static int r_forward(RSFD rfd, void *buf,
TERMID *term, const void *untilbuf);
static int r_read(RSFD rfd, void *buf, TERMID *term );
static int r_forward(RSFD rfd, void *buf,
TERMID *term, const void *untilbuf);
static int r_read(RSFD rfd, void *buf, TERMID *term );