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Date: Wed, 22 Feb 2006 09:04:48 -0500
From: Chuck Swiger <cswiger@mac.com>
Organization: The Courts of Chaos
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To: Robin Becker <robin@reportlab.com>
References: <43FC380E.9020808@chamonix.reportlab.co.uk>
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Cc: freebsd-questions@freebsd.org
Subject: Re: denyhosts
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Robin Becker wrote:
> I'm trying out the denyhosts port; it starts up and performs as expected,
> but it won't recognize a running instance as this python if test fails.
> Is there a more freebsd way for python to find out if a given process is
> running?
> 
>     if os.access(os.path.join("/proc", str(pid)), os.F_OK):
>         return pid
>     else:
>         return STATE_LOCK_EXISTS
> 

If you know the pid, see whether you can deliver a continue signal to it:

    try:
        os.kill(pid, signal.SIGCONT)
        return pid
    except OSError:
        return STATE_LOCK_EXISTS

-- 
-Chuck

PS: "STALE_LOCK_EXISTS", maybe...?  :-)