136 lines
3.8 KiB
C
136 lines
3.8 KiB
C
/*
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* static char *rcsid_daemon_c =
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* "$Id: daemon.c 11578 2009-02-23 22:02:27Z lalo $";
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*/
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/*
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CrossFire, A Multiplayer game for X-windows
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Copyright (C) 2002 Mark Wedel & Crossfire Development Team
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Copyright (C) 1992 Frank Tore Johansen
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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The author can be reached via e-mail to crossfire-devel@real-time.com
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*/
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/**
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* @file
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* Daemon mode for the server.
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*
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* Shamelessly swiped from xdm source code.
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* Appropriate copyrights kept, and hereby follow
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* ERic mehlhaff, 3/11/92
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*
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* xdm - display manager daemon
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*
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* $XConsortium: daemon.c,v 1.5 89/01/20 10:43:49 jim Exp $
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*
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* Copyright 1988 Massachusetts Institute of Technology
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*
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* Permission to use, copy, modify, and distribute this software and its
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* documentation for any purpose and without fee is hereby granted, provided
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* that the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of M.I.T. not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. M.I.T. makes no representations about the
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* suitability of this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*
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* Author: Keith Packard, MIT X Consortium
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*/
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#include <global.h>
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#ifndef __CEXTRACT__
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#include <sproto.h>
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#endif
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#include <sys/ioctl.h>
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#ifdef hpux
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#include <sys/ptyio.h>
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#endif
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#include <errno.h>
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#include <stdio.h>
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#include <sys/file.h>
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/**
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* Starts the server as a daemon.
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*/
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void become_daemon(void) {
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register int i;
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int forkresult;
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fputs("\n========================\n", logfile);
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fputs("Begin New Server Session\n", logfile);
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fputs("========================\n\n", logfile);
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/*
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* fork so that the process goes into the background automatically. Also
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* has a nice side effect of having the child process get inherited by
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* init (pid 1).
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*/
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if ((forkresult = fork())) { /* if parent */
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if (forkresult < 0) {
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perror("Fork error!");
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}
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exit(0); /* then no more work to do */
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}
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/*
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* Close standard file descriptors and get rid of controlling tty
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*/
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close(0);
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close(1);
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close(2);
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/*
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* Set up the standard file descriptors.
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*/
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(void)open("/dev/null", O_RDONLY); /* root inode already in core */
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(void)dup2(0, 1);
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(void)dup2(0, 2);
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if ((i = open("/dev/tty", O_RDWR)) >= 0) { /* did open succeed? */
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#if (defined(SYSV) || defined(hpux)) && defined(TIOCTTY)
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int zero = 0;
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(void)ioctl(i, TIOCTTY, &zero);
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#else
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# ifdef HAVE_SYS_TERMIOS_H
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# include <sys/termios.h>
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# else
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# ifdef HAVE_SYS_TTYCOM_H
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# include <sys/ttycom.h>
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# endif
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# endif
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(void)ioctl(i, TIOCNOTTY, (char *)0); /* detach, BSD style */
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#endif
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(void)close(i);
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}
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#ifdef HAVE_SETSID
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setsid();
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#else
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/* Are these really different? */
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# if defined(SYSV) || defined(SVR4)
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setpgrp(0, 0);
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# else /* Non SYSV machines */
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setpgrp(0, getpid());
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# endif
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#endif
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}
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