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OZF: Old Zip Finder v1.00

(c) Copyright 1989 Tim Rossiter

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When Phil Katz released PKZIP 1.01, he introduced a new compression
algorithm: "imploding". Since implosion is almost always better than
the old algorithm ("reducing"), reducing is now obsolete. Another
advantage to using the new release is that PKZIP 1.01's default
compression minimizes ZIP size; the older versions use "shrinking"
unless told not to. Shrinking is a faster compression method, but it
does not compress as effectively.

PKZIP 1.01 includes a handy utility called REZIP which painlessly
unzips a zipfile and REZIPs it using the new imploding method. REZIP
works very well, but I am the sysop of an active BBS; I am always
receiving zipfiles that were compressed with the older version. BBS
users who download many files probably have the same problem. I did
not want to have to REZIP my upload directories every day to ensure
that my files are as small as possible. I wanted to be able to
quickly identify old zipfiles on my hard drive and REZIP only those
files.

OZF (Old Zip Finder) is a utility that does just that.



Usage: OZF [-v] zipfile
-v = View listing of files within zipfile
zipfile = ZIP file name, wildcards *,? ok. Default
extension is .ZIP

If you use the -v parameter, OZF will display each zipfile's name
along with a list of the files it contains, the length of the files
and the compression method used. OZF will mark individual files
within the zipfile that need REZIPping with an asterisk (*) in the
left hand column.

OZF automatically searches all zipfiles specified and displays a
"REZIP D:\PATH\ZIPFILE" message for each file that needs REZIPping.
If no files need REZIPping, nothing will be displayed. This output
can conveniently be redirected to a batch file. You can then inspect
the newly created batch file and run it to REZIP the old version
zipfiles. To create a batch file that will REZIP all old zipfiles in
the current directory, use the command:

OZF * > rezipall.bat

This will create the file REZIPALL.BAT. When you run this batch file,
the REZIPping will begin. If no files need REZIPping, the batch file
will be empty.









I have included the batch file OZFALL.BAT with OZF. This batch file
contains one command:

OZF * >> \rezipall.bat

This command is similar to the above command, except that it creates
the REZIPALL.BAT file in the root directory of the current drive, and
will not delete REZIPALL.BAT if it already exists. If you use it in
conjunction with the popular public domain utility SWEEP, OZFALL.BAT
will run OZF in all directories of a hard drive and make one master
REZIPALL.BAT file for the entire drive. Simply run:

SWEEP OZFALL

Once you run the REZIPALL.BAT file that is created, be sure to delete
it to prevent re-REZIPping any files.



My thanks go to Phil Katz, author of PKZIP, and Thomas Atkinson,
author of REZIP, for creating these utilities that benefit the entire
BBS community. Please support these authors by registering their
products.



DISCLAIMER
==========

UNDER NO CIRCUMSTANCES WILL THE AUTHOR OF THIS PROGRAM BE LIABLE TO
ANYONE FOR ANY DAMAGES (INCLUDING ANY LOST PROFITS, LOST SAVINGS OR
OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES) STEMMING FROM THE USE, MIS-
USE OR INABILITY TO USE THIS PROGRAM, OR FOR ANY CLAIM BY ANY OTHER
PARTY.



If you feel that OZF is a useful utility and plan to use it beyond a
trial period, payment would be greatly appreciated. I have not tried
to "rig" this utility to persuade you to register it, so I hope that
everyone who uses it will reciprocate in kind. I will make further
enhancements to the program if it generates any interest. Send
payments of $5 or more to:

Tim Rossiter
990 Valley Belt
Cleveland, Ohio 44131

Tim Rossiter can be reached via BBS for questions, bugs, or
suggestions. Call FLIP FLOP at (216)721-8523.



PKZIP is copyright 1989 PKWARE, Inc.