[IPython-dev] Ctrl-C quitting ipython

Hans Meine hans_meine@gmx....
Wed Nov 3 11:08:03 CDT 2010


Op den Middeweken 03 November 2010 Klock 16:51:04 hett Gael Varoquaux 
schreven:
> On Wed, Nov 03, 2010 at 04:49:45PM +0100, Hans Meine wrote:
> > Op den Middeweken 03 November 2010 Klock 15:09:50 hett Hans Meine
> > schreven:
> > > The result: "Program exited with code 01." - looks like sys.exit(1) (or
> > > the equivalent in C in some library) being called.  Probably some
> > > extension installed a signal handler (we suspect openmesh).
> > 
> > Problem solved, it was "from enthought.tvtk.api import tvtk" which
> > installed a SIGINT handler, and updating the ETS helped.
> 
> Ugly! How did updating ETS help? Is the SIGINT handler removed in the new
> ETS?

I don't know the details, but that's my impression, yes.  Such are the risks 
of running software from development repositories, I guess... ;-)

Unfortunately, it's probably not possible to detect this within ipython, 
right?  After all, the SIGINT handler might also have played nice.  It would 
be interesting to know 

- whether we can detect and report signal handlers being installed
- whether that would be annoying (don't know how noisy the result would be)
- whether we can catch exit() being called and at least report "IPython 
noticed some extension/C-code called exit()", which would have at least 
reduced the debugging time for us

Greetings,
  Hans


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