connect SIGINT to custom interrupt handler

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From	Christoph Scheingraber <chris@spam.org>
Newsgroups	comp.lang.python
Subject	connect SIGINT to custom interrupt handler
Date	Sun, 15 May 2011 09:44:04 +0000 (UTC)
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Hi,

I am trying to connect SIGINT (^c) to a custom interrupt handler like
this (no threading, just straightforward): 



if __name__ == "__main__":
quit = False
def interrupt_handler(signal, frame):
    global quit
    if not quit:
        print "blabla, i'll finish my task and quit kind of message"
        print "Press ^C again to interrupt immediately."
    else:
        sys.exit(2)
    quit = True
signal.signal(signal.SIGINT, interrupt_handler)
# main will use the quit flag to determine if it should quit before next
# task
status = main()


This worked fine in some rare lucky cases, but most of the times, the
module I am using (my university's seismology project) catches the SIGINT
and quits:

select.error: (4, 'Interrupted system call')

How can I prevent the imported module's function from catching the
interrupt signal?


Thanks to anyone that takes the time to help me...

Chris

-- 
Chris Scheingraber - www.scheingraber.net

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Thread

connect SIGINT to custom interrupt handler Christoph Scheingraber <chris@spam.org> - 2011-05-15 09:44 +0000
  Re: connect SIGINT to custom interrupt handler Christoph Scheingraber <chris@spam.org> - 2011-05-15 14:32 +0000
    Re: connect SIGINT to custom interrupt handler Chris Angelico <rosuav@gmail.com> - 2011-05-16 01:30 +1000
    Re: connect SIGINT to custom interrupt handler Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-05-15 17:43 +0200
      Re: connect SIGINT to custom interrupt handler Christoph Scheingraber <spam@scheingraber.net> - 2011-05-15 17:05 +0000
        Re: connect SIGINT to custom interrupt handler Nobody <nobody@nowhere.com> - 2011-05-16 03:28 +0100
        Re: connect SIGINT to custom interrupt handler Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2011-05-20 09:38 +0200
    Re: connect SIGINT to custom interrupt handler Nobody <nobody@nowhere.com> - 2011-05-16 03:53 +0100
  Re: connect SIGINT to custom interrupt handler Nobody <nobody@nowhere.com> - 2011-05-15 14:08 +0100

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