if err := groupRetry(u.Username, nameC, userGID, &gidsC, &n); err != nil {
			return nil, err
		}
	}
	gidsC = gidsC[:n]
	gids := make([]string, 0, n)
	for _, g := range gidsC[:n] {
		gids = append(gids, strconv.Itoa(int(g)))
	}
	return gids, nil
}

// groupRetry retries getGroupList with much larger size for n. The result is
// stored in gids.

	{in: testGroupFile, user: "user777", gid: "7", gids: []string{"7", "777", "1000"}},
	{in: testGroupFile, user: "user1111", gid: "1111", gids: []string{"1111", "1000"}},
	{in: testGroupFile, user: "user1000", gid: "1000", gids: []string{"1000"}},
	{in: testGroupFile, user: "user7500", gid: "7500", gids: []string{"1000", "7500"}},
	{in: testGroupFile, user: "no-such-user", gid: "2345", gids: []string{"2345"}},

//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

	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)

	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])
}

			return nil, err
		}
	}

	var uids []*runtimeapi.IDMapping
	var gids []*runtimeapi.IDMapping

	for _, u := range userNs.UIDMappings {
		uids = append(uids, &runtimeapi.IDMapping{
			HostId:      u.HostId,
			ContainerId: u.ContainerId,
			Length:      u.Length,
		})
	}
	for _, g := range userNs.GIDMappings {
		gids = append(gids, &runtimeapi.IDMapping{
			HostId:      g.HostId,

			expectedUsers: []*entry{
				{name: "foo", id: 100, gid: 110},
				{name: "bar", id: 101, gid: 111},
				{name: "baz", id: 102, gid: 112},
			},
			expectedGroups: []*entry{
				{name: "baz", id: 112},
			},
		},
	}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			err := assignUserAndGroupIDs(tc.groups, tc.usersToCreate, tc.groupsToCreate, tc.uids, tc.gids)

	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])
}

// and assigns UIDs and GIDs to the users and groups to be created based on a list of provided UIDs and GIDs.
// Returns an error if not enough UIDs or GIDs are passed. It does not perform any other validation.
func assignUserAndGroupIDs(groups, usersToCreate, groupsToCreate []*entry, uids, gids []int64) error {
	if len(gids) < len(groupsToCreate) {

	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])
}