[#ERR_peek_error_line]
= ERR_peek_error_line
:mrdocs:

Peek at the earliest error and optionally return its source file and line.

== Synopsis

Declared in `<openssl/err.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
unsigned long
ERR_peek_error_line(
    char const** file,
    int* line);
----

== Return Value

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

== Parameters

[cols="1,4"]
|===
| Name| Description
| *file*
| Receives the source file name, or unchanged if NULL.
| *line*
| Receives the source line number, or unchanged if NULL.
|===


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