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lib/model: Decrease max temp filename length (fixes #3338, fixes #3355)

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GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3356
This commit is contained in:
Jakob Borg 2016-06-27 11:47:40 +00:00
parent 3c77b8388c
commit a165838cbd
1 changed files with 6 additions and 1 deletions
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7
lib/model/tempname.go
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@ -20,6 +20,11 @@ type tempNamer struct {
var defTempNamer tempNamer var defTempNamer tempNamer
// Real filesystems usually handle 255 bytes. encfs has varying and
// confusing file name limits. We take a safe way out and switch to hashing
// quite early.
const maxFilenameLength = 160 - len(".syncthing.") - len(".tmp")
func init() { func init() {
if runtime.GOOS == "windows" { if runtime.GOOS == "windows" {
defTempNamer = tempNamer{"~syncthing~"} defTempNamer = tempNamer{"~syncthing~"}
@ -35,7 +40,7 @@ func (t tempNamer) IsTemporary(name string) bool {
func (t tempNamer) TempName(name string) string { func (t tempNamer) TempName(name string) string {
tdir := filepath.Dir(name) tdir := filepath.Dir(name)
tbase := filepath.Base(name) tbase := filepath.Base(name)
if len(tbase) > 240 { if len(tbase) > maxFilenameLength {
hash := md5.New() hash := md5.New()
hash.Write([]byte(name)) hash.Write([]byte(name))
tbase = fmt.Sprintf("%x", hash.Sum(nil)) tbase = fmt.Sprintf("%x", hash.Sum(nil))