1 files changed, 41 insertions, 0 deletions
diff --git a/ff.c b/ff.c
new file mode 100644
index 0000000..bcffc5d
--- /dev/null
+++ b/ff.c
@@ -0,0 +1,41 @@
+#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;
+}