CURLOPT_TIMEOUT_MS - Man Page

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TIMEOUT_MS, long timeout);

Pass a long as parameter containing timeout - the maximum time in milliseconds that you allow the libcurl transfer operation to take.

See CURLOPT_TIMEOUT(3) for details.

0 (zero) which means it never times out during transfer.

This functionality affects all supported protocols

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");

    /* complete within 20000 milliseconds */
    curl_easy_setopt(curl, CURLOPT_TIMEOUT_MS, 20000L);

    curl_easy_perform(curl);
  }
}

Added in curl 7.16.2

curl_easy_setopt(3) returns a CURLcode indicating success or error.

CURLE_OK (0) means everything was OK, non-zero means an error occurred, see libcurl-errors(3).

CURLOPT_CONNECTTIMEOUT(3), CURLOPT_LOW_SPEED_LIMIT(3), CURLOPT_TCP_KEEPALIVE(3), CURLOPT_TIMEOUT(3)

curl_easy_setopt(3), CURLMOPT_MAX_HOST_CONNECTIONS(3), CURLMOPT_MAX_TOTAL_CONNECTIONS(3), CURLOPT_CONNECTTIMEOUT_MS(3), CURLOPT_TIMEOUT(3), libcurl-symbols(3).