OpenTTD Source: src/dedicated.cpp Source File

OpenTTD Source 15.0-beta1

dedicated.cpp
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1/*
2 * This file is part of OpenTTD.
3 * 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.
4 * 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.
5 * 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/>.
6 */
7
10#include "stdafx.h"
11#include "fileio_func.h"
12#include "debug.h"
13
14std::string _log_file;
15std::optional<FileHandle> _log_fd;
16
17#if defined(UNIX)
18
19#include <unistd.h>
20
21#include "safeguards.h"
22
23void DedicatedFork()
24{
25 /* Fork the program */
26 pid_t pid = fork();
27 switch (pid) {
28 case -1:
29 perror("Unable to fork");
30 exit(1);
31
32 case 0: { // We're the child
33 /* Open the log-file to log all stuff too */
34 _log_fd = FileHandle::Open(_log_file, "a");
35 if (!_log_fd.has_value()) {
36 perror("Unable to open logfile");
37 exit(1);
38 }
39 /* Redirect stdout and stderr to log-file */
40 if (dup2(fileno(*_log_fd), fileno(stdout)) == -1) {
41 perror("Rerouting stdout");
42 exit(1);
43 }
44 if (dup2(fileno(*_log_fd), fileno(stderr)) == -1) {
45 perror("Rerouting stderr");
46 exit(1);
47 }
48 break;
49 }
50
51 default:
52 /* We're the parent */
53 Debug(net, 0, "Loading dedicated server...");
54 Debug(net, 0, " - Forked to background with pid {}", pid);
55 exit(0);
56 }
57}
58#endif
FileHandle::Open
static std::optional< FileHandle > Open(const std::string &filename, const std::string &mode)
Open an RAII file handle if possible.
Definition fileio.cpp:1170
debug.h
Functions related to debugging.
Debug
#define Debug(category, level, format_string,...)
Ouptut a line of debugging information.
Definition debug.h:37
_log_file
std::string _log_file
Filename to reroute output of a forked OpenTTD to.
Definition dedicated.cpp:14
_log_fd
std::optional< FileHandle > _log_fd
File to reroute output of a forked OpenTTD to.
Definition dedicated.cpp:15
fileio_func.h
Functions for Standard In/Out file operations.
safeguards.h
A number of safeguards to prevent using unsafe methods.
stdafx.h
Definition of base types and functions in a cross-platform compatible way.