sources\AVP32\DOS cl\FILE_ID.diz (49, 2008-02-05)
sources\AVP32\BSDi daemon\file_id.diz (53, 2008-02-05)
sources\AVZ\FastScript\FILE_ID.DIZ (302, 2008-02-05)
... ...
Copyright (c) 1990-2005 Info-ZIP. All rights reserved.
See the accompanying file LICENSE, version 2005-Feb-10 or later
(the contents of which are also included in zip.h) for terms of use.
If, for some reason, both of these files are missing, the Info-ZIP license
also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html
This is Zip 2.31, a maintenance update for Zip 2.3. Changes include a
few bug fixes for Debian and SourceForge bugs, inclusion of the standard
zip encryption code in the main code, some VMS updates, some changes to
the Win32 projects, and some other bug fixes. We are also working on
the new Zip 3.0 and companion UnZip 6.00 that finally support files and
archives larger than 4 GB on systems that support large files and include
other new features. See the latest betas for details and the new releases
when available.
Zip 2.31 is a compression and file packaging utility. It is compatible with
PKZIP 2.04g (Phil Katz ZIP) for MSDOS systems. There is a companion to zip
called unzip (of course) which you should be able to find the same place
you got zip. See the file 'WHERE' for details on ftp sites and mail
servers.
This version of zip has been ported to a wide array of Unix and other
mainframes, minis, and micros including VMS, OS/2, Minix, MSDOS, Windows NT,
Atari, Amiga, BeOS and VM/CMS. Although highly compatible with PKware's
PKZIP and PKUNZIP utilities of MSDOS fame, our primary objective has been
one of portability and other-than-MSDOS functionality. Features not found
in the PKWare version include creation of zip files in a pipe or on a
device, VMS, BeOS and OS/2 extended file attributes, conversion from Unix to
MSDOS text file format; and, of course, the ability to run on most of your
favorite operating systems. And it's free.
See the file WhatsNew for a summary of new features and the file 'CHANGES' for
a detailed list of all changes.
This version does not support multi-volume archives as in pkzip 2.04g.
This is currently being looked at and may be provided in the release of
Zip 3.0 if time permits.
Please read the file INSTALL for information on how to compile and install
zip, zipsplit, zipcloak, and zipnote. Please read the file MANUAL for
information on how to use them. The file "contents" is a complete list
of the files you should have in this distribution. Also, if you are
using MSDOS, you should read the note on file formats at the end of the
contents file. (The contents file somehow got misplaced apparently in
the Zip 2.3 distribution. If time permits we will create a new one.)
This version supports standard zip encryption. The encryption code was
distributed separately before this version because of US export regulations but
recent relaxing of export restrictions now allow the code to be included. Note
that standard zip encryption is considered weak by today's standards. We are
looking at adding strong encryption to a later release. Decryption can be made
with unzip 5.0p1 or later, or with zipcloak.
All bug reports should go to zip-bugs using the web form at www.info-zip.org,
and suggestions for new features can be sent using the same form (although
we don't promise to use all suggestions). Contact us to send patches as we
currently don't have a standard way to do that. Patches should be sent as
context diffs only (diff -c).
If you're considering a port, please check in with zip-bugs FIRST,
since the code is constantly being updated behind the scenes. We'll
arrange to give you access to the latest source.
If you'd like to keep up to date with our Zip (and companion UnZip utility)
development, join the ranks of BETA testers, add your own thoughts and con-
tributions, etc., send a two-line mail message containing the commands HELP
and LIST (on separate lines in the body of the message, not on the subject
line) to mxserver@lists.wku.edu. You'll receive two messages listing the
various Info-ZIP mailing-list formats which are available (and also various
unrelated lists) and instructions on how to subscribe to one or more of them
(courtesy of Hunter Goatley). (Currently these are all discontinued but
we are considering implementing new versions. However, a discussion
group for Info-ZIP issues is at http://www.quicktopic.com/27/H/V6ZQZ54uKNL
and can be used to discuss issues, request features, and is one place new
betas and releases are announced.)
Frequently asked questions on zip and unzip:
Q. When unzipping I get an error message about "compression method 8".
A. Please get the latest version of unzip. See the file 'WHERE' for details.
Q. I can't extract this zip file that I just downloaded. I get
"zipfile is part of multi-disk archive" or some other message.
A. Please make sure that you made the transfer in binary mode. Check
in particular that your copy has exactly the same size as the original.
Q. When running unzip, I get a message about "End-of-central-directory
signature not found".
A. This usually means that your zip archive is damaged, or that you
have an uncompressed file with the same name in the same directory.
In the first case, it makes more sense to contact the person you
obtained the zip file from rather than the Info-ZIP software
developers, and to make sure that your copy is strictly identical to
the original. In the second case, use "unzip zipfile.zip" instead
of "unzip zipfile", to let unzip know which file is the zip archive
you want to extract.
Q. Why doesn't zip do
just like PKZIP does?
A. Zip is not a PKZIP clone and is not intended to be one. In some
cases we feel PKZIP does not do the right thing (e.g., not
including pathnames by default); in some cases the operating system
itself is responsible (e.g., under Unix it is the shell which
expands wildcards, not zip). Info-ZIP's and PKWARE's zipfiles
are interchangeable, not the programs.
For example, if you are used to the following PKZIP command:
pkzip -rP foo *.c
you must use instead on Unix:
zip -R foo '*.c'
(the singled quotes are needed to let the shell know that it should
not expand the *.c argument but instead pass it on to the program)
Q. Can I distribute zip and unzip sources and/or executables?
A. You may redistribute the latest official distributions without any
modification, without even asking us for permission. You can charge
for the cost of the media (CDROM, diskettes, etc...) and a small copying
fee. If you want to distribute modified versions please contact us at
zip-bugs at www.info-zip.org first. You must not distribute beta versions.
The latest official distributions are on ftp.info-zip.org in directory
/pub/archiving/zip and subdirectories as well as on mirror sites.
Q. Can I use the executables of zip and unzip to distribute my software?
A. Yes, so long as it is made clear in the product documentation that
zip or unzip are not being sold, that the source code is freely
available, and that there are no extra or hidden charges resulting
from its use by or inclusion with the commercial product. Here is
an example of a suitable notice:
NOTE: is packaged on this CD using Info-ZIP's compression
utility. The installation program uses UnZip to read zip files from
the CD. Info-ZIP's software (Zip, UnZip and related utilities) is
free and can be obtained as source code or executables from various
anonymous-ftp sites, including ftp.info-zip.org:/pub/archiving/zip/*.
Q. Can I use the source code of zip and unzip in my commercial application?
A. Yes, so long as you include in your product an acknowledgment and an
offer of the original compression sources for free or for a small
copying fee, and make clear that there are no extra or hidden charges
resulting from the use of the compression code by your product. In other
words, you are allowed to sell only your own work, not ours. If you have
special requirements contact us at zip-bugs at www.info-zip.org.