return -d
	}
}

// Add returns the time t+d.
func (t Time) Add(d Duration) Time {
	dsec := int64(d / 1e9)
	nsec := t.nsec() + int32(d%1e9)
	if nsec >= 1e9 {
		dsec++
		nsec -= 1e9
	} else if nsec < 0 {
		dsec--
		nsec += 1e9
	}
	t.wall = t.wall&^nsecMask | uint64(nsec) // update nsec
	t.addSec(dsec)
	if t.wall&hasMonotonic != 0 {
		te := t.ext + int64(d)

	}
	if t != nil {
		*t = Time_t(tv.Sec)
	}
	return Time_t(tv.Sec), nil
}

//sys	Utime(path string, buf *Utimbuf) (err error)
//sys	utimes(path string, times *[2]Timeval) (err error)

func setTimespec(sec, nsec int64) Timespec {
	return Timespec{Sec: sec, Nsec: nsec}
}

func setTimeval(sec, usec int64) Timeval {
	return Timeval{Sec: sec, Usec: usec}
}

//sysnb	Gettimeofday(tv *Timeval) (err error)

func setTimespec(sec, nsec int64) Timespec {
	return Timespec{Sec: sec, Nsec: nsec}
}

func setTimeval(sec, usec int64) Timeval {
	return Timeval{Sec: sec, Usec: usec}
}

func futimesat(dirfd int, path string, tv *[2]Timeval) (err error) {
	if tv == nil {
		return utimensat(dirfd, path, nil, 0)
	}

//sysnb	Gettimeofday(tv *Timeval) (err error)

func setTimespec(sec, nsec int64) Timespec {
	return Timespec{Sec: sec, Nsec: nsec}
}

func setTimeval(sec, usec int64) Timeval {
	return Timeval{Sec: sec, Usec: usec}
}

func futimesat(dirfd int, path string, tv *[2]Timeval) (err error) {
	if tv == nil {
		return utimensat(dirfd, path, nil, 0)
	}

func abs(t Time) (sec, nsec int64) {
	unix := t.Unix()
	nano := t.Nanosecond()
	return unix + unixToZero, int64(nano)
}

// absString returns abs as a decimal string.
func absString(t Time) string {
	sec, nsec := abs(t)
	if sec < 0 {
		sec = -sec
		nsec = -nsec
		if nsec < 0 {
			nsec += 1e9
			sec--
		}
		return fmt.Sprintf("-%d%09d", sec, nsec)
	}

//sys	Utime(path string, buf *Utimbuf) (err error)
//sys	utimes(path string, times *[2]Timeval) (err error)

func setTimespec(sec, nsec int64) Timespec {
	return Timespec{Sec: sec, Nsec: nsec}
}

func setTimeval(sec, usec int64) Timeval {
	return Timeval{Sec: sec, Usec: usec}
}

func (r *PtraceRegs) PC() uint64 { return r.Nip }

func (r *PtraceRegs) SetPC(pc uint64) { r.Nip = pc }

		return 0, err
	}
	if t != nil {
		*t = Time_t(tv.Sec)
	}
	return Time_t(tv.Sec), nil
}

//sys	Utime(path string, buf *Utimbuf) (err error)
//sys	utimes(path string, times *[2]Timeval) (err error)

func setTimespec(sec, nsec int64) Timespec {
	return Timespec{Sec: sec, Nsec: nsec}
}

func setTimeval(sec, usec int64) Timeval {
	return Timeval{Sec: sec, Usec: int32(usec)}
}

	_, _, errno := RawSyscall(SYS_SETRLIMIT, uintptr(resource), uintptr(unsafe.Pointer(rlim)), 0)
	return errno
}

func setTimespec(sec, nsec int64) Timespec {
	return Timespec{Sec: sec, Nsec: nsec}
}

func setTimeval(sec, usec int64) Timeval {
	return Timeval{Sec: sec, Usec: usec}
}

func (r *PtraceRegs) PC() uint64 { return r.Nip }

func (r *PtraceRegs) SetPC(pc uint64) { r.Nip = pc }

	var ts *Timespec
	if timeout != nil {
		ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
	}
	return pselect(nfd, r, w, e, ts, nil)
}

//sysnb	Gettimeofday(tv *Timeval) (err error)

func setTimespec(sec, nsec int64) Timespec {
	return Timespec{Sec: sec, Nsec: nsec}
}

func setTimeval(sec, usec int64) Timeval {
	return Timeval{Sec: sec, Usec: usec}
}

	var ts *Timespec
	if timeout != nil {
		ts = &Timespec{Sec: timeout.Sec, Nsec: timeout.Usec * 1000}
	}
	return pselect(nfd, r, w, e, ts, nil)
}

//sysnb	Gettimeofday(tv *Timeval) (err error)

func setTimespec(sec, nsec int64) Timespec {
	return Timespec{Sec: sec, Nsec: nsec}
}

func setTimeval(sec, usec int64) Timeval {
	return Timeval{Sec: sec, Usec: usec}
}