// renameFile attempts to rename an existing file to a destination
// and set the right attributes on it.
func (p *rwFolder) renameFile(source, target protocol.FileInfo) {
var err error
events.Default.Log(events.ItemStarted, map[string]string{
"folder": p.folder,
"item": source.Name,
"type": "file",
"action": "delete",
})
events.Default.Log(events.ItemStarted, map[string]string{
"folder": p.folder,
"item": target.Name,
"type": "file",
"action": "update",
})
defer func() {
events.Default.Log(events.ItemFinished, map[string]interface{}{
"folder": p.folder,
"item": source.Name,
"error": events.Error(err),
"type": "file",
"action": "delete",
})
events.Default.Log(events.ItemFinished, map[string]interface{}{
"folder": p.folder,
"item": target.Name,
"error": events.Error(err),
"type": "file",
"action": "update",
})
}()
l.Debugln(p, "taking rename shortcut", source.Name, "->", target.Name)
from := filepath.Join(p.dir, source.Name)
to := filepath.Join(p.dir, target.Name)
if p.versioner != nil {
err = osutil.Copy(from, to)
if err == nil {
err = osutil.InWritableDir(p.versioner.Archive, from)
}
} else {
err = osutil.TryRename(from, to)
}
if err == nil {
// The file was renamed, so we have handled both the necessary delete
// of the source and the creation of the target. Fix-up the metadata,
// and update the local index of the target file.
p.dbUpdates <- dbUpdateJob{source, dbUpdateDeleteFile}
err = p.shortcutFile(target)
if err != nil {
l.Infof("Puller (folder %q, file %q): rename from %q metadata: %v", p.folder, target.Name, source.Name, err)
p.newError(target.Name, err)
return
}
p.dbUpdates <- dbUpdateJob{target, dbUpdateHandleFile}
} else {
// We failed the rename so we have a source file that we still need to
// get rid of. Attempt to delete it instead so that we make *some*
// progress. The target is unhandled.
err = osutil.InWritableDir(osutil.Remove, from)
if err != nil {
l.Infof("Puller (folder %q, file %q): delete %q after failed rename: %v", p.folder, target.Name, source.Name, err)
p.newError(target.Name, err)
return
}
p.dbUpdates <- dbUpdateJob{source, dbUpdateDeleteFile}
}
}
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/hernad/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)
}
/*
This doesn't in fact work. Sometimes it appears to. We need to get this sorted...
// 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")
}