Would something like this do? 
use subs 'system','chdir','glob';

glob; chdir; system;

sub system {print "system\n"}
sub chdir { print "chdir\n" }
sub glob { print "glob\n" }

[download]

__OUTPUT__ 

glob
chdir
system

In reply to Re: overwrite builtin functions ( system, chdir ) by ktross
in thread overwrite builtin functions ( system, chdir ) by borisz

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