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#define _GNU_SOURCE /* for asprintf */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/input.h>
#define BITS_PER_LONG (sizeof(long) * 8)
#define BITS_TO_LONGS(x) \
(((x) + 8 * sizeof (unsigned long) - 1) / (8 * sizeof (unsigned long)))
int main(int argc, char** argv)
{
int fd = open("/dev/input/event14", O_RDWR);
char name[4096];
int return_value = ioctl(fd, EVIOCGNAME(sizeof(name)), name);
printf("%s\n", name);
printf("%d\n", return_value);
unsigned long features[BITS_TO_LONGS(FF_CNT)];
return_value = ioctl(fd, EVIOCGBIT(EV_FF, sizeof(features)), features);
printf("return of ioctl is: %d\n", return_value);
printf("features[] holds: ");
for (int i = 0; i < BITS_TO_LONGS(FF_CNT); ++i) {
printf("%d ", features[i]);
}
puts("");
int num;
return_value = ioctl(fd, EVIOCGEFFECTS, &num);
printf("return_value: %d, num: %d\n", return_value, num);
return 0;
}
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