sub mput {
    ...
    my ($sftp, $local, $remotedir, %opts) = @_;
    ...
    my $ignore_links = delete $opts{ignore_links};

    my %glob_opts = (map { $_ => delete $opts{$_} }
		     qw(on_error follow_links ignore_case
                        wanted no_wanted strict_leading_dot));
    ...
    my %put_opts = (map { $_ => delete $opts{$_} }
		    qw(umask perm copy_perm copy_time block_size queue_size
                       overwrite conversion resume numbered late_set_perm
                       atomic best_effort sparse));

    %opts and _croak_bad_options(keys %opts);
    ...