Install signal handler instead of IGN (#44)

[mschubert]

Pull request for https://github.com/ropensci/rzmq/issues/44.

work in progress

[codecov-io]

Codecov Report

Merging #45 into master will increase coverage by 0.37%. The diff coverage is 71.42%.

@@            Coverage Diff            @@
##           master     #45      +/-   ##
=========================================
+ Coverage   33.82%   34.2%   +0.37%     
=========================================
  Files           4       4              
  Lines         680     690      +10     
=========================================
+ Hits          230     236       +6     
- Misses        450     454       +4

Impacted Files	Coverage Δ
src/interface.cpp	29.4% <71.42%> (+0.6%)	:arrow_up:

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[armstrtw]

thanks.

[mschubert]

Thank you, but I'm afraid the merge as a bit too quick

Please do not put this on CRAN yet, it needs more testing (and likely a couple of adjustments)

[jeroen]

Please be careful not to override R's internal signal handing. R has a built-in methods for catching SIGINT which is exposed via the R_CheckUserInterrupt() api. I think you should only use custom signal handlers if you are resetting them at the end of the function.

[mschubert]

Yes, that part is still missing - hence the work in progress

[jeroen]

OK I'm going to revert it in master :)

[jeroen]

I have removed the commit from the master branch. Can you send a new PR once it is done? Maybe keep the WIP in your private repo :)

[mschubert]

Ha, I thought that was a good way to have you two have a look at the current state, but next time I'll put a

DO NOT MERGE YET

in bold and blinking letters ;)

WIP is here: https://github.com/mschubert/rzmq/tree/signal