Update list command and created methods

We don't need a CreatedTime method on the container because it's not
part of the interface and can be received via the state.  We also do not
need to call it CreateTime because the type of this field is time.Time
so we know its time.

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

list.go

@@ -12,72 +12,60 @@ import (
 
 	"github.com/Sirupsen/logrus"
 	"github.com/codegangsta/cli"
+	"github.com/opencontainers/runc/libcontainer"
 )
 
 var listCommand = cli.Command{
 	Name:  "list",
 	Usage: "lists containers started by runc with the given root",
 	Action: func(context *cli.Context) {
-
-		// preload the container factory
-		if factory == nil {
-			err := factoryPreload(context)
-			if err != nil {
-				logrus.Fatal(err)
-				return
-			}
+		factory, err := loadFactory(context)
+		if err != nil {
+			logrus.Fatal(err)
 		}
-
 		// get the list of containers
 		root := context.GlobalString("root")
 		absRoot, err := filepath.Abs(root)
 		if err != nil {
 			logrus.Fatal(err)
-			return
 		}
 		list, err := ioutil.ReadDir(absRoot)
-
+		if err != nil {
+			logrus.Fatal(err)
+		}
 		w := tabwriter.NewWriter(os.Stdout, 12, 1, 3, ' ', 0)
 		fmt.Fprint(w, "ID\tPID\tSTATUS\tCREATED\n")
-
 		// output containers
 		for _, item := range list {
-			switch {
-			case !item.IsDir():
-				// do nothing with misc files in the containers directory
-			case item.IsDir():
-				outputListInfo(item.Name(), w)
+			if item.IsDir() {
+				if err := outputListInfo(item.Name(), factory, w); err != nil {
+					logrus.Fatal(err)
+				}
 			}
 		}
-
 		if err := w.Flush(); err != nil {
 			logrus.Fatal(err)
 		}
 	},
 }
 
-func outputListInfo(id string, w *tabwriter.Writer) {
+func outputListInfo(id string, factory libcontainer.Factory, w *tabwriter.Writer) error {
 	container, err := factory.Load(id)
 	if err != nil {
-		logrus.Fatal(err)
-		return
+		return err
 	}
-
 	containerStatus, err := container.Status()
 	if err != nil {
-		logrus.Fatal(err)
-		return
+		return err
 	}
-
 	state, err := container.State()
 	if err != nil {
-		logrus.Fatal(err)
-		return
+		return err
 	}
-
-	fmt.Fprintf(w, "%s\t%d\t%s\t%s\n", container.ID(),
+	fmt.Fprintf(w, "%s\t%d\t%s\t%s\n",
+		container.ID(),
 		state.BaseState.InitProcessPid,
 		containerStatus.String(),
-		state.BaseState.CreatedTime.Format(time.RFC3339Nano))
-
+		state.BaseState.Created.Format(time.RFC3339Nano))
+	return nil
 }