/*
#include <unistd.h>
#include <sys/types.h>
#include <grp.h>

static int mygetgrouplist(const char* user, gid_t group, gid_t* groups, int* ngroups) {
	return getgrouplist(user, group, groups, ngroups);
}
*/
import "C"

func getGroupList(name *_C_char, userGID _C_gid_t, gids *_C_gid_t, n *_C_int) _C_int {
	return C.mygetgrouplist(name, userGID, gids, n)

// license that can be found in the LICENSE file.

//go:build !osusergo && darwin

package user

import (
	"internal/syscall/unix"
)

func getGroupList(name *_C_char, userGID _C_gid_t, gids *_C_gid_t, n *_C_int) _C_int {
	err := unix.Getgrouplist(name, userGID, gids, n)
	if err != nil {
		return -1
	}
	return 0

	groupList, err = getGroupList(t, server)
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	assert.Equal(t, 0, len(groupList.Groups))
}

func TestDiscoveryOrdering(t *testing.T) {
	handler := NewRootAPIsHandler(DefaultAddresses{DefaultAddress: "192.168.1.1"}, codecs)

	server := httptest.NewServer(handler)
	groupList, err := getGroupList(t, server)
	if err != nil {

	}
	userGID := _C_gid_t(ug)
	nameC := make([]byte, len(u.Username)+1)
	copy(nameC, u.Username)

	n := _C_int(256)
	gidsC := make([]_C_gid_t, n)
	rv := getGroupList((*_C_char)(unsafe.Pointer(&nameC[0])), userGID, &gidsC[0], &n)
	if rv == -1 {
		// Mac is the only Unix that does not set n properly when rv == -1, so
		// we need to use different logic for Mac vs. the other OS's.

// license that can be found in the LICENSE file.

package unix

import (
	"internal/abi"
	"syscall"
	"unsafe"
)

//go:cgo_import_dynamic libc_getgrouplist getgrouplist "/usr/lib/libSystem.B.dylib"
func libc_getgrouplist_trampoline()

func Getgrouplist(name *byte, gid uint32, gids *uint32, n *int32) error {
	_, _, errno := syscall_syscall6(abi.FuncPCABI0(libc_getgrouplist_trampoline),

            searchPaging(data, form);
        });
    }

    protected void searchPaging(final RenderData data, final SearchForm form) {
        RenderDataUtil.register(data, "groupItems", groupService.getGroupList(groupPager)); // page navi

        // restore from pager
        copyBeanToBean(groupPager, form, op -> op.include("id"));
    }

public class GroupService {

    @Resource
    protected GroupBhv groupBhv;

    @Resource
    protected FessConfig fessConfig;

    @Resource
    protected UserBhv userBhv;

    public List<Group> getGroupList(final GroupPager groupPager) {

        final PagingResultBean<Group> groupList = groupBhv.selectPage(cb -> {
            cb.paging(groupPager.getPageSize(), groupPager.getCurrentPageNumber());

One is written in pure Go and parses /etc/passwd and /etc/group. The other
is cgo-based and relies on the standard C library (libc) routines such as
getpwuid_r, getgrnam_r, and getgrouplist.

When cgo is available, and the required routines are implemented in libc
for a particular platform, cgo-based (libc-backed) code is used.
This can be overridden by using osusergo build tag, which enforces

        validateApi(body, messages -> {});
        final GroupPager pager = copyBeanToNewBean(body, GroupPager.class);
        final List<Group> list = groupService.getGroupList(pager);
        return asJson(
                new ApiResult.ApiConfigsResponse<EditBody>().settings(list.stream().map(this::createEditBody).collect(Collectors.toList()))