extern int guestfs_cp (guestfs_h *handle, const char *src, const char *dest);
extern int guestfs_cp_a (guestfs_h *handle, const char *src, const char *dest);
extern int guestfs_mv (guestfs_h *handle, const char *src, const char *dest);
+extern int guestfs_drop_caches (guestfs_h *handle, int whattodrop);