isBridgeInterface :: String -> IO (Bool)
isBridgeInterface iface =  doesDirectoryExist (sysfsnet </> iface </> "bridge")
isBridgeInterface :: String -> IO (Bool)
isBridgeInterface iface =  doesDirectoryExist (sysfsnet </> iface </> "bridge")
isBridgeInterface iface =  doesDirectoryExist (sysfsnet </> iface </> "bridge")