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EnigmA Amiga Run 1997 February
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EnigmA AMIGA RUN 15 (1997)(G.R. Edizioni)(IT)[!][issue 1997-02][PLANET CD V].iso
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xScan.doc
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1996-11-26
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xScan V1.2 - Manual
NAME
C:xScan
SYNOPSIS
xScan FILE/M/A,ALL/S,REMOVE/S
DESCRIPTION
xScan is a small CLI command which scans through XFH partition and
modifies them. After those modifications XFH (V1.34 or newer) will be
able to read directories MUCH faster. In fact you'll no more notice
a speed difference between XFH and the normal FileSystem.
VERY IMPORTANT:
xScan will NOT work if you use it directly on a XFH partition, it'll
just do nothing. Instead of that you must use it on the PHYSICAL
directory of the XFH partition. E.g. if your XFH partition is called
"XH0:" and the rootdir of is "DH0:Archive", DON'T use "xScan XH0: ALL"
but "xScan DH0:Archive ALL".
THEORY
How does "xScan" work ?
If XFH scans through a directory it opens EVERY file to check if it's
packed or not. That's why it's so slow.
xScan scan once through the directories for files. If it finds one
with an UNUSED filenote it adds a special one (filenote) to the file.
This filenote contains an ID string, some check values and the length
of the unpacked file(*).
If the new XFH scans through the directories it checks for such
filenotes and after finding one with still valid check values it'll
take the unpacked length from the filenote without opening the file.
That's why the new version is faster. Of course these special
filenotes will be hidden.
(*) I don't want to explain the format exactly, because people
shouldn't use these informations.
ARGUMENTS
FILE: You can supply as many files, directories or patterns
as you want.
ALL: scan through directory trees
REMOVE: remove filenotes instead of creating them
Examples:
xScan SYS:Archive/MetaFont ALL
or
xScan Docs/#?.doc REMOVE
HISTORY
1.0
- initial release for XFH 1.34
1.1
- adds special filenotes to unpacked files, too
1.2
- does NOT follow softlinks any more
COPYRIGHT
xScan is free to be spread on public-domain and shareware disks as
long as they are sold for a reasonable charge that is less than $6.
This applies not to Fred Fish, he and ONLY he can take more money.
For use in commercial products the permission of the author is
required.
AUTHOR
Matthias Scheler
Schützenstraße 18
33178 Borchen
Phone: +49-5251-399031
InterNet: tron@lyssa.pb.owl.de
FidoNet: Matthias Scheler 2:243/6310.10