[#OSSL_trace_get_category_name]
= OSSL&lowbar;trace&lowbar;get&lowbar;category&lowbar;name
:mrdocs:

Map an OSSL&lowbar;TRACE&lowbar;CATEGORY&lowbar;&ast; number to its canonical name string&period;

== Synopsis

Declared in `&lt;openssl&sol;trace&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
char const*
OSSL&lowbar;trace&lowbar;get&lowbar;category&lowbar;name(int num);
----

== Return Value

Category name (for example &quot;TLS&quot;), or NULL if `num` is unrecognized&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *num*
| Category number from OSSL&lowbar;trace&lowbar;get&lowbar;category&lowbar;num() or a OSSL&lowbar;TRACE&lowbar;CATEGORY&lowbar;&ast; constant&period;
|===


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