2 Unix SMB/CIFS implementation.
3 Samba utility functions
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2002
6 Copyright (C) Simo Sorce 2001
7 Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2003.
8 Copyright (C) James J Myers 2003
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "system/filesys.h"
26 #include "system/locale.h"
28 #include <systemd/sd-daemon.h>
31 /*******************************************************************
32 Close the low 3 fd's and open dev/null in their place.
33 ********************************************************************/
35 _PUBLIC_ int close_low_fd(int fd)
40 dev_null = open("/dev/null", O_RDWR, 0);
42 if ((dev_null == -1) && (errno = ENFILE)) {
44 * Try to free up an fd
52 dev_null = open("/dev/null", O_RDWR, 0);
54 dev_null = open("/dev/null", O_WRONLY, 0);
62 * This can happen in the ENFILE case above
67 ret = dup2(dev_null, fd);
78 _PUBLIC_ void close_low_fds(bool stdin_too, bool stdout_too, bool stderr_too)
82 int ret = close_low_fd(0);
84 DEBUG(0, ("%s: close_low_fd(0) failed: %s\n",
85 __func__, strerror(ret)));
89 int ret = close_low_fd(1);
91 DEBUG(0, ("%s: close_low_fd(1) failed: %s\n",
92 __func__, strerror(ret)));
96 int ret = close_low_fd(2);
98 DEBUG(0, ("%s: close_low_fd(2) failed: %s\n",
99 __func__, strerror(ret)));
104 /****************************************************************************
105 Become a daemon, discarding the controlling terminal.
106 ****************************************************************************/
108 _PUBLIC_ void become_daemon(bool do_fork, bool no_process_group, bool log_stdout)
115 sd_notifyf(0, "READY=0\nSTATUS=Starting process...\nMAINPID=%lu", (unsigned long) newpid);
116 #endif /* HAVE_SYSTEMD */
121 /* detach from the terminal */
123 if (!no_process_group) setsid();
124 #elif defined(TIOCNOTTY)
125 if (!no_process_group) {
126 int i = open("/dev/tty", O_RDWR, 0);
128 ioctl(i, (int) TIOCNOTTY, (char *)0);
132 #endif /* HAVE_SETSID */
134 /* Close fd's 0,1,2 as appropriate. Needed if started by rsh. */
135 /* stdin must be open if we do not fork, for monitoring for
136 * close. stdout must be open if we are logging there, and we
137 * never close stderr (but debug might dup it onto a log file) */
138 close_low_fds(do_fork, !log_stdout, false);
141 _PUBLIC_ void exit_daemon(const char *msg, int error)
145 msg = strerror(error);
148 sd_notifyf(0, "STATUS=daemon failed to start: %s\n"
153 DEBUG(0, ("STATUS=daemon failed to start: %s, error code %d\n", msg, error));
157 _PUBLIC_ void daemon_ready(const char *name)
163 sd_notifyf(0, "READY=1\nSTATUS=%s: ready to serve connections...", name);
165 DEBUG(0, ("STATUS=daemon '%s' finished starting up and ready to serve "
166 "connections\n", name));