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
}
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")
}