"XXLAND",
	"XXLANDC",
	"XXLEQV",
	"XXLNAND",
	"XXLOR",
	"XXLORC",
	"XXLNOR",
	"XXLORQ",
	"XXLXOR",
	"XXSEL",
	"XXMRGHW",
	"XXMRGLW",
	"XXSPLTW",
	"XXSPLTIB",
	"XXPERM",
	"XXPERMDI",
	"XXSLDWI",
	"XXBRQ",
	"XXBRD",
	"XXBRW",
	"XXBRH",
	"XSCVDPSP",
	"XSCVSPDP",
	"XSCVDPSPN",
	"XSCVSPDPN",
	"XVCVDPSP",
	"XVCVSPDP",
	"XSCVDPSXDS",

#include <sys/mman.h>
#include <sys/thread.h>
#include <sys/resource.h>

#include <unistd.h>
#include <fcntl.h>
#include <pthread.h>
#include <semaphore.h>
*/
import "C"

const (
	_EPERM     = C.EPERM
	_ENOENT    = C.ENOENT
	_EINTR     = C.EINTR
	_EAGAIN    = C.EAGAIN
	_ENOMEM    = C.ENOMEM
	_EACCES    = C.EACCES
	_EFAULT    = C.EFAULT
	_EINVAL    = C.EINVAL
	_ETIMEDOUT = C.ETIMEDOUT

func readRawConn(c syscall.RawConn, b []byte) (int, error) {
	var operr error
	var n int
	err := c.Read(func(s uintptr) bool {
		n, operr = syscall.Read(int(s), b)
		if operr == syscall.EAGAIN {
			return false
		}
		return true
	})
	if err != nil {
		return n, err
	}
	return n, operr
}

func writeRawConn(c syscall.RawConn, b []byte) error {
	var operr error
	err := c.Write(func(s uintptr) bool {

	if err != nil {
		t.Fatal(err)
	}

	var operr error
	err = wconn.Write(func(s uintptr) bool {
		_, operr = syscall.Write(syscallDescriptor(s), []byte{'b'})
		return operr != syscall.EAGAIN
	})
	if err != nil {
		t.Fatal(err)
	}
	if operr != nil {
		t.Fatal(err)
	}

	var n int
	buf := make([]byte, 1)
	err = rconn.Read(func(s uintptr) bool {
		n, operr = syscall.Read(syscallDescriptor(s), buf)

	var operr error
	err := c.Write(func(s uintptr) bool {
		var written uint32
		var buf syscall.WSABuf
		buf.Buf = &b[0]
		buf.Len = uint32(len(b))
		operr = syscall.WSASend(syscall.Handle(s), &buf, 1, &written, 0, nil, nil)
		return true
	})
	if err != nil {
		return err
	}
	return operr
}

func controlRawConn(c syscall.RawConn, addr Addr) error {
	var operr error
	fn := func(s uintptr) {

		isPermissionTest{err: &fs.PathError{Err: syscall.EACCES}, want: true},
		isPermissionTest{err: &fs.PathError{Err: syscall.EPERM}, want: true},
		isPermissionTest{err: &fs.PathError{Err: syscall.EEXIST}, want: false},

		isPermissionTest{err: &os.LinkError{Err: syscall.EACCES}, want: true},
		isPermissionTest{err: &os.LinkError{Err: syscall.EPERM}, want: true},
		isPermissionTest{err: &os.LinkError{Err: syscall.EEXIST}, want: false},

                    } else if (userAgent.indexOf("Safari") >= 0) {
                        uaType = UserAgentType.SAFARI;
                    } else if (userAgent.indexOf("Opera") >= 0) {
                        uaType = UserAgentType.OPERA;
                    }
                }
                if (uaType == null) {
                    uaType = UserAgentType.OTHER;
                }

	}

	// Mimicking exec.findExecutable here.
	// ENOSYS means Eaccess is not available or not implemented.
	// EPERM can be returned by Linux containers employing seccomp.
	// In both cases, fall back to checking the permission bits.
	err := unix.Eaccess(filepath.Join(dir, de.Name()), unix.X_OK)
	if (err == syscall.ENOSYS || err == syscall.EPERM) && info.Mode()&0111 != 0 {
		err = nil
	}
	if err != nil {
		return "", false
	}

			// See issue #42334.
			//
			// If the file is on NFS, we can see EOPNOTSUPP.
			// See issue #40731.
			//
			// If the process is running inside a Docker container,
			// we might see EPERM instead of ENOSYS. See issue
			// #40893. Since EPERM might also be a legitimate error,
			// don't mark copy_file_range(2) as unsupported.
			return 0, false, nil
		case nil:
			if n == 0 {
				// If we did not read any bytes at all,

	if err != nil {
		return nil, err
	}
	defer syscall.CertFreeCertificateChain(topCtx)

	chain, topErr := verifyChain(c, topCtx, opts)
	if topErr == nil {
		chains = append(chains, chain)
	}

	if lqCtxCount := topCtx.LowerQualityChainCount; lqCtxCount > 0 {
		lqCtxs := unsafe.Slice(topCtx.LowerQualityChains, lqCtxCount)