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
36 #if defined __SUNPRO_C || defined __DECC || defined __HP_cc
37 # pragma ident "@(#)$Header: /cvsroot/wikipedia/willow/src/bin/willow/daemon.c,v 1.1 2005/05/02 19:15:21 kateturner Exp $"
38 # pragma ident "$NetBSD: daemon.c,v 1.9 2003/08/07 16:42:46 agc Exp $"
44 #include <sys/types.h>
48 #include <sys/select.h>
50 #include <util/daemon.hpp>
54 namespace datadifferential
{
62 static void sigusr1_handler(int sig
)
72 bool daemon_is_ready(bool close_io
)
74 if (kill(parent_pid
, SIGUSR1
) == -1)
80 if (close_io
== false)
86 if ((fd
= open("/dev/null", O_RDWR
, 0)) < 0)
93 if (dup2(fd
, STDIN_FILENO
) < 0)
99 if (dup2(fd
, STDOUT_FILENO
) < 0)
101 perror("dup2 stdout");
105 if (dup2(fd
, STDERR_FILENO
) < 0)
107 perror("dup2 stderr");
111 if (fd
> STDERR_FILENO
)
124 #ifndef __INTEL_COMPILER
125 #pragma GCC diagnostic ignored "-Wold-style-cast"
128 bool daemonize(bool is_chdir
, bool wait_sigusr1
)
130 struct sigaction new_action
;
132 new_action
.sa_handler
= sigusr1_handler
;
133 sigemptyset(&new_action
.sa_mask
);
134 new_action
.sa_flags
= 0;
135 sigaction(SIGUSR1
, &new_action
, NULL
);
137 parent_pid
= getpid();
153 int exit_code
= EXIT_FAILURE
;
155 while (waitpid(child
, &status
, 0) != child
)
158 if (WIFEXITED(status
))
160 exit_code
= WEXITSTATUS(status
);
162 if (WIFSIGNALED(status
))
164 exit_code
= EXIT_FAILURE
;
193 } /* namespace util */
194 } /* namespace datadifferential */