oci: improve error message when the OCI runtime is not found

We were previously returning the not so nice error directly from
conmon.

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/libpod/runtime.go b/libpod/runtime.go
index 94dbf37dd..52f4523ba 100644
--- a/libpod/runtime.go
+++ b/libpod/runtime.go
@@ -526,6 +526,16 @@ func makeRuntime(runtime *Runtime) (err error) {
 	if runtime.config.OCIRuntime != "" && runtime.config.OCIRuntime[0] == '/' {
 		foundRuntime = true
 		runtime.ociRuntimePath = OCIRuntimePath{Name: filepath.Base(runtime.config.OCIRuntime), Paths: []string{runtime.config.OCIRuntime}}
+		stat, err := os.Stat(runtime.config.OCIRuntime)
+		if err != nil {
+			if os.IsNotExist(err) {
+				return errors.Wrapf(err, "the specified OCI runtime %s does not exist", runtime.config.OCIRuntime)
+			}
+			return errors.Wrapf(err, "cannot stat the OCI runtime path %s", runtime.config.OCIRuntime)
+		}
+		if !stat.Mode().IsRegular() {
+			return fmt.Errorf("the specified OCI runtime %s is not a valid file", runtime.config.OCIRuntime)
+		}
 	} else {
 		// If not, look it up in the configuration.
 		paths := runtime.config.OCIRuntimes[runtime.config.OCIRuntime]