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-
- UPDATE.DOC, ARJ 2.41 April 1993
-
-
- This documents new or updated information since ARJ 2.30.
-
-
- ** IMPORTANT NEWS ****************************************************
-
- The main changes to this release compared to ARJ 2.30 are faster
- compression speed, a better security envelope, and improved
- backup usage features. There is a very slight improvement in
- compression size. For some users, there is a noticeable
- improvement in processing speed with diskette based archives.
-
- ARJ uses a NEW SECURITY ENVELOPE scheme. This version does NOT
- recognize the previous envelope scheme nor will ARJ 2.39b and
- before recognize the new security envelope scheme. This is
- INTENTIONAL as there exist hacks of the previous ARJ security
- envelope. You can use a previous version of ARJ to verify older
- envelopes.
-
- The previous ARJ-SECURITY codes do not work with this new
- version. New codes and software will be mailed to ALL old and
- new ARJ-SECURITY customers within weeks of this release.
-
- The ARJ listfile feature (!listfile) has a new option "-hl" to
- display included filenames that cannot be found on the disk and
- to subsequently return a non-zero errorlevel.
-
- The "-he" option from ARJ 2.39b has changed function.
-
- Software developers of programs which support the ARJ format
- should take note of the following two changes.
-
- The self-extractor modules have been changed significantly. The
- standard ARJSFX module is 15K bytes in size. A larger 17K
- ARJSFX module supports ARJ-SECURITY. The main ARJ header no
- longer follows immediately after the EXE module.
-
- Various fields in the ARJ main header have been defined for use
- at 2.39 and above.
-
- The large ARJSFX module will NOT prompt for permission to
- continue the extraction if the "-e", "-x" or "-y" arguments have
- been specified.
-
- The small ARJSFXJR module will count the skipping of files that
- already exist as minor errors. This ARJSFXJR skipping will
- generate a DOS errorlevel of 1, while other errors will generate
- a DOS errorlevel of 2. However, with the new "-n" command line
- option, ARJSFXJR will not count skips as an error. The ARJSFXJR
- module now supports command line options.
-
- To prevent novices from using ARJ to update a multiple volume
- archive, ARJ will not allow a multiple volume update unless the
- new "-hu" option has been specified. Only multiple volume experts
- should try updating these type of archives.
-
- The "-y" option no longers suppresses the multiple volume prompt
- when the volume resides on a removable media drive such as a
- diskette drive. You can suppress the volume prompt with "-jyv".
-
- The processing of "-jy" and "-v" switch options have been
- improved to be consistent with other switch processing.
-
- The ARJ yes/no query prompts have been changed to have a local
- and a global effect. See the USER PROMPTS section below.
-
- A new user prompt has been added just before asking for a new
- filename during extraction when not overwriting.
-
- Whenever archiving to diskettes, it is HIGHLY recommended that the
- option "-jt" be used. This helps spot BAD diskettes or BAD
- diskette drives. It is HIGHLY recommended that the "-jt" option
- be used in a multi-tasking or network environment.
-
- The command "ARJ e -d archive *.*" will now prompt for permission
- to complete the deletion.
-
- Unless the "-jr" (recover) switch is used, ARJ will delete any file
- extracted with a CRC or Bad file data error.
-
- The "m" (move) command and "-d" option will NOW delete directories
- selected with the "-a1" option.
-
- UNERASE or UNDELETE commands do not always recover a file
- correctly. This will result in damaged archives. This is true
- for all archive types. You should always test an archive after
- unerasing it.
-
- If you use the software disk cache, HYPERDISK, see the KNOWN ARJ
- ISSUES section in ARJ.DOC for important information.
-
- **********************************************************************
-
-
- USER PROMPTS
-
- The ARJ user prompts have been improved to provide more
- flexibility. In addition to the normal yes and no responses, ARJ
- also accepts the following responses: quit, always, skip, global,
- and command.
-
- "Global" sets ARJ to inhibit all subsequent user prompts by assuming
- YES for all queries as if "-y" were specified.
-
- The "Always" response has changed. It now sets ARJ to assume YES
- for subsequent queries of the same class. For example, answering
- YES to the overwrite query will assume YES for ALL subsequent
- overwrite queries.
-
- "Skip" sets ARJ to assume NO for ALL subsequent queries of the same
- class.
-
- Subsequent user prompt messages will still be output to the screen
- after the "always" and "skip" responses but no user response will be
- accepted.
-
- "Command" prompts for one DOS command and then executes it. ARJ
- then returns to expect an answer to the current yes/no query. You
- should keep the query in mind as ARJ does NOT always redisplay
- the full query message.
-
-
- ARJ ERROR LEVELS
-
- ARJ will now return a DOS errorlevel of 9 when trying to process a
- file that is NOT an ARJ archive.
-
- With the new option "-hl", ARJ will return a non-zero errorlevel
- when a user specified filename from within an ARJ listfile cannot
- be found on disk. Ordinarily, ARJ returns no error for such a
- situation.
