Retrieve exit codes for containers via events

As we previously removed our exit code retrieval code to stop a
memory leak, we need a new way of doing this. Fortunately, events
is able to do the job for us.

Signed-off-by: Matthew Heon <matthew.heon@pm.me>

pkg/adapter/containers.go

@@ -22,6 +22,7 @@ import (
 	"github.com/containers/libpod/cmd/podman/shared/parse"
 	"github.com/containers/libpod/libpod"
 	"github.com/containers/libpod/libpod/define"
+	"github.com/containers/libpod/libpod/events"
 	"github.com/containers/libpod/libpod/image"
 	"github.com/containers/libpod/libpod/logs"
 	"github.com/containers/libpod/pkg/adapter/shortcuts"
@@ -417,8 +418,14 @@ func (r *LocalRuntime) Run(ctx context.Context, c *cliconfig.RunValues, exitCode
 
 	if ecode, err := ctr.Wait(); err != nil {
 		if errors.Cause(err) == define.ErrNoSuchCtr {
-			logrus.Errorf("Cannot get exit code: %v", err)
+			// Check events
-			exitCode = 127
+			event, err := r.Runtime.GetLastContainerEvent(ctr.ID(), events.Exited)
+			if err != nil {
+				logrus.Errorf("Cannot get exit code: %v", err)
+				exitCode = 127
+			} else {
+				exitCode = event.ContainerExitCode
+			}
 		}
 	} else {
 		exitCode = int(ecode)
@@ -622,8 +629,14 @@ func (r *LocalRuntime) Start(ctx context.Context, c *cliconfig.StartValues, sigP
 
 			if ecode, err := ctr.Wait(); err != nil {
 				if errors.Cause(err) == define.ErrNoSuchCtr {
-					logrus.Errorf("Cannot get exit code: %v", err)
+					// Check events
-					exitCode = 127
+					event, err := r.Runtime.GetLastContainerEvent(ctr.ID(), events.Exited)
+					if err != nil {
+						logrus.Errorf("Cannot get exit code: %v", err)
+						exitCode = 127
+					} else {
+						exitCode = event.ContainerExitCode
+					}
 				}
 			} else {
 				exitCode = int(ecode)