summaryrefslogtreecommitdiff
path: root/src/compat/compat-daemon.c
blob: 509394254ae5f85437628609297dc634e573675c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
/*
 *  OpenVPN -- An application to securely tunnel IP networks
 *             over a single UDP port, with support for SSL/TLS-based
 *             session authentication and key exchange,
 *             packet encryption, packet authentication, and
 *             packet compression.
 *
 *  Copyright (C) 2011 - David Sommerseth <davids@redhat.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2
 *  as published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program (see the file COPYING included with this
 *  distribution); if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#elif defined(_MSC_VER)
#include "config-msvc.h"
#endif

#ifndef HAVE_DAEMON

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif

#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif

#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif

#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif

#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif

int
daemon(int nochdir, int noclose)
{
#if defined(HAVE_FORK) && defined(HAVE_SETSID)
    switch (fork()) {
        case -1:
            return (-1);

        case 0:
            break;

        default:
            exit(0);
    }

    if (setsid() == -1)
    {
        return (-1);
    }

    if (!nochdir)
    {
        chdir("/");
    }

    if (!noclose)
    {
#if defined(HAVE_DUP) && defined(HAVE_DUP2)
        int fd;
        if ((fd = open("/dev/null", O_RDWR, 0)) != -1)
        {
            dup2(fd, 0);
            dup2(fd, 1);
            dup2(fd, 2);
            if (fd > 2)
            {
                close(fd);
            }
        }
#endif
    }

    return 0;
#else  /* if defined(HAVE_FORK) && defined(HAVE_SETSID) */
    (void)nochdir;
    (void)noclose;
    errno = EFAULT;
    return -1;
#endif /* if defined(HAVE_FORK) && defined(HAVE_SETSID) */
}

#endif /* ifndef HAVE_DAEMON */