if err != nil {
		return err
	}
	defer in.Close()

	perm, err := in.Stat()
	if err != nil {
		return err
	}

	out, err := os.OpenFile(filepath.Join(targetDir, targetFilename), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm.Mode())
	if err != nil {
		return err
	}
	defer out.Close()

	if _, err := io.Copy(out, in); err != nil {
		return err
	}
	return nil
}

			clear(dst)
			writePos = 0
		}
	}
}

func initLegacy() {
	// In legacy mode, logs are written to /dev/log/main
	writeFD = uintptr(open(&writePath[0], 0x1 /* O_WRONLY */, 0))
	if writeFD == 0 {
		// It is hard to do anything here. Write to stderr just
		// in case user has root on device and has run
		//	adb shell setprop log.redirect-stdio true

					// and check if that disk
					// appears in outDatedDisks.
					tamperedIndex = index
					filePath := pathJoin(erasureDisks[index].String(), bucket, object, fi.DataDir, "part.1")
					f, err := os.OpenFile(filePath, os.O_WRONLY|os.O_SYNC, 0)
					if err != nil {
						t.Fatalf("Failed to open %s: %s\n", filePath, err)
					}
					f.WriteString("oops") // Will cause bitrot error
					f.Close()
					break
				}

			}

	// This avoids build tags and works even on systems like Plan 9
	// where the file mask computation incorporates other information.
	mode := perm
	f, err := os.OpenFile(filepath.Clean(dst)+"-go-tmp-umask", os.O_WRONLY|os.O_CREATE|os.O_EXCL, perm)
	if err == nil {
		fi, err := f.Stat()
		if err == nil {
			mode = fi.Mode() & 0777
		}
		name := f.Name()
		f.Close()
		os.Remove(name)
	}

		}

		if sys.Unshareflags&CLONE_NEWUSER != 0 && sys.GidMappings != nil {
			dirfd = int(_AT_FDCWD)
			if fd1, _, err1 = RawSyscall6(SYS_OPENAT, uintptr(dirfd), uintptr(unsafe.Pointer(&psetgroups[0])), uintptr(O_WRONLY), 0, 0, 0); err1 != 0 {
				goto childerror
			}
			pid, _, err1 = RawSyscall(SYS_WRITE, fd1, uintptr(unsafe.Pointer(&setgroups[0])), uintptr(len(setgroups)))
			if err1 != 0 {
				goto childerror
			}

		" ", "")
	fname := filepath.Join(debugDir, logBase)
	if _, err := os.Stat(fname); err == nil {
		// This process previously called upload.Run
		return nil, nil
	}
	f, err := os.OpenFile(fname, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0666)
	if err != nil {
		if os.IsExist(err) {
			return nil, nil // this process previously called upload.Run
		}
		return nil, err
	}
	return f, nil

		Rand: zeroSource{}, // for example only; don't do this.
	}
	server.StartTLS()
	defer server.Close()

	// Typically the log would go to an open file:
	// w, err := os.OpenFile("tls-secrets.txt", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
	w := os.Stdout

	client := &http.Client{
		Transport: &http.Transport{
			TLSClientConfig: &tls.Config{
				KeyLogWriter: w,

	actualSize := tc.totalSize
	if tc.limitReadSize > 0 {
		if tc.limitReadSize < actualSize {
			actualSize = tc.limitReadSize
		}
	}

	f, err := os.OpenFile(os.DevNull, os.O_WRONLY, 0)
	if err != nil {
		t.Fatal(err)
	}
	defer f.Close()

	client, server := spawnTestSocketPair(t, tc.upNet)
	defer server.Close()

	}
	return "signal " + itoa.Itoa(int(s))
}

var signals = [...]string{}

// File system

const (
	Stdin  = 0
	Stdout = 1
	Stderr = 2
)

const (
	O_RDONLY = 0
	O_WRONLY = 1
	O_RDWR   = 2

	O_CREAT  = 0100
	O_CREATE = O_CREAT
	O_TRUNC  = 01000
	O_APPEND = 02000
	O_EXCL   = 0200
	O_SYNC   = 010000

	O_CLOEXEC = 0
)

const (
	F_DUPFD   = 0

		if err != nil {
			t.Errorf("FindAndHash(%s): %v", f, err)
			continue
		}
		if err := os.WriteFile(tmp, data, 0666); err != nil {
			t.Error(err)
			continue
		}
		tf, err := os.OpenFile(tmp, os.O_WRONLY, 0)
		if err != nil {
			t.Error(err)
			continue
		}
		err = Rewrite(tf, m, newID)
		err2 := tf.Close()
		if err != nil {
			t.Errorf("Rewrite(%s): %v", f, err)
			continue
		}
		if err2 != nil {