Add new exit codes to rm & rmi for running containers & dependencies

This enables programs and scripts wrapping the podman command to handle
'podman rm' and 'podman rmi' failures caused by paused or running
containers or due to images having other child images or dependent
containers. These errors are common enough that it makes sense to have
a more machine readable way of detecting them than parsing the standard
error output.

Signed-off-by: Ondrej Zoder <ozoder@redhat.com>
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

4 files changed, 39 insertions, 8 deletions

diff --git a/cmd/podman/errors.go b/cmd/podman/errors.go
index 9731037f4..ae9e73e62 100644
--- a/cmd/podman/errors.go
+++ b/cmd/podman/errors.go
@@ -8,6 +8,8 @@ import (
 	"os/exec"
 	"syscall"
 
+	"github.com/containers/libpod/libpod/define"
+	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 )
 
@@ -24,3 +26,14 @@ func outputError(err error) {
 		fmt.Fprintln(os.Stderr, "Error:", err.Error())
 	}
 }
+
+func setExitCode(err error) int {
+	cause := errors.Cause(err)
+	switch cause {
+	case define.ErrNoSuchCtr:
+		return 1
+	case define.ErrCtrStateInvalid:
+		return 2
+	}
+	return exitCode
+}
diff --git a/cmd/podman/errors_remote.go b/cmd/podman/errors_remote.go
index 1e276be10..19df2d2d8 100644
--- a/cmd/podman/errors_remote.go
+++ b/cmd/podman/errors_remote.go
@@ -9,6 +9,7 @@ import (
 	"syscall"
 
 	"github.com/containers/libpod/cmd/podman/varlink"
+	"github.com/containers/libpod/libpod/define"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 )
@@ -43,3 +44,22 @@ func outputError(err error) {
 		fmt.Fprintln(os.Stderr, "Error:", ne.Error())
 	}
 }
+
+func setExitCode(err error) int {
+	cause := errors.Cause(err)
+	switch e := cause.(type) {
+	// For some reason golang wont let me list them with commas so listing them all.
+	case *iopodman.ContainerNotFound:
+		return 1
+	case *iopodman.InvalidState:
+		return 2
+	default:
+		switch e {
+		case define.ErrNoSuchCtr:
+			return 1
+		case define.ErrCtrStateInvalid:
+			return 2
+		}
+	}
+	return exitCode
+}
diff --git a/cmd/podman/rm.go b/cmd/podman/rm.go
index 958ca1c60..9e3ce4d0b 100644
--- a/cmd/podman/rm.go
+++ b/cmd/podman/rm.go
@@ -4,7 +4,6 @@ import (
 	"fmt"
 
 	"github.com/containers/libpod/cmd/podman/cliconfig"
-	"github.com/containers/libpod/libpod/define"
 	"github.com/containers/libpod/pkg/adapter"
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
@@ -65,18 +64,16 @@ func rmCmd(c *cliconfig.RmValues) error {
 
 	ok, failures, err := runtime.RemoveContainers(getContext(), c)
 	if err != nil {
-		if errors.Cause(err) == define.ErrNoSuchCtr {
-			if len(c.InputArgs) > 1 {
-				exitCode = 125
-			} else {
-				exitCode = 1
-			}
+		if len(c.InputArgs) < 2 {
+			exitCode = setExitCode(err)
 		}
 		return err
 	}
 
 	if len(failures) > 0 {
-		exitCode = 125
+		for _, err := range failures {
+			exitCode = setExitCode(err)
+		}
 	}
 
 	return printCmdResults(ok, failures)
diff --git a/cmd/podman/rmi.go b/cmd/podman/rmi.go
index 57e78c34a..3f621116e 100644
--- a/cmd/podman/rmi.go
+++ b/cmd/podman/rmi.go
@@ -74,6 +74,7 @@ func rmiCmd(c *cliconfig.RmiValues) error {
 				fmt.Printf("A container associated with containers/storage, i.e. via Buildah, CRI-O, etc., may be associated with this image: %-12.12s\n", img.ID())
 			}
 			if !adapter.IsImageNotFound(err) {
+				exitCode = 2
 				failureCnt++
 			}
 			if lastError != nil {