of your diskettes.

    The following partial command lines illustrate a full backup
    command, an incremental update command, and a restore command.    The
    only parts missing are the names of the files to backup/restore.

    ARJ a A:backup -r -vvas -a1 -b2 -i1 -js -jt -jiC:\backup.inx -wC:\ -m4

    ARJ a A:backup -r -vvas -a1 -b1 -i1 -js -jt -jiC:\backup.inx -wC:\ -m4

    ARJ x A:backup -vv -jycn

    You should familiarize yourself with the above switches so that you
    can modify the above command lines as needed.

    If you have a RAMDRIVE large enough, you should change the "-w"
    option to point to the RAMDRIVE.

    If you have enough free hard disk space, you can build all of the
    diskette volumes on the hard disk for later copying to diskette.
    In this case, you will need to change the name of the archive to
    "C:backup" or similar.    The "-vvas" option should be changed to
    "-v360", "-v720" or whatever is appropriate for your diskette size.
    Please note that 360, 720, 1200, and 1440 are abbreviations for the
    standard diskette sizes.  Other sizes will require your entering
    the entire number.  Another change is to add the option "-y" which
    will turn off the "Ok to proceed ..." prompt.  Lastly, if the "-w"
    option is pointing to the hard disk, you should remove the "-w"
    option entirely.

    ARJ a C:backup -r -v360  <other options>   -m4 -y

    ***IMPORTANT*** Only a maximum of 100 volumes can be built on disk
    at one time because of the volume suffix rolling over at *.A99 to
    *.A00.    A workaround to this limitation is to archive your hard
    disk with several ARJ commands building different volume names.

    Both backup commands will pause for a "system command".  You can
    execute DOS commands at this point.  This is a suitable place to do
    a "dir a:" to make sure that your disk is formatted and has enough
    free space on it.  You may need to execute "format a:" or
    "del a:\".  A very useful command might be "QDR A:".  QDR is a
    utility from Vern Buerg.  You will need to type "exit" to allow ARJ
    to continue.

    If the backup fails after completing one or diskettes, you can
    restart at the next archive after the last successful volume.  You
    will need to examine the information in the "backup.inx" file to
    find the name of the file that is to start this archive.  It will
    usually be the same as the last filename in the previous volume.
    You will also need the byte position to start in this same file.
    That can be determined from the information in "backup.inx".  You
    can then retype the exact same backup command as before with a few
    changes.  You will append the right ".Ann" suffix to the archive
    name and you will add the options "-jx" and "-jn" with the proper
    arguments.

    For example, if the above backup command failed during diskette
    two, on filename "DOS\MODE.COM" which was started at byte 125.
    This would be the correct command:

    ARJ a A:backup.A01 -r -vvas -a1 <other> -m4 -jx125 -jnDOS\MODE.COM

    The most error prone step is determining the correct "-jn" option.
    Be sure to spell the filename exactly the same as it appears in the
    "backup.inx" file.

    If the restore fails after one or more diskettes, simply retype the
    same command as before but add the right ".Ann" suffix to the
    archive name.  If ARJ has aborted because of a disk full on a file
    split between volumes, you will have to restart at the first volume
    that contains that file.


     THE FILESPEC "..."

    Several times in this document and the UPDATE.DOC file, there is
    mention of the filespec "...".     This filespec is chosen so as to
    not match any existing filename.  ARJ will NOT generate an error or
    warning for not matching "..." specifically.


     ARJ ERROR SITUATIONS:

    ADD:

    If a user specified file is not found during an add, ARJ will
    continue processing, and will keep the archive and terminate with
    an error condition.

    In a disk full condition or any other file i/o error, ARJ will
    promptly terminate with an error condition and delete the temporary
    archive file unless the user has specified the "-jk" switch.


    MOVE:

    ARJ will only delete files that have been successfully added to the
    archive.  If you have specified the "-jt" (test) switch, ARJ will
    abort on any error.  If you specify the "-jk" switch, ARJ will not
    delete the temporary archive upon an abort.


    EXTRACT:

    In a disk full condition or any other file i/o error, ARJ will
    promptly terminate with an error condition and delete the current
    output file.


    CRC ERRORS OR BAD HUFFMAN CODE:

    In the case where an ARJ archive has been corrupted ARJ will report
    a CRC error or a Bad Huffman code error.  These corruptions can be
    the result of an unreliable diskette, a computer memory problem, a
    file transfer glitch, or incompatible CACHING software.  Most of
    these errors are the result of file transfer glitches and bad
    diskettes.  A few are the result of an incompatible interaction
    with SUPER PCKWIK 3.3 advanced diskette support.


     ARJ DOS ERRORLEVELS:

    0 ->   success
    1 ->   warning (specified file to add to archive not found,
            specified file to list, extract, etc., not found,
            or answering negatively to "OK to proceed to next
            volume..." prompt)
    2 ->   fatal error
    3 ->   CRC error (header or file CRC error)
    4 ->   ARJ-SECURITY error or attempt to update an ARJ-SECURED archive
    5 ->   disk full or write error
    6 ->   can't open archive or file
    7 ->   simple user error (bad parameters)
    8 ->   not enough memory


     ARJ USER ACTION PROMPTS:

    ARJ prompts the user for action at certain times.  There are
    several types of prompts.  One is for yes/no permission, another is
    for a new filename, another is for archive comments, and one other
    is for search strings.    The yes/no prompts will also accept "quit"
    for program termination and "always" to bypass further user
    prompts.

    Since ARJ uses STDIN for user input, be careful about typing ahead
    anticipating prompts.  ARJ may prompt you for an unexpected action
    and use your earlier input.

    The "-jy" option lets you change the prompting modes to single
    character query mode.  See the section on "-jy" for more
    information.


     ARJ ENVIRONMENT VARIABLE:

    ARJ will first look for an environment variable named ARJ_SW and
    use its value as switch options for ARJ.  If ARJ finds such an
    environment variable, it will display a message to that effect.

    You can inhibit ARJ from using this environment variable by using
    the "-+" option.

    SET ARJ_SW=<switches>

    Example:  SET ARJ_SW=-w\temp -k -e

    Do NOT add any blanks after the variable name ARJ_SW.  As in LHARC,
    command line switches can be selected to override ARJ_SW settings.

    ARJ will allow you to use a different switch character "-" or "/"
    in ARJ_SW and in the command line except when using the "-ju"
    (unix) option.

    If the ARJ_SW environment variable specifies a filename (text not
    beginning with a switch character), ARJ will open that filename and
    scan it looking for a line of text that begins in column 1 with the
    same letter as the ARJ command being executed.    The following text
    is processed as the ARJ_SW switches.  This allows each ARJ command
    to have its own switch settings.  If no such command text is found,
    then no switch settings are processed as the ARJ_SW switches.

    SET ARJ_SW=C:\ARJ\ARJ.CFG

    C:\ARJ\ARJ.CFG contains:
    a -jm1 -jt -i1
    l -jp
    e -i1
    c -zcomment.txt

    In the above example, any ARJ "a" commands will use "-jm1 -jt -i1"
    as the ARJ_SW switch options.

    The ARJ_SW variable or the ARJ_SW configuration file switch
    settings may NOT have quoted switches such as "-vasformat a:".


     ARJ COMMAND LINE SYNTAX:

    ARJ <command> [-<switch>[-|+|<option>]...] <archive_name>[.ARJ]
    [<base_directory_name>\] [<!list_name>|<path_name>|<wild_name>...]

    Commands and switches can be entered in upper or lower case.
    Switches can be placed anywhere after the command ARJ.

    ARJ supports the use of either "-" or "/" as the switch option
    character.  The first occurrence of either "-" or "/" that ARJ
    encounters in the ARJ_SW variable will determine the switch symbol
    for processing ARJ_SW.    The first occurrence of either "-" or "/"
    that ARJ encounters in the command line will determine the switch
    symbol for processing the command line except when the "-ju" (unix)
    option has been specified in ARJ_SW.  You may NOT mix and match
    switch symbols.  Throughout this document, the symbol "/" may be
    substituted for "-" in switch usage.

    Examples:  ARJ a A:archive *.* /va /r     is correct
           ARJ a A:archive *.* /va -r     IS INCORRECT USAGE!

    Switch options SHOULD NOT be combined.    At this time combinations
    such as "-ki" representing "-k" and "-i" will work, but may not in
    the future.

    The switch option "--" tells ARJ that there are no more switch
    options to process in the current command line.  This is useful
    when you need to enter filenames beginning with "-".
    Example:  ARJ a archive -- -testfile

    The standard ARJ file suffix is ".ARJ".  Subsequent multiple volume
    archives end in ".A01", ".A02", etc, up to .A99, .A00, .A01.

    The ARJ command must be the first non-switch argument after "ARJ".
    The ARJ archive name must be the first filename on the command
    line.  The base directory, if any, must be the second filename
    argument.  The switches and other filenames can be in any order.
    The base directory name should end with "\" (backslash) or ":"
    (colon).  However, ARJ will still accept directory names without
    the "\" character if the directory already exists.

