source: subversion/applications/utils/mod_tile/daemon_compat.c @ 29086

Last change on this file since 29086 was 28714, checked in by apmon, 7 years ago

[mod_tile] Add some configure compatibility fixes for solaris

File size: 2.7 KB
Line 
1/*-
2 * Copyright (c) 1990, 1993
3 *The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include "config.h"
31#ifndef HAVE_DAEMON
32
33#ifdef HAVE_SYS_CDEFS_C
34#include <sys/cdefs.h>
35#endif
36
37#include <errno.h>
38#include <fcntl.h>
39#include <stdlib.h>
40#include <signal.h>
41#include <unistd.h>
42#ifdef HAVE_PATHS_H
43#include <paths.h>
44#endif
45#ifndef _PATH_DEVNULL
46#define _PATH_DEVNULL "/dev/null"
47#endif
48
49int
50daemon(nochdir, noclose)
51     int nochdir, noclose;
52{
53  struct sigaction osa, sa;
54  int fd;
55  pid_t newgrp;
56  int oerrno;
57  int osa_ok;
58
59  /* A SIGHUP may be thrown when the parent exits below. */
60  sigemptyset(&sa.sa_mask);
61  sa.sa_handler = SIG_IGN;
62  sa.sa_flags = 0;
63  osa_ok = sigaction(SIGHUP, &sa, &osa);
64
65  switch (fork()) {
66  case -1:
67    return (-1);
68  case 0:
69    break;
70  default:
71    exit(0);
72  }
73
74  newgrp = setsid();
75  oerrno = errno;
76  if (osa_ok != -1)
77    sigaction(SIGHUP, &osa, NULL);
78
79  if (newgrp == -1) {
80    errno = oerrno;
81    return (-1);
82  }
83
84  if (!nochdir)
85    (void)chdir("/");
86
87  if (!noclose && (fd = open(_PATH_DEVNULL, O_RDWR, 0)) != -1) {
88    dup2(fd, STDIN_FILENO);
89    dup2(fd, STDOUT_FILENO);
90    dup2(fd, STDERR_FILENO);
91    if (fd > 2)
92      close(fd);
93  }
94  return (0);
95}
96#endif
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