dedicated.cpp

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/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD 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 General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "stdafx.h"
#include "fileio_func.h"
#include "debug.h"
 
std::string _log_file; 
std::optional<FileHandle> _log_fd; 
 
#if defined(UNIX)
 
#include <unistd.h>
 
#include "safeguards.h"
 
void DedicatedFork()
{
  /* Fork the program */
  pid_t pid = fork();
  switch (pid) {
    case -1:
      perror("Unable to fork");
      exit(1);
 
    case 0: { // We're the child
      /* Open the log-file to log all stuff too */
      _log_fd = FileHandle::Open(_log_file, "a");
      if (!_log_fd.has_value()) {
        perror("Unable to open logfile");
        exit(1);
      }
      /* Redirect stdout and stderr to log-file */
      if (dup2(fileno(*_log_fd), fileno(stdout)) == -1) {
        perror("Rerouting stdout");
        exit(1);
      }
      if (dup2(fileno(*_log_fd), fileno(stderr)) == -1) {
        perror("Rerouting stderr");
        exit(1);
      }
      break;
    }
 
    default:
      /* We're the parent */
      Debug(net, 0, "Loading dedicated server...");
      Debug(net, 0, "  - Forked to background with pid {}", pid);
      exit(0);
  }
}
#endif