Add events support in client

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

ctr/events.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"text/tabwriter"
+
+	"github.com/codegangsta/cli"
+	"github.com/docker/containerd/api/grpc/types"
+	netcontext "golang.org/x/net/context"
+)
+
+var EventsCommand = cli.Command{
+	Name:  "events",
+	Usage: "receive events from the containerd daemon",
+	Action: func(context *cli.Context) {
+		c := getClient()
+		events, err := c.Events(netcontext.Background(), &types.EventsRequest{})
+		if err != nil {
+			fatal(err.Error(), 1)
+		}
+		w := tabwriter.NewWriter(os.Stdout, 20, 1, 3, ' ', 0)
+		fmt.Fprint(w, "TYPE\tID\tPID\tSTATUS\n")
+		w.Flush()
+		for {
+			e, err := events.Recv()
+			if err != nil {
+				fatal(err.Error(), 1)
+			}
+			fmt.Fprintf(w, "%s\t%s\t%d\t%d\n", e.Type, e.Id, e.Pid, e.Status)
+			w.Flush()
+		}
+	},
+}

ctr/main.go

@@ -36,6 +36,7 @@ func main() {
 	app.Commands = []cli.Command{
 		ContainersCommand,
 		CheckpointCommand,
+		EventsCommand,
 	}
 	app.Before = func(context *cli.Context) error {
 		if context.GlobalBool("debug") {