a1

printf("performing curl multi...\n");
  curl_multi_perform(curlmulti, &curl_running);
  printf("initial curl_running = %d\n", curl_running);
  do {
    png_structp png_ptr;
    png_infop info_ptr;

    int rc;
    CURLMcode mc;

    fd_set read_fd_set;
    fd_set write_fd_set;
    fd_set exc_fd_set;
    int max_fd = -1;
    struct timeval timeout;

    FD_ZERO(&read_fd_set);
    FD_ZERO(&write_fd_set);
    FD_ZERO(&exc_fd_set);

    //Need to change from here

    long curl_timeo = -1;

    timeout.tv_sec = 1;
    timeout.tv_usec = 0;

    curl_multi_timeout(curlmulti, &curl_timeo);
    if(curl_timeo >= 0) {
      timeout.tv_sec = curl_timeo / 1000;
      if(timeout.tv_sec > 1)
        timeout.tv_sec = 1;
      else
        timeout.tv_usec = (curl_timeo % 1000) * 1000;
    }

    //Need to change to here


    mc = curl_multi_fdset(curlmulti, &read_fd_set, &write_fd_set,
                          &exc_fd_set, &max_fd); //NOT WORKING
    printf("mc is %d, max_fd is %d, curl_running is %d\n",
      (int)mc, max_fd, curl_running);