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Date: Thu, 20 Dec 2007 16:29:43 -0500
From: "Frodak Baksik" <frodak17 AT gmail DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Ruby on Rails 2.0.2/Cygwin Bug
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On Dec 20, 2007 10:28 AM, Mike Boone  wrote:
> On Dec 19, 2007 11:59 PM, Igor Peshansky wrote:
> > Well, /dev/urandom certainly exists in Cygwin.  I'm not a Ruby expert, but
> > considering that adding a puts() before the file open seems to fix it, I'd
> > look somewhere in the Ruby code.  But you can try running the original
> > under strace to see what exactly Ruby is trying to do with /dev/urandom.
>
> I ran strace ruby /usr/bin/rails test_app > strace.txt, and it
> generated 54MB of text. It looks like the last 100 lines or so might
> be relevant, but I don't know how to decipher them. The "No such file
> or directory - /dev/urandom" occurs toward the bottom.
>
> http://boonedocks.net/code/rails-urandom-strace.txt
>
> I'd appreciate it if anyone is willing to have a look. I guess my next
> step might be to rerun the strace with the puts() statement in there
> and see what the difference is.
>
> Thanks,
> Mike.
> http://boonedocks.net/mike/
>
> --


Can you access /dev/urandom outside of ruby?  It might be a simpler
check to ensure that /dev/urandom is working.

Something like to check reading:
head -c 10 /dev/urandom > rnd.bin

and then to check writing:
cat rnd.bin > /dev/urandom
or
strace -o strace.txt sh -c 'cat rnd.bin > /dev/urandom'

It looked like from the strace that reading worked, but writing didn't.

Regards,
Frodak

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