use INIT, not BEGIN

Yes, it is INIT not begin. I put in a typo. Sorry!

I suspect an XY problem here. What are you trying to to with that which you are ostensibly trying to do?

Oh, no no! It's not. I'm just trying to learn how a debugger is built :) I downloaded the source for strace and gdb but it's just too large to understand..

Mostly, it's a exercise in perl, C and Linux I've given myself to write a program that can list out all system calls a perl script is making while executing that program .