UnARJ Amiga Documentation Page 1 10-Jun-92 UnARJ Amiga Version 0.6, 10-Jun-91, 21:46:54 Written by Peer Hasselmeyer. All rights reserved. 1. What is it ? --------------- UnARJ Amiga is a short, simple and quick hack, that let's you decompress archives that are stored in the ARJ-format which is widely used in the MS-DOS world. 2. Usage -------- UnARJ Amiga can be invoked with the following syntax: UnARJ [-options] [.arj] The following commands are recognized: l - list files in archive v - verbose listing of files in archive e - extract files from archive x - extract files from archive with full pathname t - test integrity of archive The following options are recognized: c - show archive comment i - suppress progress indicator n - extract only non existant files q - query on each file x - disable CRC checking (speeds up decompression by about 10%) y - assume yes on all queries You may set one or more of these flags as default by setting the environment variable ARJFlags. 3. Examples ----------- UnARJ x -cy -x Test extract all files from archive "test" or "test.arj", no CRC check, show comment, overwrite existing files UnARJ l Unarj.arj list archive "Unarj.arj" UnARJ -c v My_Prg.exe verbose listing of archive "my_prg.exe" including archive comment UnARJ t bad_arc -iq test archive "bad_arc" or "bad_arc.arj", no progress indicator, query on each file UnARJ Amiga Version 0.6 - Copyright (c) 1992 Peer Hasselmeyer UnARJ Amiga Documentation Page 2 10-Jun-92 4. Policy --------- Peer Hasselmeyer, the author of UnARJ Amiga, has exclusive rights to this software which is protected by both german and international copyright laws. This software is provided "as is", without warranty and/or guarantee of any kind. You may use and/or distribute this software and copies of it, as long as no alterations have been made, no files have been added to/ommitted from the original distribution archive and no charge is asked for. If you use this software you are oblidged to report all bugs to Peer Hasselmeyer. Suggestions are also welcome, as well as postcards, money, harddrives and other gifts ;-). You may contact me: Peer Hasselmeyer Bursastr. 6 W-6100 Darmstadt Germany FidoNet : 2:247/4 (49-6151-592220) UUCP : ph@foozle.swb.de, ph@foozle.swb.sub.org InterNet: rb386@rbhp56.rbg.informatik.th-darmstadt.de 5. Notice --------- All information concerning the ARJ format and compression scheme were taken from the source codes UNARJ.C, UNARJ.H and DECODE.C. All those were written by Robert K. Jung, the author of the original MS-DOS ARJ. This program is a quick hack. All decoding routines are just direct transformations of the C source DECODE.C into 68000 assembly - nearly no optimisations anywhere. UnARJ Amiga V0.6 is about as fast as LZ 0.91 (by Jonathan Forbes) though. If you would like to add some new features or speed up the decoding routines, feel free to ask the author for the source code. If you are a member of FidoNet, you may always receive the latest version of UnARJ Amiga as well as the source code by frequesting UNARJ / UNARJSRC at 2:247/4. 6. Drawbacks ------------ This version of UnARJ does not: - extract "fastest compression" files (method 4) - process only parts of the archive - restore file date/time UnARJ Amiga Version 0.6 - Copyright (c) 1992 Peer Hasselmeyer