[#RAND_file_name]
= RAND_file_name
:mrdocs:

Build the default path for the PRNG seed file into a caller‐provided buffer.

== Synopsis

Declared in `<openssl/rand.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
char const*
RAND_file_name(
    char* file,
    size_t num);
----

== Return Value

Pointer to `file` on success, or NULL on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *file*
| Output buffer that receives the path (for example from RANDFILE or $HOME/.rnd).
| *num*
| Size of `file` in bytes.
|===


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