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1988-02-12
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666 lines
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unStufit: for the IBM PC
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STUFFIT file unpacker
----------------------------------
unStufit is distributed freely and may be copied by anyone for
any number of machines. The author considers unStufit to be
"shareware" or "freeware". unStufit is a part of the shareware
package PC-VCO. If you have subscribed to PC-VCO, unStufit is
released for your use. If you wish to use unStufit without
subscription to PC-VCO, please support its development and main-
tenance with a subscription of 10.00 dollars. The author may be
reached at:
CABER Software
R. (Scott) McGinnis
P.O. Box 3607 Mdse Mart
Chicago, IL 60654-0607
PLINK id: TARTAN
Version 1.0: 880211
R.McGinnis; Chicago
unStufit: STUFFIT file extractor
Version 1.0: 880211
Table of Contents
-----------------
I. Introduction ................................................. page 1
II. Running the program .......................................... page 3
III. unStufit Command Summary ...................................... page 4
IV. unStufit Switches ............................................. page 5
V. VCOLIB usage .................................................. page 6
VI. Batch extraction .............................................. page 7
VII. Program Requirements .......................................... page 7
VIII. Program and Author Information ............................... page 8
Appendices
----------
A. MacBinary Header .............................................. page 9
B. STUFFIT File structure ........................................ page 10
C. STUFFIT Archive Header ........................................ page 11
D. STUFFIT Subfile Header ........................................ page 12
E. unStufit Error messages ....................................... page 13
unStufit: STUFFIT file extractor Page 1
Version 1.0: 880211
I. Introduction
unStufit for the IBM PC is a utility that extracts files packed
together on a MacIntosh computer with the STUFFIT utility. STUFFIT
on the MacIntosh will pack multiple files together (optionally
compressing and encoding them) into one file. unStufit on the IBM
PC allows the extraction of individual files from the STUFFIT
envelope. Many files maintained as '.SIT' (the usual STUFFIT
extension) on Mac BBS's, Clubs, and SIG's are now accessible to
users of the IBM PC.
STUFFIT was developed and has been extended by Raymond Lau. STUFFIT
(through version 1.20) stored files together, with non-compression
and 3 optional types of data compression. STUFFIT is available as
shareware.
unStufit is compatible with STUFFIT. unStufit was developed to
support the shareware package PC-VCO for the IBM PC. Face files
created on MacIntosh computers are frequently packed together on the
various boards: PLINK, CIS, Delphi, and GEnie. Now packed face
files are available to PC-VCO users. A packed file may be
downloaded to an IBM PC and unStufit used to extract individual face
files.
unStufit may be copied freely and distributed to anyone for any
number of machines. The author considers this to be "shareware" or
"freeware" unStufit is a part of the shareware package PC-VCO. If
you have sub- scribed to PC-VCO, unStufit is released for your use.
If you wish to use unStufit without subscription to PC-VCO, a
contribution is asked. unStufit (and PC-VCO/unStufit) will be
extended and enhanced if response warrants.
unStufit: STUFFIT file extractor Page 2
Version 1.0: 880211
I. Introduction (continued)
What is PC-VCO, by-the-way?
PC-VCO is a communications program for the IBM PC with two sides.
On the one hand, it provides standard comm program functions: a
dialing directory, macros, disc logging, XMODEM and ASCII file
transfer, and so on. However, used with network conferencing
services such as People/Link's PARTY, CompuServe's CB and Delphi's
conference area, PC-VCO provides a way to 'see' and 'hear' people
talking.
The idea for PC-VCO was derived from the VCO system, and its
predecessor VMCO, developed for the MacIntosh computer. The VCO
programs (PC and MacIntosh) allow you to see the people you
communicate with on-line, using the graphic capabilities of the
personal computer and to hear conversation with speech synthesis.
VCO was originally developed by Harry Chesley. It was followed by
VMCO (which is CIS specific), written by Bob Perez independant to
the development of VCO. The current (MacIntosh) version of VCO is
almost an exact duplicate of Harry Chesley's original - the original
source code was converted by Mike Cohen and made to accept multiple
service formats. [Note: Mike Cohen's VCO uses VMCO formated files.
Harry Chesley's VCO files differ. VCOLIB can accomodate either.
PC-VCO in VCO mode can talk to either, according to your choice.]
The MacIntosh VCO allows the user to see the people talking on-line
through graphic Icons. The Icons are provided to the VCO program as
'Resource files' and are built using a 'Resource Editor'. Each VCO
user must have a resource file for every potential other speaker.
Charlie Brown and Snoopy Icons are used if no 'Faces' are available.
A range of expressions, from 'normal' to bored to surprised make VCO
conferences lively. Each participant controls the expression
displayed to all other participants.
On most large systems, the face files for 20 or more people have
been packed (and compressed) together with the shareware product
STUFFIT. The files will be found in the library areas with the
extension of '.SIT'. And thus unStufit for the IBM PC !
unStufit: STUFFIT file extractor Page 3
Version 1.0: 880211
II. Running the program
unStufit is invoked at the DOS prompt with the command:
------------------------------------------------------
"d>" unStufit <option>
Where "d>" is the DOS prompt, and
<option> is: (<switch> or <cmd> <SIT-File> (<parm> (,<parm> ...)))
where <switch> is one of the following: /+, /-, /B, /D, /R
<parm> is a subfile name,
<SIT-file> is the STUFFIT file name to be used,
and <cmd> is one of the following: E,X,L,V
Note: Specifying no commands at all will provide an abbreviated
HELP display summarizing available commands.
------------------------------------------------------
unStufit commands and switches are summarized on the next pages.
unStufit: STUFFIT file extractor Page 4
Version 1.0: 880211
III. unStufit Command Summary.
Command Parameter Description
--------- --------- --------------------------------------------------
(E)xtract subfile Extract the specified subfile. Subfile names are
name listed with the 'L' or 'V' commands. Subfile names
are up to 63 bytes in length, and may not contain
a comma or a semi-colon. Case is not significant.
(X)tract subfile Extract the specified subfile. This is simply a
name synonym for the 'E' command discussed above for
those of us who spell phonetically.
(L)ist List the subfiles of the specified SIT file. If
a parameter is given it will be ignored. The
list command gives the following information:
Subfile name (1-63 characters in length)
File Type (4 characters)
File creator (4 characters)
Compression. Compression types are:
0 - non-compression
1 - repeat character compression (RLE)
2 - dynamic Lempel-Ziv,Weiss compression
3 - Huffman compression
(V)erbose List the subfiles of the specified SIT file. If a
parameter is given it will be ignored. The verbose
list gives the information above and th