    You can specify a wildcard for the archive name such as "*.ARJ" for
    all ARJ commands except for the add commands (a, f, j, m, u).  If
    you also specify the "-r" switch,  ARJ will search sub-directories
    for ARJ archives (*.ARJ) also.

    Example:  ARJ l -r *         will list all of your *.ARJ files.
          ARJ c *.arj -zbbs.cmt  will comment all of your archives.

    Switches specified on the command line will either toggle or
    override switches specified with the ARJ_SW environment variable.
    Switch usage is identical to that of LHARC.

    "-s+"         turns on switch "s".
    "-s-"         turns off switch "s".
    "-s"         toggles the state of switch "s".
    "-sname"     provides the name argument for switch "-s".
    "--"         skip processing of any more switch options.

    Wild_names follow MS-DOS convention.  "*.*" means all files.
    "*.DOC" means all files with an extension of ".DOC".  "?B*.*"
    means all files with a second character of "B".

    The default for <wild_name> for all commands except for "d" is
    "*.*".

    For the add, move, freshen and update commands, filename matching
    in the archive requires an exact path match depending upon the "-e"
    option.  For non-update commands, specified filenames with paths
    will force a full pathname match.

    You can supply one or more filenames for files containing lists of
    files to be added to an archive.  The filenames must be listed one
    per line with no leading or trailing blanks.  The list filename(s)
    must be prefixed with "!".  If you want to archive a filename
    beginning with !, you must use the "-!" option to set a new list
    file character.

    You can exclude filenames/wildnames from the list of filenames to
    be processed by ARJ.

    Example:  ARJ a software *.* -x*.exe -x*.obj   adds all files
    in the current directory except .EXE and .OBJ files.


     ARJ COMMANDS:

    a: Add files to archive

       This is the basic command to add disk files to an ARJ archive.
       You can specify 0 to 64 filename arguments (one can be a
       destination directory).  The arguments can be wildnames.  If
       you specify the "-r" switch (recurse subdirectories), ARJ
       will add all of the files in all of the subdirectories that
       match the specified wildname.

       Example:  ARJ a archive subdir\*.*
             Archive all files in directory "subdir".

       For maximum compression, use the "-jm" switch option.

    c: Comment archive files

       This command allows you to comment the header and individual
       files.  ARJ will prompt you for each comment.  The user will be
       prompted for up to 25 lines for each comment.  A line containing
       only a [return] will terminate the comment.

       The user can choose to input comment data from a file by entering
       the comment filename preceded by an "!" as in "!archive.txt"
       starting in column 1 of the first comment line.  This file is
       read as a text file.  The lines in the text can be up to 2048
       bytes long.    Only the first 2048 bytes of the file will be
       accepted by ARJ.

       To erase a comment from an archive, type [space] [return] on the
       first comment line and [return] on the second comment line.

       You may also erase a comment with the following command:
       "ARJ c archive -zerase.txt"    where erase.txt contains only a
       [space] and [return].

       To add only the archive comment and not file comments, use the
       following command:

       ARJ c archive -z

       To add only the archive comment at the command line, use the
       following command:

       ARJ c archive -zcomment.txt

       You may also comment an archive with the "a", "f", "m", "u"
       commands.

       ARJ a -zcomment.txt archive *.txt

    d: Delete files from archive

       This command allows you to delete files from the archive.  When
       wildcard selection is not suitable, you can use the "-q" switch
       which causes ARJ to prompt you for deletion for each file
       selected.

       Example:  ARJ d archive *.c
             Delete all files in archive ending in ".c".

             ARJ d -q archive *.c
             Prompt before deleting each file ending in ".c".

    e: Extract files from archive

       This command will extract one or more files from the archive to
       the current directory or base directory if specified.  ARJ will
       prompt the user before overwriting existing files unless the
       user specifies the "-y" switch.  If the user gives a "no"
       answer, ARJ will prompt for a new filename.    If the user enters
       a single [return] instead of a filename, ARJ will skip the
       current file extraction.

       Example:  ARJ e archive soft\ *.c
             Extract all files ending in ".c" to subdirectory
             "soft".

       When extracting a file located on multiple volumes, ARJ may
       prompt the user with an "Append? " prompt.  This will usually
       occur with files split across volumes.  You will also need to
       specify the "-v" switch to force ARJ to continue to the next
       volume of a series of volumes.  When extracting from one of a
       series of multiple volumes on a diskette, it is easier to use
       the wildcard "*.*" to specify the archive as in:

       ARJ e archive A:*.* filespecs

       If you wish to extract only a portion of an archive and that
       portion is a directory containing directories, you should use
       the "-p1" switch.  See the "-p" switch for more information.

       If ARJ encounters a disk full during extraction, ARJ will abort
       with an error.  You can bypass the abort by using the "-jd"
       option.  Refer to the description of "-jd" for more
       information.

    f: Freshen files in archive

       Update matching files in the archive that are OLDER than the
       selected disk files.

       Example:  arj f archive *.c *.h

       In freshening archives, you should use the same filename
       specifications that you used to create the archive.

       Example:  arj a archive \temp\ *.* -r
             arj f archive \temp\ *.* -r

       If no files or comments have been added to the archive, ARJ
       will not rewrite the archive at ARJ 2.20 and above.

    i: check Integrity of ARJ.EXE

       The "i" command allows the user to check the integrity of the
       ARJ.EXE program.  ARJ will report CRC ERROR! if the tested ARJ
       program does not pass its integrity check.  This indicates that
       the program is probably corrupted.  Please note that the "i"
       command should not be used on a compressed ARJ executable
       (DIETed, LZEXEd, etc.), since the "i" command will then ALWAYS
       report a CRC error.    If the program name is not specified, then
       ARJ will check the current program being executed.

       Syntax:  ARJ i ARJ.EXE
            ARJ i         at DOS 3.0 and up

    j: Join archives to archive

       The "j" command allows the user to merge multiple ARJ
       archives.  You should not use the "o" command to reorder a
       merged multiple volume archive because of the split files.
       ARJ expects to find the pieces of a split file in consecutive
       order.

       Syntax:  ARJ j archive archive1.arj archive2.arj
            ARJ j archive *.arj -r

       Some switches NOT supported by the "j" command are:    -o, -ob,
       -f, -u, -c, -d, -v.    Note that there is no error message
       displayed by ARJ when using an unsupported switch with the "j"
       command.

       The "-d" option IS supported by the "j" command.

       Note that switches that do work like "-x" select the archives to
       be merged and NOT the contents of the archives.

       This command can be used to convert an SFX module to a regular
       ARJ archive.

       Example:  ARJ j new_name arjsfx.exe

    l: List contents of archive

       List contents of archive to standard output.  The display can be
       paused after each screenful with the "-jp" switch.  The files
       are listed in stored order.    There are no sort options
       currently.

       The last field on the display TPMGVX stands for:
           T -> text/binary/directory type
           P -> path information available in "V" listing
           M -> compression method used
           G -> file has been garbled (encrypted)
           V -> archive has been continued to another volume
           X -> this file is an extended portion of a larger file

       Example:  arj l archive *.c *.h

       A "+" sign preceding the date-time field indicates that the date
       is a 21st century date (20nn).

       The original file size reported by the "l" and "v" commands is
       the actual number of bytes input during text mode compression.
       This is usually the MS-DOS file size minus the number of
       carriage returns in the file, since C text mode strips a file of
       carriage returns.

    m: Move files to archive

       This command is similar to specifying the "a" command with the
       "-d" switch.  The "m" commands adds the selected files to the
       archive.  If the adds are successful, then the added files are
       deleted.  The move command does not ask permission before
       deleting the files.    Use the "ARJ a -d" command for that
       feature.

       Example:  ARJ m archive soft\*.*

       The "m" command when used with "-f" and "-u" will delete any
       successfully added files as well as any files that are already
       up to date in the archive.

    n: reName files in archive

       This command allows you to change the names of the files stored
       in an ARJ archive.  ARJ will prompt for the new name of each
       selected file.  You can skip changing the name of a particular
       file by entering a blank line.

       Example:  ARJ n archive *.c

       In the above example, ARJ prompts for new names for all *.c
       files.

    o: Order files in archive

       This command allows you to re-order the files within the
       archive.  You may specify the order of files on the command line
       or you can use one or more list files.  Any files in the archive
       that are not specified on the command line or in a list file
       will be placed at the end of the archive in the same relative
       order that they were originally.  No wildcard names can be used
       as order specifications.  The filenames in the list file must be
       entered one per line.

       Example:  ARJ o archive file1 file2 file3

       In the above example, the files "file1", "file2", and "file3"
       will be ordered first in the archive.  Any remaining files will
       follow those.

       Example:  ARJ o archive !list

       In the above example, the archive will be ordered according to
       the order of the names in the file "list".

