#!/usr/bin/perl -w
use strict;

use constant PID     => 0;
use constant LOGIN   => 1;
use constant MACHINE => 2;
use constant WEEKDAY => 3;
use constant MONTH   => 4;
use constant DAY     => 5;
use constant TIME    => 6;
use constant YEAR    => 7;

use constant INFOFMT => "%s logged in on machine: %s (login: %s %s - %s)\n";
use constant INFOFIELDS => (LOGIN, MACHINE, MONTH, DAY, TIME);

my @info = grep /:/, do {
    open my $pipe, "smbstatus -b|"
        or die "Couldn't spawn 'smbstatus': $!\n";
    <$pipe>;
};

printf INFOFMT, (split /\s+/, $_, 8)[INFOFIELDS] for @info;
print "\ntotal users: " . @info . "\n";