Fcntl

s32 Fcntl(
     s32 s,
     s32 cmd,
     s32 val
);

	Name	Description
in	s	Specifies a socket descriptor. Specify a socket descriptor created using the `Socket` or `Accept` function.
in	cmd	Specifies what to do with the status flags. `F_GETFL`: Read the status flags. `F_SETFL`: Change the status flags.
in	val	Specifies additional arguments required for certain actions. If cmd is `F_GETFL`, there are no additional arguments required and this argument is ignored. If cmd is `F_SETFL`, this specifies the status flags to set. This is either `0` or a bitwise OR of the following values. `O_NONBLOCK`: Sets the socket to non-blocking mode. If this flag is not specified, the socket enters blocking mode. Note that sockets are set to blocking mode by default at time of creation.

Returns 0 if successful.

Sets or gets socket status flags.

`nn::socket::Fcntl` Function