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- File README for:
-
- unzip42.zip generic Unix/VMS/OS2/MSDOS/Mac/Amiga/Atari UnZip v4.2
- unzip42.zoo same as above, but ZOO format
- unzip42.arc same as above, but ARC format
- unzip42.tar.Z same as above, but compressed tar format
-
- A public distribution version of the Info-ZIP project's generic UnZip
- utility; 20 March 1992.
- __________________________________________________________________________
-
- BEFORE YOU ASK: UnZip and its companion Zip utility can be found on many
- archive sites around the world. The "archie" ftp database utility can be
- used to find a site near you (if you don't know how to use it, DON'T ASK
- US--check the Usenet groups news.newusers.questions or news.answers or some
- such). The "official" Info-ZIP ftp site is valeria.cs.ucla.edu in /pub.
- The most heavily used US site is wuarchive.wustl.edu; Zip 1.0 can be found
- in /packages/compression/zip-1.0-export.tar.Z, and UnZip will probably be
- found in the same place. Zip 1.0 is also at any comp.sources.misc archive
- site (volume 23) and, due to an oversight, in comp.sources.unix archives,
- too (most recent volume--24?). Machine-specific archives and executables
- for both Zip and UnZip may be stored at wuarchive in /mirrors/misc/unix,
- /mirrors/misc/vaxvms, /mirrors/msdos/zip, etc. See the bottom of Contents
- for locations of the decryption routines for Zip and UnZip. The interna-
- tional sites listed there (and US mirrors thereof) will most likely have
- the rest of the Zip and UnZip packages, as well.
- __________________________________________________________________________
-
-
- This version of UnZip has been ported to a wide array of Unix and other
- mainframes, minis, and micros (including VMS, OS/2, Minix, MSDOS, Amiga,
- Atari ST (kinda), and Macintosh). Although highly compatible with Phil
- Katz's PKZIP and PKUNZIP utilities of MSDOS fame, our objective has been
- one of portability and other-than-MSDOS functionality. Features not found
- in the PKWare version include default extraction of directory trees (with
- a switch to defeat this, rather than the other way around); HPFS awareness
- for the OS/2 version; and, of course, the ability to run on most of your
- favorite operating systems.
-
- New features in this version are detailed in the History file, but a
- couple of them are worth comment. Decryption (to accompany Zip 1.0's
- encryption) is now supported (you still have to ftp the crypt.c source
- separately, but that's explained in the Contents file). It is a recent
- addition, however, and there may be some rough edges in the compilation.
- If it fails, try adding (or removing) -DTERMIO to the compiler command.
- (This is especially likely on System V machines--the error messages will
- say things about sgtty being undefined in file_io.c.) Once you get it
- to compile, everything should work well; it's only the compilation itself
- which may be a problem. (The one known exception is for Crays; there is
- a bug in crypt.c 1.0. A small patch [cray.dif] is included with UnZip
- 4.2. The patch is unnecessary for later versions of crypt.c.) Decryption
- is optional, of course, and there should be virtually no problems compil-
- ing the export (non-decryption) version of UnZip.
-
- Ship is also now included with the UnZip distribution. It first appeared
- with Zip 1.0 and is the preferred method for mailing binaries to and from
- Info-ZIP. As it was added at the last minute, however, there are only
- makefile targets in the main Makefile (for regular Unix, SysV, OS/2 and
- MS-DOS). Most people will already have Ship compiled with the Zip dis-
- tribution, so this shouldn't be a big problem. Ship is likely to disap-
- pear again in the next release (it should be separately distributed by
- then).
-
- The new compression method in PKZIP 1.93a (deflation) is NOT supported
- yet and won't be until PKZIP 2.0 (or whatever) is officially released.
- PKZ193A.EXE is a beta version of the software, and its compression format
- may change before the official release. We'll be ready when it does come
- out, however.... :-)
-
- See unzip.1 or unzip.man for usage. (No, there isn't a manual, per se.
- Dave Heiland is working on one, but it's a big job and he isn't done
- yet.) See Contents for an explanation of everything in the distribution,
- and BUGS for a list of what still doesn't work. The History file lists
- what *did* get fixed and added this time; CONTRIBS lists who did it (not
- complete, but we're trying); and COPYING contains information on commer-
- cial usage, licensing, etc. Basically such usage is prohibited at present,
- but we're working on lifting that restriction. So don't bug us unless you
- have (legally) rewritten some or all of the code in question (check with
- us first, however, since we're also working on that as time permits).
-
- See the Makefile (or the system-specific archives) for details on how to
- compile for your system. If you confirm a clean compile and execution
- on a unique system (i.e., one different from those in the makefiles),
- please provide Info-ZIP via e-mail with details as to your system type,
- any changes required, what Makefile system was used, etc.
-
- If any changes are made to source, we'd appreciate them (context diff
- files only, please), with explanation as appropriate.
-
- All bug reports and patches should go to zip-bugs@cs.ucla.edu, and sug-
- gestions for new features can be sent to info-zip@cs.ucla.edu (although
- we don't promise to use all suggestions). If it's something which is
- manifestly useful, sending the required patches to zip-bugs directly is
- likely to produce a quicker response than asking us to do it. Those
- directly responsible for updating the code are somewhat short on time
- these days. If you're considering a port, however, please check in with
- Info-ZIP FIRST, since the code is constantly being updated behind the
- scenes. We'll arrange to send you the latest source. The alternative
- is the possibility that your hard work will be tucked away in a sub-
- archive and pretty much ignored.
-
- Please don't send e-mail to me (I'm only the Coordinator), unless
- you're requesting something special (e.g., a copy of the "No Feelthy ..."
- rules for source and change submission).
-
- If you'd like to keep up to date with our UnZip (and companion Zip
- utility) development, join the ranks of BETA testers, add your own
- thoughts and contributions, etc., send your request to
-
- Info-ZIP-Request@cs.ucla.edu
-
- and Rich Wales'll add you to the Info-ZIP newsletter mailing list.
-
- David Kirschbaum
- Info-ZIP Coordinator
-
- (with some additions by Cavum Newtus)
-