       IMPORTANT:  For the "o"rder command, the list file option has
       one special feature.  If the list file is named ARJSORT.$$$, ARJ
       will expect the file to have been built with the ARJ v -jv1
       command.  This ARJSORT.$$$ list file may be specified with a
       pathspec.  See the ARJSORT.BAT batch file for an example of this
       special feature.

       To facilitate building list files, the "v" command in ARJ will
       produce special outputs with the "-jv" switch and the "-jv1"
       switch.

       The "-jv" switch will display only the pathnames stored within
       the archive.  No other listing data is displayed.  This output
       can be re-directed to a file for manual sorting into a list
       file.

       The "-jv1" switch will display the standard verbose display with
       a few modifications.  No comment field will be displayed.  The
       pathname is appended to the archive file description data
       instead of being on a separate line.  Displayed just before the
       pathname field are the file extension and filename.    These
       fields are available so that the user can sort the text lines by
       date-time, file extension, CRC value, etc.  Text editors like
       Qedit and SLED allow the user to sort text lines via an embedded
       text field.

       IMPORTANT:  You should NOT change the order of files in a
       multiple volume archive.  ARJ expects the first file and the
       last file in such an archive to have certain flags set.
       Re-ordering the archive may cause problems with any split files.

       At ARJ 2.20 and above, you cannot "o"rder a multiple volume
       archive.

    p: Print files to standard output

       Output files to standard output.  This function works such that
       the output file will contain only the file data extracted.  This
       is important for UNIX-like usage.

       Example:  ARJ p archive manual.doc > output.fil

       In the above example, output.fil will be an exact copy of
       manual.doc.    There will be no extraneous header information in
       output.fil.    All extraction phase information is written to the
       STDERR device, which is normally the display screen.

       Example:  ARJ p archive manual.doc > LPT1

       In the above example, the standard output is redirected to the
       printer device.  This does not involve any intermediate disk
       files.

       The "-jp" option can be used to pause the screen output as in the
       "s" command.  The "-jv" option will allow the display of IBM
       graphics characters with the "-jp" option.

       NOTE:  Because of a problem using fwrite() and STDOUT, errors
       occurring during redirection to serial and printer ports may not
       be detected.  Errors during redirection to disk files will be
       detected.

    r: Remove paths from filenames

       This command causes ARJ to remove the path component from the
       specified filenames stored in the archive.  The default is all
       filenames stored in the archive.  This command is useful if you
       forgot to specify "-e" to exclude paths.

    s: Sample files to screen with pause

       This command is similar to the "p" command except that one
       screenful of data is displayed to the user and a user action is
       then requested.  The action prompt can be suppressed with the
       "-y" switch.

       The "s" command filters the text to output by truncating at 79
       characters per line and displaying '?' for control characters.
       The "-jv" option will allow the display of IBM graphics
       characters.

    t: Test integrity of archive

       Test the contents of the selected files for the correct CRC
       value.  ARJ uses a 32 bit CRC to validate the contents of the
       files.  The use of 32 bit CRCs is many times better than the
       use of 16 bit CRCs for the detection of errors.

       Use this command to fully test the security envelope on an
       ARJ-SECURED archive.

    u: Update files to archive

       Update older files in the archive and add files that are new to
       the archive.

       Example:  arj u software

    v: Verbosely list contents of archive

       This command lists the full pathname and comments of the archive
       files as well as the same information as the "l" command.

       Use the "-jp" switch to pause the output after each screen.

       The "-jv" switch will display only the pathnames to the screen.

       The "-jv1" switch will display the archive data in a manner
       suitable for sorting on various fields for use with the "o"
       command.

    w: Where are text strings in archive

       This option will cause ARJ to prompt the user whether to ignore
       case when searching.  This option will take MS-DOS code pages
       into account so that casing of accented/umlauted characters will
       be done correctly.

       It will also prompt the user for the number of lines of context
       of a match to display.  If a number greater than zero is chosen,
       ARJ will display the matched string and the surrounding context
       with all of the non-printable characters including newlines
       replaced by question marks.    The context lines displayed will be
       78 characters in length.  When the display context option is
       chosen, ARJ will inhibit the progress indicator.  If the "-jv"
       is set, IBM graphics characters (128 to 255) will be displayed.

       Then, this command will prompt the user for up to 20 text strings
       to search for within the archive.  A count of all matches will be
       displayed after each individual file is scanned.

       Search strings are limited to 79 characters.

       Matches that span archive volumes will not be detected by
       this string search.

       You can search multiple ARJ archives with a command like:

       ARJ w \docs\*.arj

    x: eXtract files with full pathname

       This command extracts one or more files from the archive to
       their full paths in the current directory or to the base
       directory if specified.  ARJ normally stores pathnames as if
       they were children of the target directory.    Any drive or root
       directory specifications are stripped before extracting unless
       the "-jf" switch is specified with the "x" command.

       Example:  arj x archive *.c

       If you wish to extract only a portion of an archive and that
       portion is a directory containing directories, you should use
       the "-p1" switch.  See the "-p" switch for more information.

       Refer to the description of the "e" command for more
       information about extraction.


     ARJ SWITCH OPTIONS:

    The letters within the parentheses:

       (All) - all commands
       (afu) - add, freshen, update, move commands
       (Upd) - any command that modifies/updates an archive
       (ce)  - comment and extract commands
       (ex)  - extract commands
       (lv)  - list commands

    ?: Display full help screens

       The command "ARJ -?" displays several screens of help
       information with page pauses.  The command "ARJ -? -jp" displays
       the help screens without page pauses.  You can also redirect the
       output to a file as in:

       ARJ -? > help.txt

       ARJ may not detect network file redirection and will pause per
       screenful.

    -: (All) skip any more switch options

       The switch option "--" will cause ARJ to stop looking for any
       more switch options on the command line.  This is useful for
       entering filenames beginning with "-".

       Example:  ARJ a archive -- -file

    +: (All) inhibit ARJ_SW usage

       The switch option "-+" will inhibit ARJ from using the value of
       the ARJ_SW variable in ARJ switch processing.

       Example:  ARJ a archive -+ *.*

    !: (All) set list char

       This option allows the user to set the character used for list
       files.  The option "-!" with no specified character toggles
       (turns off) the current list file character (default "!").

       Syntax:  ARJ a archive -!@ @list.fil
            ARJ a archive -! !.bat

       The first example above sets the list file character to the one
       used by LHA and PKZIP.

    $: (auex) add/extract volume label

       This option allows the user to store or extract DOS volume
       labels in ARJ archives.  It is possible to have multiple labels
       in one archive.  At ARJ 2.10 and above, you can only add or
       extract volumes labels at DOS 2.0 and above.  The "-$" option
       may be specified with or without a drive specification.  The
       drive can be specified by appending the letter and optionally
       the ":" to "-$".  If none is specified, ARJ assumes the current
       drive unless a specified target base directory has a drive
       specification.

       WARNING:  Currently, ARJ allows more than one volume label and
       duplicate volume labels in the same archive.  You can delete one
       or more duplicate labels with the "ARJ d -q archive label"
       command.  ARJ will query you on each occurrence of "label".
       This "faulty" mechanism allows a file and label of the same name
       to be added to an archive.  The capability of having duplicate
       labels in the same archive MAY NOT be present in future versions
       of ARJ.

       The SFX and SFXJR modules DO NOT support volume label extraction!

       On the list screen, volume labels will be indicated by the "V"
       under the "T" column.

       Syntax:  ARJ a archive -$           add all files and the label
                           of the current drive.
            ARJ a archive ... -$B      add only the label of drive B
            ARJ a archive ... -$B:     add only the label of drive B
            ARJ u archive ... -$B:     add only the label of drive B

       To extract volume labels, you must select the label by setting
       "-$" and specifying a matching wildname/filename.

       Syntax:  ARJ e archive doslabel -$  extract the label named
                           doslabel to the current drive.
            ARJ e archive -$D:           extract all files to the
                           current drive and extract the
                           label to drive D:.
            ARJ e archive label B:\ -$ extract all files to B:\ and
                           the label to drive B.

       ARJ will display all labels over 8 characters with a "." in it
       like a normal DOS filename.    However, ARJ will not restore this
       extra "." when extracting.  ARJ will only create standard
       uppercase DOS volume labels.

       Volume labels created by utilities other than standard DOS
       commands like LABEL and FORMAT may cause label access problems
       for ARJ.  For example, Norton's VL.EXE can create labels with
       lowercase letters.  You will need to use LABEL.COM to delete
       these labels in order to let ARJ set a new label.  Programs that
       can delete unusual labels have to do absolute writes to disk or
       use a wildcard ("*.*") delete of files with the label attribute
       in the root directory.  A single bit corruption in the program
       can result in the deletion of ALL files in the root.  ARJ
       currently chooses not to take that risk.

    a: (afu) allow any file Attribute

       By default ARJ will not select system or hidden files via
       wildcarding unless the "-a" option is specified.

