[zeromq-dev] czmq_new() and automatically installed signal handlers

[Pieter Hintjens]

Good question...

You're going to run into trouble if you want to exit any 0MQ loop, if
your application is catching the signals, unless you emulate something
like zctx_interrupted.

Assuming you have an answer for that, I'd suggest a simple change; if
zctx_interrupted is non-zero, don't install a signal handler.

I've made a patch that does this:
https://github.com/hintjens/czmq/commit/4491c46f2063442eafcaffcebaa31e54dc2ecdf4

Waiting for someone to merge to master along with other changes at
https://github.com/zeromq/czmq/pull/106.

-Pieter

On Mon, Dec 31, 2012 at 5:52 PM, Andy Ballingall TF
<ballingall at thefoundry.co.uk> wrote:
> If you call zctx_new(), then it automatically adds a signal handler which
> captures SIGINT and SIGTERM. (At least for *nix)
>
> I'm using czmq to add new functionality to existing applications, some of
> which already have signal handling in place, so that's going to be an issue.
>
> Has anyone discussed making the signal handling addition an option when
> calling zctx_new()?
>
> (This is the only discussion I could find and it isn't quite what I'm after)
>
> http://grokbase.com/t/zeromq/zeromq-dev/11cpsq2ccg/czmq-zctx-new-signal-handler-side-effect
>
> Andy
>
>
> --
> Andy Ballingall
> Senior Software Engineer
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