CURLINFO_OS_ERRNO (original) (raw)

CURLINFO_OS_ERRNO explained

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

curl_easy_getinfo returns a CURLcode indicating success or error.

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