Report error when arguments given to crio command

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

cmd/crio/main.go

@@ -409,6 +409,16 @@ func main() {
 			}()
 		}
 
+		args := c.Args()
+		if len(args) > 0 {
+			for _, command := range app.Commands {
+				if args[0] == command.Name {
+					break
+				}
+			}
+			return fmt.Errorf("command %q not supported", args[0])
+		}
+
 		config := c.App.Metadata["config"].(*server.Config)
 
 		if !config.SELinux {

test/command.bats

@@ -0,0 +1,12 @@
+#!/usr/bin/env bats
+
+load helpers
+
+@test "crio commands" {
+	run ${CRIO_BINARY} --config /dev/null config > /dev/null
+	echo "$output"
+	[ "$status" -eq 0 ]
+	run ${CRIO_BINARY} badoption > /dev/null
+	echo "$output"
+	[ "$status" -ne 0 ]
+}