-
-
- ARJ ARCHIVE NAME WILDCARDING
-
- ARJ allows the wildcarding of the archive parameter for ARJ
- commands other than the add commands (a, f, j, m, u). If the "-r"
- option is specified, ARJ will scan through subdirectories looking
- for ARJ archives to process.
-
- This feature allows a user to delete a specific file from a series
- of archives.
-
- Example: ARJ d *.ARJ bbs.ad
-
- This feature could also be used to extract a series of archives.
-
- Example: ARJ e *.ARJ
-
-
- ARJ COMMAND LINE PROCESSING
-
- The option "-x-" will now ignore any previous "-xfilename" options.
-
-
- ARJSFX COMMAND LINE PROCESSING
-
- The larger ARJ self-extractor (-je) supports the new command line
- option "-s" to allow the skipping of the ARJ-SECURITY envelope
- verification test if an envelope exists.
-
-
- ARJSFXJR COMMAND LINE PROCESSING
-
- The small ARJ self-extractor (-je1) supports command line
- options.
-
- ARJSFXJR [-switch(es)] [drive:][target_dir\]
-
- switches:
- n: set ARJSFXJR to NOT count as an error the skipping of files
- o: set ARJSFXJR to overwrite existing files
-
- You can specify a target_directory or drive or both. However,
- you must specify the ending "\" or ":" symbol.
-
- ARJSFXJR -o C:\SOFT\ -> self-extract into directory "C:\SOFT\"
- in overwrite mode.
-
-
- ARJ COMMANDS
-
- "a" command
-
- When adding files that replace files in an archive, ARJ will now
- display a "Replacing " message to indicate an overwrite.
-
-
- "e" and "x" commands
-
- When overwriting a file, ARJ will display file size and date-time
- information concerning the ARJ file and the DISK file.
-
-
- "p" command
-
- When using the ARJ "p" command to redirect output to a viewer
- program such as "LIST", ARJ will now set the date-time stamp of
- the intermediate temporary file to the date of the archived file
- as opposed to the current date and time.
-
-
- ARJ SWITCHES
-
- "-b3" switch
-
- The "-b3" switch is used to reset the archive bits of files being
- extracted. It is useful for setting the archive state so that a
- subsequent incremental backup will not backup these extracted
- files.
-
-
- "-d" switch
-
- The "-d" switch when used during extraction with the wildcard "*.*"
- will prompt the user for permission to delete the files. This
- prompt can be suppressed with the "-y" or "-jyd" options.
-
-
- "-i2" switch
-
- The "-i2" switch sets ARJ to display a combined percentage and
- bar progress display.
-
-
- "-m" switch
-
- The "-m1" and "-m2" compression methods have been modified to
- improve the compression ratios.
-
-
- "-od" switch
-
- The "-od" switch sets ARJ to select files no older than the
- specified number of days. The days are calculated from midnight.
-
- Examples: ARJ a archive -od0 select files modified today
- ARJ a archive -od1 select files modified yesterday
- and today
-
-
- "-v" switch
-
- When the multiple volume ARJ files to be used are located on drives
- with removable media (diskette drives, etc.), ARJ will ALWAYS
- PROMPT for the next diskette even with the "-y" option specified.
- However, you can suppress the next volume prompt with the "-jyv"
- option. At DOS versions before 3.0, only drives A and B are
- considered removable.
-
- After the pause to change diskettes, ARJ will check to make sure
- that the diskette has been changed. However, this check is limited
- to 3 retries for the same volume.
-
- ARJ will not allow the updating of multiple volume archives unless
- the "-hu" option is specified.
-
- The "r" modifier allows the reservation of disk space on the first
- volume. The number after the "r" specifies the space to reserve.
- This is useful for software installation volumes built on the hard
- disk.
-
- Example: ARJ a install -v360r50K make first volume 50000 bytes
- smaller than 360K.
-
- Example: ARJ u archive -v360u
-
- The "z" modifier works like the "s" modifier except that the system
- command is NOT echoed to the screen.
-
- The "-v" switch now accepts its modifiers in any order. The "s"
- and "z" modifiers must be last because any succeeding text is
- considered the system command to execute.
-
- Examples: ARJ a volume -vavw beep, autosize, whole files
- ARJ a volume -vavsDIR beep, autosize, execute DIR
-
-
- "-w" switch
-
- When using the "-w" switch while archiving to multiple volumes, ARJ
- will check the available disk space in the work directory. If
- there is not enough space, ARJ will prompt for permission to
- continue. This prompt can be suppressed with the "-y" and "-jyd"
- switches.
-
-
- "-y" switch
-
- The "-y" switch will no longer suppress the "-v" next volume prompt
- when the archive is located on a drive with removable media such as
- a diskette drive.
-
-
- "-ja1" switch
-
- The "-ja1" switch will suppress the display of the archive comment.
