Re: console switching

[James S. <jsi...@tr...>]

> just a quick curiosity:
> how does one detect when a console switch occurs?  we are writing an 
> application that needs to stop drawing on the framebuffer when it is no longer 
> in the correct console. (ie, we run app in console 1, we then switch to console 
> 2.  app needs to not draw all over console 2's screen (1 fb device))
> 
> normally, i would try to avoid such a dumb question, but i haven't found an 
> obvious solution immediatly.

Fancy signal handling. The ioctl values you need to play with are VT_RELDISP. 
See libsvga for a example of how this is handled.