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/* |
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* static char *rcsid_daemon_c = |
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* "$Id: daemon.c,v 1.6 2005/09/04 16:58:12 akirschbaum Exp $"; |
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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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* BecomeDaemon.c |
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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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FILE *BecomeDaemon (char *filename) |
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{ |
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FILE *logfile; |
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register int i; |
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int forkresult; |
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if((logfile=fopen(filename,"a"))==NULL){ |
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fprintf(stderr, "Couldn't create logfile %s: %s\n", filename, strerror_local(errno)); |
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exit(0); |
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} |
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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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fflush(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 ("/", 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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return(logfile); |
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} |