       The "-a1" switch causes ARJ to add any directories in the
       selected set of matching filespecs to the archive being built.
       This switch also selects hidden and system files as in the "-a"
       switch.  Even empty directories will be added.  The "l" command
       will display such directories with a "D" under the "T" (file
       type) header.

       Older releases of ARJ will skip over empty directory entries.
       The ARJSFX and ARJSFXJR modules CAN process empty directory
       entries.

       This option is useful for saving software directories with
       needed empty directories.

    b: (afu) Backup changed files

       The "-b" switch will select only files that have the archive bit
       set.

       If you specify the "-b1" option, files with the archive bit set
       will be selected and the archive bits of all archived files will
       be reset after a successful archive has been built.

       Example:  arj a a:backup1 c:\*.* -b1 -r -va     simulates BACKUP
       command.

       The "-b2" switch does NOT select files.  It causes ARJ to reset
       the archive bits of added files.  If the "-f" or "-u" option has
       been selected, ARJ will reset the archive bits of files that are
       already duplicated in the archive.

       Example:  arj a e:archive c:\*.* -b2 -r    archives all files on
       the C drive and resets all archive bits.

    c: (All) skip time-stamp Check

       Normally with the "u" and "f" commands, ARJ will only update
       files to an archive which are newer.  The "-c" switch will cause
       ARJ to update the archive regardless of the date-time modified
       time stamps.

       When extracting files from an archive with the "-y" and "-f"
       switches set, ARJ would normally skip extracting older files.
       The "-c" switch will force ARJ to extract these older files.

    d: (afu) with Delete (move)

       This switch provides the standard MOVE command.  Successfully
       added files will be deleted.  When used with the "-f" or "-u"
       option, ARJ will also delete files that are already duplicated
       in the archive.  ARJ will prompt the user before deleting the
       files unless the "-y" switch is specified.  Also, you can use
       the "m" command which does not prompt before deleting the files.

       ARJ a archive filename -d -y       is equivalent to

       ARJ m archive filename          and

       ARJ a archive filename
       delete filename

    e: (afu) Exclude paths from filenames

       By default ARJ always stores the pathname of the archived file.
       This switch will cause ARJ to store only the filename component.

       The "-e1" switch option causes ARJ to NOT store the base
       directory name with the filenames in the archive.

       Example:  ARJ a archive C:\SOFTWARE\ARJ\ *.* -r -e1

       In the above example, ARJ will NOT store the C:\SOFTWARE\ARJ\ as
       part of the filenames.

       When updating files within an archive, ARJ uses the full
       pathname to match against the full name of the selected files.
       The "-e" and "-e1" option affect this exact matching.  If "-e"
       is specified, only the filespecs of the selected files will be
       matched against the full pathname of the files in the archive.
       If "-e1" is specified, the full pathname minus the base
       directory of the selected files is used to match against the
       full pathname of the files in the archive.

       In other words, ARJ will only update a file within an archive if
       the name of the new file as stored in the archive would be
       identical to the name of the original file stored in the
       archive.

    f: (All) Freshen existing files

       This switch used with the "e" or "x" commands causes ARJ to only
       extract newer files from the archive.

       This switch used with the "m" command causes ARJ to update only
       input files with newer dates than the ones in the archive.
       After the archive has been updated, all updated selected files
       and all up to date selected files will be deleted.

       The ARJ m -f command is very similar to the LHARC m command.

    g: (All) Garble with password

       This switch followed by a password "-gpassword" will encrypt or
       decrypt an archived file.  During a "l" or "v" command, a
       garbled file will display an "G" after the method number.

       Example:  ARJ e archive -gpassword

       Using the wrong password during extraction will result in a
       "Bad Huffman code" or "Bad CRC" error message.

    i: (All) with no progress Indicator

       Do not display the percentage progress indicator.  The progress
       indicator appears during the add, extract, search, and test
       operations.

       The "-i1" option provides a bar type graphical progress
       indicator for the compression, extraction, and testing type
       commands of ARJ.  This provides an alternative to the simple
       numeric increasing percentage progress indicator.

    j: (All) selects alternate set of switch characters.

       This switch toggles the set of switch characters.  The toggle is
       reset at end at of each separate switch sequence back to the
       main set of switch characters.

       For example, "-ja" is not the same function as "-a".  However,
       "-jja" is the same as "-a" because of the double toggle.  Also,
       "-jaje" is NOT the same as "-ja -je".  The switch sequence
       "-jae" is the same as "-ja -je".

    k: (Upd) Keep archive file backup

       Backup the original archive file during an update.  The old
       archive will be suffixed with ".BAK".  Any existing ".BAK" file
       will be overwritten.

    l: (All) create List_name file

       This switch will cause ARJ to dump to the filename after the
       "-l" switch all of the filenames to be processed by this ARJ
       command.  This list contains all files that matched the file
       wildnames given on the command line.  Other options do NOT
       affect the output of filenames to this list file.  To get an
       index file for backup purposes, use the "-ji" option.

       This list file can be used as a listfile on the command line.

       Example:  ARJ a -lname.lst archive *.exe

       This example will create a file named "name.lst" with all *.exe
       files.

    m: (afu) with Method 0, 1, 2, 3, 4

       Method 0 = storing    (no compression)
       Method 1 = best compression for general use
                (default compression method)
                (requires 282,000 plus bytes memory)
       Method 2 = slightly less compression and faster
                (requires 282,000 plus bytes memory)
       Method 3 = less compression and less memory and faster
                (requires 250,000 plus bytes memory)
       Method 4 = fastest compression
                (requires 235,000 plus bytes memory)

       Method 2 (-m2) provides an excellent combination of speed
       and size reduction.

       Example:  ARJ a archive *.exe -m2

       The "-jm" option will usually improve the size reduction of
       methods 1 and 2 at the cost of speed and memory.  The behavior
       of "-jm" with -m3 and -m4 is UNDEFINED.

       Method 4 uses a different decoder than 1 to 3.  Method 4 is
       almost twice as fast as method 1.

       During extraction, ARJ uses less memory than during compression.
       See the section on ARJ LIMITATIONS for more memory usage
       information.

    n: (All) only New files (not exist)

       With the "e" or "x" commands, extract files that do not exist in
       the target directory.

       WIth the "a" or "m" commands, archive files that do not exist in
       the target archive.

    o: (All) On or after date YYMMDDHHMMSS

       The switch "-o" by itself means select files modified today.  If
       "-o" is followed by a date and optionally a time, ARJ will only
       select files modified on or after that date-time.

       Example:  ARJ a test -o9001021700    means select files modified
       on or after Jan 2, 1990, 5:00 PM.

       Years less than "80" will be considered as 21st century years.

       There is no option for using other date-time formats.

       The switch "-ob" selects files modified before today.  If "-ob"
       is followed by a date and optionally a time, ARJ will only
       select files modified before that date-time.

    p: (All) match using full Pathnames

       When "-p" is specified, ARJ looks for an exact pathname match.
       This can be modified by the "-e" option.

       For non-update commands and specified filenames with paths, ARJ
       will match the full path with or without the "-p" switch.

       To match directory paths that contain subdirectories, you should
       use the "-p1" switch.  This switch sets ARJ to match only the
       initial portion of the pathnames against the wildnames
       specified.  For example, if your archive contains the TURBOC++
       directory named TC and you wish to extract the INCLUDE
       subdirectory along with the subdirectory INCLUDE\SYS, you can
       use the following command:

       ARJ e archive TC\INCLUDE\*.* -p1

       If you wanted to extract all of the INCLUDE\S*.* files including
       the contents of the SYS subdirectory, you can use the following
       command:

       ARJ e archive TC\INCLUDE\S*.* -p1

    q: (All) Query on each file

       This switch causes ARJ to prompt the user prior to acting upon
       each archived file for all but the "j", "l", "t", "v", and "w"
       commands.  This allows you to selectively delete, add, etc.

    r: (All) Recurse subdirectories

       This switch will cause ARJ to recurse any wildcards specified on
       the command line including ARJ archive filenames by traversing
       all subdirectories scanning for matches.

       ARJ will also recurse non-wildcard filenames as in:
       ARJ a archive FILE.BBS -r

    s: (Upd) set archive time-Stamp

       This switch causes ARJ to set the date-time stamp of the archive
       to that of the newest file in the archive.

       This option will also work with non-update commands as in:
       ARJ l archive -s ...

       The "-s1" switch is used to keep the old archive date-time
       stamp.  The new archive will have the same timestamp as the
       original archive.

       The "-s2" switch is like the "-s" switch except that it only
       works for archive modification commands.  This makes it more
       suitable for use in the ARJ_SW environment variable.

    t: (afu) set file Type

       This switch causes ARJ to open and read the file to be archived
       in binary or text mode.  The default is binary mode (-t0).  To
       archive in text mode, use the -t1 switch.  The "-t" switch is
       equivalent to "-t0".

