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d74671e4 | 1 | /* OPENBSD ORIGINAL: lib/libc/gen/daemon.c */ |
2 | ||
beb43d31 | 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. | |
3e67f7df | 15 | * 3. Neither the name of the University nor the names of its contributors |
beb43d31 | 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 | ||
0b65b628 | 32 | #include "includes.h" |
beb43d31 | 33 | |
34 | #ifndef HAVE_DAEMON | |
35 | ||
36 | #if defined(LIBC_SCCS) && !defined(lint) | |
510a42ce | 37 | static char rcsid[] = "$OpenBSD: daemon.c,v 1.5 2003/07/15 17:32:41 deraadt Exp $"; |
beb43d31 | 38 | #endif /* LIBC_SCCS and not lint */ |
39 | ||
beb43d31 | 40 | int |
510a42ce | 41 | daemon(int nochdir, int noclose) |
beb43d31 | 42 | { |
43 | int fd; | |
44 | ||
45 | switch (fork()) { | |
46 | case -1: | |
47 | return (-1); | |
48 | case 0: | |
ffb8d130 | 49 | #ifdef HAVE_CYGWIN |
50 | register_9x_service(); | |
51 | #endif | |
beb43d31 | 52 | break; |
53 | default: | |
3c62e7eb | 54 | #ifdef HAVE_CYGWIN |
55 | /* | |
56 | * This sleep avoids a race condition which kills the | |
57 | * child process if parent is started by a NT/W2K service. | |
58 | */ | |
59 | sleep(1); | |
60 | #endif | |
beb43d31 | 61 | _exit(0); |
62 | } | |
63 | ||
64 | if (setsid() == -1) | |
65 | return (-1); | |
66 | ||
67 | if (!nochdir) | |
68 | (void)chdir("/"); | |
69 | ||
70 | if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) { | |
71 | (void)dup2(fd, STDIN_FILENO); | |
72 | (void)dup2(fd, STDOUT_FILENO); | |
73 | (void)dup2(fd, STDERR_FILENO); | |
74 | if (fd > 2) | |
75 | (void)close (fd); | |
76 | } | |
77 | return (0); | |
78 | } | |
79 | ||
80 | #endif /* !HAVE_DAEMON */ | |
81 |