{call: "Setgroups([]int{0,1,2,3})", fn: func() error { return syscall.Setgroups([]int{0, 1, 2, 3}) }, filter: "Groups:", expect: "\t0 1 2 3"},
		{call: "Setgroups(nil)", fn: func() error { return syscall.Setgroups(nil) }, filter: "Groups:", expect: ""},
		{call: "Setgroups([]int{0})", fn: func() error { return syscall.Setgroups([]int{0}) }, filter: "Groups:", expect: "\t0"},

	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])
}

/*
 * Socket
 */

	if n < 1 {
		return "", EINVAL
	}
	return string(buf[:n]), nil
}

/*
 * Wrapped
 */

//sysnb	getgroups(ngid int, gid *_Gid_t) (n int, err error)
//sysnb	setgroups(ngid int, gid *_Gid_t) (err error)

func Getgroups() (gids []int, err error) {
	n, err := getgroups(0, nil)
	if err != nil {
		return nil, err
	}
	if n == 0 {
		return nil, nil
	}

        given: "a managed type that uses a read-write Set of strings"
        buildScript '''
            @Managed
            interface User {
                Set<String> getGroups()
                void setGroups(Set<String> groups)
            }

            model {
                user(User) {
                    def sortedSet = new TreeSet(['users', 'general'])
                    groups = sortedSet

	if err == nil {
		i := 0
		for buf[i] != 0 {
			i++
		}
		n = i + 1
	}
	return
}

//sysnb	getgroups(ngid int, gid *_Gid_t) (n int, err error)
//sysnb	setgroups(ngid int, gid *_Gid_t) (err error)

func Getgroups() (gids []int, err error) {
	n, err := getgroups(0, nil)
	if err != nil {
		return nil, err
	}
	if n == 0 {
		return nil, nil
	}

            permissions = null;
            return true;
        }

        public AuthenticationResult getAuthenticationResult() {
            return authResult;
        }

        public void setGroups(final String[] groups) {
            this.groups = groups;
        }

        public void setRoles(final String[] roles) {
            this.roles = roles;
        }
    }

//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
//sysnb	setgroups(n int, list *_Gid_t) (err error)
//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)

//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
//sysnb	setgroups(n int, list *_Gid_t) (err error)
//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)

//sys	bind(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sys	connect(s int, addr unsafe.Pointer, addrlen _Socklen) (err error)
//sysnb	getgroups(n int, list *_Gid_t) (nn int, err error)
//sysnb	setgroups(n int, list *_Gid_t) (err error)
//sys	getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) (err error)

//go:cgo_import_dynamic libc_fork fork "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_ioctl ioctl "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_setgid setgid "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_setgroups setgroups "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_setrlimit setrlimit "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_setsid setsid "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_setuid setuid "libc.a/shr_64.o"