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if ($sender && exists($mailer_args{via})) {
    if ($mailer_args{via} eq 'sendmail') {
	$mailer_args{sendmail_options} = []
	    unless exists $mailer_args{sendmail_options};
	push @{$mailer_args{sendmail_options}}, '-f', $sender;
    } elsif ($mailer_args{via} eq 'smtp') {
	$mailer_args{from} = $sender;
    }
}

my ($name,undef,undef,undef,undef,$comment,$gecos) = getpwuid($<);
$fullname = $gecos || $comment || $name unless defined $fullname;
$sender = $name . '@' . ($localdomain || hostname()) unless defined $sender;

if ($recipient) {
    $mailer_args{to} = $recipient;
}

$archive_url = shift;
abend(EX_USAGE, "not enough arguments") unless defined $archive_url;
abend(EX_USAGE, "too many arguments") unless $#ARGV == -1;