} else {
			t.Skipf("skipping: %v", err)
		}
	}

	gids, err := user.GroupIds()
	if err != nil {
		t.Fatalf("%+v.GroupIds(): %v", user, err)
	}
	if !containsID(gids, user.Gid) {
		t.Errorf("%+v.GroupIds() = %v; does not contain user GID %s", user, gids, user.Gid)
	}
}

func containsID(ids []string, id string) bool {
	for _, x := range ids {
		if x == id {
			return true
		}
	}
	return false

func libc_getgrouplist_trampoline()

func Getgrouplist(name *byte, gid uint32, gids *uint32, n *int32) error {
	_, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_getgrouplist_trampoline),
		uintptr(unsafe.Pointer(name)), uintptr(gid), uintptr(unsafe.Pointer(gids)),
		uintptr(unsafe.Pointer(n)), 0, 0)
	if errno != 0 {
		return errno
	}
	return nil
}

const (

func Getegid() int { return syscall.Getegid() }

// Getgroups returns a list of the numeric ids of groups that the caller belongs to.
//
// On Windows, it returns [syscall.EWINDOWS]. See the [os/user] package
// for a possible alternative.
func Getgroups() ([]int, error) {
	gids, e := syscall.Getgroups()
	return gids, NewSyscallError("getgroups", e)
}

// Exit causes the current program to exit with the given status code.

    }

    /**
     * This method is used to generate stable GIDs and must be stable for identical contents.
     * Returning a constant value is ok but will make the generated project order-dependent.
     */
    public int stableHash() {
        return 0;
    }

    @Override
    public String toString() {
        return String.format("%s isa=%s gid=%s", super.toString(), isa(), getGlobalID());
    }

    /**

	n, err = getgroups(n, &a[0])
	if err != nil {
		return nil, err
	}
	gids = make([]int, n)
	for i, v := range a[0:n] {
		gids[i] = int(v)
	}
	return
}

func Setgroups(gids []int) (err error) {
	if len(gids) == 0 {
		return setgroups(0, nil)
	}

	a := make([]_Gid_t, len(gids))
	for i, v := range gids {
		a[i] = _Gid_t(v)
	}
	return setgroups(len(a), &a[0])
}

/*

	n, err = getgroups(n, &a[0])
	if err != nil {
		return nil, err
	}
	gids = make([]int, n)
	for i, v := range a[0:n] {
		gids[i] = int(v)
	}
	return
}

func Setgroups(gids []int) (err error) {
	if len(gids) == 0 {
		return setgroups(0, nil)
	}

	a := make([]_Gid_t, len(gids))
	for i, v := range gids {
		a[i] = _Gid_t(v)
	}
	return setgroups(len(a), &a[0])
}

    }

    /**
     * Generate a stable GID based on the class name and hash of some object info.
     *
     * GIDs generated this way will be in the form of
     * {@code <class-name-hash-32> <obj-hash-32> <counter-32>}
     */
    public String generateGid(String pbxClassName, int hash) {
        int counter = 0;
        String gid;
        do {

	n, err = getgroups(n, &a[0])
	if n == -1 {
		return nil, err
	}
	gids = make([]int, n)
	for i, v := range a[0:n] {
		gids[i] = int(v)
	}
	return
}

func Setgroups(gids []int) (err error) {
	if len(gids) == 0 {
		return setgroups(0, nil)
	}

	a := make([]_Gid_t, len(gids))
	for i, v := range gids {
		a[i] = _Gid_t(v)
	}
	return setgroups(len(a), &a[0])
}

		}
		return EACCES
	}

	var fmode uint32
	if uint32(uid) == st.Uid {
		fmode = (st.Mode >> 6) & 7
	} else {
		var gid int
		if flags&_AT_EACCESS != 0 {
			gid = Getegid()
		} else {
			gid = Getgid()
		}

		if uint32(gid) == st.Gid || isGroupMember(int(st.Gid)) {
			fmode = (st.Mode >> 3) & 7
		} else {
			fmode = st.Mode & 7
		}
	}

	if fmode&mode == mode {
		return nil

	return nil
}

func Getpagesize() int { return 0x1000 }

func Getegid() (egid int) { return -1 }
func Geteuid() (euid int) { return -1 }
func Getgid() (gid int)   { return -1 }
func Getuid() (uid int)   { return -1 }

func Getgroups() (gids []int, err error) {
	return make([]int, 0), nil
}

//sys	open(path string, mode int) (fd int, err error)

func Open(path string, mode int) (fd int, err error) {