[#ERR_set_error]
= ERR_set_error
:mrdocs:

Set library, reason, and optional formatted auxiliary data on the current error entry.

== Synopsis

Declared in `<openssl/err.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
ERR_set_error(
    int lib,
    int reason,
    char const* fmt, ...);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *lib*
| ERR_LIB_* library number for the error.
| *reason*
| Reason code within `lib` (or errno when `lib` is ERR_LIB_SYS).
| *fmt*
| printf‐style format for extra data, or NULL for none; remaining arguments match `fmt` when non‐NULL.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#