How do I check if a PERL code is safe? If I dont know perl language
Perl looks very simple and small. 

A friend wants me to run a simple perl code and I dont understand if that perl script will do more than what is supposed to do. 

Could perl scripts work like backdoor? Probably yes then.. 

How would a non programmer look if that perl script is not capturing display information, recording keystrokes and other things? 

Thank you 
How do I check if a PERL code is safe? If I dont know perl language
===

Perl looks very simple and small. 

A friend wants me to run a simple perl code and I dont understand if that perl script will do more than what is supposed to do. 

Could perl scripts work like backdoor? Probably yes then.. 

How would a non programmer look if that perl script is not capturing display information, recording keystrokes and other things? 

Thank you 