-tcp_raw(scb)
- serial_t scb;
-{
- return; /* Always in raw mode */
-}
-
-/* Wait for input on scb, with timeout seconds. Returns 0 on success,
- otherwise SERIAL_TIMEOUT or SERIAL_ERROR.
-
- For termio{s}, we actually just setup VTIME if necessary, and let the
- timeout occur in the read() in tcp_read().
- */
-
-static int
-wait_for (scb, timeout)
- serial_t scb;
- int timeout;
-{
- int numfds;
- struct timeval tv;
- fd_set readfds, exceptfds;
-
- FD_ZERO (&readfds);
- FD_ZERO (&exceptfds);
-
- tv.tv_sec = timeout;
- tv.tv_usec = 0;
-
- FD_SET(scb->fd, &readfds);
- FD_SET(scb->fd, &exceptfds);
-
- while (1)
- {
- if (timeout >= 0)
- numfds = select(scb->fd+1, &readfds, 0, &exceptfds, &tv);
- else
- numfds = select(scb->fd+1, &readfds, 0, &exceptfds, 0);
-
- if (numfds <= 0)
- {
- if (numfds == 0)
- return SERIAL_TIMEOUT;
- else if (errno == EINTR)
- continue;
- else
- return SERIAL_ERROR; /* Got an error from select or poll */
- }
-
- return 0;
- }
-}
-
-/* Read a character with user-specified timeout. TIMEOUT is number of seconds
- to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
- char if successful. Returns -2 if timeout expired, EOF if line dropped
- dead, or -3 for any other error (see errno in that case). */
-
-static int
-tcp_readchar (scb, timeout)
- serial_t scb;
- int timeout;
-{
- int status;
-
- if (scb->bufcnt-- > 0)
- return *scb->bufp++;
-
- status = wait_for(scb, timeout);
-
- if (status < 0)
- return status;
-
- while (1)
- {
- scb->bufcnt = read(scb->fd, scb->buf, BUFSIZ);
- if (scb->bufcnt != -1 || errno != EINTR)
- break;
- }
-
- if (scb->bufcnt <= 0)
- {
- if (scb->bufcnt == 0)
- return SERIAL_TIMEOUT; /* 0 chars means timeout [may need to
- distinguish between EOF & timeouts
- someday] */
- else
- return SERIAL_ERROR; /* Got an error from read */
- }
-
- scb->bufcnt--;
- scb->bufp = scb->buf;
- return *scb->bufp++;
-}
-
-static int
-tcp_noflush_set_tty_state (scb, new_ttystate, old_ttystate)
- serial_t scb;
- serial_ttystate new_ttystate;
- serial_ttystate old_ttystate;
-{
- return 0;
-}
-
-static void
-tcp_print_tty_state (scb, ttystate)
- serial_t scb;
- serial_ttystate ttystate;
-{
- /* Nothing to print. */
- return;
-}
-
-static int
-tcp_setbaudrate(scb, rate)
- serial_t scb;
- int rate;
-{
- return 0; /* Never fails! */
-}
-
-static int
-tcp_setstopbits(scb, num)
- serial_t scb;
- int num;
-{
- return 0; /* Never fails! */
-}
-
-static int
-tcp_write(scb, str, len)
- serial_t scb;
- const char *str;
- int len;
-{
- int cc;
-
- while (len > 0)
- {
- cc = write(scb->fd, str, len);
-
- if (cc < 0)
- return 1;
- len -= cc;
- str += cc;
- }
- return 0;
-}
-
-static void
-tcp_close(scb)
- serial_t scb;