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cmd/syncthing: Copy config on upgrade, instead of renaming (fixes #3525)

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GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3560
This commit is contained in:
Jakob Borg 2016-09-03 21:29:32 +00:00 committed by Audrius Butkevicius
parent 49910a1d85
commit 7990ffcc60
1 changed files with 18 additions and 5 deletions
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23
cmd/syncthing/main.go
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@ -889,19 +889,32 @@ func loadOrCreateConfig() *config.Wrapper {
}
func archiveAndSaveConfig(cfg *config.Wrapper) error {
// To prevent previous config from being cleaned up, quickly touch it too
now := time.Now()
_ = os.Chtimes(cfg.ConfigPath(), now, now) // May return error on Android etc; no worries
// Copy the existing config to an archive copy
archivePath := cfg.ConfigPath() + fmt.Sprintf(".v%d", cfg.Raw().OriginalVersion)
l.Infoln("Archiving a copy of old config file format at:", archivePath)
if err := osutil.Rename(cfg.ConfigPath(), archivePath); err != nil {
if err := copyFile(cfg.ConfigPath(), archivePath); err != nil {
return err
}
// Do a regular atomic config sve
return cfg.Save()
}
func copyFile(src, dst string) error {
bs, err := ioutil.ReadFile(src)
if err != nil {
return err
}
if err := ioutil.WriteFile(dst, bs, 0600); err != nil {
// Attempt to clean up
os.Remove(dst)
return err
}
return nil
}
func startAuditing(mainService *suture.Supervisor) {
auditFile := timestampedLoc(locAuditLog)
fd, err := os.OpenFile(auditFile, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0600)