curl/docs/libcurl/opts/CURLOPT_PRIVATE.md
Daniel Stenberg e3fe020089
docs/libcurl: generate PROTOCOLS from meta-data
Remove the PROTOCOLS section from the source files completely and
instead generate them based on the header data in the curldown files.

It also generates TLS backend information for options marked for TLS as
protocol.

Closes #13175
2024-03-23 18:13:03 +01:00

71 lines
1.3 KiB
Markdown

---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Title: CURLOPT_PRIVATE
Section: 3
Source: libcurl
See-also:
- CURLINFO_PRIVATE (3)
- CURLOPT_STDERR (3)
- CURLOPT_VERBOSE (3)
Protocol:
- All
---
# NAME
CURLOPT_PRIVATE - store a private pointer
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PRIVATE, void *pointer);
~~~
# DESCRIPTION
Pass a void * as parameter, pointing to data that should be associated with
this curl handle. The pointer can subsequently be retrieved using
curl_easy_getinfo(3) with the CURLINFO_PRIVATE(3) option. libcurl itself
never does anything with this data.
# DEFAULT
NULL
# EXAMPLE
~~~c
struct private {
void *custom;
};
int main(void)
{
CURL *curl = curl_easy_init();
struct private secrets;
if(curl) {
struct private *extracted;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* store a pointer to our private struct */
curl_easy_setopt(curl, CURLOPT_PRIVATE, &secrets);
curl_easy_perform(curl);
/* we can extract the private pointer again too */
curl_easy_getinfo(curl, CURLINFO_PRIVATE, &extracted);
}
}
~~~
# AVAILABILITY
Added in 7.10.3
# RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.