       If you specify the switch "-t0", ARJ will always use the binary
       mode even for freshening text mode files already in the archive.

       The file type "text" is only needed for future cross platform
       transfers of ARJ archives.  It enables ARJ to extract text files
       to the host file system with the text newline sequence that is
       correct for that operating system.

       However, this mode may produce slightly better size reduction.
       The "-t1" option combined with "-jh65000" can produce some of
       the best size reduction numbers.  Extraction of files compressed
       in text mode is significantly slower than the extraction of
       binary files.

       DO NOT use the text mode on non-text files!!!  On non-text files
       ARJ will prematurely stop input if it finds an embedded EOF
       character (CTL Z).  This will produce a LOSS of data on binary
       files.  Graphics characters and some printer control characters
       are considered non-text.  The "-t1" options strips the text to
       7-bit characters.

       ARJ will look at the first 4096 bytes of the input file looking
       for 8-bit non-text data.  If ARJ finds any 8-bit data, it will
       automatically backtrack and switch to "-t0" (default) binary
       mode for that particular file.  In addition at the end of
       compressing the input file, if ARJ finds that the input file
       size is not greater than 75 percent of the binary file size
       (size on disk), ARJ will report an error for that input file and
       increment the error count.  This should help avoid the problem of
       accidentally compressing executable files with the "-t1" option
       which results in lost data.    These tests are not foolproof.

       The original file size reported by the "l" and "v" commands is
       the actual number of bytes input during text mode compression.
       This is usually the MS-DOS file size minus the number of
       carriage returns in the file, since C text mode strips a file of
       carriage returns.

       The "-t" option has been modified to allow setting file type by
       suffix similar to "-js" option.  If you want to set the file type
       to text mode for .ASM and .C files, you would specify the option
       "-t1.asm.c".

       ARJ a archive *.* -t1.asm.c.h.doc

       If you to specify the binary file type by suffix, you must specify
       the default file type to text and then specify the type by suffix,
       because the default file type is normally binary.

       ARJ a archive *.* -t1 -t0.com.exe.obj

       Because of the way ARJ checks all files to be archived in text
       mode, some true text files will not pass the test.  In this
       case, you can specify the "f" modifier to force text mode.  This
       modifier can be combined with the "-t1." suffix option.  This
       will not force ARJ to use text mode on a true binary file.

       ARJ a archive *.bat -t1f
       ARJ a archive *.* -t1f.bat.asm.doc

       One trick that you can do with the -t1 option is to convert UNIX
       text files to MS-DOS text files.  If you have extracted the
       files out of the ZOO 2.10 archive and need to convert the
       linefeeds to carriage return/linefeed, you can use the following
       commands:

       ARJ a archive *.* -m0 -t1
       ARJ e archive *.* -y

    u: (All) Update files (new and newer)

       This switch used with the "e" and "x" commands causes ARJ to
       extract newer and non-existing files.

       This switch used with the "m" command causes ARJ to update only
       input files with newer dates than the ones in the archive and
       add new files to the archive.  After the archive has been
       updated, all added files and updated selected files and all up
       to date selected files will be deleted.

    v: (All) enable multiple Volumes

       This switch is required to put ARJ into multiple volume mode.

       This switch allows the creation of multiple volumes in the ADD
       mode.  The command "arj a a:arjvol \*.* -b -r -v360000" allows a
       user to backup up all files changed since the last backup to
       multiple floppy disks.  ARJ will pause between volumes to allow
       changing disks.  Subsequent volumes will be suffixed .A01, .A02,
       .A03, ... , .A99, .A00, .A01, etc.

       Archived files can be split across volumes.    ARJ will try to
       fill each volume to within 200 to 3000 bytes of specified
       maximum size.

       The command "arj x a:arjvol -v" would restore files starting
       from arjvol.arj.  You must specify the entire ARJ volume name
       including the .Ann suffix when starting from the middle of a
       series of volumes.

       The pauses between volumes can be suppressed with the "-y"
       switch.  You should not suppress the pauses when archiving to
       diskettes or extracting from diskettes.  The "-jy" option will
       allow you to suppress specific types of queries.

       ARJ x a:arjvol -v -jyco

       The above example extracts in multiple volume mode and
       suppresses prompting for permission to create directories and to
       overwrite existing files.  ARJ will assume yes in these cases.

       Because of the splitting process, archived split files with a
       size of zero bytes are possible.  This is not an error.

       If you comment your archives with long comments, you should take
       that into account when specifying volume size.  You should
       specify a smaller volume size during the "a" command before
       adding the comments.

       The "-v" switch will accept the abbreviations 360, 720, 1200,
       and 1440.  These will be translated to 362,000, 730,000,
       1,213,000, and 1,457,000 bytes, respectively.  Please note that
       if the available disk space is less than the requested amount,
       ARJ will prompt the user for permission to continue.

       You can use the "K" modifier as a shortcut for "000".  For
       example, 100K means 100000.    "K" does not mean 1024.

       The "-vv" switch turns on the next volume beep option.  When you
       select this option, ARJ will sound a beep prior to the next
       volume.  The "v" modifier must come before any other modifier.

       The "-va" switch sets the disk space auto-detect option.  ARJ
       will check for the disk space available on the target directory
       and try to use all or most of it.  This option is aimed at
       diskette usage.  Please note that this switch option detects
       free disk space.  It does not detect formatted disk space.
       If the space available is less than 10,000 bytes, ARJ will
       prompt the user for permission to continue.

       Examples:  ARJ a A:backup -b -va
              ARJ a backup -v360

       The switch modifier "s" can be used to make ARJ execute one
       specified system command prior to each volume or make ARJ pause
       for manual execution of system commands.  This is useful for
       purging target diskettes before ARJ writes to them.    The "s"
       modifier must follow the "a" modifier or the volume size.
       Optionally, after the "s" modifier, you can specify a system
       command or batch file name.    ARJ will automatically execute the
       command or batch file before each volume.  If the command has
       embedded blanks, then the entire switch option must be
       surrounded by double quotes.  The system command is executed
       before ARJ executes the auto-detect space option.

       Examples:  ARJ a A:backup -vas
              ARJ a A:backup -vvas
              ARJ a A:backup -v360s
              ARJ a A:backup -vv360s
              ARJ a A:backup -vaspurge.bat
              ARJ a A:backup -v360sdelete.bat
              ARJ a A:backup "-vasFORMAT A:"
              ARJ a A:backup "-vasDIR C:\ "

       Note that the last example has a space before the last double
       quote mark.    If the last space is missing, the internal command
       line parser will make the double quote mark part of the DIR
       command.

       Volume archives can be used as stand-alone archives save for the
       files that are split across volumes.

       It is recommended that the "-jt" (test archive) option be used
       with the "-v" switch to ensure perfectly built volumes as it is
       tedious to retest volumes after they are built.

       During ARJ operation in non-update commands, ARJ will not abort
       when it cannot open the correct sequential ARJ volume archive.
       It will report the open error and proceed to the "Ok to process
       the next volume?" prompt.  At this point it is possible to swap
       diskettes to put the correct volume in place.  This feature is
       disabled if the "-y" option has been specified.

       For those who have enough free hard disk space, the -v option
       can be used to make backing up the hard disk fairly easy.  ARJ
       can be set to create multiple floppy sized volumes on the hard
       disk for later copy to diskettes.  So even if ARJ is slow, you
       can fire up an ARJ backup and some time later, you can quickly
       copy the volumes to floppies.  Below are sample backup commands:

       arj a backup *.* -b2 -r -v360 -y -jt -js    full backup
       arj a backup *.* -b1 -r -v360 -y -jt -js    incremental backup

       See the "-jn" and "-jx" options to see how to recover from an
       abort in the middle of a backup type operation.

       WARNING:  Updating multiple volume archives with the "-v" switch
       set is NOT recommended, especially if the new file sizes are not
       identical.

       TIP:

       To pre-determine the number of diskettes required to archive a
       set of data, you can take advantage of the "s" option of the
       "-v" switch.  The "s" option lets you execute a DOS command
       prior to each volume.  You can specify a command that deletes
       the previously created archive volume.  This lets you use the
       same floppy diskette/hard disk space to build the multiple
       volumes.

       Example:  ARJ a -r "-vasdel a:volume.a??" -y a:volume c:\*.*

    w: (Upd) assign Work directory

       By default, ARJ builds a new ARJ archive file in the same
       directory as the old archive file.  By specifying the "-w"
       switch, you can specify the working directory where the
       temporary archive file will be built.  After the temporary
       archive file is built, it is copied over the original one and
       deleted.

       Normally ARJ requires enough disk space for the original archive
       and the new temporary archive.  Specifying the "-w" switch
       allows you to move some of that disk space requirement to
       another directory.

       If the copy of the temporary archive on top of the original
       archive fails because of an I/O error, you will have to manually
       do the copy.  ARJ will not delete the temporary archive in this
       error situation.  If you CTL BREAK during the copy process, ARJ
       will delete both the temporary archive and the original archive
       files.

