On Fri, 28 December 2001, firstname.lastname@example.org wrote: > 1). It has to be done for each new release. (There is an exposure that > IBM could update that message mid-release via PTF, but this is unusual.) It should only need to be done for releases that change the way SysReq works. I'd guess this is going to remain rare. > 2). IBM has been known to modify the message from release to release. If > you don't carefully follow what they do, you could cause breakage. No matter how it's implemented, an IBM modification is a risk. > 3). It's easy to screw up. Because...? To me, it seems easy to get right. Of course, any system-level kind of change can be screwed up. It's hard to "test" changes to a startup program for example. But a *msgf override set by an initial program (or maybe a routing program) can be tested in isolation without necessarily affecting anyone but the tester. > 4). A malicious command could always be inserted. Again, no matter how it's implemented, this is true. Overall, I suspect that any significant future change by IBM will involve the registration facility, perhaps by expansion of the QIBM_QWT_SYSREQPGMS exit point, perhaps by adding a new exit point. However it'd be done, SysReq is so widely used and so ingrained that there better be plenty of notice from IBM. If they tried slipping in something dangerous such as swapping options 2 and 5 (ENDRQS and SNDMSG) without a lot of advance publicity, it won't matter if some few sites have implemented some kind of override. And with minimal thought put to planning, it'd be possible for an operator or administrator to disable this on a moment's notice. Just MHO. Tom Liotta -- Tom Liotta The PowerTech Group, Inc. 19426 68th Avenue South Kent, WA 98032 Phone 253-872-7788 Fax 253-872-7904 http://www.400Security.com ___________________________________________________ The ALL NEW CS2000 from CompuServe Better! Faster! More Powerful! 250 FREE hours! Sign-on Now! http://www.compuserve.com/trycsrv/cs2000/webmail/
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