From: Glen Holcomb <damnbigman@...>
Date: 2008-12-05T23:31:59+09:00
Subject: Re: Force a program to stop if runtime exceeds given duration

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On Fri, Dec 5, 2008 at 7:24 AM, Glen Holcomb <damnbigman@gmail.com> wrote:

> On Fri, Dec 5, 2008 at 7:25 AM, Glen Holcomb <damnbigman@gmail.com> wrote:
>
> > On Fri, Dec 5, 2008 at 7:08 AM, Glen Holcomb <damnbigman@gmail.com>
> wrote:
> >
> >> On Fri, Dec 5, 2008 at 6:59 AM, Aldric Giacomoni <"aldric[remove]"@
> >> trevoke.net> wrote:
> >>
> >> > Everybody automatically assumes that rubyists are using Linux - sadly,
> >> in
> >> > the medical field Linux is not an option unless you're working with
> the
> >> > modality itself. Medical software is almost all Windows-based.. So,
> >> Windows
> >> > is where I am for this issue and Windows is where I remain :(
> >> > If it were for an outside-Ruby solution, I can think of tons of
> options.
> >> I
> >> > just want a program which works and does everything all by itself..
> >> Because
> >> > if I have to deploy this to 400 machines, I don't wanna have to do any
> >> more
> >> > setup work than absolutely required.
> >> >
> >> >
> >> > Ron Fox wrote:
> >> >
> >> >> See http://www.ruby-doc.org/core-1.9/classes/Process.html#M003012
> >> >>
> >> >> It and sleep have all the tools you need to do this. The idea is that
> >> you
> >> >> have a master process that forks the child process which runs the
> >> script you
> >> >> want to time.  The master process then loops. The loop
> >> >> sleeps a bit then calls waitpid with the WNOHANG flag to see if the
> >> child
> >> >> has exited.  Count the sleep time, or use Time to figure out how long
> >> you've
> >> >> been waiting.. Once you've waited long enough, use kill
> >> >> to kill the child process.  If the child has exited.. the master
> >> process
> >> >> exits.
> >> >>
> >> >> The length of your sleep in the loop of the master process determines
> >> >> - The precision with which you measure the timeout.
> >> >> - The latency with which the master process responds to normal child
> >> exit.
> >> >>
> >> >> Ron.
> >> >>
> >> >> Aldric Giacomoni wrote:
> >> >>
> >> >>> Any idea how to do that?
> >> >>> Say, I don't want a program to run longer than 5 hours.. How would
> >> that
> >> >>> be implemented?
> >> >>>
> >> >>> --Aldric
> >> >>>
> >> >>
> >> >>
> >> >>
> >> >
> >> I'm in the same boat here at work.  Fork won't work in Windows so that
> >> option is out.  However if the thread or timeout suggestions don't work
> >> for
> >> you it might be possible to adjust Robert's suggestion to run as a
> Windows
> >> Task.  I don't know if you can put a time limit on a task though (don't
> >> use
> >> them very often).
> >>
> >> --
> >> "Hey brother Christian with your high and mighty errand, Your actions
> >> speak
> >> so loud, I can't hear a word you're saying."
> >>
> >> -Greg Graffin (Bad Religion)
> >>
> >
> > Another option (to expand on my second suggestion) would be to compile
> the
> > potentially long running script into an exe using rubyscript2exe and then
> > launch it from another script system("start script.exe") then after five
> > hours wake up and check the windows process list for script.exe and if it
> is
> > running kill it:
> >
> > wmi =
> >
> WIN32OLE.connect("winmgmts:{impersonationLevel=impersonate,(Shutdown)}\\\\#{name}\\root\\cimv2")
> > proc_list = wmi.ExecQuery("select * from win32_process")
> > proc_list.each do |process|
> >   if process.Name == "script.exe"
> >     process.Terminate(8)
> >   end
> > end
> >
> > http://msdn.microsoft.com/en-us/library/aa394372(VS.85).aspx<http://msdn.microsoft.com/en-us/library/aa394372%28VS.85%29.aspx>
> <http://msdn.microsoft.com/en-us/library/aa394372%28VS.85%29.aspx>
> >
> > You would of course need to require 'win32ole' for this to work.
> >
> >
> > --
> > "Hey brother Christian with your high and mighty errand, Your actions
> speak
> > so loud, I can't hear a word you're saying."
> >
> > -Greg Graffin (Bad Religion)
> >
>
> Sorry copied that from another program of mine without looking at it too
> closely.  You don't need to impersonate on the WIN32OLE.connect and #{name}
> should be the machine hostname so something like this should work:
>
> require 'socket'
> require 'win32ole'
>
> wmi = WIN32OLE.connect("winmgmts:\\\\#{Socket.hostname}\\root\\cimv2")
> proc_list = wmi.ExecQuery("select * from win32_process")
> proc_list.each do |process|
>  if process.Name == "script.exe"
>    process.Terminate(8)
>  end
> end
>
> --
> "Hey brother Christian with your high and mighty errand, Your actions speak
> so loud, I can't hear a word you're saying."
>
> -Greg Graffin (Bad Religion)
>

Yet another typo, I really shouldn't do this until I'm awake.

#{Socket.hostname} should actually be #{Socket.gethostname}

-- 
"Hey brother Christian with your high and mighty errand, Your actions speak
so loud, I can't hear a word you're saying."

-Greg Graffin (Bad Religion)

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