Perl STDOUT/STDERR: ostream vs. iwpt_compile.ipl

System

I wonder if there should be a Perl forum.

If I have a presentation template that invokes another presentation template to generate another file, I would like to know whether the second presentation template generated anything to STDOUT/STDERR which I would normally detect as error or warning messages. I can do this with iwpt_compile.ipl using backticks. Is this also possible using the ostream functions?

In fact I would like to know whether the "parent" presentation template is generating anything to STDOUT/STDERR. I imagine this can be done with "SELECT" but I can't figure it out from the perldocs. Any pointers?

If I do invoke iwpt_compile directly, for performance I would prefer to use "do" instead if backticks. Is there a way do I trap STDOUT/STDERR with "do"?

TIA,

-John