some reordering into server.go; added effective group changing;

app/server/server.go

@@ -113,7 +113,7 @@ func (srv *Server) Configure() error {
 	return err
 }
 
-func (srv *Server) WriteStat() error {
+func (srv *Server) writeStat() error {
 	// Write status file
 	var err error
 	statefilePath := filepath.Join(srv.conf.Datadir, "server.yaml")
@@ -128,7 +128,7 @@ func (srv *Server) WriteStat() error {
 	return err
 }
 
-func (srv *Server) ReadStat() error {
+func (srv *Server) readStat() error {
 	var err error
 	// Read state file
 	statefilePath := filepath.Join(srv.conf.Datadir, "server.yaml")
@@ -148,10 +148,7 @@ func (srv *Server) ReadStat() error {
 
 func (srv *Server) Build() error {
 	var err error
-	srv.logg.Infof("Server building")
-
-	confDump := srv.conf.String()
-	srv.logg.Infof("Current server configuration is:\n%s\n", confDump)
+	//srv.logg.Infof("Server building")
 
 	usr, err := user.Lookup(srv.conf.RunUser)
 	if err != nil {
@@ -168,6 +165,20 @@ func (srv *Server) Build() error {
 	uid := int(uid64)
 	gid := int(gid64)
 
+	// Creating datadir
+	datadir := srv.conf.Datadir
+	if !auxtool.DirExists(datadir) { // TODO: check access to dir
+		srv.logg.Infof("Creating data directory %s ", datadir)
+		err = os.MkdirAll(datadir, 0750)
+		if err != nil {
+			return err
+		}
+	}
+	err = os.Chown(datadir, uid, gid)
+	if err != nil {
+		return err
+	}
+
 	if srv.conf.AsDaemon {
 		logdir := filepath.Dir(srv.conf.Logpath)
 		srv.logg.Infof("Creating log directory %s", logdir)
@@ -189,25 +200,28 @@ func (srv *Server) Build() error {
 		if err != nil {
 			return err
 		}
-	}
-
-	// Creating datadir
-	datadir := srv.conf.Datadir
-	if !auxtool.DirExists(datadir) { // TODO: check access to dir
-		srv.logg.Infof("Creating data directory %s ", datadir)
-		err = os.MkdirAll(datadir, 0750)
+		// Redirect stderr and stout
+		logFile, err := os.OpenFile(srv.conf.Logpath, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0640)
 		if err != nil {
 			return err
 		}
+		err = syscall.Dup2(int(logFile.Fd()), int(os.Stdout.Fd()))
+		if err != nil {
+			return err
+		}
+		err = syscall.Dup2(int(logFile.Fd()), int(os.Stderr.Fd()))
+		if err != nil {
+			return err
+		}
+		srv.logf = logFile
 	}
-	err = os.Chown(datadir, uid, gid)
-	if err != nil {
-		return err
-	}
+
+	confDump := srv.conf.String()
+	srv.logg.Infof("Current server configuration is:\n%s\n", confDump)
 
 	// Read state file
 	srv.logg.Infof("Reading server status")
-	err = srv.ReadStat()
+	err = srv.readStat()
 	if err != nil {
 		return err
 	}
@@ -218,7 +232,6 @@ func (srv *Server) Build() error {
 	if err != nil {
 		return err
 	}
-
 	// Creating storage dir
 	srv.logg.Infof("Creating storage directory")
 	datadir = srv.conf.Database.Basepath
@@ -239,12 +252,15 @@ func (srv *Server) Build() error {
 	}
 	srv.listen = listener
 
-	// Change effective user
+	// Change effective user amd group
 	err = syscall.Setuid(uid)
 	if err != nil {
 		return err
 	}
-
+	err = syscall.Setgid(gid)
+	if err != nil {
+		return err
+	}
 	uidstr := strconv.FormatInt(int64(syscall.Geteuid()), 10)
 	usr, err = user.LookupId(uidstr)
 	if err != nil {
@@ -272,7 +288,7 @@ func (srv *Server) Build() error {
 		srv.stat.SchemeCreated = true
 		srv.stat.SchemeCreatedAt = auxtool.TimeNow()
 		srv.logg.Infof("Writing server status")
-		err = srv.WriteStat()
+		err = srv.writeStat()
 		if err != nil {
 			return err
 		}
@@ -287,7 +303,7 @@ func (srv *Server) Build() error {
 		srv.stat.AnonymousCreated = true
 		srv.stat.AnonymousCreatedAt = auxtool.TimeNow()
 		srv.logg.Infof("Writing server status")
-		err = srv.WriteStat()
+		err = srv.writeStat()
 		if err != nil {
 			return err
 		}
@@ -302,7 +318,7 @@ func (srv *Server) Build() error {
 		srv.stat.InituserCreated = true
 
 		srv.logg.Infof("Writing server status")
-		err = srv.WriteStat()
+		err = srv.writeStat()
 		if err != nil {
 			return err
 		}
@@ -386,20 +402,6 @@ func (srv *Server) Run() error {
 		if err != nil {
 			return err
 		}
-		// Redirect stderr and stout
-		logFile, err := os.OpenFile(srv.conf.Logpath, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0640)
-		if err != nil {
-			return err
-		}
-		err = syscall.Dup2(int(logFile.Fd()), int(os.Stdout.Fd()))
-		if err != nil {
-			return err
-		}
-		err = syscall.Dup2(int(logFile.Fd()), int(os.Stderr.Fd()))
-		if err != nil {
-			return err
-		}
-		srv.logf = logFile
 		// Write process ID
 		pidFile, err := os.OpenFile(srv.conf.Runpath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0640)
 		if err != nil {

cmd/mstored/starter/starter.go

@@ -57,6 +57,7 @@ func (sta *Starter) run(cmd *cobra.Command, args []string) error {
 	if err != nil {
 		return err
 	}
+
 	err = srv.Build()
 	if err != nil {
 		return err