       Example:  ARJ a -we:\temp\ archive *.c

       For speed reasons, you should always use the "-w" option when
       creating or modifying archives on diskettes.  You should specify
       a work directory on your hard disk or ramdrive.

       Example:  ARJ a -we:\ b:archive *.c

    x: (All) Exclude filenames

       This switch is used to exclude filenames or wildnames from the
       list of filenames to be processed.

       Example:  ARJ a archive soft\*.* -r -x*.exe -x*.obj -xtest

       This example will archive all files in the soft directory and
       sub-directories with the exception of any files named "test"
       or ending in ".exe" and ".obj".

       You can also specify an exclude file list by preceding the
       filename with the list character "!".  The exclude file list
       must contain a list of filenames/wildnames one per line with no
       leading or trailing blanks.

       Example:  ARJ a archive soft\*.* -r -x!exclude.lst

       You can specify a pathname to exclude as in:

       ARJ a archive \dir\*.* -r -x\dir\*.*

       In the above example, ARJ will exclude all files in \dir
       but not the subdirectories in \dir.

       The "-x" option also allows you to exclude an entire path
       including subdirectories from being selected for processing.

       Syntax:  ARJ a archive C:\*.* -xC:\TEMP\

       The "\" after C:\TEMP indicates to ARJ that everything below
       C:\TEMP\ is to be excluded.

       Note that the exclude directory option requires that the
       directory be specified in the same relative path that the
       selected files use.

       Example:

       arj a archive \temp\*.* -x\temp\firstdir    is correct usage
       arj a archive \temp\*.* -xC:\temp\firstdir    is NOT correct because
                            of the C:

       The "-x" switch also works for non-update commands like
       "e"xtract and "l"ist.

       Examples:

       arj e archive -x*.exe       extract all files except *.exe files
       arj l archive -x*.exe -x*.obj   list all files except *.exe and *.obj

       A maximum of 8000 filenames or wildnames can be excluded.

       Note that the "-x" option is unaffected by the "-p" option.

    y: (All) assume Yes on all queries

       Use this switch for batch type uses of ARJ.    This switch
       disables most of the normal user queries during ARJ execution.
       Use this switch to suppress overwrite queries in the "e" and "x"
       commands, to suppress the make new directory query in the "e"
       and "x" commands, to suppress the new filename prompt when an
       open file operation fails in the "e" and "x" commands, to
       suppress the pause during the "s" command and to suppress the
       next volume pause using the "-v" option.

       Use this option with due caution, especially during extraction
       as this sets ARJ to overwrite files.  However, the "-n" option
       can be used to avoid any overwriting.

       As an alternative, you can use the "-jy" option which lets you
       suppress individual types of user queries.

    z: (afuce) supply file for archive comment

       The "-z" switch has been provided to facilitate batch commenting
       of ARJ archives with the "c" command.  When the "-z" option has
       been specified with or without a comment file, ARJ will only
       process the archive header comment and will skip any file
       commenting unless the "-jz" switch has been specified.

       A comment file containing only a single blank can be used to
       erase comments from ARJ archives.

       Syntax:  arj c archive -z
            arj c archive -zcomment.txt
            arj a archive -zcomment.txt

       The "-z" option also allows one to dump the ARJ archive header
       comment to a file.  This will only extract the main archive
       comment and not the individual file comments.

       Syntax:  arj e archive ... -zcomment.txt    dumps only the comment
            arj x archive -zcomment.txt        dumps comment and files

       ja: (All) show ANSI comments

       Display any ANSI escape sequences unaltered.  By default, escape
       characters in comments are not displayed.  Not displaying ANSI
       command is the default because of ANSI BOMBS.  Using ANSI
       commands, it is possible to redefine the keyboard of users using
       certain ANSI drivers.  For example, a key could be redefined to
       "echo y | del \*.*".

       jd: (exlv) ensure free Disk space

       In extraction mode, this option causes ARJ to always ensure that
       it will leave the user specified amount of disk space available.
       ARJ will skip files that would exceed the disk space available
       limit.  Files that are skipped will each count as an error.    The
       default free space is zero bytes.

       Example:  ARJ e archive basedir\ *.doc -jd100K

       In the above example, ARJ will not extract any files that will
       cause the disk free space to be less than 100,000 bytes.  The
       "K" is a synonym for "000".    For example, 100K means 100000.

       In "l"ist or "v"erbose list mode, this option sets an error
       check at the end of the listing screen based upon the total of
       the original sizes of the files selected.  If the total size
       would exceed the user specified free space limit, ARJ will
       report an error at the end of the listing screen.

       Example:  ARJ l archive *.doc -jd10000

       In this example, ARJ will report an error if the current
       available disk space minus the total of the *.doc files is less
       than the specified minimum of 10,000 bytes.

       Example:  ARJ e archive *.* -jd0

       In this example, ARJ will skip extraction of any files that
       would result in a disk full error.

       je: (Upd) create self-Extracting archive

       This option causes ARJ to create a self-extracting .EXE file
       instead of an .ARJ file.  This ARJSFX self-extractor is about
       15000 bytes in size and supports full pathname extraction.  The
       "-je1" switch creates a smaller self-extracting .EXE file.  The
       ARJSFXJR module is about 5400 bytes in size.  Both modules
       supports display of the archive comment.  The ARJSFX module
       also provides a query to continue the extraction.

       The SFX modules do NOT support multiple volume archives.  That
       would serve little purpose because you would have to distribute
       multiple files anyway.  In this case, DEARJ (available to
       registered users) would serve adequately.  DEARJ supports all of
       ARJ extraction functionality including multiple volume archives.

       At ARJ 2.10, the SFX executable modules are pre-compressed using
       LZEXE.  This may cause false indications with EXE scanning
       programs showing that an ARJ SFX archive is a LZEXE compressed
       file.  Only the executable header module is LZEXE compressed.
       The actual archive is ARJ compressed, of course.  The LZEXE
       header is modified to avoid extraction by UNLZEXE type programs.
       UNLZEXE will truncate an ARJ self-extractor of its archive.

       Both SFX modules have an identification string located in the
       first 1000 characters of the executable.  The identification
       string is "aRJsfX" without the quotes.

       The current commands ARJSFX supports are:

       Usage: ARJSFX [-command] [-switch(s)] [directory\] [file(s)]

       Commands:
       e: Extract files           v: Verbosely list contents
       l: List contents           x: eXtract files with pathname (default)
       t: Test contents

       Switches:
       a: show ANSI comments       n: only New files (not exist)
       c: skip time stamp Check    p: match with Pathname
       f: Freshen existing files   u: Update files (new + newer)
       g: unGarble with password   y: assume Yes on queries

       NOTE!!!  ARJSFX uses the "-" character before all commands and
       switches.  This is to allow extraction of files named e, l, etc.

       The default ARJSFX command is "-x" extract files with pathnames.
       At ARJSFX startup, the self-extracting archive will display any
       archive header comment followed by a query to "Continue
       extraction?".  This query can be suppressed by specifying the
       "-y" option on the command line.

       When extracting pathnames, ARJSFX will prompt for permission to
       create new directories unless the "-y" option is specified.
       ARJSFX will create absolute or relative directories depending
       upon whether the root directory has been stored in the pathname
       in the archive.  Saving the root is done using the "-jf" option.

       To avoid extracting to paths, the archive creator should use the
       "-e" option to exclude path specs.  The user extracting the SFX
       module can specify the "-e" command to extract to the current
       directory.

       ARJSFX does not support compression method 4.

       The ARJSFX module supports the ARJ-SECURITY envelope feature by
       itself.  The ARJ-SECURITY feature is only available as a
       licensed option.  It is intended as a feature for software
       developers.

       ARJ will create a self-extracting module without an intermediate
       archive file.

       Example:  ARJ a software *.* -je

       If you want to make a self-extracting module from an ARJ
       archive, use the freshen command with a non-existent filename
       argument such as "...".  In this case, ARJ will report the
       self-extractor created with 0 file(s).  The 0 file(s) indicates
       that no files were modified during the self-extractor creation.

       Example:  ARJ f software ... -je

       IMPORTANT:  When executing an ARJSFX module on a system with the
       CONSOLE device set to RAW mode, the ARJSFX module will abort on
       user input to avoid hanging the system.  Use of the "-y" switch
       on the command line will avoid the problem.

       Example:  ARJ221 -y

       The ARJSFXJR module created with the "-je1" switch is a
       stripped-down version of ARJSFX.  ARJSFXJR does not accept any
       command line options.  It does not support method 4 or text mode
       "-t1" or garbled "-g" archives.  An ARJSFXJR module containing
       files with pathnames will extract to the paths.  ARJSFXJR will
       automatically create directories as needed to build the paths.

       Example:  ARJ f software ... -je1

       Both the ARJSFX and ARJSFXJR modules will by default extract to
       relative/absolute path specs if the archive contains
       relative/absolute path specs.

