Update shim for exec

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

supervisor/add_process.go

@@ -1,5 +1,7 @@
 package supervisor
 
+import "time"
+
 type AddProcessEvent struct {
 	s *Supervisor
 }
@@ -7,32 +9,23 @@ type AddProcessEvent struct {
 // TODO: add this to worker for concurrent starts???  maybe not because of races where the container
 // could be stopped and removed...
 func (h *AddProcessEvent) Handle(e *Event) error {
-	/*
-		start := time.Now()
-		ci, ok := h.s.containers[e.ID]
-		if !ok {
-			return ErrContainerNotFound
-		}
-			p, io, err := h.s.runtime.StartProcess(ci.container, *e.Process, e.Console)
-			if err != nil {
-				return err
-			}
-			if e.Pid, err = p.Pid(); err != nil {
-				return err
-			}
-			h.s.processes[e.Pid] = &containerInfo{
-				container: ci.container,
-			}
-			l, err := h.s.copyIO(e.Stdin, e.Stdout, e.Stderr, io)
-			if err != nil {
-				// log the error but continue with the other commands
-				logrus.WithFields(logrus.Fields{
-					"error": err,
-					"id":    e.ID,
-				}).Error("log stdio")
-			}
-			h.s.processes[e.Pid].copier = l
-			ExecProcessTimer.UpdateSince(start)
-	*/
+	start := time.Now()
+	ci, ok := h.s.containers[e.ID]
+	if !ok {
+		return ErrContainerNotFound
+	}
+	process, err := ci.container.Exec(e.Pid, *e.ProcessSpec)
+	if err != nil {
+		return err
+	}
+	if err := h.s.monitorProcess(process); err != nil {
+		return err
+	}
+	ExecProcessTimer.UpdateSince(start)
+	e.StartResponse <- StartResponse{
+		Stdin:  process.Stdin(),
+		Stdout: process.Stdout(),
+		Stderr: process.Stderr(),
+	}
 	return nil
 }