sendf() now deals with Curl_write() returning -1 properly, which it might

{

  struct SessionHandle *data = conn->data;

  ssize_t bytes_written;

  CURLcode result;

  ssize_t write_len;

  CURLcode res;

  char *s;

  char *sptr;

  va_list ap;

  va_start(ap, fmt);

  s = vaprintf(fmt, ap); /* returns an allocated string */

  va_end(ap);

  if(!s)

    return 0; /* failure */

    return CURLE_OUT_OF_MEMORY; /* failure */

  if(data->set.verbose)

    fprintf(data->set.err, "> %s", s);

  bytes_written=0;

  write_len = strlen(s);

  sptr = s;

  do {

    /* Write the buffer to the socket */

  result = Curl_write(conn, sockfd, s, strlen(s), &bytes_written);

    res = Curl_write(conn, sockfd, sptr, write_len, &bytes_written);

    if(CURLE_OK != res)

      break;

    if(bytes_written != write_len) {

      /* if not all was written at once, we must advance the pointer, decrease

         the size left and try again! */

      write_len -= bytes_written;

      sptr += bytes_written;

    }

    else

      break;

  } while(1);

  free(s); /* free the output string */

  return result;

  return res;

}

/*