[#ERR_peek_last_error_data]
= ERR_peek_last_error_data
:mrdocs:

Peek at the newest error and optionally return auxiliary data and flags.

== Synopsis

Declared in `<openssl/err.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
unsigned long
ERR_peek_last_error_data(
    char const** data,
    int* flags);
----

== Return Value

Newest error code, or 0 if the queue is empty (queue unchanged).

== Parameters

[cols="1,4"]
|===
| Name| Description
| *data*
| Receives optional auxiliary data, or unchanged if NULL.
| *flags*
| Receives ERR_TXT_* flags for `data,` or unchanged if NULL.
|===


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