internal static extern int ioctlMmc(int fd, LinuxIoctl request, ref MmcIocCmd value);
internal static extern int ioctlInt(int fd, LinuxIoctl request, out int value);
internal static extern int ioctlSg(int fd, LinuxIoctl request, ref SgIoHdrT value);
internal static extern int ioctlMmcMulti(int fd, LinuxIoctl request, IntPtr value);