Re: [Linux-fbdev-users] Frame buffer detection

[Antonino A. D. <ad...@ho...>]

On Friday 03 September 2004 23:09, ro...@ub... wrote:
> Hello.
>
> How can I determine whether a script is being run
> from a frame buffer console?
>
> I need this information in order to choose the
> correct arguments when calling a program from
> my script.
>

You can parse /proc/fb to find out if any framebuffer drivers are loaded, then 
do an ioctl where request is FBIO_GET_CON2FBMAP, and struct  
fb_con2fbmap.console is set to the console number you want to determine.
If successful, check fb_con2fbmap.framebuffer on return. Valid values are from 
0  to (FB_MAX - 1) where FB_MAX is the number of framebuffer drivers 
configured in your system

In 2.6, an unmapped console will return fb_con2fbmap.framebuffer = -1.  In 
2.4, I'm not sure, but it's possible that it can be undefined.

Tony