server/server/daemon.C

/*
 * CrossFire, A Multiplayer game for X-windows
 * 
 * Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
 * Copyright (C) 2002 Mark Wedel & Crossfire Development Team
 * Copyright (C) 1992 Frank Tore Johansen
 * 
 * This program 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; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * The author can be reached via e-mail to <crossfire@schmorp.de>
 */

/*
 * BecomeDaemon.c
 * shamelessly swiped from xdm source code.
 * Appropriate copyrights kept, and hereby follow
 * ERic mehlhaff, 3/11/92
 *
 * xdm - display manager daemon
 *
 * $XConsortium: daemon.c,v 1.5 89/01/20 10:43:49 jim Exp $
 *
 * Copyright 1988 Massachusetts Institute of Technology
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for any purpose and without fee is hereby granted, provided
 * that the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of M.I.T. not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  M.I.T. makes no representations about the
 * suitability of this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * Author:  Keith Packard, MIT X Consortium
 */


#include <global.h>
#include <sproto.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <stdio.h>
#include <sys/file.h>

FILE * BecomeDaemon (const char *filename)
{
  FILE *logfile;
  int forkresult;

  if ((logfile = fopen (filename, "a")) == NULL)
    {
      fprintf (stderr, "Couldn't create logfile %s: %s\n", filename, strerror (errno));
      exit (0);
    }
  fputs ("\n========================\n", logfile);
  fputs ("Begin New Server Session\n", logfile);
  fputs ("========================\n\n", logfile);
  fflush (logfile);
  /*
   * fork so that the process goes into the background automatically. Also
   * has a nice side effect of having the child process get inherited by
   * init (pid 1).
   */

  if ((forkresult = fork ()))
    {                           /* if parent */
      if (forkresult < 0)
        {
          perror ("Fork error!");
        }
      exit (0);                 /* then no more work to do */
    }

  /*
   * Close standard file descriptors and get rid of controlling tty
   */

  close (0);
  close (1);
  close (2);

  /*
   * Set up the standard file descriptors.
   */
  (void) open ("/", O_RDONLY);  /* root inode already in core */
  (void) dup2 (0, 1);
  (void) dup2 (0, 2);

  setsid ();
  return (logfile);
}
Revision:	1.10
Committed:	Fri Apr 27 19:53:05 2007 UTC (17 years ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.9:	+0 -0 lines
State:	*FILE REMOVED*
Log Message:	revamp loggin. have a new log flag logBacktrace that logs the message and prepares a backtrace in the background, spewing it into the log at a later time. this is useful to shed some light on otherwise completely useless log messages such as: 2007-04-27 19:48:48.142 Calling random_roll with min=1 max=0 which could just as well not be there as we will never find out who is doing this to puny poor random_roll.
#	Content
1	/*
2	* CrossFire, A Multiplayer game for X-windows
3	*
4	* Copyright (C) 2005, 2006, 2007 Marc Lehmann & Crossfire+ Development Team
5	* Copyright (C) 2002 Mark Wedel & Crossfire Development Team
6	* Copyright (C) 1992 Frank Tore Johansen
7	*
8	* This program is free software; you can redistribute it and/or modify
9	* it under the terms of the GNU General Public License as published by
10	* the Free Software Foundation; either version 2 of the License, or
11	* (at your option) any later version.
12	*
13	* This program is distributed in the hope that it will be useful,
14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	* GNU General Public License for more details.
17	*
18	* You should have received a copy of the GNU General Public License
19	* along with this program; if not, write to the Free Software
20	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21	*
22	* The author can be reached via e-mail to <crossfire@schmorp.de>
23	*/
24
25	/*
26	* BecomeDaemon.c
27	* shamelessly swiped from xdm source code.
28	* Appropriate copyrights kept, and hereby follow
29	* ERic mehlhaff, 3/11/92
30	*
31	* xdm - display manager daemon
32	*
33	* $XConsortium: daemon.c,v 1.5 89/01/20 10:43:49 jim Exp $
34	*
35	* Copyright 1988 Massachusetts Institute of Technology
36	*
37	* Permission to use, copy, modify, and distribute this software and its
38	* documentation for any purpose and without fee is hereby granted, provided
39	* that the above copyright notice appear in all copies and that both that
40	* copyright notice and this permission notice appear in supporting
41	* documentation, and that the name of M.I.T. not be used in advertising or
42	* publicity pertaining to distribution of the software without specific,
43	* written prior permission. M.I.T. makes no representations about the
44	* suitability of this software for any purpose. It is provided "as is"
45	* without express or implied warranty.
46	*
47	* Author: Keith Packard, MIT X Consortium
48	*/
49
50
51	#include <global.h>
52	#include <sproto.h>
53	#include <sys/ioctl.h>
54	#include <errno.h>
55	#include <stdio.h>
56	#include <sys/file.h>
57
58	FILE * BecomeDaemon (const char *filename)
59	{
60	FILE *logfile;
61	int forkresult;
62
63	if ((logfile = fopen (filename, "a")) == NULL)
64	{
65	fprintf (stderr, "Couldn't create logfile %s: %s\n", filename, strerror (errno));
66	exit (0);
67	}
68	fputs ("\n========================\n", logfile);
69	fputs ("Begin New Server Session\n", logfile);
70	fputs ("========================\n\n", logfile);
71	fflush (logfile);
72	/*
73	* fork so that the process goes into the background automatically. Also
74	* has a nice side effect of having the child process get inherited by
75	* init (pid 1).
76	*/
77
78	if ((forkresult = fork ()))
79	{ /* if parent */
80	if (forkresult < 0)
81	{
82	perror ("Fork error!");
83	}
84	exit (0); /* then no more work to do */
85	}
86
87	/*
88	* Close standard file descriptors and get rid of controlling tty
89	*/
90
91	close (0);
92	close (1);
93	close (2);
94
95	/*
96	* Set up the standard file descriptors.
97	*/
98	(void) open ("/", O_RDONLY); /* root inode already in core */
99	(void) dup2 (0, 1);
100	(void) dup2 (0, 2);
101
102	setsid ();
103	return (logfile);
104	}