[#BIO_new_file]
= BIO_new_file
:mrdocs:

Open `filename` and wrap it in a BIO_s_file() BIO.

== Synopsis

Declared in `<openssl/bio.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BIO.adoc[BIO]*
BIO_new_file(
    char const* filename,
    char const* mode);
----

== Return Value

New file BIO, or NULL on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *filename*
| Path to open.
| *mode*
| stdio‐style mode string (for example "r" or "w").
|===


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