2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2011, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure, Markus Armbruster
6 * Empire 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 3 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, see <http://www.gnu.org/licenses/>.
21 * See files README, COPYING and CREDITS in the root of the source
22 * tree for related information and legal notices. It is expected
23 * that future projects/authors will amend these files as needed.
27 * disassoc.c: Boilerplate daemonization code
29 * Known contributors to this file:
31 * Markus Armbruster, 2005
35 * See W. Richard Stevens: UNIX Network Programming, Vol. 1
42 #include <sys/types.h>
44 #include "prototypes.h"
52 if ((pid = fork()) < 0)
55 _exit(0); /* parent */
57 /* Become session leader of new session, lose controlling tty */
61 /* Lose session leader status, so we can't acquire a controlling tty */
62 if ((pid = fork()) < 0)
65 _exit(0); /* parent */
66 /* Note: no controlling tty, therefore no SIGHUP sent */
68 /* datadir is working directory, that's fine */
70 /* We opened a bunch of files already, so just close 0..2 */
71 for (i = 0; i < 3; i++)
74 /* Library code may use 0..2; make sure that's safe */
75 open("/dev/null", O_RDWR);