-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_forward(RSET ct, RSFD rfd, void *buf,
- int (*cmpfunc)(const void *p1, const void *p2),
- const void *untilbuf);
-static void r_pos (RSFD rfd, double *current, double *total);
-static int r_read (RSFD rfd, void *buf);
-static int r_write (RSFD rfd, const void *buf);
-
-static const struct rset_control control =