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1997-01-21
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Description of TOUCH.PRG (c) S. Engel 12'92
TOUCH is a supplemement to GEMAR
Intention:
TOS has a relatively simple mechanism for marking modified files.
An archive-bit will be attached to the modified file in order to declare
that the particular file was altered and must be saved.
On the other side some other systems, e.g. OS9, another method is used:
one file has always two data-registrations. One of them denotes the date
of the file creation, the second one the date of the last modification.
The TOS procedure is not always sufficient for a backup program to apply
a reasonable backup strategy.
That's why I created TOUCH.
Way of function:
After a file has been modified, TOUCH sets the date of a file at the
actual time of the system. Hence, a reasonable backup mechanism can
be used (cleanup incremental)
TOUCH uses the XBRA-denotation 'TOUC'
Restrictions and known errors:
-TOUCH manages file handles from 0 through 200. Larger handles will not be
considered.
-no reentrancy for the time being!
-if an accessory was loaded in Chamäleon and data were modified, the computer
will break down. The reason for that is not known right now.
Installation:
Copy TOUCH.PRG to your AUTO-Folder.
Steffen Engel, 1.12.92