Beispiel #1
0
func (p *rwFolder) moveForConflict(name string) error {
	if p.maxConflicts == 0 {
		if err := osutil.Remove(name); err != nil && !os.IsNotExist(err) {
			return err
		}
		return nil
	}

	ext := filepath.Ext(name)
	withoutExt := name[:len(name)-len(ext)]
	newName := withoutExt + time.Now().Format(".sync-conflict-20060102-150405") + ext
	err := os.Rename(name, newName)
	if os.IsNotExist(err) {
		// We were supposed to move a file away but it does not exist. Either
		// the user has already moved it away, or the conflict was between a
		// remote modification and a local delete. In either way it does not
		// matter, go ahead as if the move succeeded.
		err = nil
	}
	if p.maxConflicts > -1 {
		matches, gerr := osutil.Glob(withoutExt + ".sync-conflict-????????-??????" + ext)
		if gerr == nil && len(matches) > p.maxConflicts {
			sort.Sort(sort.Reverse(sort.StringSlice(matches)))
			for _, match := range matches[p.maxConflicts:] {
				gerr = osutil.Remove(match)
				if gerr != nil {
					l.Debugln(p, "removing extra conflict", gerr)
				}
			}
		} else if gerr != nil {
			l.Debugln(p, "globbing for conflicts", gerr)
		}
	}
	return err
}
Beispiel #2
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
}
Beispiel #3
0
func (v Staggered) expire(versions []string) {
	l.Debugln("Versioner: Expiring versions", versions)
	for _, file := range v.toRemove(versions, time.Now()) {
		if fi, err := osutil.Lstat(file); err != nil {
			l.Warnln("versioner:", err)
			continue
		} else if fi.IsDir() {
			l.Infof("non-file %q is named like a file version", file)
			continue
		}

		if err := osutil.Remove(file); err != nil {
			l.Warnf("Versioner: can't remove %q: %v", file, err)
		}
	}
}
Beispiel #4
0
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 hierarchy
					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")
}