I would like to get the MAC address from my sniffer - compare it with my pre-defined mac address and if the result don't match, I want to send out an email with the MAC address found. I want to run this perl code in background (with &). I'm not sure how to go about doing this. Here is my code: 

#!/bin/perl

use strict;
use warnings;
use sigtrap;
use diagnostics;

my $mac="ff:ff:ff:ff:ff:ff";
my $command = system (`tshark -i eth0 -n port 68 -R 'bootp.type == 2' 
+-o column.format:'"Source MAC","%hs"'`);
if ($command ne $mac) {

        system ('echo "match" | /usr/bin/mail -s "mac_found" user@foo.
+com');
}

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In reply to get mac addr, compare & send out email by chris_henderson

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