type container struct {
	// path to store runtime state information
	root        string
	id          string
	bundle      string
	runtime     string
	runtimeArgs []string
	shim        string
	processes   map[string]*process
	labels      []string
	oomFds      []int
	noPivotRoot bool
	timeout     time.Duration
}

func main() {
	logrus.SetFormatter(&logrus.TextFormatter{TimestampFormat: time.RFC3339Nano})
	app := cli.NewApp()
	app.Name = "containerd"
	if containerd.GitCommit != "" {
		app.Version = fmt.Sprintf("%s commit: %s", containerd.Version, containerd.GitCommit)
	} else {
		app.Version = containerd.Version
	}
	app.Usage = usage
	app.Flags = daemonFlags
	app.Before = func(context *cli.Context) error {
		setupDumpStacksTrap()
		if context.GlobalBool("debug") {
			logrus.SetLevel(logrus.DebugLevel)
			if context.GlobalDuration("metrics-interval") > 0 {
				if err := debugMetrics(context.GlobalDuration("metrics-interval"), context.GlobalString("graphite-address")); err != nil {
					return err
				}
			}
		}
		if p := context.GlobalString("pprof-address"); len(p) > 0 {
			pprof.Enable(p)
		}
		if err := checkLimits(); err != nil {
			return err
		}
		return nil
	}
	app.Action = func(context *cli.Context) {
		if err := daemon(context); err != nil {
			logrus.Fatal(err)
		}
	}
	if err := app.Run(os.Args); err != nil {
		logrus.Fatal(err)
	}
}