Enable cleanup processes for detached exec

The cleanup command creation logic is made public as part of this
and wired such that we can call it both within SpecGen (to make
container exit commands) and from the ABI detached exec handler.
Exit commands are presently only used for detached exec, but
theoretically could be turned on for all exec sessions if we
wanted (I'm declining to do this because of potential overhead).

I also forgot to copy the exit command from the exec config into
the ExecOptions struct used by the OCI runtime, so it was not
being added.

There are also two significant bugfixes for exec in here. One is
for updating the status of running exec sessions - this was
always failing as I had coded it to remove the exit file *before*
reading it, instead of after (oops). The second was that removing
a running exec session would always fail because I inverted the
check to see if it was running.

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

1 files changed, 10 insertions, 0 deletions

diff --git a/cmd/podman/containers/cleanup.go b/cmd/podman/containers/cleanup.go
index 257efb971..619031208 100644
--- a/cmd/podman/containers/cleanup.go
+++ b/cmd/podman/containers/cleanup.go
@@ -8,6 +8,7 @@ import (
 	"github.com/containers/libpod/cmd/podman/utils"
 	"github.com/containers/libpod/pkg/domain/entities"
 	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 )
 
@@ -68,6 +69,12 @@ func cleanup(cmd *cobra.Command, args []string) error {
 
 	responses, err := registry.ContainerEngine().ContainerCleanup(registry.GetContext(), args, cleanupOptions)
 	if err != nil {
+		// `podman container cleanup` is almost always run in the
+		// background. Our only way of relaying information to the user
+		// is via syslog.
+		// As such, we need to logrus.Errorf our errors to ensure they
+		// are properly printed if --syslog is set.
+		logrus.Errorf("Error running container cleanup: %v", err)
 		return err
 	}
 	for _, r := range responses {
@@ -76,12 +83,15 @@ func cleanup(cmd *cobra.Command, args []string) error {
 			continue
 		}
 		if r.RmErr != nil {
+			logrus.Errorf("Error removing container: %v", r.RmErr)
 			errs = append(errs, r.RmErr)
 		}
 		if r.RmiErr != nil {
+			logrus.Errorf("Error removing image: %v", r.RmiErr)
 			errs = append(errs, r.RmiErr)
 		}
 		if r.CleanErr != nil {
+			logrus.Errorf("Error cleaning up container: %v", r.CleanErr)
 			errs = append(errs, r.CleanErr)
 		}
 	}