2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2010, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * See files README, COPYING and CREDITS in the root of the source
23 * tree for related information and legal notices. It is expected
24 * that future projects/authors will amend these files as needed.
28 * disassoc.c: Boilerplate daemonization code
30 * Known contributors to this file:
32 * Markus Armbruster, 2005
36 * See W. Richard Stevens: UNIX Network Programming, Vol. 1
43 #include <sys/types.h>
45 #include "prototypes.h"
53 if ((pid = fork()) < 0)
56 _exit(0); /* parent */
58 /* Become session leader of new session, lose controlling tty */
62 /* Lose session leader status, so we can't acquire a controlling tty */
63 if ((pid = fork()) < 0)
66 _exit(0); /* parent */
67 /* Note: no controlling tty, therefore no SIGHUP sent */
69 /* datadir is working directory, that's fine */
71 /* We opened a bunch of files already, so just close 0..2 */
72 for (i = 0; i < 3; i++)
75 /* Library code may use 0..2; make sure that's safe */
76 open("/dev/null", O_RDWR);