./prog.pl -o function(key => './path')


##</code><code>##


#!/usr/bin/perl
use strict;
use Getopt::Long;

my $option;
GetOptions('o=s' =>\$option);
eval($option);


sub function {

  my %arg = @_;

  ...
}


##</code><code>##

-bash: syntax error near unexpected token `('