From: Joel VanderWerf <vjoel@...>
Date: 2003-01-14T05:31:13+09:00
Subject: Re: is flock broken on solaris?

Joel VanderWerf wrote:
>             File.read($path)

I should have pointed out that the File.read call (within the lock 
context) is necessary to the problem. I wonder if that gives up the 
lock? Because doing the following immediately after the read seems to 
fix the problem:

             f.flock(File::LOCK_EX)

So this suggests that file locks are nestable on linux but not on 
solaris. The man pages say that solaris flock is implemented in terms of 
fcntl, so maybe that's where the semantic difference comes from...

I wonder if there is a way ruby can insulate us from this difference?