+#define F_DEV link_u.idev->dev
+#define F_INODE link_u.idev->inode
+
+#define F_HEAD link_u.links->head
+#define F_NEXT link_u.links->next
+
+struct file_struct {
+ time_t modtime;
+ OFF_T length;
+ mode_t mode;
+ union {
+ DEV64_T rdev; /* The device number, if this is a device */
+ char *sum; /* Only a normal file can have a checksum */
+ char *link; /* Holds symlink string, if a symlink */
+ } u;
+ union {
+ struct idev *idev;
+ struct hlink *links;
+ } link_u;