6 int getgrouplist(const char *, gid_t, gid_t *, int *);
7 int setgroups(size_t, const gid_t *);
9 int initgroups(const char *user, gid_t gid)
11 gid_t groups[NGROUPS_MAX];
12 int count = NGROUPS_MAX;
13 if (getgrouplist(user, gid, groups, &count) < 0) return -1;
14 return setgroups(count, groups);