static void r_delete(RSET ct);
static void r_pos(RSFD rfd, double *current, double *total);
static int r_read(RSFD rfd, void *buf, TERMID *term);
static void r_delete(RSET ct);
static void r_pos(RSFD rfd, double *current, double *total);
static int r_read(RSFD rfd, void *buf, TERMID *term);