{"one-file-system", 'x', POPT_ARG_NONE, &one_file_system, 0, 0, 0 },
{"existing", 0, POPT_ARG_NONE, &only_existing, 0, 0, 0 },
{"ignore-existing", 0, POPT_ARG_NONE, &opt_ignore_existing, 0, 0, 0 },
{"one-file-system", 'x', POPT_ARG_NONE, &one_file_system, 0, 0, 0 },
{"existing", 0, POPT_ARG_NONE, &only_existing, 0, 0, 0 },
{"ignore-existing", 0, POPT_ARG_NONE, &opt_ignore_existing, 0, 0, 0 },