return err
		}
	}

	var lsa syscall.Sockaddr
	var err error
	if laddr != nil {
		if lsa, err = laddr.sockaddr(fd.family); err != nil {
			return err
		} else if lsa != nil {
			if err = syscall.Bind(fd.pfd.Sysfd, lsa); err != nil {
				return os.NewSyscallError("bind", err)
			}
		}
	}
	var rsa syscall.Sockaddr  // remote address from the user
	var crsa syscall.Sockaddr // remote address we actually connected to

	}
	for i := range probes {
		s, err := sysSocket(syscall.AF_INET6, syscall.SOCK_STREAM, syscall.IPPROTO_TCP)
		if err != nil {
			continue
		}
		defer poll.CloseFunc(s)
		syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, probes[i].value)
		sa, err := probes[i].laddr.sockaddr(syscall.AF_INET6)
		if err != nil {
			continue
		}
		if err := syscall.Bind(s, sa); err != nil {
			continue
		}
		if i == 0 {

// syscall.CertFreeCertificateContext.
func createStoreContext(leaf *Certificate, opts *VerifyOptions) (*syscall.CertContext, error) {
	var storeCtx *syscall.CertContext

	leafCtx, err := syscall.CertCreateCertificateContext(syscall.X509_ASN_ENCODING|syscall.PKCS_7_ASN_ENCODING, &leaf.Raw[0], uint32(len(leaf.Raw)))
	if err != nil {
		return nil, err
	}
	defer syscall.CertFreeCertificateContext(leafCtx)

			}
			return nil, err
		}
		nerr, err := getsockoptIntFunc(fd.pfd.Sysfd, syscall.SOL_SOCKET, syscall.SO_ERROR)
		if err != nil {
			return nil, os.NewSyscallError("getsockopt", err)
		}
		switch err := syscall.Errno(nerr); err {
		case syscall.EINPROGRESS, syscall.EALREADY, syscall.EINTR:
		case syscall.EISCONN:
			return nil, nil
		case syscall.Errno(0):
			// The runtime poller can wake us up spuriously;

	case syscall.FILETYPE_DIRECTORY:
		fs.mode |= ModeDir
	case syscall.FILETYPE_SOCKET_DGRAM:
		fs.mode |= ModeSocket
	case syscall.FILETYPE_SOCKET_STREAM:
		fs.mode |= ModeSocket
	case syscall.FILETYPE_SYMBOLIC_LINK:
		fs.mode |= ModeSymlink
	}
}

// For testing.
func atime(fi FileInfo) time.Time {
	st := fi.Sys().(*syscall.Stat_t)
	return time.Unix(0, int64(st.Atime))

// void errstr(int8 *buf, int32 len)
TEXT errstr<>(SB),NOSPLIT,$0
	MOVQ    $41, BP
	SYSCALL
	RET

// func errstr() string
// Only used by package syscall.
// Grab error string due to a syscall made
// in entersyscall mode, without going
// through the allocator (issue 4994).
// See ../syscall/asm_plan9_amd64.s:/·Syscall/
TEXT runtime·errstr(SB),NOSPLIT,$16-16
	get_tls(AX)
	MOVQ	g(AX), BX
	MOVQ	g_m(BX), BX

	err := fd.pfd.SetsockoptInt(syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, boolint(keepalive))
	runtime.KeepAlive(fd)
	return wrapSyscallError("setsockopt", err)
}

func setLinger(fd *netFD, sec int) error {
	var l syscall.Linger
	if sec >= 0 {
		l.Onoff = 1
		l.Linger = int32(sec)
	} else {
		l.Onoff = 0
		l.Linger = 0
	}
	err := fd.pfd.SetsockoptLinger(syscall.SOL_SOCKET, syscall.SO_LINGER, &l)
	runtime.KeepAlive(fd)

	syscall.Entersyscall()
	r, errno := realSyscall(trap, a1, a2, a3, a4, a5, a6, 0, 0, 0)
	syscall.Exitsyscall()
	return r, 0, syscall.Errno(errno)
}

func Syscall9(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err syscall.Errno) {
	syscall.Entersyscall()
	r, errno := realSyscall(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9)
	syscall.Exitsyscall()
	return r, 0, syscall.Errno(errno)
}

	"internal/testenv"
	"os"
	"os/exec"
	"path/filepath"
	"strings"
	"syscall"
	"testing"
)

func TestOpen_Dir(t *testing.T) {
	dir := t.TempDir()

	h, err := syscall.Open(dir, syscall.O_RDONLY, 0)
	if err != nil {
		t.Fatalf("Open failed: %v", err)
	}
	syscall.CloseHandle(h)
	h, err = syscall.Open(dir, syscall.O_RDONLY|syscall.O_TRUNC, 0)
	if err == nil {
		t.Error("Open should have failed")
	} else {

	return readInt(buf, unsafe.Offsetof(syscall.Dirent{}.Namlen), unsafe.Sizeof(syscall.Dirent{}.Namlen))
}

func direntType(buf []byte) FileMode {
	off := unsafe.Offsetof(syscall.Dirent{}.Type)
	if off >= uintptr(len(buf)) {
		return ^FileMode(0) // unknown
	}
	typ := buf[off]
	switch typ {
	case syscall.DT_BLK:
		return ModeDevice
	case syscall.DT_CHR:
		return ModeDevice | ModeCharDevice
	case syscall.DT_DIR:
		return ModeDir