for(; optind < argc; ++optind)
{
    const char *argv_copy = strdup(argv[optind]);
    if (argv_copy[0] == '+' && argv_copy[1] == 'O')
    {
        /* A deactivation parameter have been just found ! */
        ++optind;
        if (handle_shopt_options(shell_options,
                                 argv[optind],
                                 DISABLE) == EXIT_FAILURE)
        {
            usage(argv[optind]);
            free_shell_options(shell_options);
            shell_options = NULL;
        }
    }
}