Initial commit of libcontainer running docker

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)

pkg/libcontainer/nsinit/exec.go

@@ -227,7 +227,7 @@ func createCommand(container *libcontainer.Container, console, logFile string, p
 		"init"}, args...)...)
 
 	command.SysProcAttr = &syscall.SysProcAttr{
-		Cloneflags: uintptr(getNamespaceFlags(container.Namespaces)),
+		Cloneflags: uintptr(GetNamespaceFlags(container.Namespaces)),
 	}
 	command.Env = container.Env
 	return command

pkg/libcontainer/nsinit/ns_linux.go

@@ -28,7 +28,7 @@ var namespaceFileMap = map[libcontainer.Namespace]string{
 
 // getNamespaceFlags parses the container's Namespaces options to set the correct
 // flags on clone, unshare, and setns
-func getNamespaceFlags(namespaces libcontainer.Namespaces) (flag int) {
+func GetNamespaceFlags(namespaces libcontainer.Namespaces) (flag int) {
 	for _, ns := range namespaces {
 		flag |= namespaceMap[ns]
 	}