1 /* $Header: /cvsroot/wikipedia/willow/src/bin/willow/daemon.c,v 1.1 2005/05/02 19:15:21 kateturner Exp $ */
2 /* $NetBSD: daemon.c,v 1.9 2003/08/07 16:42:46 agc Exp $ */
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #if defined __SUNPRO_C || defined __DECC || defined __HP_cc
35 # pragma ident "@(#)$Header: /cvsroot/wikipedia/willow/src/bin/willow/daemon.c,v 1.1 2005/05/02 19:15:21 kateturner Exp $"
36 # pragma ident "$NetBSD: daemon.c,v 1.9 2003/08/07 16:42:46 agc Exp $"
42 #include <sys/types.h>
46 #include <sys/select.h>
48 int daemonize(int nochdir, int noclose, int wait_sigusr1);
49 int daemon_is_ready(void);
50 void sigusr1_handler(int sig);
54 void sigusr1_handler(int sig)
62 kill(parent_pid, SIGUSR1);
66 int daemonize(int nochdir, int noclose, int wait_sigusr1)
72 signal(SIGUSR1, sigusr1_handler);
88 while (waitpid(child, &status, 0) != child);
89 if (WIFEXITED(status))
91 exit_code= WEXITSTATUS(status);
93 if (WIFSIGNALED(status))
110 if(chdir("/") != 0) {
116 if (noclose == 0 && (fd = open("/dev/null", O_RDWR, 0)) != -1) {
117 if(dup2(fd, STDIN_FILENO) < 0) {
118 perror("dup2 stdin");
121 if(dup2(fd, STDOUT_FILENO) < 0) {
122 perror("dup2 stdout");
125 if(dup2(fd, STDERR_FILENO) < 0) {
126 perror("dup2 stderr");
130 if (fd > STDERR_FILENO) {