signal module?

[Daniel Nielsen]

On 27/03-03 10.47, Tim Evans wrote:
> Daniel Nielsen <djn at daimi.au.dk> writes:
> 
> > Hi. 
> > 
> > I'm currently working on some code that uses the signal module... But
> > I doesnt seem to work proberly.
> > 
> > I'm using threads, so I'd like ctrl-c to actually terminate the
> > program. If my memory serves me, ctrl-c is SIGINT, so in my code, in
> > the main thread, I write:
> > 
> > signal.signal(signal.SIGINT, gp.handler);
> > 
> > where gp is a module and handler looks like:
> > 
> > def handler(signum, frame):
> >     print "Handling signal: " + signum;
> >     sys.exit(2);
> > 
> > But ctrl-c doesnt do anything!
> > 
> > If I write:
> > signal.signal(signal.SIGINT, signal.SIG_DFL);
> > instead, ctrl-c actually terminates the program...
> > Have I misunderstood something?
> > 
> > /Daniel
> 
> This works fine when for me as long as I press ctrl-c when python is
> running and not waiting for input at the '>>>' prompt.  Try typing
> this:
> 
> 
> >>> while True:
> ..     pass
> ..
> <press ctrl-c now>
> Handling signal: 2
> 
> 
> I'm not sure why it works this way, maybe python's use of readline
> changes something.
> 
> Note that your handler function will not actually work as written.
> Replace this line:
>     print "Handling signal: " + signum
> with this:
>     print "Handling signal: ", signum
> 


I'm not using the python cmd line, instead i run it from a script.
I tried NOT starting seperate threads, and then it works as
expected. No problems.

But as soon as I reenable the threads, the handler doesn't get the
signal... I cannot understand why! Anyone care to elaborate?


/Daniel


-- 
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by circumstances to meet.
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