Consider using Getopt::Long instead of hand-rolling your option parsing. Getopt::Long can also set up your callbacks but will handle many more features:

use Getopt::Long qw(:config pass_through);
my $run;
GetOptions(
    'x|run-using-system'   => sub { $run = \&system },
    'X|run-using-mysystem' => sub { $run = \&mysystem },
);
$run->(@ARGV);

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In reply to Re^3: how to assign 'system' to a value, and eval it. by Corion
in thread SOLVED:how to assign 'system' to a value, and eval it. by vincentaxhe

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