pop3-multi.c

/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at https://curl.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 * SPDX-License-Identifier: curl
 *
 ***************************************************************************/
 
/* <DESC>
 * Get POP3 email using the multi interface
 * </DESC>
 */
 
#include <stdio.h>
#include <string.h>
#include <curl/curl.h>
 
/* This is a simple example showing how to retrieve mail using libcurl's POP3
 * capabilities. It builds on the pop3-retr.c example to demonstrate how to use
 * libcurl's multi interface.
 */
 
int main(void)
{
  CURLcode res;
  CURL *curl;
 
  res = curl_global_init(CURL_GLOBAL_ALL);
  if(res)
    return (int)res;
 
  curl = curl_easy_init();
  if(curl) {
    CURLM *multi;
 
    multi = curl_multi_init();
    if(multi) {
      int still_running = 1;
 
      /* Set username and password */
      curl_easy_setopt(curl, CURLOPT_USERNAME, "user");
      curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret");
 
      /* This retrieves message 1 from the user's mailbox */
      curl_easy_setopt(curl, CURLOPT_URL, "pop3://pop.example.com/1");
 
      /* Tell the multi stack about our easy handle */
      curl_multi_add_handle(multi, curl);
 
      do {
        CURLMcode mc = curl_multi_perform(multi, &still_running);
 
        if(still_running)
          /* wait for activity, timeout or "nothing" */
          mc = curl_multi_poll(multi, NULL, 0, 1000, NULL);
 
        if(mc)
          break;
 
      } while(still_running);
 
      /* Always cleanup */
      curl_multi_remove_handle(multi, curl);
      curl_multi_cleanup(multi);
    }
    curl_easy_cleanup(curl);
  }
 
  curl_global_cleanup();
 
  return 0;
}

Notice