mkdir /var/run/warrend incase its not there

cmd/warrend/main.go

@@ -89,6 +89,10 @@ func checkRunning() bool {
 func initRunning() {
 	// rm old sock
 	os.Remove(warren.CmdSockAddr)
+
+	// incase gone
+	os.Mkdir(warren.WarrendRunDir, 0775)
+
 	// drop down pid
 	pidfile, err := os.Create(warren.WarrendPidFile)
 	if err != nil {

lib/warren/warren.go

@@ -11,6 +11,7 @@ import (
 )
 
 const CmdSockType string = "unix"
+const WarrendRunDir string = "/var/run/warrend"
 const CmdSockAddr string = "/var/run/warrend/warrend.sock"
 const WarrendPidFile string = "/var/run/warrend/warrend.pid"
 const WarrendConf string = "/etc/warrend.json"