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/*
* Crossfire -- cooperative multi-player graphical RPG and adventure game
*
* Copyright (c) 1999-2014 Mark Wedel and the Crossfire Development Team
* Copyright (c) 1992 Frank Tore Johansen
*
* Crossfire is free software and comes with ABSOLUTELY NO WARRANTY. You are
* welcome to redistribute it under certain conditions. For details, please
* see COPYING and LICENSE.
*
* The authors can be reached via e-mail at <crossfire@metalforge.org>.
*/
/**
* @file
* Daemon mode for the server.
*
* 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>
#ifndef __CEXTRACT__
#include <sproto.h>
#endif
#include <sys/ioctl.h>
#ifdef hpux
#include <sys/ptyio.h>
#endif
#include <errno.h>
#include <stdio.h>
#include <sys/file.h>
/**
* Starts the server as a daemon.
*/
void become_daemon(void) {
register int i;
int forkresult;
/* Print a large banner to make different runs visible in the log. */
LOG(llevInfo, "========================\n");
LOG(llevInfo, "Begin New Server Session\n");
LOG(llevInfo, "========================\n");
/*
* 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("/dev/null", O_RDONLY); /* root inode already in core */
(void)dup2(0, 1);
(void)dup2(0, 2);
if ((i = open("/dev/tty", O_RDWR)) >= 0) { /* did open succeed? */
#if (defined(SYSV) || defined(hpux)) && defined(TIOCTTY)
int zero = 0;
(void)ioctl(i, TIOCTTY, &zero);
#else
# ifdef HAVE_TERMIOS_H
# include <termios.h>
# elif HAVE_SYS_TERMIOS_H
# include <sys/termios.h>
# else
# ifdef HAVE_SYS_TTYCOM_H
# include <sys/ttycom.h>
# endif
# endif
(void)ioctl(i, TIOCNOTTY, (char *)0); /* detach, BSD style */
#endif
(void)close(i);
}
#ifdef HAVE_SETSID
setsid();
#else
/* Are these really different? */
# if defined(SYSV) || defined(SVR4)
setpgrp(0, 0);
# else /* Non SYSV machines */
setpgrp(0, getpid());
# endif
#endif
}
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