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VOL2946
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1992-01-07
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P r o g r a m m a T h e e k volume 2946
Titel: ZIP, SCRNCH, DWC archive systems
Number Name Size Date Comments
CATALOG 946 327 3-02-90 This list
2946.01 DWCC---L EXE 90112 9-24-88 DWC data compression util (SFX)
2946.02 PKZ102 EXE 135808 10-01-89 PKZIP 1.02 (SFX)
2946.03 SCRNCH ZIP 54894 3-02-90 SCRNCH - for making self-exploding
.EXE
VOL2946 ABS 5496 3-02-90 Abstract by M.
5 File(s) 73728 bytes free on volume VOL2946
DWC Release A5.01 - by Dean W. Cooper
DWC is an archive utility patterned after ARC, (C) Copyright System
Enhancement Assoc., that has many improvements and added features.
Please note, however, that DWC is Not file compatible with ARC and cannot
be used to add or extract ARC files.
Basic improvements include compression speed and size, and error
handling. Also, DWC includes all of ARC's commands and options (except
the run command) and adds many new ones along with small improvements
over the old ones. These are detailed below.
Commands: Options:
a Add files to archive <digits> Max number of entries in directory
m Move files to archive s Suppress compression of file
u Update files to archive b Retain backup copy of archive
f Freshen files to archive n Suppress normal program messages
d Delete files in archive w,! Suppress (w)arnings, or all (!)
messages
e,x Extract files from archive q Query on each add or extract
p Extract to standard output o Only extract files with newer dates
l List files in the archive i Inquire comment field on each add
v Verbose list of files z,y Optimize for size (z), or speed (y)
t Test integrity of files = Make archive date equal newest file
c Convert files in archive j Merge archives on add
h Name header file of archive r Record directory on add, use on
extract
i,k Edit comment field of files g Encrypt on add, decrypt on extract
= Make date equal newest file - Negate the following option
/s Extend wildcard expansion to all sub-directories
****
SCRNCH is a data compressor designed for people, such as software
developers, who need to send programs or files to a large number
of people cheaply. It provides a high degree of compression and
the ability to customize the self-extracting compressed file.
SCRNCH takes its time to produce optimal compression, but
decompression is automatic and very fast.
PKZIP / PKUNZIP
The following 12 files are included in PKWARE Version 1.02
PKZIP.EXE Main compression program.
PKUNZIP.EXE Main extraction program.
MAKESFX.COM Starts the process of creating self-
extracting files
ZIP2EXE.EXE Used in creating self-extracting files.
README.DOC General Information.
DEDICATE.DOC Dedication of file format and extension to
the public domain.
ORDER.DOC Registration information and order form.
LICENSE.DOC Information on Site and Distribution Licenses.
OMBDSMAN.ASP Association of Shareware Professionals info.
MANUAL.DOC Reference manual for PKWARE File Compression
Programs.
APPNOTE.TXT Technical background material.
PKZIPFIX.EXE Reconstructs corrupted ZIP files.
The following features are available with PKWARE Version 1.0
(PKZIP/PKUNZIP/PKSFX) Compression Programs.
1. Improved Compression! PKZIP 1.0 implements a
new compression algori called ploding, which averages
5% to 15 % better.
compression than the maximal compression (Reducing) of
PKZIP 0.92. Imploding is also faster at compressing and
extracting than Reducing was.
2. Password encryption. Sensitive data files can be scrambled
with password protection.
3. Automatic detection and utilization of 80386 CPU's. PKZIP
and PKUNZIP test for the presence of an 80386 CPU. If
present, PKZIP and PKUNZIP will use the 80386's 32 bit
instructions and extended addressing modes for improved
performance.
4. Special file handling capabilities will automatically
recurse through subdirectories and store pathnames within
a ZIP file. These paths can then be created on extraction
if they do not already exist.
5. Extra compression options allow you to specify the method
of compression (Shrinking or Imploding) to be employed.
6. A file that has been created as a self-extracting file can
be treated as a normal ZIP file. All PKZIP
and PKUNZIP
options (except -v View) will be valid.
7. Files contained in a ZIP file can be viewed in several
different ways. For example, the can be sorted by:
compression ratio, size, date, name, or extension.
8. A new option, -x, can be used to specify files to be excluded
from any ZIP operation being performed.
9. Special file attributes (hidden, read-only, system) can be
masked during creation or extraction of a ZIP file. PKZIP
can also be configured to include or not include hidden and
system files.
10. ANSI comments may be enabled/disabled.
11. Expanded Configuration file options are available.
12. Individual file comments (up to 60 characters in length)
can be programmed for each file in the ZIP file.