-
-
- "-jn" switch
-
- The "-jn" switch is used to restart a multiple volume archive. The
- index file created by the "-ji" switch at ARJ 2.39 and above can be
- used to facilitate restarting. Please note that index files
- created by older versions of ARJ will not work with this restart
- method. This method uses the "-jn" syntax without a filename. The
- previously written index file is scanned to determine the restart
- information.
-
- To use this method of restarting, you must specify the "-ji" switch
- to build an index file while archiving to multiple volumes. To
- restart an interrupted sequence, simply specify the EXACT SAME
- command line as before and add "-jn". ARJ will determine the
- archive name, the restart filename, and the restart file position.
-
- Example: ARJ a a:volume -va c:\*.* -r -jiINDEX.FIL
- ARJ a a:volume -va c:\*.* -r -jiINDEX.FIL -jn
-
-
- "-jp" switch
-
- The "-jp" switch will be ignored if the ARJ output has been
- redirected as in "ARJ l archive -jp > dump".
-
-
- "-jr" switch
-
- The "end of file" error message will no longer be displayed when
- using the "-jr" option on a valid ARJ archive.
-
-
- "-jr1" switch
-
- The "-jr1" switch should be used when "-jr" switch usage cannot
- access some files in a damaged archive because of a premature end
- of archive marker.
-
-
- "-jy" switch
-
- The "-jy" switch options are now parsed like other switches with
- regard to toggling and the "+/-" modifiers. You can also specify
- multiple occurrences of the "-jy" options.
-
- Examples: -jyo -jyo evaluates to no change
- -jyo -jyo+ evaluates to suppress overwrite prompt
- -jyo+c+y+ evaluates to suppress overwrite and create
- prompts and use single key input mode
-
-
- "-ha" switch
-
- The "-ha" switch sets ARJ to reset the attributes of a file to be
- overwritten or a file to be deleted. This allows the overwrite or
- delete operation to proceed.
-
- A slight performance degradation may result from using this option.
-
- Examples: ARJ e archive -ha
- ARJ m archive -ha dir\*.*
-
-
- "-hc" switch
-
- The "-hc" switch sets ARJ to execute a DOS command at the start of
- the execution of ARJ immediately after the command line switch
- options have been processed, but before the wildcard search is
- started. This can be used to clear the screen to hide the command
- line or to provide a pause option to allow swapping diskettes.
-
- Examples: ARJ a -hcCLS archive -gpassword
- ARJ a -hcPAUSE archive *.*
-
-
- "-he" switch
-
- The "-he" switch sets ARJ to skip the verification procedure when
- accessing an ARJ-SECURED ARJ archive. This verification procedure
- is time consuming and need only be done once to be sure of the
- integrity of the archive.
-
-
- "-he1" switch
-
- The "-he" switch sets ARJ to abort with an error code of 4 when
- processing a possibly ARJ-SECURED archive. This is useful as a
- REARJ.CFG option for ARJ. This will prevent REARJ from converting
- an ARJ-SECURED archive to the same or another format.
-
- Examples: ARJ l secured.arj -he1
-
-
- "-hi" switch
-
- The "-hi" switch when used with the "-ji" switch sets ARJ to
- include the file date-time stamp, the original file size, the
- compressed file size, the compression ratio, and the filename in
- the index file.
-
- Example: ARJ a a:backup c:\*.* -r -va -jiINDEX -hi
-
-
- "-hl" switch
-
- The "-hl" switch sets ARJ to report the "file not found" type of
- errors when processing the filenames in an ARJ listfile during an
- "add" type command (a, f, m, u). ARJ will subsequently return a
- non-zero DOS errorlevel when such an error has been found.
- Previous versions of ARJ ignored these types of errors.
-
- Example: ARJ a a:backup !listfile -va -hl
-
-
- "-hs" switch
-
- The "-hs" switch sets ARJ to disable its file sharing support.
- This may be necessary for some unusual applications.
-
-
- "-hu" switch
-
- The "-hu" switch sets ARJ to allow the updating of multiple volume
- archives. At this revision, by default, ARJ does not allow
- updating of multiple volume archives because of the possibility of
- losing data.
-
- Example: ARJ c archive -hu -zcomment.txt
-
-
- "-hw" switch
-
- The "-hw" switch sets the ARJ w command to display the
- "Searching ..." filenames messages in a scroll saving format.
- Filenames of files that do not contain string matches will be
- overwritten on the screen.
-
- The "-hw1" switch sets the ARJ w command to ONLY display the
- "Searching ..." filenames messages for files that contain string
- messages.
-
-
- "-hx" switch
-
- The "-hx" switch allows the user to specify what the default file
- extension or extensions that are to be used by ARJ to access
- archive names that are not specified with file extensions. ARJ
- will assume that the first extension specified will be the main
- default extension.
-
- Examples: ARJ a archive *.* -hx.SDN assumes default .SDN
- file extension
- ARJ l archive -hx.SDN.ARJ looks for archive.SDN and
- if not found, then looks
- for archive.ARJ
-
-
- end document
-
-