if err != nil {
		return err
	}
	_, _, e := Syscall(SYS_STATFS64, uintptr(unsafe.Pointer(p)), unsafe.Sizeof(*buf), uintptr(unsafe.Pointer(buf)))
	if e != 0 {
		err = errnoErr(e)
	}
	return
}

func Seek(fd int, offset int64, whence int) (off int64, err error) {
	_, _, e := Syscall6(SYS__LLSEEK, uintptr(fd), uintptr(offset>>32), uintptr(offset), uintptr(unsafe.Pointer(&off)), uintptr(whence), 0)
	if e != 0 {
		err = errnoErr(e)
	}

	"ReadRune":      {[]string{}, []string{"rune", "int", "error"}},                    // io.RuneReader
	"Scan":          {[]string{"=fmt.ScanState", "rune"}, []string{"error"}},           // fmt.Scanner
	"Seek":          {[]string{"=int64", "int"}, []string{"int64", "error"}},           // io.Seeker
	"UnmarshalJSON": {[]string{"[]byte"}, []string{"error"}},                           // json.Unmarshaler

//sys	pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
//sys	Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
//sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK

func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
	var ts *Timespec
	if timeout != nil {

	pr.elemEnds = make([]uint32, pr.elemEndsEnds[len(pr.elemEndsEnds)-1])
	assert(binary.Read(r, binary.LittleEndian, pr.elemEnds[:]) == nil)

	pos, err := r.Seek(0, io.SeekCurrent)
	assert(err == nil)

	pr.elemData = input[pos:]
	assert(len(pr.elemData)-8 == int(pr.elemEnds[len(pr.elemEnds)-1]))

	return pr
}

	i.next = i.rb.f.nextMain
	i.asciiF = nextASCIIString
	i.info = i.rb.f.info(i.rb.src, i.p)
	i.rb.ss.first(i.info)
}

// Seek sets the segment to be returned by the next call to Next to start
// at position p.  It is the responsibility of the caller to set p to the
// start of a segment.
func (i *Iter) Seek(offset int64, whence int) (int64, error) {
	var abs int64
	switch whence {
	case 0:
		abs = offset
	case 1:

	if err != nil {
		t.Fatal(err)
	}
	_, err = tmpfile.WriteString(content)
	if err != nil {
		t.Fatal(err)
	}
	err = tmpfile.Sync()
	if err != nil {
		t.Fatal(err)
	}
	_, err = tmpfile.Seek(0, 0)
	if err != nil {
		t.Fatal(err)
	}
	return tmpfile
}

func TestIsIstioConfigMap(t *testing.T) {
	tests := []struct {
		name   string
		obj    controllers.Object
		expect bool
	}{

//sys	pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
//sys	renameat2(olddirfd int, oldpath string, newdirfd int, newpath string, flags uint) (err error)
//sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
//sys	sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
//sys	Setfsgid(gid int) (err error)
//sys	Setfsuid(uid int) (err error)

// returns them as a string.
func readMagic(reader io.ReadSeeker) (string, error) {
	var magic [4]byte
	if _, err := reader.Read(magic[:]); err != nil {
		return "", err
	}
	if _, err := reader.Seek(0, io.SeekStart); err != nil {
		return "", err
	}
	return string(magic[:]), nil

	ESHUTDOWN - APPLICATION_ERROR:       "cannot send after transport endpoint shutdown",
	ESOCKTNOSUPPORT - APPLICATION_ERROR: "socket type not supported",
	ESPIPE - APPLICATION_ERROR:          "illegal seek",
	ESRCH - APPLICATION_ERROR:           "no such process",
	ESRMNT - APPLICATION_ERROR:          "srmount error",
	ESTALE - APPLICATION_ERROR:          "stale NFS file handle",

//sysnb	Getuid() (uid int)
//sys	Listen(s int, n int) (err error)
//sys	pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
//sys	pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
//sys	Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK

func Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error) {
	var ts *Timespec
	if timeout != nil {