Das hat ein bekannter "übersetzt".
Code:
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>

#include <linux/input.h>

#define MOUSEFILE "/dev/input/event7"

/* 	oder wenn nicht USB mouse sondern trackpoint:
	#define MOUSEFILE "/dev/input/event5"

*/

int main()
{
	int fd;
	struct input_event ie;

	if((fd = open(MOUSEFILE, O_RDONLY)) == -1) {
		perror("opening device");
		exit(EXIT_FAILURE);
	}

	while(read(fd, &ie, sizeof(struct input_event))) {
		printf("time %ld.%06ld\ttype %d\tcode %d\tvalue %d\n",
		       ie.time.tv_sec, ie.time.tv_usec, ie.type,
ie.code, ie.value); }

	return 0;
}
[/code]