From: Joel VanderWerf <vjoel@...>
Date: 2005-06-25T05:08:46+09:00
Subject: Re: FSDB, Apache, FastCGI - ERROR: FSDB::Database::DirIsImmutableError

Jonas Hartmann wrote:
> The test scripts, that are supplied by FSDB throw some errors as well; 
> see: http://rafb.net/paste/results/9gxy2a55.html
> 
> again: how do i start debugging, whats the way to go?
> 
> Jonas

Aside from the file ownership issue, the EISDIR is a real problem. 
You're running on OS X, I see? A few months ago, a Tristan O'Tierney was 
trying to run FSDB on OSX and ran into the same thing: flock() on a dir 
raises EISDIR.

Here's a suggestion that seemed to solve the problem for him:

> I've never had a chance to try fsdb on darwin, but I suspect that
> there are the usual minor variations in what the file system allows
> and what errors it reports. There's already some code in fsdb to
> account for the difference between WinME, Win2K, Linux, and Solaris.
> Locking is especially hard to do portably.
> 
> One thing you might try first is to use fcntl locks instead of flock.
> It's easy to switch--just create your database like this:
> 
> require 'fsdb/fcntl_lock' # this will be unnnecessary in future FSDB
> versions
> 
> db = FSDB::Database.new dir, :lock_type => :fcntl_lock
> 
> Whether that works or not, it's probably a good idea for me to patch
> the locking code to avoid trying to lock dirs, if that operation
> fails on darwin. Or it could just always use fcntl, if that works.
> 
> The odd thing is that I don't see anything on the man pages
> (http://www.manpages.info/macosx/flock.2.html) saying that flock
> fails on dirs.

But I'm not sure that completely solved the problem, and I haven't been 
able to get a darwin machine to test on. Would you mind trying the above 
suggestion?

One thing to watch out for: the fcntl-lock is a C extension (code thanks 
to Ara!), which is why it's not the default. But I dunno if it builds on 
darwin. So, if the suggestion above doesn't work, let me know what 
output you get for the config/setup process.

Thanks!