var value ICMPv6Filter
	vallen := _Socklen(SizeofICMPv6Filter)
	err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
	return &value, err
}

func GetsockoptUcred(fd, level, opt int) (*Ucred, error) {
	var value Ucred
	vallen := _Socklen(SizeofUcred)
	err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
	return &value, err
}

	var value IPMreqn
	vallen := _Socklen(SizeofIPMreqn)
	err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
	return &value, err
}

func GetsockoptUcred(fd, level, opt int) (*Ucred, error) {
	var value Ucred
	vallen := _Socklen(SizeofUcred)
	err := getsockopt(fd, level, opt, unsafe.Pointer(&value), &vallen)
	return &value, err
}

		{"GetsockoptIPMreqn", Func, 0},
		{"GetsockoptIPv6MTUInfo", Func, 2},
		{"GetsockoptIPv6Mreq", Func, 0},
		{"GetsockoptInet4Addr", Func, 0},
		{"GetsockoptInt", Func, 0},
		{"GetsockoptUcred", Func, 1},
		{"Gettid", Func, 0},
		{"Gettimeofday", Func, 0},
		{"Getuid", Func, 0},
		{"Getwd", Func, 0},
		{"Getxattr", Func, 1},
		{"HANDLE_FLAG_INHERIT", Const, 0},