_FCN_FSPRIV
#define _FCNO_FSPRIV(f, c) _FCN_FSPRIV(F_FSVOID, (f), (c), 0)
#define _FCNR_FSPRIV(f, c, t) _FCN_FSPRIV(F_FSIN, (f), (c), (int)sizeof(t))
#define _FCNW_FSPRIV(f, c, t) _FCN_FSPRIV(F_FSOUT, (f), (c), (int)sizeof(t))
#define _FCNRW_FSPRIV(f, c, t) _FCN_FSPRIV(F_FSINOUT, (f), (c), (int)sizeof(t))
#define LFCNIFILEFH_COMPAT2 _FCN_FSPRIV(F_FSOUT, 'L', 11, 32)