Re: How do I test for the existens of a file

["Jerome Vuarand" <jerome.vuarand@...>]

2008/10/24 Robert Raschke <rtrlists@googlemail.com>:
> On Fri, Oct 24, 2008 at 2:20 PM, TheLonelyStar <nabble2@lonely-star.org> wrote:
>> I want to test if a specific file exist, and do something if yes. Like
>>
>> if <file exist> then
>>  <do something>
>> else
>>  <do something else>
>> end
>>
>> How do I do that?
>
> I use
>
> function file_exists(file_name)
>        local file = io.open(file_name)
>        if file then
>                file:close()
>        end
>        return file ~= nil
> end

If you have access to LuaFileSystem [1] you can also use:

function file_exist(file_name)
       return lfs.attributes(file_name, 'mode')~=nil
end

This may or may not be faster depending on your setup.

[1] http://www.keplerproject.org/luafilesystem/