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syncthing
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Use leveldb database lock for concurrent upgrade protection (fixes #703) 

Doesn't work if config directories are different though
This commit is contained in:
Audrius Butkevicius 2014-09-17 23:19:23 +01:00
parent 928198bbfe
commit e3bcfa17f8
1 changed files with 16 additions and 9 deletions
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25
cmd/syncthing/main.go
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@ -223,6 +223,15 @@ func main() {
return
}
confDir = expandTilde(confDir)
if info, err := os.Stat(confDir); err == nil && !info.IsDir() {
l.Fatalln("Config directory", confDir, "is not a directory")
}
// Ensure that our home directory exists.
ensureDir(confDir, 0700)
if doUpgrade || doUpgradeCheck {
rel, err := upgrade.LatestRelease(strings.Contains(Version, "-beta"))
if err != nil {
@ -237,6 +246,12 @@ func main() {
l.Infof("Upgrade available (current %q < latest %q)", Version, rel.Tag)
if doUpgrade {
// Use leveldb database locks to protect against concurrent upgrades
_, err = leveldb.OpenFile(filepath.Join(confDir, "index"), &opt.Options{CachedOpenFiles: 100})
if err != nil {
l.Fatalln("Cannot upgrade, database seems to be locked. Is another copy of Syncthing already running?")
}
err = upgrade.UpgradeTo(rel, GoArchExtra)
if err != nil {
l.Fatalln("Upgrade:", err) // exits 1
@ -253,12 +268,6 @@ func main() {
return
}
confDir = expandTilde(confDir)
if info, err := os.Stat(confDir); err == nil && !info.IsDir() {
l.Fatalln("Config directory", confDir, "is not a directory")
}
if os.Getenv("STNORESTART") != "" {
syncthingMain()
} else {
@ -300,9 +309,7 @@ func syncthingMain() {
}
}
// Ensure that our home directory exists and that we have a certificate and key.
ensureDir(confDir, 0700)
// Ensure that that we have a certificate and key.
cert, err = loadCert(confDir, "")
if err != nil {
newCertificate(confDir, "")