dlyons@Apple.COM (David Lyons) (09/01/89)
>Date: Thu, 31 Aug 89 10:38:14 -0400 (EDT) >From: Brendan Gallagher Hoar <bh1e+@andrew.cmu.edu> > >[...] Hmmm...a neat way of copy protecting files... >make it sparse, and have it check its size before running...anything that was >copied under ProDOS 8 or transmitted over a modem ends up not working... Probably not a very good idea: for one thing, all you'd have to do to get around the "protection" is copy the file in the Finder. Presto! Sparse again. (Or receive it under a GS/OS telcom program, or unarchive it under a GS/OS unarchiver.) Besides...by checking for a particular block count you have a good chance of *preventing* your GS/OS program from running under any present or future non-ProDOS file systems. >I had thought that only text files could be sparse...guess I was wrong... Right--any nondirectory file on a ProDOS volume can be sparse, regardless of its filetype. --Dave Lyons, Apple Computer, Inc. | DAL Systems AppleLink--Apple Edition: DAVE.LYONS | P.O. Box 875 AppleLink--Personal Edition: Dave Lyons | Cupertino, CA 95015-0875 GEnie: D.LYONS2 or DAVE.LYONS CompuServe: 72177,3233 Internet/BITNET: dlyons@apple.com UUCP: ...!ames!apple!dlyons My opinions are my own, not Apple's.