ALLOWED_CHILD1_UGID
ensure_user_exists(ALLOWED_CHILD1_UGID);
ensure_group_exists(ALLOWED_CHILD1_UGID);
test_setuid(ALLOWED_CHILD1_UGID, true);
test_setgid(ALLOWED_CHILD1_UGID, true);
gid_t allowed_supp_groups[2] = {ALLOWED_CHILD1_UGID, ALLOWED_CHILD2_UGID};