Problem with PowerMgmt Capability

[-chris-]

Hi all,

I'd like to use TApaTask::EndTask() to quit another Program. I've added PowerMgmt Capability and OpenSigned the app, but when I try to run it, it quits with the error

Standby Mode: Unable to execute file for security reasons.

What am I doing wrong?

[ltomuta]

Run the application in the emulator and see if epocwind.out gives you any clues. Also, make sure that the capability change was indeed propagated to your binary: elftran -dump s <your>.exe

Also, are you using a DLL which doesn't have the PowerMgmt capability?

[-chris-]

Also, are you using a DLL which doesn't have the PowerMgmt capability?

Thats it! Thanks for the info, didn't know that this constellation does not work...

[Sorcery-ltd]

Yes, a process can only load a DLL which has the same, or greater capabilities than it does. This is one of the basic PlatSec rules, otherwise code in DLLs could get to run with greater privilege than it's supposed to. This is because it's the process that is granted the capabilities at run-time - the DLL just contains some code that the process runs.

Sorcery

[yogpan]

Hi,
Platform security is one of the topics in 3rd edition which has caused lot of confusion to the developers related with what capabilities to be used and how exactly it all relates with the platform and application in general. There is a very good technical documentation on this
http://developer.symbian.com/main/do...l_overview.pdf
I hope it will clear lot of concepts about Platform security