leds.c

Linux下的一个用于控制xwindow下的numlock键及caps键开/关的程序,用于工控行业.

#include <X11/extensions/XTest.h>
#include <X11/keysym.h>

int main(int argc, char **argv)
{
Display* disp = XOpenDisplay(NULL);
XKeyboardControl val;
if (disp == NULL) return 1;

if (argc == 1)  //only switch numlock
{
	XTestFakeKeyEvent(disp, XKeysymToKeycode(disp, XK_Num_Lock), True, CurrentTime);
	XTestFakeKeyEvent(disp, XKeysymToKeycode(disp, XK_Num_Lock), False, CurrentTime);
}
else if (argc ==2)
{
switch (*argv[1])
	{
	 case '1':
	XTestFakeKeyEvent(disp, XKeysymToKeycode(disp, XK_Caps_Lock), True, CurrentTime);
	XTestFakeKeyEvent(disp, XKeysymToKeycode(disp, XK_Caps_Lock), False, CurrentTime);
	break;
	case '2':
	XTestFakeKeyEvent(disp, XKeysymToKeycode(disp, XK_Num_Lock), True, CurrentTime);
	XTestFakeKeyEvent(disp, XKeysymToKeycode(disp, XK_Num_Lock), False, CurrentTime);
	break;
	}
}

XCloseDisplay(disp);
return 0;
}