+# Keep @opt_captive ordering
+# to let the options be overridable by user (such as 'ro').
+my @opt_captive=();
+my @opt_lufs=();
+my $opt_force;
+my $opt_rwmode="--blind";
+for (split /,/,$oo) {
+ $_="--$_" if $_ eq "ro" || $_ eq "rw";
+ $opt_rwmode=$_ if /^--(?:ro|rw|blind)$/;
+ $opt_force=1 if $_ eq "force";
+ push @opt_captive,$_ if /^--/;
+ push @opt_lufs,$_ if !/^--/;
+ }
+