fn nsm_ioctl()

in src/driver/mod.rs [62:79]

• 14 lines of code
• 1 McCabe index (conditional complexity)

fn nsm_ioctl(fd: i32, message: &mut NsmMessage) -> Option<Errno> {
    let status = unsafe {
        ioctl(
            fd,
            request_code_readwrite!(NSM_IOCTL_MAGIC, 0, mem::size_of::<NsmMessage>()),
            message,
        )
    };
    let errno = Errno::last();

    match status {
        // If ioctl() succeeded, the status is the message's response code
        0 => None,

        // If ioctl() failed, the error is given by errno
        _ => Some(errno),
    }
}