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RBBS in a Box Volume 1 #2
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PKZIPFIX.DOC
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1989-02-23
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OverView February 23, 1989
--------- -----------------
The .ZIP file format was designed for high reliability, using 4-byte
signatures for all file headers, and redundant distributed & centralized
directory structures.
PKZIPFIX is a simple utility that takes advantage of the extra
reliability of the .ZIP file format to reconstruct truncated or damaged
.ZIP files.
PKZIPFIX however can not create good data out of bad data! If a portion
of a .ZIP file has been corrupted, PKZIPFIX will allow recovery of the
unaffected files. Depending on how badly damaged the .ZIP file is how-
ever, one or more files may still extract with errors.
Usage
-----
PKZIPFIX should be used when PKZIP or PKUNZIP inidcate that a .ZIP file
is in error, or a .ZIP file has become damaged. PKZIPFIX can also be
used to extract the .ZIP file portion from a PKSFX (R) self-extracting
file.
PKZIPFIX Syntax
---------------
PKZIPFIX ZipFile
Where ZipFile is the name of the file to be recovered. An extension of
.ZIP will be used by default. PKZIPFIX will attempt to recover ZipFile
and will create a file called PKFIXED.ZIP which contains the reconstruc-
ted .ZIP file.
The file PKFIXED.ZIP can then be extracted or listed with PKUNZIP. It
is strongly recommended that you then use PKZIP to create a new .ZIP
file from the files that are extracted from PKFIXED.ZIP.
License
-------
You are free to use, copy and distribute PKZIPFIX for NONCOMMERCIAL use
if:
No fee is charged for use, copying or distribution.
It is not modified in any way.
Clubs and user groups may charge a nominal fee not to exceed ($10) for
expenses and handling while distributing PKZIPFIX.
Disclaimer
----------
PKWARE hereby disclaims all warranties relating to this software,
whether express or implied, including without limitation any implied
warranties of merchantability or fitness for a particular purpose.
PKWARE will not be liable for any special, incidental, consequential,
indirect or similar damages due to loss of data or any other reason,
even if PKWARE or an agent of PKWARE has been advised of the possibility
of such damages. In no event shall PKWARE's liability for any damages
ever exceed the price paid for the license to use software, regardless
of the form of the claim. The person using the software bears all risk
as to the quality and performance of the software.
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