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Re: Unable to start Tor in Cygwin

On Mon, Aug 21, 2006 at 08:32:23PM +0800, Pei Hanru wrote:
> Hi,
> I complied Tor in Cygwin successfully, but when trying to start Tor, I
> got the following messages and Tor exits.
> Aug 21 20:23:55.890 [notice] Tor v0.1.2.0-alpha-cvs. This is
> experimental software. Do not rely on it for strong anonymity.
> Aug 21 20:23:55.905 [notice] Initialized libevent version 1.1b using
> method poll. Good.
> Aug 21 20:23:55.905 [warn] set_max_file_descriptors(): Could not set
> maximum number of file descriptors: Too many open files
> Aug 21 20:23:55.905 [warn] Failed to parse/validate config: Problem with
> ConnLimit value. See logs for details.
> Aug 21 20:23:55.905 [err] tor_init(): Reading config failed--see
> warnings above.
> I also tried to start Tor with the option ConnLimit, such as "tor
> ConnLimit 100", but still failed...
> Dos anybody here know where the problem is? Any hint? Thanks in advance.

I'm afraid I don't have a cygwin setup handy, so I can only explain
what Tor is doing here.  Tor is calling Cygwin's setrlimit function to
change the maximum number of file descriptors (RLIMIT_NOFILE).  It
looks like this call is failing with EMFILES.  This shouldn't happen,
since we don't raise the value any higher than the hard limit.  I'd
suspect a Cygwin limitation.

Googling shows that this has been a problem with _at least some_
versions of Cygwin:

Does this problem occur with the latest cygwin builds?

Nick Mathewson

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