From: Frederick Cheung <frederick.cheung@...>
Date: 2007-12-30T08:53:02+09:00
Subject: Re: Can Ruby be a keylogger on Win/Mac?


On 29 Dec 2007, at 22:42, John Joyce wrote:

> You're going to have a hell of a time building a keylogger for OS X.
> You'll want to look into the input managers. The same thing for  
> building an Input Method for another language.
> With that part of Cocoa, you could definitely monitor input.
> Beware though, the docs are dense, and there is big learning curve.
> Also, input methods tend to cross the gap between Cocoa and Carbon  
> (basically between Obj-C and C frameworks)
>
> You might try an AppleScript layer that intercepts and then passes  
> the same keystrokes... (System Events)
>
InputManagers are only loaded into applications that load the cocoa  
runtime and are sort of on their way out. The lowlevel functionality I  
would look at would be a CGEventTap (see CGEvent.h)

Fred