[#ENGINE_get_id]
= ENGINE_get_id
:mrdocs:

Return the unique identifier string of an ENGINE (deprecated).

== Synopsis

Declared in `<openssl/engine.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[deprecated]]
char const*
ENGINE_get_id(xref:ENGINE.adoc[ENGINE] const* e);
----

[WARNING]
====
https://en.cppreference.com/cpp/language/attributes/deprecated[Deprecated^]. Use of this entity is allowed but discouraged.
====
== Return Value

NUL‐terminated id (do not free), or NULL if unset.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *e*
| ENGINE to query.
|===


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