diff --git a/libcontainer/cgroups/systemd/apply_systemd.go b/libcontainer/cgroups/systemd/apply_systemd.go
index ad2ab028..b6158095 100644
--- a/libcontainer/cgroups/systemd/apply_systemd.go
+++ b/libcontainer/cgroups/systemd/apply_systemd.go
@@ -150,16 +150,6 @@ func UseSystemd() bool {
 	return hasStartTransientUnit
 }
 
-func getIfaceForUnit(unitName string) string {
-	if strings.HasSuffix(unitName, ".scope") {
-		return "Scope"
-	}
-	if strings.HasSuffix(unitName, ".service") {
-		return "Service"
-	}
-	return "Unit"
-}
-
 func (m *Manager) Apply(pid int) error {
 	var (
 		c          = m.Cgroups
diff --git a/libcontainer/container_linux.go b/libcontainer/container_linux.go
index 29bf1b8c..7d39b788 100644
--- a/libcontainer/container_linux.go
+++ b/libcontainer/container_linux.go
@@ -407,16 +407,6 @@ func (c *linuxContainer) NotifyMemoryPressure(level PressureLevel) (<-chan struc
 	return notifyMemoryPressure(c.cgroupManager.GetPaths(), level)
 }
 
-// XXX debug support, remove when debugging done.
-func addArgsFromEnv(evar string, args *[]string) {
-	if e := os.Getenv(evar); e != "" {
-		for _, f := range strings.Fields(e) {
-			*args = append(*args, f)
-		}
-	}
-	fmt.Printf(">>> criu %v\n", *args)
-}
-
 // check Criu version greater than or equal to min_version
 func (c *linuxContainer) checkCriuVersion(min_version string) error {
 	var x, y, z, versionReq int
@@ -881,7 +871,7 @@ func (c *linuxContainer) criuSwrk(process *Process, req *criurpc.CriuReq, opts *
 			if err != nil {
 				return err
 			}
-			n, err = criuClient.Write(data)
+			_, err = criuClient.Write(data)
 			if err != nil {
 				return err
 			}
diff --git a/libcontainer/integration/exec_test.go b/libcontainer/integration/exec_test.go
index 22a9afbf..453843de 100644
--- a/libcontainer/integration/exec_test.go
+++ b/libcontainer/integration/exec_test.go
@@ -590,7 +590,7 @@ func testPids(t *testing.T, systemd bool) {
 	// Enforce a restrictive limit. 64 * /bin/true + 1 * shell should cause this
 	// to fail reliabily.
 	config.Cgroups.Resources.PidsLimit = 64
-	out, ret, err := runContainer(config, "", "/bin/sh", "-c", `
+	out, _, err := runContainer(config, "", "/bin/sh", "-c", `
 	/bin/true | /bin/true | /bin/true | /bin/true | /bin/true | /bin/true | bin/true | /bin/true |
 	/bin/true | /bin/true | /bin/true | /bin/true | /bin/true | /bin/true | bin/true | /bin/true |
 	/bin/true | /bin/true | /bin/true | /bin/true | /bin/true | /bin/true | bin/true | /bin/true |
diff --git a/libcontainer/label/label_selinux_test.go b/libcontainer/label/label_selinux_test.go
index c2a19f5b..aab89a8b 100644
--- a/libcontainer/label/label_selinux_test.go
+++ b/libcontainer/label/label_selinux_test.go
@@ -41,8 +41,7 @@ func TestInit(t *testing.T) {
 		}
 
 		testBadData := []string{"user", "role:user_r", "type:user_t", "level:s0:c1,c15"}
-		plabel, mlabel, err = InitLabels(testBadData)
-		if err == nil {
+		if _, _, err = InitLabels(testBadData); err == nil {
 			t.Log("InitLabels Bad Failed")
 			t.Fatal(err)
 		}
diff --git a/main_unsupported.go b/main_unsupported.go
index 3a83f4c1..32ce1ac9 100644
--- a/main_unsupported.go
+++ b/main_unsupported.go
@@ -11,7 +11,3 @@ var (
 	specCommand       cli.Command
 	killCommand       cli.Command
 )
-
-func runAction(*cli.Context) {
-	fatalf("Current OS is not supported yet")
-}
diff --git a/tty.go b/tty.go
index fd531068..80c65515 100644
--- a/tty.go
+++ b/tty.go
@@ -12,16 +12,6 @@ import (
 	"github.com/opencontainers/runc/libcontainer"
 )
 
-// newTty creates a new tty for use with the container.  If a tty is not to be
-// created for the process, pipes are created so that the TTY of the parent
-// process are not inherited by the container.
-func newTty(create bool, p *libcontainer.Process, rootuid int, console string) (*tty, error) {
-	if create {
-		return createTty(p, rootuid, console)
-	}
-	return createStdioPipes(p, rootuid)
-}
-
 // setup standard pipes so that the TTY of the calling runc process
 // is not inherited by the container.
 func createStdioPipes(p *libcontainer.Process, rootuid int) (*tty, error) {
diff --git a/utils.go b/utils.go
index 325038d6..e39bad52 100644
--- a/utils.go
+++ b/utils.go
@@ -139,15 +139,6 @@ var (
 
 var container libcontainer.Container
 
-func containerPreload(context *cli.Context) error {
-	c, err := getContainer(context)
-	if err != nil {
-		return err
-	}
-	container = c
-	return nil
-}
-
 // loadFactory returns the configured factory instance for execing containers.
 func loadFactory(context *cli.Context) (libcontainer.Factory, error) {
 	root := context.GlobalString("root")