+static void *r_create(RSET ct, const struct rset_control *sel, void *parms);
+static RSFD r_open (RSET ct, int flag);
+static void r_close (RSFD rfd);
+static void r_delete (RSET ct);
+static void r_rewind (RSFD rfd);
+static int r_count (RSET ct);
+static int r_read (RSFD rfd, void *buf, int *term_index);
+static int r_write (RSFD rfd, const void *buf);