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From: 850031m@aucs.uucp (Ross MacGregor)
Newsgroups: comp.sys.amiga.tech
Subject: Intercepting DOS Write()
Message-ID: <1990Mar14.212215.12450@aucs.uucp>
Date: 14 Mar 90 21:22:15 GMT
Reply-To: 850031m@aucs.UUCP (Ross MacGregor)
Distribution: na
Organization: School of Computer Science, Acadia Univ., Nova Scotia
Lines: 29

Hello,

Im looking for a way to have a process informed of a write to a floppy
disk.  I've come up with two ideas so far, what do you think?

I could:

A) Patch the DOS Global Vector jump table.  Basically SetPatching the DOS 
   library.  I could patch Write() to inform me of a write to floppy.  
   Anybody still have the articles posted here not long ago on SetPatching 
   DOS library?
   Of course this is would not be a very good solution since this may not
   work with future OS revisions.

B) With DeviceProc() I could find each DOS device handler process.  
   Then I could get the task stucture for each process.
   Now with the tc_Launch entry of the task structure, could I
   place a funtion there that will inform a process of mine via a signal
   or message that the device handler was passed a write request?
   Tc_Launch is a funtion pointer that gets envoked when the task is
   started up (placed in the run state).
   Has anybody used this tc_launch thing?

Is there another way?

-- 
Ross MacGregor                                      | " Elvis Lives - I
E-mail: 850031m@AcadiaU.CA                          |   heard him on the   
UUCP:   {uunet|watmath|utai}!cs.dal.ca!aucs!850031m |   radio yesterday"