#include <stdlib.h>
#include <curl/multi.h>

static const char *urls[] = {
	"http://www.microsoft.com",
	"http://www.opensource.org",
	"http://www.google.com",
	"http://www.yahoo.com",
	"http://www.ibm.com",
	"http://www.mysql.com",
	"http://www.oracle.com",
	"http://www.ripe.net",
	"http://www.iana.org",
	"http://www.amazon.com",
	"http://www.netcraft.com",
	"http://www.heise.de",
	"http://www.chip.de",
	"http://www.ca.com",
	"http://www.cnet.com",
	"http://www.news.com",
	"http://www.cnn.com",
	"http://www.wikipedia.org",
	"http://www.dell.com",
	"http://www.hp.com",
	"http://www.cert.org",
	"http://www.mit.edu",
	"http://www.nist.gov",
	"http://www.ebay.com",
	"http://www.playstation.com",
	"http://www.uefa.com",
	"http://www.ieee.org",
	"http://www.apple.com",
	"http://www.sony.com",
	"http://www.symantec.com",
	"http://www.zdnet.com",
	"http://www.fujitsu.com",
	"http://www.supermicro.com",
	"http://www.hotmail.com",
	"http://www.ecma.com",
	"http://www.bbc.co.uk",
	"http://news.google.com",
	"http://www.foxnews.com",
	"http://www.msn.com",
	"http://www.wired.com",
	"http://www.sky.com",
	"http://www.usatoday.com",
	"http://www.cbs.com",
	"http://www.nbc.com",
	"http://slashdot.org",
	"http://www.bloglines.com",
	"http://www.techweb.com",
	"http://www.newslink.org",
	"http://www.un.org",
};

#define MAX 10
#define CNT sizeof(urls)/sizeof(char*)

static int cb(char *d, size_t n, size_t l, void *p)
{
	return n*l;
}

static void init(CURLM *cm, int i)
{
	CURL *eh = curl_easy_init();
	
	curl_easy_setopt(eh, CURLOPT_WRITEFUNCTION, cb);
	curl_easy_setopt(eh, CURLOPT_HEADER, 0);
	curl_easy_setopt(eh, CURLOPT_URL, urls[i]);
	curl_easy_setopt(eh, CURLOPT_PRIVATE, urls[i]);
	
	curl_multi_add_handle(cm, eh);
}

int main(void)
{
	CURLM *cm;
	CURLMsg *msg;
	long L;
	int C, M, Q, U = -1;
	fd_set R, W, E;
	struct timeval T;
	
	curl_global_init(CURL_GLOBAL_ALL);
	
	cm = curl_multi_init();
	
	for (C = 0; C < MAX; ++C) {
		init(cm, C);
	}
	
	while (U) {
		while (CURLM_CALL_MULTI_PERFORM == curl_multi_perform(cm, &U));
		
		if (U) {
			FD_ZERO(&R);
			FD_ZERO(&W);
			FD_ZERO(&E);
			
			if (curl_multi_fdset(cm, &R, &W, &E, &M)) {
				fprintf(stderr, "E: curl_multi_fdset\n");
				return EXIT_FAILURE;
			}
			
			if (curl_multi_timeout(cm, &L)) {
				fprintf(stderr, "E: curl_multi_timeout\n");
				return EXIT_FAILURE;
			}
			
			T.tv_sec = L/1000;
			T.tv_usec = (L%1000)*1000;
			
			if (0 > select(M+1, &R, &W, &E, &T)) {
				fprintf(stderr, "E: select\n");
				return EXIT_FAILURE;
			}
		}
		
		while ((msg = curl_multi_info_read(cm, &Q))) {
			if (msg->msg == CURLMSG_DONE) {
				char *url;
				curl_easy_getinfo(msg->easy_handle, CURLINFO_PRIVATE, &url);
				fprintf(stderr, "R: %d - %s <%s>\n", msg->data.result, curl_easy_strerror(msg->data.result), url);
				curl_multi_remove_handle(cm, msg->easy_handle);
				curl_easy_cleanup(msg->easy_handle);
			} else {
				fprintf(stderr, "E: CURLMsg (%d)\n", msg->msg);
			}
			if (C < CNT) {
				init(cm, C++);
			}
		}
	}
	
	curl_multi_cleanup(cm);
	curl_global_cleanup();
	
	return EXIT_SUCCESS;
}