func: bool is_valid_option_list(const char *param)
  
  {
  
      size_t buflen = strlen(param) + 1;
  
      char *buf = g_malloc(buflen);
  
      const char *p = param;
  
      bool result = true;
  
  
  
      while (*p) {
  
          p = get_opt_value(buf, buflen, p);
  
          if (*p && !*++p) {
  
              result = false;
  
              goto out;
  
          }
  
  
  
          if (!*buf || *buf == ',') {
  
              result = false;
  
              goto out;
  
          }
  
      }
  
  
  
  out:
  
      free(buf);
  
      return result;
  
  }
  