LOCALRID_GID_MIN
req->id1.idmap_id_u.gid + LOCALRID_GID_MIN;
if (rid < LOCALRID_GID_MIN)
res->id.idmap_id_u.gid = rid - LOCALRID_GID_MIN;
if (rid >= LOCALRID_GID_MIN) {
res->id.idmap_id_u.gid = rid - LOCALRID_GID_MIN;
} else if (rid >= LOCALRID_GID_MIN &&
grp = getgrgid(rid - LOCALRID_GID_MIN);
grp->gr_gid + LOCALRID_GID_MIN);