require("lfs") function os.exists(path)     return CCFileUtils:sharedFileUtils():isFileExist(path) end function os.mkdir(path)     if not os.exists(path) then         return lfs.mkdir(path)     end     return true end function os.rmdir(path)     print("os.rmdir:", path)     if os.exists(path) then         local function _rmdir(path)             local iter, dir_obj = lfs.dir(path)             while true do                 local dir = iter(dir_obj)                 if dir == nil then break end                 if dir ~= "." and dir ~= ".." then                     local curDir = path..dir                     local mode = lfs.attributes(curDir, "mode")                     if mode == "directory" then                         _rmdir(curDir.."/")                     elseif mode == "file" then                         os.remove(curDir)                     end                 end             end             local succ, des = os.remove(path)             if des then print(des) end             return succ         end         _rmdir(path)     end     return true end