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 $ */
3 /*-
4 * Copyright (c) 1990, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 #if defined __SUNPRO_C || defined __DECC || defined __HP_cc
33 # pragma ident "@(#)$Header: /cvsroot/wikipedia/willow/src/bin/willow/daemon.c,v 1.1 2005/05/02 19:15:21 kateturner Exp $"
34 # pragma ident "$NetBSD: daemon.c,v 1.9 2003/08/07 16:42:46 agc Exp $"
35 #endif
36
37 #include <fcntl.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <unistd.h>
41
42 #include "memcached.h"
43
daemonize(int nochdir,int noclose)44 int daemonize(int nochdir, int noclose)
45 {
46 int fd;
47
48 switch (fork()) {
49 case -1:
50 return (-1);
51 case 0:
52 break;
53 default:
54 _exit(EXIT_SUCCESS);
55 }
56
57 if (setsid() == -1)
58 return (-1);
59
60 if (nochdir == 0) {
61 if(chdir("/") != 0) {
62 perror("chdir");
63 return (-1);
64 }
65 }
66
67 if (noclose == 0 && (fd = open("/dev/null", O_RDWR, 0)) != -1) {
68 if(dup2(fd, STDIN_FILENO) < 0) {
69 perror("dup2 stdin");
70 goto err_cleanup;
71 }
72 if(dup2(fd, STDOUT_FILENO) < 0) {
73 perror("dup2 stdout");
74 goto err_cleanup;
75 }
76 if(dup2(fd, STDERR_FILENO) < 0) {
77 perror("dup2 stderr");
78 goto err_cleanup;
79 }
80
81 if(close(fd) < 0) {
82 perror("close");
83 return (-1);
84 }
85 }
86 return (0);
87
88 err_cleanup:
89 close(fd);
90 return (-1);
91 }
92