Merge pull request #1046 from dotcloud/1043-output_id_non_attach-fix

- Runtime: Make sure the ID is displayed usgin run -d

commands.go

@@ -1285,9 +1285,15 @@ func (cli *DockerCli) CmdRun(args ...string) error {
 		return err
 	}
 
+	var wait chan struct{}
+
 	if !config.AttachStdout && !config.AttachStderr {
 		// Make this asynchrone in order to let the client write to stdin before having to read the ID
-		go fmt.Fprintf(cli.out, "%s\n", runResult.ID)
+		wait = make(chan struct{})
+		go func() {
+			defer close(wait)
+			fmt.Fprintf(cli.out, "%s\n", runResult.ID)
+		}()
 	}
 
 	if config.AttachStdin || config.AttachStdout || config.AttachStderr {
@@ -1316,6 +1322,10 @@ func (cli *DockerCli) CmdRun(args ...string) error {
 			return err
 		}
 	}
+
+	if !config.AttachStdout && !config.AttachStderr {
+		<-wait
+	}
 	return nil
 }