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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
/*
Unix SMB/CIFS implementation.
Samba utility functions
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Jeremy Allison 2001-2002
Copyright (C) Simo Sorce 2001
Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2003.
Copyright (C) James J Myers 2003
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
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. If not, see <http://www.gnu.org/licenses/>.
*/
#include "replace.h"
#include "system/filesys.h"
#include "system/locale.h"
#if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
#include <systemd/sd-daemon.h>
#endif
#include "close_low_fd.h"
#include "debug.h"
#include "become_daemon.h"
/*******************************************************************
Close the low 3 fd's and open dev/null in their place.
********************************************************************/
void close_low_fds(bool stdin_too, bool stdout_too, bool stderr_too)
{
if (stdin_too) {
int ret = close_low_fd(0);
if (ret != 0) {
DBG_ERR("close_low_fd(0) failed: %s\n", strerror(ret));
}
}
if (stdout_too) {
int ret = close_low_fd(1);
if (ret != 0) {
DBG_ERR("close_low_fd(1) failed: %s\n", strerror(ret));
}
}
if (stderr_too) {
int ret = close_low_fd(2);
if (ret != 0) {
DBG_ERR("close_low_fd(2) failed: %s\n", strerror(ret));
}
}
}
/****************************************************************************
Become a daemon, discarding the controlling terminal.
****************************************************************************/
void become_daemon(bool do_fork, bool no_session, bool log_stdout)
{
pid_t newpid;
if (do_fork) {
newpid = fork();
if (newpid == -1) {
exit_daemon("Fork failed", errno);
}
if (newpid) {
#if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
sd_notifyf(0,
"READY=0\nSTATUS=Starting process...\n"
"MAINPID=%lu",
(unsigned long) newpid);
#endif /* HAVE_LIBSYSTEMD_DAEMON */
_exit(0);
}
}
/* detach from the terminal */
#ifdef HAVE_SETSID
if (!no_session) {
int ret = setsid();
if (ret == -1) {
exit_daemon("Failed to create session", errno);
}
}
#elif defined(TIOCNOTTY)
if (!no_session) {
int i = open("/dev/tty", O_RDWR, 0);
if (i != -1) {
ioctl(i, (int) TIOCNOTTY, (char *)0);
close(i);
}
}
#endif /* HAVE_SETSID */
/* Close fd's 0,1,2 as appropriate. Needed if started by rsh. */
/* stdin must be open if we do not fork, for monitoring for
* close. stdout must be open if we are logging there, and we
* never close stderr (but debug might dup it onto a log file) */
close_low_fds(do_fork, !log_stdout, false);
}
void exit_daemon(const char *msg, int error)
{
#if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
if (msg == NULL) {
msg = strerror(error);
}
sd_notifyf(0, "STATUS=daemon failed to start: %s\n"
"ERRNO=%i",
msg,
error);
#endif
DBG_ERR("STATUS=daemon failed to start: %s, error code %d\n",
msg, error);
exit(1);
}
void daemon_ready(const char *daemon)
{
if (daemon == NULL) {
daemon = "Samba";
}
#if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
sd_notifyf(0, "READY=1\nSTATUS=%s: ready to serve connections...",
daemon);
#endif
DBG_ERR("STATUS=daemon '%s' finished starting up and ready to serve "
"connections\n", daemon);
}
void daemon_status(const char *daemon, const char *msg)
{
if (daemon == NULL) {
daemon = "Samba";
}
#if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
sd_notifyf(0, "\nSTATUS=%s: %s", daemon, msg);
#endif
DBG_ERR("STATUS=daemon '%s' : %s\n", daemon, msg);
}
|
