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RBBS in a Box Volume 1 #2
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1986-02-12
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PKXARC FAST! Archive Extract Utility Version 2.3 2-11-86 by Phil Katz
Page 1
Using PKXARC
------------
pkxarc [[/r]|[/h]] [[d:]path\]ARCfile[.ext] [[d:]path\]
/r replace existing files without query
/h display help information
d: drive letter - default is current drive
path\ DOS path name - default is current subdirectory
ARCfile ARChive file name. Wildcards *,? ok.
.ext file extension - default is ".arc"
For example, to extract files from all ARChives on drive A and store
extracted files on drive B:
pkxarc a:* b:
To extract the files from \fruit\tomato.arc and store files in \vegies
overwriting existing files without query:
pkxarc/r \fruit\tomato \vegies\
To extract all the files from the file c:trekfull.arc and place extracted
files in the current drive & subdirectory:
pkxarc c:trekfull
PKXARC FAST! Archive Extract Utility Version 2.3 2-11-86 by Phil Katz
Page 2
PKXARC warnings
---------------
Warning! File YYY already exists! overwite (y/n)?
- A file to be extracted from the ARChive already exists on disk. Answer
"y" to extract the file from the archive anyway and overwrite the
existing file, "n" to not extract the file from the archive. Use the
"/r" command line option to suppress this warning.
Unknown packimg method for file YYY
- The file is squeezed or encoded in a unkown way. The ARChive is
probably corrupt.
Warning! File YYY fails CRC check
- The Cyclic Redundancy Check calculation did not match the stored value.
The file is probably corrupt.
XXX is not an archive
- The ARChive file header does not indicate this is an ARChive file.
Archive length error
- A end of file token was not found for a file within the ARChive. The
ARChive is corrupt.
Invalid header in archive
- The header information for the ARChive is invalid.
PKXARC errors
-------------
PKXARC: can't find XXX
- The given ARChive filename could not be found.
PKXARC: cannot read archive: XXX
- The ARChive could not be opened.
PKXARC: Cannot create: YYY
- The output file could not be created. The output directory is invalid
or full.
PKXARC: File has invalid decode tree
- The Huffman decode tree for the file is invalid. The ARChive is
corrupt.
PKXARC: Disk full
- A write to the output file failed. The disk is most likely full.
PKXARC: Internal table overflow
- An internal decode table overflowed. The ARChive is corrupt.
PKXARC FAST! Archive Extract Utility Version 2.3 2-11-86 by Phil Katz
Page 3
PKXARC history
--------------
Soon after the ARChive file format was introduced into the public domain it
became popular, and many BBS files were transfered this way. The ARChive
format is a convenient way to put several files into one and squeeze them
for effecient disk storage and reduced transfer time, in one step.
However, the ARChive utility was much slower at extracting files than
equivalent UnSQueeze type programs. In the inevitable quest for faster
ARChive file extraction, PKXARC was born.
Changes in PKXARC version 2.3
-----------------------------
The ability to extract dynamic Lempel-Zev encoded files was added. Version
5.0 of ARC introduced a new, more efficient variation of Lempel-Zev
'crunching'. PKXARC can now extract files crunched with this method, up to
3 times faster than ARC 5.1.
General
-------
PKXARC will run on any IBM PC/XT/AT/RT/jr/Portable/Lap-Top or comaptible
running PC/MS DOS 2.0 or higher.
You are free to use, copy, and distribute PKXARC providing that:
NO FEE IS CHARGED FOR USE, COPYING OR DISTRIBUTION.
IT IS NOT MODIFIED IN ANY WAY.
If you have any questions or comments about PKXARC send them to:
Phil Katz
EXEC-PC IBBS
Milwaukee, WI.
(modem) (414) 964-5160.