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Authorization Plug-in with GUI
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Authorization Plug-in with GUI


  • Subject: Authorization Plug-in with GUI
  • From: Markus Hanauska <email@hidden>
  • Date: Wed, 15 Feb 2006 12:08:20 +0100

Hi everyone,

I'm currently reading the documentation for the Authorization Plug- in. I'd like to write one that kicks in during login process before the actual log-in window appears (for Tiger only).

So far I understood everything I have to do with /etc/authorization and how to write a plug-in itself (thanks to the NullAuth Plug-in code example). The problem is, my plug-in has to display a GUI and it would be great if that's Cocoa using NIB files, not programatically using Carbon.

However, I don't understand how to do this. When my functions are called, I don't know from which thread and which context. Am I within a Cocoa context or just a C context. AFAIK the Cocoa tools only work if the event handler is thread 0 (trying to create an app and runloop in another thread gets you nowhere).

So I tried just loading my NIB with a subclassed controller, not working. So how would I go about creating a GUI? Is there any trick? Does Apple has any source code showing an Authorization Plug-in with GUI?

In the docu Apple says "If your mechanism spins off a separate process or UI thread". I don't know if a separate process could be called really "safe", if I have to move info around using some IPC services (whether it is distributed object or a simple pipe). So how would I go for "spinning off an UI thread" for a Cocoa GUI?

--
Best Regards,
    Markus Hanauska


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