[#RAND_write_file]
= RAND_write_file
:mrdocs:

Write a seed file containing entropy from the CSPRNG for later RAND_load_file() use.

== Synopsis

Declared in `<openssl/rand.h>`

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

== Return Value

Number of bytes written, or ‐1 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *file*
| Path of the seed file to create or overwrite.
|===


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