[Info-vax] C... the only winning move is not to play...

[VAXman- at SendSpamHere.ORG]

In article <ldir57$54k$1 at dont-email.me>, David Froble <davef at tsoft-inc.com> writes:
>{...snip...}
>Yep!  If you were able to know what updates were going to come along 
>before they did so, you'd probably own Atlantic City, Vegas, the NY 
>stock exchange, and such, at least until someone else discovered your 
>secret.  I'm not greedy, I'd settle for one PowerBall win ....
>
>:-)
>
>My dim recollections are that there are 2 methods for obtaining RMS 
>record data, the "move mode" where data is moved to and from some static 
>buffer, such as a MAP in Basic, and then another method that I don't 
>believe I've ever used, and forget the terminology.
>
>So, for the move mode, if you're intercepting the procedure before the 
>data record is moved back to the I/O buffer, then I'd think that you'd 
>have the "before image" still in the I/O buffer.  It should still be 
>valid, since it would have a lock, else updating would not occur.

If you were to predicate this upon what the user passes in their FAB/RAB, to
use you AC and Vegas metaphor, you're going to wind up a sorry loser!

I'm not going to disclose here how I get the "before image" but I assure you
it's not stale data in the user's buffers.  If you'd really want to know how
it's done, an NDA will need to be signed.



>Then there is writing new data.  And global buffers.  My, you really 
>have gotten yourself into a quagmire.

Global buffers, believe it or not, are not treated any differently than the
local buffers.



>> When initially scoped out, the idea was to simply intercept the RMS service
>> and copy the data from the FAB or RAB but that's not the *right* way to do
>> it.  I won't go into detail here for a number of reasons.  I did, however, 
>> do a rather detailed expose' on the inner working at two OpenVMS Bootcamps.
>> 
>> Seriously, if you do see a use/need for this, contact Attunity.  I'm sure
>> Hein would be happy to discuss the application of RMS CDC with you.  I can
>> then answer specific questions for you if needed.
>> 
>
>I doubt they would have anything that would help me, as DAS has nothing 
>to do with RMS, well, once again I'm wrong, it uses the filename parser 
>in RMS, but nothing else.

DAS???

-- 
VAXman- A Bored Certified VMS Kernel Mode Hacker    VAXman(at)TMESIS(dot)ORG

Well I speak to machines with the voice of humanity.