WG: Re: using uinput connect X to proprietary (TCP based) keyboard endpoint

[Arne.Adams at t-online.de]

Hi Peter,
thanks for the quick reply.
Unfortunately that did not do the trick.
When I use my laptop keyboard, I do see the output from my loop, however the simulated scancodes (currently that device just sends the scan code for the letter 'r') from my uinput device are not displayed.

This is the output from showkey:
sudo showkey -s
kb mode was ?UNKNOWN?
[ if you are trying this under X, it might not work
since the X server is also reading /dev/console ]

press any key (program terminates 10s after last keypress)...
0x13 0x13 0x13 0x13 0x13 0x13 0x13 0x13 0x13 0x13 0x13 0x13 0x13 0x13....

This is the output from xinput:
xinput test-xi2 uinput-sample | perl -lne ...
KeyPress 27 [r] 0x10 [Num_Lock]
KeyPress 27 [r] 0x10 [Num_Lock]
KeyPress 27 [r] 0x10 [Num_Lock]
KeyPress 27 [r] 0x10 [Num_Lock]
KeyPress 27 [r] 0x10 [Num_Lock]
KeyPress 27 [r] 0x10 [Num_Lock]
KeyPress 27 [r] 0x10 [Num_Lock]
...
and this is the output without the perl filter:

xinput test-xi2 uinput-sample
uinput-sample                           	id=15	[slave  keyboard (3)]
	Reporting 1 classes:
		Class originated from: 15. Type: XIKeyClass
		Keycodes supported: 248

EVENT type 2 (KeyPress)
    device: 15 (15)
    detail: 27
    flags: repeat
    root: 1113.00/127.00
    event: 146.00/75.00
    buttons:
    modifiers: locked 0x10 latched 0 base 0 effective: 0x10
    group: locked 0 latched 0 base 0 effective: 0
    valuators:
    windows: root 0x285 event 0x3400001 child 0x0
EVENT type 2 (KeyPress)
    device: 15 (15)
    detail: 27
    flags: repeat
    root: 1069.00/129.00
    event: 102.00/77.00
    buttons:
    modifiers: locked 0x10 latched 0 base 0 effective: 0x10
    group: locked 0 latched 0 base 0 effective: 0
    valuators:
    windows: root 0x285 event 0x3400001 child 0x0
EVENT type 2 (KeyPress)
    device: 15 (15)
    detail: 27
    flags: repeat
    root: 1061.00/129.00
    event: 94.00/77.00
    buttons:
    modifiers: locked 0x10 latched 0 base 0 effective: 0x10
    group: locked 0 latched 0 base 0 effective: 0
    valuators:
    windows: root 0x285 event 0x3400001 child 0x3400002
EVENT type 2 (KeyPress)
    device: 15 (15)
    detail: 27
    flags: repeat
    root: 1058.00/130.00
    event: 91.00/78.00
    buttons:
    modifiers: locked 0x10 latched 0 base 0 effective: 0x10
    group: locked 0 latched 0 base 0 effective: 0
    valuators:
    windows: root 0x285 event 0x3400001 child 0x3400002

Kind regards,
Arne


-----Original-Nachricht-----
Betreff: Re: using uinput connect X to proprietary (TCP based) keyboard endpoint
Datum: Thu, 16 Oct 2014 17:12:45 +0200
Von: Peter Hutterer <peter.hutterer at who-t.net>
An: "Arne.Adams at t-online.de" <Arne.Adams at t-online.de>
Cc: xorg at lists.x.org

On Thu, Oct 16, 2014 at 04:48:37AM +0200, Arne.Adams at t-online.de wrote:
> Hi, 
> I am trying to integrate a proprietary keyboard, sending linux scancodes via TCP.
> My idea is to use uinput to forward the received keycodes to locally running applications (including the x server).
> In my xorg.conf I have the following section:
> 
> Section "InputDevice"
>     # to enable user defined virtual keyboard
>     Identifier     "Keyboard1"
>     Option         "Device" "/dev/input/event14"
>     Driver         "evdev"
> EndSection
> where event14 is the event queue associated to the uinput simulated "device".
> I do see the scancodes sent from my device with both commands:
> - xinput test-xi2 --root
> -  showkey -s
> However I am not able to intercept the keyboard events in this simple X application
> 
> int main(int argc, char** argv)
> {
>   Display* display = XOpenDisplay(NULL);
>   Window window = XCreateSimpleWindow(display, RootWindow(display, 0), 1, 1, 500, 500,
>                                       0, BlackPixel(display, 0), BlackPixel(display, 0));
>   XSelectInput(display, window, KeyPressMask | KeyReleaseMask);
>   XMapWindow(display, window);


add a XFlush() here, that should do the trick.

Cheers,
   Peter

>   XEvent report;
>   while (1)
>   {
>     XNextEvent(display, &report);
>     switch (report.type)
>     {
>     case KeyRelease:
>       printf("got a KeyRelease event: %d, %d\n", report.xkey.keycode, report.xkey.state);
>       break;
>     case KeyPress:
>       printf("got a KeyPress event: %d, %d\n", report.xkey.keycode, report.xkey.state);
>       break;
>     default:
>       printf("got a %d event\n", report.type);
>       break;
> 
>     }
>   }
>   XFlush(display);
>   sleep(5);
>   return (EXIT_SUCCESS);
> }
> 
> 
> 
> 
> 
> 
> 
> 
> _______________________________________________
> xorg at lists.x.org: X.Org support
> Archives: http://lists.freedesktop.org/archives/xorg
> Info: http://lists.x.org/mailman/listinfo/xorg
> Your subscription address: %(user_address)s
>