c->running = TRUE;          /* now, we're running */

  if(!c->running &&    /* read from a file */                                                              
     c->newsession &&  /* clean session cookies */                                                         
     !co->expires) {   /* this is a session cookie since it doesn't expire! */                             
    freecookie(co);
    return NULL;
  }       

#include <stdio.h>
#include <curl/curl.h>

int main(void)
{
    curl_global_init(CURL_GLOBAL_ALL);

    // Create a share object to share cookies
    CURLSH *share = curl_share_init();
    curl_share_setopt(share, CURLSHOPT_SHARE, CURL_LOCK_DATA_COOKIE);

    // Create the easy handle
    CURL *curl = curl_easy_init();
    curl_easy_setopt(curl, CURLOPT_SHARE, share);

    // Set options
    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
    curl_easy_setopt(curl, CURLOPT_URL, "http://localhost:8001/echo.cgi");

    // Activate cookie engine
    curl_easy_setopt(curl, CURLOPT_COOKIEFILE, "");

    // Set a cookie without Max-age or Expires
    curl_easy_setopt(curl, CURLOPT_COOKIELIST, "Set-Cookie: c1=v1; domain=localhost");

    // Perform the HTTP request
    CURLcode res;
    res = curl_easy_perform(curl);
    if (res != CURLE_OK) {
        fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
    }

    // Cleanup
    curl_easy_cleanup(curl);
    curl_share_cleanup(share);
    curl_global_cleanup();

    return 0;
}