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e00da40d | 1 | /* $OpenBSD: daemon.c,v 1.6 2005/08/08 08:05:33 espie Exp $ */ |
3c0ef626 | 2 | /*- |
3 | * Copyright (c) 1990, 1993 | |
4 | * The Regents of the University of California. All rights reserved. | |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions | |
8 | * are met: | |
9 | * 1. Redistributions of source code must retain the above copyright | |
10 | * notice, this list of conditions and the following disclaimer. | |
11 | * 2. Redistributions in binary form must reproduce the above copyright | |
12 | * notice, this list of conditions and the following disclaimer in the | |
13 | * documentation and/or other materials provided with the distribution. | |
70791e56 | 14 | * 3. Neither the name of the University nor the names of its contributors |
3c0ef626 | 15 | * may be used to endorse or promote products derived from this software |
16 | * without specific prior written permission. | |
17 | * | |
18 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
19 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
22 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
23 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
24 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
25 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
26 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
27 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
28 | * SUCH DAMAGE. | |
29 | */ | |
30 | ||
e00da40d | 31 | /* OPENBSD ORIGINAL: lib/libc/gen/daemon.c */ |
32 | ||
3c0ef626 | 33 | #include "includes.h" |
34 | ||
35 | #ifndef HAVE_DAEMON | |
36 | ||
2e437378 | 37 | #include <sys/types.h> |
38 | ||
39 | #ifdef HAVE_SYS_STAT_H | |
40 | # include <sys/stat.h> | |
41 | #endif | |
42 | ||
43 | #ifdef HAVE_FCNTL_H | |
44 | # include <fcntl.h> | |
45 | #endif | |
46 | ||
47 | #ifdef HAVE_UNISTD_H | |
48 | # include <unistd.h> | |
49 | #endif | |
50 | ||
3c0ef626 | 51 | int |
70791e56 | 52 | daemon(int nochdir, int noclose) |
3c0ef626 | 53 | { |
54 | int fd; | |
55 | ||
56 | switch (fork()) { | |
57 | case -1: | |
58 | return (-1); | |
59 | case 0: | |
e9a17296 | 60 | #ifdef HAVE_CYGWIN |
61 | register_9x_service(); | |
62 | #endif | |
3c0ef626 | 63 | break; |
64 | default: | |
65 | #ifdef HAVE_CYGWIN | |
66 | /* | |
67 | * This sleep avoids a race condition which kills the | |
68 | * child process if parent is started by a NT/W2K service. | |
69 | */ | |
70 | sleep(1); | |
71 | #endif | |
72 | _exit(0); | |
73 | } | |
74 | ||
75 | if (setsid() == -1) | |
76 | return (-1); | |
77 | ||
78 | if (!nochdir) | |
79 | (void)chdir("/"); | |
80 | ||
81 | if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) { | |
82 | (void)dup2(fd, STDIN_FILENO); | |
83 | (void)dup2(fd, STDOUT_FILENO); | |
84 | (void)dup2(fd, STDERR_FILENO); | |
85 | if (fd > 2) | |
86 | (void)close (fd); | |
87 | } | |
88 | return (0); | |
89 | } | |
90 | ||
91 | #endif /* !HAVE_DAEMON */ | |
92 |