How to verify normal termination of R scripts executed from Perl?

I have written a shebang R script and would like to execute it from a Perl script. I currently use system ($my_r_script_path, $r_script_arg1, $r_script_arg2, ...) and my question is how can I verify the R script terminates normally (no errors or warnings).

guess I should make my R script return some true value at the end, only if everything is OK, then catch this value in Perl, but I'm not sure how to do that.

Thanks!