[#BIO_socket_ioctl]
= BIO_socket_ioctl
:mrdocs:

Perform an ioctl on a socket descriptor with BIO error reporting.

== Synopsis

Declared in `<openssl/bio.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
BIO_socket_ioctl(
    int fd,
    long type,
    void* arg);
----

== Return Value

0 on success, or ‐1 on error (OpenSSL error stack updated).

== Parameters

[cols="1,4"]
|===
| Name| Description
| *fd*
| Socket file descriptor.
| *type*
| ioctl request code.
| *arg*
| Request‐specific argument pointer.
|===


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