How to grab the input event exclusively?

[Derek Foreman]

On 21/12/15 09:45 AM, Lance Bai wrote:
> Hi Pekka,
> 
> thanks for your reply.
> 
> On Mon, Dec 21, 2015 at 3:02 PM, Pekka Paalanen <ppaalanen at gmail.com
> <mailto:ppaalanen at gmail.com>> wrote:
> 
>     On Mon, 21 Dec 2015 14:35:14 +0000
>     Lance Bai <lancebai at gmail.com <mailto:lancebai at gmail.com>> wrote:
> 
>     > Dear All,
>     >
>     > I have a question regarding grabbing the key input in weston.
>     >
>     > I am running weston-1.8.92 on raspberry pi2(i.e compositor-rpi, launch with
>     > weston-launch), and found that the /dev/input/eventX file descriptor is
>     > read by both weston and tty, which means the input will be showed on the
>     > tty terminial as well. However, I would like the key input taken by the
>     > weston application only, without showing what I type in TTY.
> 
>     That sounds terrible. Please file a bug report.
> 
> 
> sure, I am going to create a bug report regarding that. 
> 
>     > Should I set the input event fd with EVIOCGRAB in weston_launcher_open,
>     > like libinput/tools/shared.c? or is there any better approach?
> 
>     The VT input should get disabled as part of the launching sequence and
>     also in the VT-switching sequence. Sounds like that's not working right.
> 
>     Or it is possible that Weston is showing, but not on the VT it thinks
>     it is.
> 
> 
> is there a easy way to check this?
>  

lsof /dev/tty*
should show you what has the tty files open

Are you passing any command line parameters to weston-launch?  Are you
running as a regular user?

> 
> 
>     Do you have systemd or not?
> 
> 
> no,  I do not build systemd  on my rpi2 develop environment.
>  
> 
> 
> 
>     Thanks,
>     pq
> 
> 
> 
> 
> -- 
> BR,
> Lance Bai
> 
> 
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