#!/usr/bin/perl
use warnings;
use strict;

use User::pwent();

sub User::pwent::has {
    my $self = shift;
    return User::pwent::pw_has(@_);
}

print "Supported fields: ", scalar(User::pwent::has), "\n";

while (my $user = User::pwent::getpwent) {
    print 'Name    : ', $user->name, "\n";
    print 'Password: ', $user->passwd, "\n";
    print 'User ID : ', $user->uid, "\n";
    print 'Group ID: ', $user->gid, "\n";

    print 'Expire  : ', $user->expire, "\n" if $user->has('expire');
}  