diff --git a/gfalse/false.go b/gfalse/false.go
new file mode 100644
index 0000000..043fe8a
--- /dev/null
+++ b/gfalse/false.go
@@ -0,0 +1,5 @@
+package gfalse
+
+func Run(args []string) int {
+	return 1
+}
\ No newline at end of file
diff --git a/gtrue/true.go b/gtrue/true.go
new file mode 100644
index 0000000..56a5308
--- /dev/null
+++ b/gtrue/true.go
@@ -0,0 +1,5 @@
+package gtrue
+
+func Run(args []string) int {
+	return 0
+}
\ No newline at end of file
diff --git a/main.go b/main.go
index fab233d..c380f3e 100644
--- a/main.go
+++ b/main.go
@@ -7,6 +7,8 @@ import(
 	"github.com/jienfak/goblin/cat"
 	"github.com/jienfak/goblin/echo"
 	"github.com/jienfak/goblin/mkdir"
+	"github.com/jienfak/goblin/gtrue"
+	"github.com/jienfak/goblin/gfalse"
 )
 
 func main() {
@@ -20,6 +22,8 @@ func main() {
 		"cat": cat.Run,
 		"mkdir" : mkdir.Run,
 		"echo" : echo.Run,
+		"true" : gtrue.Run,
+		"false" : gfalse.Run,
 	}
 
 	if binBase := path.Base(os.Args[0]) ; binBase != "goblin" {
@@ -42,4 +46,4 @@ func main() {
 	}
 	status := utilsMap[utilName].(func([]string) int )(args)
 	os.Exit(status)
-}
\ No newline at end of file
+}