+/**
+ * Copy \a size bytes from file \a src to \a dst.
+ *
+ * \param src Source KFile.
+ * \param dst Destionation KFile.
+ * \param size number of bytes to copy.
+ * \return the number of bytes copied.
+ */
+kfile_off_t kfile_copy(KFile *src, KFile *dst, kfile_off_t size);
+