[#ASYNC_WAIT_CTX_get_fd]
= ASYNC_WAIT_CTX_get_fd
:mrdocs:

Look up the wait file descriptor registered under `key.`

== Synopsis

Declared in `<openssl/async.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
ASYNC_WAIT_CTX_get_fd(
    xref:ASYNC_WAIT_CTX.adoc[ASYNC_WAIT_CTX]* ctx,
    void const* key,
    int* fd,
    void** custom_data);
----

== Return Value

1 if a matching fd was found, or 0 otherwise.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Wait context to query.
| *key*
| Unique key previously passed to ASYNC_WAIT_CTX_set_wait_fd.
| *fd*
| Receives the registered OSSL_ASYNC_FD on success.
| *custom_data*
| Receives the custom_data pointer registered with the fd, or NULL.
|===


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