hooking the sept

["Steve Richter" <srichter@xxxxxxxxxxxxx>]

can an mi pgmr hook the sept, intercepting system calls, in a similar manner as interupts are hooked on a pc?

 

Does the following scenario work?

 

1. the sept is a permanent system object, a space?

 

2. the sept space can be duplicated?  by CrtDupObj? by creating a user space called MySept and using CPYBWP to copy the contents of Sept to MySept?

 

3. when a job starts, a spcptr in the pco is set to the Sept?

 

4. This pco spcptr is used as the base pointer for all subsequent access to the sept?

 

5. a job could use CPYBWP to change the spcptr in the pco to point to MySept instead of the real Sept?

 

6. you are then in mi heaven, able to intercept all sorts of system calls?

 

Thanks for the help,

Steve