예제 #1
0
func (t *Trashcan) cleanoutArchive() error {
	versionsDir := filepath.Join(t.folderPath, ".stversions")
	if _, err := osutil.Lstat(versionsDir); os.IsNotExist(err) {
		return nil
	}

	cutoff := time.Now().Add(time.Duration(-24*t.cleanoutDays) * time.Hour)
	currentDir := ""
	filesInDir := 0
	walkFn := func(path string, info os.FileInfo, err error) error {
		if err != nil {
			return err
		}

		if info.IsDir() {
			// We have entered a new directory. Lets check if the previous
			// directory was empty and try to remove it. We ignore failure for
			// the time being.
			if currentDir != "" && filesInDir == 0 {
				osutil.Remove(currentDir)
			}
			currentDir = path
			filesInDir = 0
			return nil
		}

		if info.ModTime().Before(cutoff) {
			// The file is too old; remove it.
			osutil.Remove(path)
		} else {
			// Keep this file, and remember it so we don't unnecessarily try
			// to remove this directory.
			filesInDir++
		}
		return nil
	}

	if err := filepath.Walk(versionsDir, walkFn); err != nil {
		return err
	}

	// The last directory seen by the walkFn may not have been removed as it
	// should be.
	if currentDir != "" && filesInDir == 0 {
		osutil.Remove(currentDir)
	}
	return nil
}
예제 #2
0
파일: util.go 프로젝트: kattunga/syncthing
func alterFiles(dir string) error {
	err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
		if os.IsNotExist(err) {
			// Something we deleted. Never mind.
			return nil
		}

		info, err = os.Stat(path)
		if err != nil {
			// Something we deleted while walking. Ignore.
			return nil
		}

		if strings.HasPrefix(filepath.Base(path), "test-") {
			return nil
		}

		switch filepath.Base(path) {
		case ".stfolder":
			return nil
		case ".stversions":
			return nil
		}

		// File structure is base/x/xy/xyz12345...
		// comps == 1: base (don't touch)
		// comps == 2: base/x (must be dir)
		// comps == 3: base/x/xy (must be dir)
		// comps  > 3: base/x/xy/xyz12345... (can be dir or file)

		comps := len(strings.Split(path, string(os.PathSeparator)))

		r := rand.Intn(10)
		switch {
		case r == 0 && comps > 2:
			// Delete every tenth file or directory, except top levels
			return removeAll(path)

		case r == 1 && info.Mode().IsRegular():
			if info.Mode()&0200 != 0200 {
				// Not owner writable. Fix.
				if err = os.Chmod(path, 0644); err != nil {
					return err
				}
			}

			// Overwrite a random kilobyte of every tenth file
			fd, err := os.OpenFile(path, os.O_RDWR, 0644)
			if err != nil {
				return err
			}
			if info.Size() > 1024 {
				_, err = fd.Seek(rand.Int63n(info.Size()), os.SEEK_SET)
				if err != nil {
					return err
				}
			}
			_, err = io.Copy(fd, io.LimitReader(cr.Reader, 1024))
			if err != nil {
				return err
			}
			return fd.Close()

		// Change capitalization
		case r == 2 && comps > 3 && rand.Float64() < 0.2:
			if runtime.GOOS == "darwin" || runtime.GOOS == "windows" {
				// Syncthing is currently broken for case-only renames on case-
				// insensitive platforms.
				// https://github.com/syncthing/syncthing/issues/1787
				return nil
			}

			base := []rune(filepath.Base(path))
			for i, r := range base {
				if rand.Float64() < 0.5 {
					base[i] = unicode.ToLower(r)
				} else {
					base[i] = unicode.ToUpper(r)
				}
			}
			newPath := filepath.Join(filepath.Dir(path), string(base))
			if newPath != path {
				return osutil.TryRename(path, newPath)
			}

		// Switch between files and directories
		case r == 3 && comps > 3 && rand.Float64() < 0.2:
			if !info.Mode().IsRegular() {
				err = removeAll(path)
				if err != nil {
					return err
				}
				d1 := []byte("I used to be a dir: " + path)
				err := ioutil.WriteFile(path, d1, 0644)
				if err != nil {
					return err
				}
			} else {
				err := osutil.Remove(path)
				if err != nil {
					return err
				}
				err = os.MkdirAll(path, 0755)
				if err != nil {
					return err
				}
				generateFiles(path, 10, 20, "../LICENSE")
			}
			return err

			/*
				This fails. Bug?

					// Rename the file, while potentially moving it up in the directory hiearachy
					case r == 4 && comps > 2 && (info.Mode().IsRegular() || rand.Float64() < 0.2):
						rpath := filepath.Dir(path)
						if rand.Float64() < 0.2 {
							for move := rand.Intn(comps - 1); move > 0; move-- {
								rpath = filepath.Join(rpath, "..")
							}
						}
						return osutil.TryRename(path, filepath.Join(rpath, randomName()))
			*/
		}

		return nil
	})
	if err != nil {
		return err
	}

	return generateFiles(dir, 25, 20, "../LICENSE")
}