r0, _, e1 := syscall.Syscall(procGetDynamicTimeZoneInformation.Addr(), 1, uintptr(unsafe.Pointer(dtzi)), 0, 0)
	rc = uint32(r0)
	if rc == 0xffffffff {
		if e1 != 0 {
			err = error(e1)
		} else {
			err = syscall.EINVAL
		}
	}
	return

			t.Fatalf("failed to read from the file: %v", err)
		}

		if !hook.called || hook.written != 0 || hook.handled || hook.err != nil {
			t.Fatalf("poll.CopyFileRange should be called and return the EINVAL error, but got hook.called=%t, hook.err=%v", hook.called, hook.err)
		}

		// Rewind it.
		if _, err := f.Seek(0, io.SeekStart); err != nil {
			t.Fatalf("failed to rewind the file: %v", err)
		}

		}
		pid, _, err1 = RawSyscall(SYS_READ, uintptr(mapPipe[0]), uintptr(unsafe.Pointer(&err2)), unsafe.Sizeof(err2))
		if err1 != 0 {
			goto childerror
		}
		if pid != unsafe.Sizeof(err2) {
			err1 = EINVAL
			goto childerror
		}
		if err2 != 0 {
			err1 = err2
			goto childerror
		}
	}

	// Session ID
	if sys.Setsid {
		_, _, err1 = RawSyscall(SYS_SETSID, 0, 0, 0)
		if err1 != 0 {

	{17, "EEXIST", "file exists"},
	{18, "EXDEV", "invalid cross-device link"},
	{19, "ENODEV", "no such device"},
	{20, "ENOTDIR", "not a directory"},
	{21, "EISDIR", "is a directory"},
	{22, "EINVAL", "invalid argument"},
	{23, "ENFILE", "too many open files in system"},
	{24, "EMFILE", "too many open files"},
	{25, "ENOTTY", "inappropriate ioctl for device"},
	{26, "ETXTBSY", "text file busy"},

	{17, "EEXIST", "file exists"},
	{18, "EXDEV", "invalid cross-device link"},
	{19, "ENODEV", "no such device"},
	{20, "ENOTDIR", "not a directory"},
	{21, "EISDIR", "is a directory"},
	{22, "EINVAL", "invalid argument"},
	{23, "ENFILE", "too many open files in system"},
	{24, "EMFILE", "too many open files"},
	{25, "ENOTTY", "inappropriate ioctl for device"},
	{26, "ETXTBSY", "text file busy"},

	{17, "EEXIST", "file exists"},
	{18, "EXDEV", "invalid cross-device link"},
	{19, "ENODEV", "no such device"},
	{20, "ENOTDIR", "not a directory"},
	{21, "EISDIR", "is a directory"},
	{22, "EINVAL", "invalid argument"},
	{23, "ENFILE", "too many open files in system"},
	{24, "EMFILE", "too many open files"},
	{25, "ENOTTY", "inappropriate ioctl for device"},
	{26, "ETXTBSY", "text file busy"},

	{17, "EEXIST", "file exists"},
	{18, "EXDEV", "invalid cross-device link"},
	{19, "ENODEV", "no such device"},
	{20, "ENOTDIR", "not a directory"},
	{21, "EISDIR", "is a directory"},
	{22, "EINVAL", "invalid argument"},
	{23, "ENFILE", "too many open files in system"},
	{24, "EMFILE", "too many open files"},
	{25, "ENOTTY", "inappropriate ioctl for device"},
	{26, "ETXTBSY", "text file busy"},

	EHOSTDOWN       = Errno(0x40)
	EHOSTUNREACH    = Errno(0x41)
	EIDRM           = Errno(0x5a)
	EILSEQ          = Errno(0x5c)
	EINPROGRESS     = Errno(0x24)
	EINTR           = Errno(0x4)
	EINVAL          = Errno(0x16)
	EIO             = Errno(0x5)
	EISCONN         = Errno(0x38)
	EISDIR          = Errno(0x15)
	ELAST           = Errno(0x6a)
	ELOOP           = Errno(0x3e)
	EMFILE          = Errno(0x18)

	EHOSTDOWN       = Errno(0x50)
	EHOSTUNREACH    = Errno(0x51)
	EIDRM           = Errno(0x24)
	EILSEQ          = Errno(0x74)
	EINPROGRESS     = Errno(0x37)
	EINTR           = Errno(0x4)
	EINVAL          = Errno(0x16)
	EIO             = Errno(0x5)
	EISCONN         = Errno(0x4b)
	EISDIR          = Errno(0x15)
	EL2HLT          = Errno(0x2c)
	EL2NSYNC        = Errno(0x26)
	EL3HLT          = Errno(0x27)

	EHOSTDOWN       = Errno(0x70)
	EHOSTUNREACH    = Errno(0x71)
	EIDRM           = Errno(0x2b)
	EILSEQ          = Errno(0x54)
	EINPROGRESS     = Errno(0x73)
	EINTR           = Errno(0x4)
	EINVAL          = Errno(0x16)
	EIO             = Errno(0x5)
	EISCONN         = Errno(0x6a)
	EISDIR          = Errno(0x15)
	EISNAM          = Errno(0x78)
	EKEYEXPIRED     = Errno(0x7f)
	EKEYREJECTED    = Errno(0x81)