NAME

       CURLINFO_OS_ERRNO - get errno number from last connect failure

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_OS_ERRNO, long *errnop);

DESCRIPTION

       Pass  a pointer to a long to receive the errno variable from a connect failure.  Note that
       the value is only set on failure, it is not reset upon a successful operation. The  number
       is OS and system specific.

       libcurl  network-related  errors  that  may have a saved errno are: CURLE_COULDNT_CONNECT,
       CURLE_FAILED_INIT,  CURLE_INTERFACE_FAILED,  CURLE_OPERATION_TIMEDOUT,   CURLE_RECV_ERROR,
       CURLE_SEND_ERROR.

       Since  8.8.0  libcurl clears the easy handle's saved errno before performing the transfer.
       Prior versions did not clear the saved errno, which means if a saved errno is retrieved it
       could be from a previous transfer on the same handle.

PROTOCOLS

       This functionality affects all supported protocols

EXAMPLE

       int main(void)
       {
         CURL *curl = curl_easy_init();
         if(curl) {
           CURLcode res;
           curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
           res = curl_easy_perform(curl);
           if(res != CURLE_OK) {
             long error;
             res = curl_easy_getinfo(curl, CURLINFO_OS_ERRNO, &error);
             if(!res && error) {
               printf("Errno: %ld\n", error);
             }
           }
           curl_easy_cleanup(curl);
         }
       }

AVAILABILITY

       Added in curl 7.12.2

RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       curl_easy_getinfo(3), curl_easy_setopt(3)