#ifndef __HDAPS_H__
#define __HDAPS_H__
-#define HDAPS_ERROR -1
+#include <stdio.h>
+
+#define HDAPS_ERROR -1
#define HDAPS_OFF 0
+#define HDAPS_ON 1
#define UNLOAD_HEADS_FMT "/sys/block/%s/device/unload_heads"
/* The most devices we'll consider. Gotta stop somewhere. */