CURLINFO_OS_ERRNO(3) Library Functions Manual CURLINFO_OS_ERRNO(3)
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)
libcurl 2024-08-05 CURLINFO_OS_ERRNO(3)
curl 8.9.1 - Generated Mon Aug 12 14:44:54 CDT 2024