f0d81ffd1c
which included commits to RCS files with non-trunk default branches. git-svn-id: svn://10.65.10.50/trunk@5403 c028cbd2-c16b-5b4b-a496-9718f37d4682
137 lines
6.6 KiB
Plaintext
Executable File
137 lines
6.6 KiB
Plaintext
Executable File
Copyright (C) 1990-1996 Mark Adler, Richard B. Wales, Jean-loup Gailly,
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Onno van der Linden, Kai Uwe Rommel, Igor Mandrichenko and John Bush.
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Permission is granted to any individual or institution to use, copy, or
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redistribute this software so long as all of the original files are included,
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that it is not sold for profit, and that this copyright notice is retained.
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Zip 2.1 is a compression and file packaging utility. It is compatible with
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PKZIP 2.04g (Phil Katz ZIP) for MSDOS systems. There is a companion to zip
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called unzip (of course) which you should be able to find the same place
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you got zip. See the file 'Where' for details on ftp sites and mail
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servers.
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This version of zip has been ported to a wide array of Unix and other
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mainframes, minis, and micros including VMS, OS/2, Minix, MSDOS, Windows NT,
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Atari, Amiga and VM/CMS. Although highly compatible with PKware's PKZIP and
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PKUNZIP utilities of MSDOS fame, our primary objective has been one of
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portability and other-than-MSDOS functionality. Features not found in the
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PKWare version include creation of zip files in a pipe or on a device, VMS
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and OS/2 extended file attributes, conversion from Unix to MSDOS text file
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format; and, of course, the ability to run on most of your favorite operating
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systems. And it's free.
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See the file 'history' for a detailed list of all changes.
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This version does not support multi-volume archives as in pkzip 2.04g.
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This may be provided in a future version if time permits.
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Please read the file install.doc for information on how to compile and
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install zip, zipsplit and zipnote. Please read the file zip.doc for
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information on how to use them. The file "contents" is a complete
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list of the files you should have in this distribution. Also, if you
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are using MSDOS, you should read the note on file formats at the end
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of the contents file.
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This version supports encryption, but the encryption code is distributed
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separately because of the US export regulations. See the file 'Where'
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for access to the encryption code. Decryption can be made with unzip 5.0p1
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or later, or with zipcloak (which is provided in the encryption supplement).
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All bug reports or patches should go to zip-bugs@wkuvx1.wku.edu, and
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suggestions for new features can be sent to info-zip@wkuvx1.wku.edu
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(although we don't promise to use all suggestions). Patches should be
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sent as context diffs only (diff -c).
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If you're considering a port, please check in with zip-bugs FIRST,
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since the code is constantly being updated behind the scenes. We'll
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arrange to give you access to the latest source.
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If you'd like to keep up to date with our Zip (and companion UnZip utility)
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development, join the ranks of BETA testers, add your own thoughts and con-
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tributions, etc., send a two-line mail message containing the commands HELP
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and LIST (on separate lines in the body of the message, not on the subject
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line) to mxserver@wkuvx1.wku.edu. You'll receive two messages listing the
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various Info-ZIP mailing-list formats which are available (and also various
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unrelated lists) and instructions on how to subscribe to one or more of them
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(courtesy of Hunter Goatley).
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Frequently asked questions on zip and unzip:
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Q. When unzipping I get an error message about "compression method 8".
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A. Please get the latest version of unzip. See the file Where for details.
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Q. I can't extract this zip file that I just downloaded. I get
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"zipfile is part of multi-disk archive" or some other message.
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A. Please make sure that you made the transfer in binary mode. Check
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in particular that your copy has exactly the same size as the original.
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Q. When running unzip, I get a message about "End-of-central-directory
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signature not found".
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A. This usually means that your zip archive is damaged, or that you
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have an uncompressed file with the same name in the same directory.
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In the first case, it makes more sense to contact the person you
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obtained the zip file from rather than the Info-Zip software
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developers, and to make sure that your copy is strictly identical to
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the original. In the second case, use "unzip zipfile.zip" instead
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of "unzip zipfile", to let unzip know which file is the zip archive
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you want to extract.
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Q. Why doesn't zip do <something> just like PKZIP does?
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A. Zip is not a PKZIP clone and is not intended to be one. In some
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cases we feel PKZIP does not do the right thing (e.g., not
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including pathnames by default); in some cases the operating system
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itself is responsible (e.g., under Unix it is the shell which
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expands wildcards, not zip). Info-ZIP's and PKWARE's zipfiles
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are interchangeable, not the programs.
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For example, if you are used to the following PKZIP command:
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pkzip -rP foo *.c
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you must use instead on Unix:
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zip -r foo . -i \*.c
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(PKZIP does not allow recursion in directories other than the
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current one. zip does, this is why the syntax is different.)
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Q. Can I distribute zip and unzip sources and/or executables?
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A. You may redistribute the latest official distributions without any
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modification, without even asking us for permission. You can charge
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for the cost of the media (CDROM, diskettes, etc...) and a small copying
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fee. If you want to distribute modified versions please contact us at
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zip-bugs@wkuvx1.wku.edu first. You must not distribute beta versions.
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The latest official distributions are always on ftp.uu.net in directory
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/pub/archiving/zip and subdirectories.
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Q. Can I use the executables of zip and unzip to distribute my software?
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A. Yes, so long as it is made clear in the product documentation that
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zip or unzip are not being sold, that the source code is freely
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available, and that there are no extra or hidden charges resulting
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from its use by or inclusion with the commercial product. Here is
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an example of a suitable notice:
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NOTE: <Product> is packaged on this CD using Info-ZIP's compression
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utility. The installation program uses UnZip to read zip files from
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the CD. Info-ZIP's software (Zip, UnZip and related utilities) is
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free and can be obtained as source code or executables from various
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anonymous-ftp sites, including ftp.uu.net:/pub/archiving/zip/*.
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Q. Can I use the source code of zip and unzip in my commercial application?
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A. Yes, so long as you include in your product an acknowledgment and an
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offer of the original compression sources for free or for a small
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copying fee, and make clear that there are no extra or hidden charges
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resulting from the use of the compression code by your product. In other
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words, you are allowed to sell only your own work, not ours. If you have
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special requirements contact us at zip-bugs@wkuvx1.wku.edu.
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