type RtMsghdr struct {
	Msglen   uint16
	Version  uint8
	Type     uint8
	Hdrlen   uint16
	Index    uint16
	Tableid  uint16
	Priority uint8
	Mpls     uint8
	Addrs    int32
	Flags    int32
	Fmask    int32
	Pid      int32
	Seq      int32
	Errno    int32
	Inits    uint32
	Rmx      RtMetrics
}

type RtMetrics struct {
	Pksent   uint64
	Expire   int64
	Locks    uint32

type RtMsghdr struct {
	Msglen   uint16
	Version  uint8
	Type     uint8
	Hdrlen   uint16
	Index    uint16
	Tableid  uint16
	Priority uint8
	Mpls     uint8
	Addrs    int32
	Flags    int32
	Fmask    int32
	Pid      int32
	Seq      int32
	Errno    int32
	Inits    uint32
	Rmx      RtMetrics
}

type RtMetrics struct {
	Pksent   uint64
	Expire   int64
	Locks    uint32

}

type RtMsghdr struct {
	Msglen  uint16
	Version uint8
	Type    uint8
	Index   uint16
	_       uint16
	Flags   int32
	Addrs   int32
	Pid     int32
	Seq     int32
	Errno   int32
	Fmask   int32
	Inits   uint64
	Rmx     RtMetrics
}

type RtMetrics struct {
	Locks    uint64
	Mtu      uint64
	Hopcount uint64
	Expire   uint64
	Recvpipe uint64
	Sendpipe uint64

}

type RtMsghdr struct {
	Msglen  uint16
	Version uint8
	Type    uint8
	Index   uint16
	_       uint16
	Flags   int32
	Addrs   int32
	Pid     int32
	Seq     int32
	Errno   int32
	Fmask   int32
	Inits   uint64
	Rmx     RtMetrics
}

type RtMetrics struct {
	Locks    uint64
	Mtu      uint64
	Hopcount uint64
	Expire   uint64
	Recvpipe uint64
	Sendpipe uint64

	"math"
	"math/bits"
)

// Mask allows filtering by a bitset mask.
type Mask uint64

const (
	// MaskAll is the mask for all entries.
	MaskAll Mask = math.MaxUint64
)

// MaskFromMaskable extracts mask from an interface.
func MaskFromMaskable(m Maskable) Mask {
	return Mask(m.Mask())
}

// Contains returns whether *all* flags in other is present in t.
func (t Mask) Contains(other Mask) bool {
	return t&other == other

	assert(q == 1.0, "q")
	assert(r == 2.0, "r")

	assert(s == "a", "s")
	assert(t == "b", "t")

	assert(abit == 1, "abit")
	assert(amask == 0, "amask")
	assert(bbit == 2, "bbit")
	assert(bmask == 1, "bmask")
	assert(cbit == 4, "cbit")
	assert(cmask == 3, "cmask")

	"path"
	"syscall"
	"testing"
)

// Based on `man getumask` a vaporware GNU extension to glibc.
// returns file mode creation mask.
func getUmask() int {
	mask := syscall.Umask(0)
	syscall.Umask(mask)
	return mask
}

// Tests if the directory and file creations happen with proper umask.
func TestIsValidUmaskVol(t *testing.T) {
	tmpPath := t.TempDir()
	testCases := []struct {
		volName       string
		expectedUmask int

				score, tmask = adjustScore(mayadj, score, tmask)
			}
			if pflag&ParamFeedsIndirectCall != 0 {
				score, tmask = adjustScore(mustadj, score, tmask)
			}
		}
	}

	cs.Score, cs.ScoreMask = score, tmask
}

func adjustScore(typ scoreAdjustTyp, score int, mask scoreAdjustTyp) (int, scoreAdjustTyp) {

	if isMust(typ) {
		if mask&typ != 0 {
			return score, mask
		}

// takes any other value.
func ConstantTimeCopy(v int, x, y []byte) {
	if len(x) != len(y) {
		panic("subtle: slices have different lengths")
	}

	xmask := byte(v - 1)
	ymask := byte(^(v - 1))
	for i := 0; i < len(x); i++ {
		x[i] = x[i]&xmask | y[i]&ymask
	}
}

// ConstantTimeLessOrEq returns 1 if x <= y and 0 otherwise.
// Its behavior is undefined if x or y are negative or > 2**31 - 1.

	// Do not use tg.parallel; avoid other tests seeing umask manipulation.
	mask := syscall.Umask(0077) // prohibit low bits
	defer syscall.Umask(mask)

	tg := testgo(t)
	defer tg.cleanup()
	tg.tempFile("x.go", `package main; func main() {}`)

	// We have set a umask, but if the parent directory happens to have a default
	// ACL, the umask may be ignored. To prevent spurious failures from an ACL,