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.
#	User	Rev	Content
1	elmex	1.1	/*
2	pippijn	1.9	* 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	elmex	1.1
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	root	1.7	#include <sproto.h>
53	elmex	1.1	#include <sys/ioctl.h>
54			#include <errno.h>
55			#include <stdio.h>
56			#include <sys/file.h>
57
58	root	1.5	FILE * BecomeDaemon (const char *filename)
59	elmex	1.1	{
60			FILE *logfile;
61			int forkresult;
62
63	root	1.5	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	elmex	1.1	}