src/dedicated.cpp

   1 /* $Id$ */
   2
   3 /*
   4  * This file is part of OpenTTD.
   5  * 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.
   6  * 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.
   7  * 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/>.
   8  */
   9
  10 /** @file dedicated.cpp Forking support for dedicated servers. */
  11
  12 #include "stdafx.h"
  13
  14 #ifdef ENABLE_NETWORK
  15
  16 char *_log_file; ///< File to reroute output of a forked OpenTTD to
  17
  18 #if defined(UNIX) && !defined(__MORPHOS__)
  19
  20 #include <unistd.h>
  21
  22 #if (defined(SUNOS) && !defined(_LP64) && !defined(_I32LPx)) || defined(__HAIKU__)
  23 /* Solaris has, in certain situation, pid_t defined as long, while in other
  24  *  cases it has it defined as int... this handles all cases nicely.
  25  * Haiku has also defined pid_t as a long.
  26  */
  27 # define PRINTF_PID_T "%ld"
  28 #else
  29 # define PRINTF_PID_T "%d"
  30 #endif
  31
  32 void DedicatedFork()
  33 {
  34         /* Fork the program */
  35         pid_t pid = fork();
  36         switch (pid) {
  37                 case -1:
  38                         perror("Unable to fork");
  39                         exit(1);
  40
  41                 case 0: { // We're the child
  42                         FILE *f;
  43
  44                         /* Open the log-file to log all stuff too */
  45                         f = fopen(_log_file, "a");
  46                         if (f == NULL) {
  47                                 perror("Unable to open logfile");
  48                                 exit(1);
  49                         }
  50                         /* Redirect stdout and stderr to log-file */
  51                         if (dup2(fileno(f), fileno(stdout)) == -1) {
  52                                 perror("Rerouting stdout");
  53                                 exit(1);
  54                         }
  55                         if (dup2(fileno(f), fileno(stderr)) == -1) {
  56                                 perror("Rerouting stderr");
  57                                 exit(1);
  58                         }
  59                         break;
  60                 }
  61
  62                 default:
  63                         /* We're the parent */
  64                         printf("Loading dedicated server...\n");
  65                         printf("  - Forked to background with pid " PRINTF_PID_T "\n", pid);
  66                         exit(0);
  67         }
  68 }
  69 #endif
  70
  71 #else
  72
  73 /** Empty helper function call for NOT(UNIX and not MORPHOS) systems */
  74 void DedicatedFork() {}
  75
  76 #endif /* ENABLE_NETWORK */