xi.c

#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/extensions/XInput2.h>
#include <signal.h>
#include <unistd.h>

FILE *f;

int working = 1;

/* This functions recieves XI_RawButtonPress event */
void handle_raw_event(XIRawEvent *ev) {
  if(ev->detail == 1) {/* I am only interested in left button clicks */
		fprintf(f,"%u\n",time(NULL));
		fflush(f);
	}
}

int main() {
	Display *dpy = XOpenDisplay(NULL);

	/* XInput Extension available? */
	int opcode, event, error;
	if (!XQueryExtension(dpy, "XInputExtension", &opcode, &event, &error)) {
		printf("X Input extension not available.\n");
		return -1;
	}

	/* Which version of XI2? We support 2.0 */
	int major = 2, minor = 1;
	if (XIQueryVersion(dpy, &major, &minor) == BadRequest) {
		printf("XI2 not available. Server supports %d.%d\n", major, minor);
		return -1;
	}

	f = fopen("/home/yasar/.mouselogs/log","a");
	XIEventMask eventmask;

	unsigned char mask[2] = { 0 }; /* the actual mask */

	eventmask.deviceid = XIAllMasterDevices;
	eventmask.mask_len = sizeof(mask); /* always in bytes */
	eventmask.mask = mask;

	/* now set the mask */
	XISetMask(mask, XI_RawButtonPress);

	/* select on the window */
	XISelectEvents(dpy, DefaultRootWindow(dpy), &eventmask, 1);
	while(working) {
		XEvent ev;
		usleep(10000);
		while(XPending(dpy)) {
			XNextEvent(dpy, &ev);
			if (XGetEventData(dpy, &ev.xcookie))
			{
				switch(ev.xcookie.evtype)
				{
					case XI_RawButtonPress:
						handle_raw_event(ev.xcookie.data);
						break;
				}
			}
			XFreeEventData(dpy, &ev.xcookie);
		}
	}
	fflush(f);
	fclose(f);
}