/**
 *
 * \section COPYRIGHT
 *
 * Copyright 2013-2015 Software Radio Systems Limited
 *
 * \section LICENSE
 *
 * This file is part of the srsUE library.
 *
 * srsUE is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * srsUE is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * A copy of the GNU Affero General Public License can be found in
 * the LICENSE file in the top-level directory of this distribution
 * and at http://www.gnu.org/licenses/.
 *
 */

#ifndef SRSLTE_CONFIG_FILE_H
#define SRSLTE_CONFIG_FILE_H

#include <fstream>
#include <pwd.h>
#include "common.h"

bool config_exists(std::string &filename, std::string default_name)
{
  std::ifstream conf(filename.c_str(), std::ios::in);
  if(conf.fail()) {
    const char *config_dir = NULL;
    char full_path[256];
    ZERO_OBJECT(full_path);
    if ((config_dir = getenv("SRSLTE_CONFIG_DIR")) == NULL) {
      fprintf(stderr, "No environment variable SRSLTE_CONFIG_DIR defined.\n"
                      "Please run \"export SRSLTE_CONFIG_DIR=/usr/etc/srs\" to define it.\n\n");
      return false;
    }
    snprintf(full_path, sizeof(full_path), "%s/%s", config_dir, default_name.c_str());
    filename = std::string(full_path);

    // try to open again
    conf.open(filename.c_str());
    if (conf.fail()) {
      return false;
    }
  }
  return true;
}

#endif // SRSLTE_CONFIG_FILE_H