       More examples:

       Build an SFX module with absolute pathnames for extraction to
       the absolute pathnames:

       ARJ a -r -je -jf DISTRIB \product\*.*

       The user need only type "DISTRIB -y" to automatically recreate
       the "product" directory on the current drive.

       Build an SFX module with relative pathnames for extraction to
       relative pathnames:

       ARJ a -r -je DISTRIB \product\*.*

       The user need only type "DISTRIB -y" to automatically recreate
       the "product" subdirectory in the current directory.  The user
       can recreate the "product" subdirectory in another directory by
       typing the command "DISTRIB -y directory_name\".

       Build an SFX module with relative pathnames for extraction to
       relative pathnames excluding the base directory:

       ARJ a -r -e1 -je DISTRIB \product\    *.*

       The user need only type "DISTRIB -y" to automatically recreate
       the files and subdirectories of the "product" directory in the
       current directory.

       Build an SFXJR module with filenames (no path specs).

       ARJ a -e -je1 DISTRIB \product\*.*

       The user need only type "DISTRIB" to automatically extract the
       entire contents of "DISTRIB.EXE" to the current directory.

       jf: (afux) store/use Full specified path

       Normally, ARJ will strip all pathnames of drive letter and root
       symbol.  This switch disables this action.  When extracting with
       the "x" command from an archive that was built with this switch,
       ARJ will normally strip any drive letter and root symbol, unless
       the "-jf" option is specified again.

       The "-jf1" option will strip only the drive spec and NOT the root
       symbol.  You can use either the "-jf" or "-jf1" option during
       extraction to force use of the root directory.

       jh: (afu) set Huffman buffer size

       ARJ has a default static Huffman buffer size of 16384 bytes.
       This buffer size is better for compressing executable files.
       The buffer size in ARJ 0.15 and earlier was set to 65500 bytes.
       That size is better for large text files.  You may specify a
       buffer size from 2048 to 65535 bytes.

       Example:  ARJ a archive *.txt -jh65500

       ji: (afu) set Index filename

       The "-ji" switch is used to create an index file containing the
       filenames archived.    This is especially helpful when using ARJ
       to do multiple floppy type archives.  This file SHOULD NOT be
       created on the floppy diskette if the floppy diskette is changed
       during the archival process.

       If the index file already exists, ARJ will append data to it.

       The index file contains two types of text lines.  The first type
       is the volume name record.  It contains the date, time, starting
       file position, and the archive name.  The second type is the
       filename record.  It contains only the filename.

       This information is also useful for restarting "-v" multiple
       volume archives.  You need the filename and the starting file
       position.

       jk: (Upd) Keep temp archive on error

       When the "-jk" switch has been specified, ARJ will keep the
       temporary archive during an aborted archive build/update.  During
       a failed build, ARJ will modify the temporary archive to make it
       useable by removing the broken portion.

       jl: (afuetx) display only filespecs

       The "-jl" option sets ARJ to display only the filespec of a
       filename during the progress displays.  This will simplify the
       display output.

       jm: (afu) set Maximum compression

       The "-jm" switch sets the maximum compression mode.    This mode
       changes both method 1 and method 2 to the maximum compression for
       those methods.  This may increase compression time significantly.

       You can get a 1 to 8 percent improvement in compression with
       ARJ -m1 -jm.

       The "-jm1" option provides slightly less compression than "-jm"
       at a faster speed.  This can range from slightly faster to much
       faster.

       Usage of "-jm" with "-m3" or "-m4" is NOT to be relied on.

       jn: (afu) set restart Name

       The "-jn" switch is used to restart interrupted multiple volume
       archives in conjunction with the "-jx" switch.  All selected files
       are skipped up to but not including the named file.

       Example:  ARJ a volume -v360 -r -jn\BIN\TREE.COM -jx1230

       In the above example, all files scanned up to \BIN\TREE.COM are
       skipped.  Archiving will start at file position 1230 of file
       \BIN\TREE.COM.

       IMPORTANT!!!  The exact name of the starting file must be specified
       according to the wildnames/filespecs specified.  This name is the
       same as displayed by the Adding filename display and the same as
       written to the "-ji" index file.  Please note that \DOS\TREE.COM is
       not considered the same as DOS\TREE.COM with this option.

       jo: (am)  query when updating file

       The "-jo" switch is used to query the user when using the ARJ "a"
       or "m" commands to add files to an archive.    Before ARJ
       overwrites an existing internal archive file when using "-jo",
       ARJ will query the user with "Update <filename>? ".    Without this
       option, ARJ will overwrite the internal archive file without
       querying.

       jp: (lpv) Pause after each screenful

       This switch will cause ARJ to pause after listing each screenful
       of data for the "l", "p", and "v" commands.    Press the ENTER key
       to continue the listing.  You can also enter "quit" to exit ARJ.

       In one special case, "ARJ -? -jp", the use of the -jp switch
       toggles page pauses off, because by default in help mode,
       pausing is on.

       jr: (All) Recover broken archive files

       This switch is used to access headers and files in an archive
       that has been corrupted either with bad data or missing data.
       This switch lets ARJ find the next valid header for listing,
       extraction or testing.  ARJ will continue to look for headers
       until it finds the end of file.  At that point ARJ will print an
       error message stating that it encountered the end of file
       unexpectedly.  This is to be expected.

       If file header data has been corrupted, ARJ will be unable to
       recover any file data associated with that header.  If file data
       has been corrupted, ARJ will abort but not delete any extracted
       file data.  To continue recovering from such a corrupted
       archive, simply specify one filename to extract at a time or use
       the "-q" query switch to prompt for individual files.

       Example:  ARJ e archive -jr -q

       js: (afu) Store archives by suffix

       This switch is used to force ARJ to store and not compress files
       with the following extensions: .ARJ, .ZIP, .LZH, .PAK, .ARC.

       The file extensions can be specified as follows:

       ARJ a archive -js.zoo.ice.gif

       The above command will store files with extensions ending in
       .ZOO, .ICE, and .GIF.  This overrides the defaults.

       You can use the environment variable ARJ_SW to set up your own
       defaults as follows:

       set arj_sw = -js.arj.zip.lzh -js-

       The "-js-" turns off the option by default so that when you
       specify the "-js" switch on the command line, ARJ will already
       know what extensions you want to store.

       jt: (Upd) Test temporary archive

       This switch causes ARJ to execute an archive integrity check on
       the intermediate temporary archive before overwriting any
       pre-existing original archive.  If any error occurs, ARJ will
       not overwrite the original archive.    When used with the "-w"
       switch option, ARJ will also test the final archive file as well
       as the temporary archive before deleting any input files.

       Example:  ARJ m archive *.c -jt

       SUPER PCKWIK may have incompatibility problems with ARJ and
       other software.  See the ARJ KNOWN ISSUES section.

       ju: (All) translate UNIX style paths

       This switch causes ARJ to translate any subsequently encountered
       pathnames to MS-DOS style from UNIX style.  This switch also
       causes translation of filenames entered as a result of ARJ
       prompts such as in comment filenames.

       Example:  ARJ a archive -ju /soft/*.c

       jv: (All) set Verbose display

       This switch sets ARJ to display more information during the
       "t"est, "l"ist, and "ex"tract commands.

       Example:  ARJ t archive -jv

       The "-jv" switch causes the "v" command to display only the
       pathnames to the screen.

       The "-jv1" switch causes the "v" command to display the archive
       data in manner suitable for sorting on various fields.

       The "-jv" switch will set the "p", "s", and "w" commands to
       display IBM graphics characters (128 to 255).

       jw: (ex)  set extract output filename

       The "-jw" option allows you to specify the name of the
       extraction output file.  You should only select one file to
       extract when using this option.

       This is similar but not exactly the same as using the "p"
       command with DOS output redirection.  Using DOS redirection would
       cause all of the output of the extraction to be put into the
       output file.  Using "-jw" would cause ARJ to prompt for
       overwrite permission per each file extracted to the output file.

       jx: (All) start at eXtended position

       This switch is used to continue a file on another archive
       manually.  This switch is normally for use when a multiple
       volume "a" command has aborted.

       Example:  ARJ a arjvol.a01 manual.doc -jx100000

       This example archives manual.doc starting from file byte
       position 100000 and on.

       In extraction mode, this sets ARJ to extract a file to an output
       file at a specified starting position.

       Example:  ARJ e -jx2000000 archive file1

       This example extracts the file "file1" to file1 starting at
       position 2000000 or at the end of the file.

       This is similar to using the command "ARJ p archive >> output".
       To duplicate this redirection with ARJ would require the following:

       ARJ e -jx2000K -jwoutput archive

       jy: (All) set individual Yes flags

       This switch is used to suppress individual ARJ user prompts.

       Syntax:  ARJ e archive -jy<flags>

       where <flags> is one or more of the following characters:
       a, c, d, k, n, o, s, v.  ARJ will assume YES for each flag
       selected.

