[#BIO_push]
= BIO_push
:mrdocs:

Append `append` to the filter chain rooted at `b` and return the new head.

== Synopsis

Declared in `<openssl/bio.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BIO.adoc[BIO]*
BIO_push(
    xref:BIO.adoc[BIO]* b,
    xref:BIO.adoc[BIO]* append);
----

== Return Value

`b` (unchanged head pointer).

== Parameters

[cols="1,4"]
|===
| Name| Description
| *b*
| Head of the existing BIO chain.
| *append*
| BIO to link after the tail of `b's` chain.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#