add functions/vendor files

vendor/github.com/opencontainers/runc/start.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/opencontainers/runc/libcontainer"
+	"github.com/urfave/cli"
+)
+
+var startCommand = cli.Command{
+	Name:  "start",
+	Usage: "executes the user defined process in a created container",
+	ArgsUsage: `<container-id>
+
+Where "<container-id>" is your name for the instance of the container that you
+are starting. The name you provide for the container instance must be unique on
+your host.`,
+	Description: `The start command executes the user defined process in a created container.`,
+	Action: func(context *cli.Context) error {
+		if err := checkArgs(context, 1, exactArgs); err != nil {
+			return err
+		}
+		container, err := getContainer(context)
+		if err != nil {
+			return err
+		}
+		status, err := container.Status()
+		if err != nil {
+			return err
+		}
+		switch status {
+		case libcontainer.Created:
+			return container.Exec()
+		case libcontainer.Stopped:
+			return errors.New("cannot start a container that has stopped")
+		case libcontainer.Running:
+			return errors.New("cannot start an already running container")
+		default:
+			return fmt.Errorf("cannot start a container in the %s state\n", status)
+		}
+	},
+}