From: konsu <konsu@...>
Date: 2006-02-02T06:42:28+09:00
Subject: Re: check for and if not there, create direcory and file

hello,

a related question: how to make this atomic to avoid race conditions:

Dir.mkdir(".timeclock") unless File.exist?(".timeclock")

konstantin


"Logan Capaldo" <logancapaldo@gmail.com> wrote in message 
news:DFC45DE6-0CCF-40CE-A21B-8BCCE7674C71@gmail.com...
>
> On Jan 30, 2006, at 12:09 PM, charlie bowman wrote:
>
>> irb(main):002:0> Dir.mkdir(".timeclock")
>> won't the above faile once the directory is created.  I need to run a
>> check each time the application is ran.
>
> Yes, that's why you wrap it in an if (or unless) statement.
>
> unless File.exist?(".timeclock")
>    Dir.mkdir(".timeclock")
> end
> # Optionally make sure .timeclock is  a directory
> unless File.directory?(".timeclock")
>    puts ".timeclock is a not a directory."
>    exit( 1 )
> end
> # do whatever.
>
>
>