       A - skip append query during a multi-volume extraction
       C - skip create directory query
       D - skip delete files query
       K - skip disk space availability query
       N - skip new filename prompt
       O - skip overwriting existing file query
       R - erase all typeahead before prompting
       S - skip scanned enough text query
       V - skip ok to proceed to next volume query
       Y - accept single character Y/N/A/Q inputs

       Example:  ARJ x volume -v -jyaco
             suppress append, create, and overwrite prompts.

       You may set the "-jyyr" option in the environment variable
       ARJ_SW.

       jz: (c) supply file for file comment

       The "-jz" switch has been provided to facilitate batch
       commenting of one or more files within an ARJ archive.  Only one
       comment file can be specified.  That file will be used to
       comment each file specified on the command line.

       A comment file containing only a single blank can be used to
       erase comments from ARJ archives.

       Syntax:  arj c archive file1 -jzcomment.txt
            arj c archive file1 -zheader.cmt -jzfile.cmt


     ARJ_SECURITY ENVELOPE:

    The ARJ-SECURITY ENVELOPE feature provides a facility similar to
    other archivers.  This feature disallows any type of modification,
    even commenting, to an ARJ-SECURED archive by ARJ.  Moreover, there
    are additional internal checks to determine if the ARJ-SECURED
    archive has been modified in any way.  This feature is intended for
    use by software developers who distribute their software in
    archived format and is only available for a special fee.  However,
    there can be no guarantee that this mechanism cannot be defeated.

    In normal use, ARJ will display one of two messages when processing
    an archive with a valid ARJ-SECURITY envelope.    ARJ will either
    state that the archive MAY have a valid ARJ-SECURITY envelope or
    that the archive HAS a valid ARJ-SECURITY envelope.  ARJ can only
    be sure that the envelope is valid when the "t", "e", or "x"
    command is executed on ALL of the archived files.  In order to
    fully test the security envelope of an archive, use the "t" command
    as in "ARJ t archive".

    If the security envelope has been tampered with or the archive has
    suffered data corruption, ARJ will display a message stating that
    the security envelope has been violated.


     KNOWN ARJ ISSUES/PROBLEMS:

    When using a working directory, ARJ does not check for disk space
    before overwriting the original archive.  Be sure you have enough
    space before updating an archive using the "-w" switch.

    Because of a bug with extended archive header processing, you
    should convert to ARJ 2.10 and above as soon as practical.  This
    bug is NOT a current problem because no version of ARJ supports the
    use of the extended header.

        WINDOWS 3.0 file I/O is very suspect when using multi-tasking.  A
        number of users have reported that ARJ, LHA, and other archivers
        will occasionally create corrupted archives when running under
        Windows 3.0 with other concurrent tasks.  It is STRONGLY
        recommended that the ARJ option "-jt" always be used when creating
        archives under Windows 3.0.  ARJ "-jt" will verify the archive
        after creating it.

        There is a reported problem using ARJ and floppy disk drives when
    using the disk cache program SUPER PCKWIK 3.30 with advanced
    diskette support (/D+).  The system may occasionally hang when ARJ
    attempts to read/write the diskette.  You may also get CRC or
    Huffman code errors.  Disabling the SUPER PCKWIK option with /D-
    appears to remove this problem.  Other programs have similar
    problems with this feature of SUPER PCKWIK.


     ARJ TECHNICAL SUPPORT:

    I have received many useful suggestions from users all over the
    world.    Many of those suggestions are in this version or will be
    incorporated in later versions of ARJ.

    I will try to resolve software problems with ARJ as they are made
    known to me.  Please notify me of any ARJ problems by mail, email
    or via the ARJ support BBSes mentioned below.  Despite the fact
    that ARJ is free for many users, I will strive to make ARJ a
    robust, stable and useful product for all users.

    I will try to support unregistered users during their evaluation
    period, but I reserve the right to limit support to any
    unregistered user if requests become excessive.  Registered users
    will be eligible to receive technical support by telephone.

    To ensure a reply when using the postal system, please enclose a
    stamped self-addressed envelope with your correspondence.  Keeping
    up with the ARJ mail has become expensive.  Foreign corresponders
    should include currency or postal coupons instead of stamps.
    Otherwise, I may be unable to answer your correspondence.

    Your financial support is needed for the ARJ archiver and format to
    succeed.


     ARJ AVAILABILITY:

    The latest version of ARJ can be obtained from the following
    sources:

    ARJ SUPPORT BBSes:  See ARJ_BBS.DOC

    ARJ is available from a number of other BBSes, but I can only vouch
        for the integrity of the archive if the ARJ222.EXE verifies its
    ARJ-SECURITY envelope as valid.  If no security envelope exists,
    then the data has been re-archived and there is no assurance of
    data integrity.

    If none of the above sources are suitable, you may order a copy of
    the latest version of ARJ directly from the author.

    Send a check or money order for five dollars (US) to cover the
    costs of shipping and handling for U.S. delivery.  For foreign
    delivery, send ten dollars (US) to cover shipping and handling.
    Please specify diskette size (3.5 or 5.25 inch);  otherwise, I
    will ship a 3.5 inch diskette.    Please allow a few weeks for
    delivery, longer for foreign deliveries.

    Robert Jung, 2606 Village Road West, Norwood, Massachusetts 02062


     DISTRIBUTORS:

    The following are authorized distributors for ARJ.  They provide
    local registration and technical support for ARJ.

    In the United Kingdom:

        Chris Pelling                    Compuserve: 100020,2607
    Supreme Computer Peripherals          Phone: [phone]
    84 Heathcote Drive
    East Grinstead
    West Sussex
    RH19 1ND, England


    In Germany:

    C.A.T. Kommunikations-System       Internet: [e-mail]
    Systemberatung A. Dunkel         SubNet: [e-mail]
    Robert-Schuman-Ring 37            FidoNet: 2:243/12
    D 6239 Kriftel, Germany         Mailbox: (06192) 42054 (2400 Baud)
                             (06192) 42057 (19200 PEP)
                        NUA: 45619270055


     ACKNOWLEDGEMENTS:

    LHARC is the name of an archiver by Haruyasu Yoshizaki.
    PKZIP and ZIP are trademarks of PKWare, Inc.
    PAK is trademark of NoGate Consulting.

    I wish to express my gratitude to Haruyasu Yoshizaki (Yoshi) for
    developing LHARC and distributing its source code.  LHARC gave me
    the impetus to start studying data compression.  I also wish to
    thank Haruhiko Okumura for providing additional ideas.    His AR001
    and AR002 program provided the basic design for the early versions
    of ARJ.  Much has happened to the ARJ design since then.  In fact,
    only a small percentage of ARJ is derived from AR source code.    The
    most important part of ARJ, the LZ77 compression routine, is new
    and original.

    I also wish to thank Fabrice BELLARD for LZEXE which is used to
    squish the ARJ SFX modules.

    I wish to thank those who have contributed significantly to the
    development of ARJ.  Those include:

    Soeren Pingel Dalsgaard
    Axel Dunkel
    Jonathan Forbes
    Ron Freimuth
    Brian Godette
    Robb Hufalt
    Arkady Kleyner
    Michael Lawler
    Ken Levitt
    Eberhard Mattes
    Mike McCombs
    Alexander Pruss
    Joseph Teller

    And to the many others who have helped or provided messages of
    support, THANKS!!!

    I wish to thank my wife, Susan, and my son, Timothy, for putting up
    with this ARJ obsession for the past year.  Their encouragement and
    support has been invaluable.

    But my greatest thanks goes to Almighty God for His inspiration and
    great salvation.  For apart from Him, ARJ could not have been done.


     USAGE AND DISTRIBUTION POLICY:

    See LICENSE.DOC file for license policy.


     FINAL COMMENTS:

    I do hope that you find this program as useful as I have.  I would
    appreciate any suggestions to improve this archiver.


    You can reached me at:

    Robert Jung at Channel One BBS        [phone]
    Join the mailbox conference with "j mailbox" to send email to me.

    Robert Jung at Bay State BBS        [phone]

    Robert Jung at The Black Depths BBS [phone]

    Robert Jung at FIDONET address:  1:16/390.7

    Robert Jung in the ARJ echo conference available from the Fidonet
    echo backbone.

    Robert Jung in the RIME/RELAYNET ARJ conference.  The national
    number of the ARJ conference is 275.

    ARJ users are encouraged to use the above echoes to submit
    questions, problems, and new features requests.

    Robert Jung in the COMPRESS (ILINK), LHARC (SMARTNET), or ARCHIVERS
    (RIME/RELAYNET) echo conferences.

    2606 Village Road West
    Norwood, Massachusetts 02062

    Internet address:  [e-mail]

    Compuserve users can enter   >INTERNET: [e-mail]
    at the "Send to" prompt.  I prefer CompuServe users to send mail
    to this address as opposed to my CompuServe userid below.

    CompuServe userid: 72077,445  (Checked once or twice a week)

      End of document