[#ENGINE_CMD_DEFN]
= ENGINE&lowbar;CMD&lowbar;DEFN
:mrdocs:

Describes one ENGINE&hyphen;specific control command for ENGINE&lowbar;set&lowbar;cmd&lowbar;defns()&period;

== Synopsis

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

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef xref:ENGINE_CMD_DEFN_st.adoc[ENGINE&lowbar;CMD&lowbar;DEFN&lowbar;st] ENGINE&lowbar;CMD&lowbar;DEFN;
----

== Description

Arrays of these are null&hyphen;terminated&colon; the last element has cmd&lowbar;num 0 and&sol;or cmd&lowbar;name NULL&period; Entries must be ordered by increasing cmd&lowbar;num&period;


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