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1.1 ! root 1: Copyright (C) 1990-1992 Mark Adler, Richard B. Wales, Jean-loup Gailly, ! 2: Kai Uwe Rommel and Igor Mandrichenko. ! 3: Permission is granted to any individual or institution to use, copy, or ! 4: redistribute this software so long as all of the original files are included ! 5: unmodified, that it is not sold for profit, and that this copyright notice ! 6: is retained. ! 7: ! 8: ! 9: Zip 1.9 is a compression and file packaging utility. It is analogous to a ! 10: combination of tar and compress and is compatible with PKZIP 1.93a ! 11: (Phil Katz ZIP) for MSDOS systems. There is a companion to zip called ! 12: unzip (of course) which you should be able to find the same place you ! 13: got zip. (See the file 'where' for details on ftp sites and mail ! 14: servers.) ! 15: ! 16: This version of zip has been ported to a wide array of Unix and other ! 17: mainframes, minis, and micros including VMS, OS/2, Minix, MSDOS, ! 18: Windows NT, Atari, and Macintosh (the latter two have not been tested ! 19: recently). Although highly compatible with PKware's PKZIP and PKUNZIP ! 20: utilities of MSDOS fame, our primary objective has been one of ! 21: portability and other-than-MSDOS functionality. Features not found in ! 22: the PKWare version include creation of zip files in a pipe or on a ! 23: device, VMS and OS/2 extended file attributes, conversion from Unix to ! 24: MSDOS text file format; and, of course, the ability to run on most of ! 25: your favorite operating systems. And it's free. ! 26: ! 27: If you got this file from zip19.zip, you can extract the rest only ! 28: with unzip 5.0 or pkzip 1.93a. See the file 'Where' if you do not ! 29: have them already. ! 30: ! 31: Please read the file install.doc for information on how to compile and ! 32: install zip, zipsplit and zipnote. Please read the file zip.doc for ! 33: information on how to use them. The file "contents" is a complete ! 34: list of the files you should have in this distribution. Also, if you ! 35: are using MSDOS, you should read the note on file formats at the end ! 36: of the contents file. ! 37: ! 38: This version supports encryption, but the encryption code is distributed ! 39: separately because of the US export regulations. See the file 'Where' ! 40: for access to the encryption code. Decryption can be made with unzip 5.0 ! 41: or later, or with zipcloak (which is provided in the encryption supplement). ! 42: ! 43: All bug reports and patches should go to [email protected], and ! 44: suggestions for new features can be sent to [email protected] ! 45: (although we don't promise to use all suggestions). Patches should be ! 46: sent as context diffs only (diff -c). ! 47: ! 48: If you're considering a port, please check in with zip-bugs FIRST, ! 49: since the code is constantly being updated behind the scenes. We'll ! 50: arrange to give you access to the latest source. The alternative is the ! 51: possibility that your hard work will be tucked away in a sub-archive ! 52: and pretty much ignored. A port to VM/CMS would be welcome. ! 53: ! 54: If you'd like to keep up to date with our zip (and companion unzip utility) ! 55: development, join the ranks of BETA testers, add your own thoughts and ! 56: contributions, etc., send your request to [email protected] and ! 57: you will be added to the Info-ZIP newsletter mailing list. ! 58: ! 59: ! 60: IMPORTANT NOTES: ! 61: ! 62: - pkzip 1.93a is only an alpha version (see historical notes below). If ! 63: you wish to create zip files compatible with the official version of ! 64: pkzip (1.10), you must use zip 1.0. zip 1.9 cannot create files ! 65: with the old compression method (implosion). ! 66: ! 67: - zip 1.9 is is compatible with pkzip 1.93a, except when two features ! 68: are used: encryption or zip file created in a pipe or on a non ! 69: seekable device. pkzip versions of 2.0 will support such files, and ! 70: unzip 5.0 already supports them. (Thanks to Phil Katz for accepting ! 71: our suggested minor changes to the zip file format.) ! 72: ! 73: - the ports to the Macintosh and the Atari ST have been provided in ! 74: the hope that they can be useful, but they have been adapted from an ! 75: older version of zip (1.0) and are still completely untested. A ! 76: makefile is still missing for the Mac. Another Macintosh port is ! 77: being made by Johnny Lee <[email protected]> but it requires ! 78: more substantial changes so it will be distributed separately. ! 79: ! 80: - Please read the file zip.doc, and in particular its list of known bugs ! 81: at the end. ! 82: ! 83: Historical notes: ! 84: ! 85: At the time of release of zip 1.9, the official released version of ! 86: PKZIP is version 1.10. PKZIP 1.93a is only an alpha version, which was ! 87: released in October 1991. It was supposed to be replaced soon after ! 88: with an official release of pkzip 2.0. However, Phil Katz has not yet ! 89: announced a release date at the time of writing (Aug 19th, 1992). ! 90: ! 91: Beta versions of zip compatible with pkzip 1.93a have been available ! 92: since February 1992 to the info-zip group (see the file 'history'). ! 93: The zip authors would have preferred to release zip 2.0 only after ! 94: pkzip 2.0(*), to ensure full compatibility in case of archive format ! 95: changes between pkzip 1.93a and 2.0. However we feel that we cannot ! 96: delay any further the release of zip 1.9, since all the major features ! 97: that we wanted to put in are now available and well tested by the ! 98: info-zip group. ! 99: ! 100: (*) The version number for the new pkzip was planned to be 2.00, but may ! 101: be increased to a number greater than 2.2 to prevent confusion with ! 102: several bogus versions, which may destroy all the data on your hard ! 103: disk if you run them.
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