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/*
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"
static bool sd_notifications = true;
/*******************************************************************
Enable or disable daemon status systemd notifications
********************************************************************/
void daemon_sd_notifications(bool enable)
{
sd_notifications = enable;
DBG_DEBUG("Daemon status systemd notifications %s\n",
sd_notifications ? "enabled" : "disabled");
}
/****************************************************************************
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) {
_exit(0);
}
#if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
} else if (sd_notifications) {
sd_notify(0, "STATUS=Starting process...");
#endif
}
/* 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) */
if (do_fork) {
int ret = close_low_fd(0);
if (ret != 0) {
exit_daemon("close_low_fd(0) failed: %s\n", errno);
}
}
if (!log_stdout) {
int ret = close_low_fd(1);
if (ret != 0) {
exit_daemon("close_low_fd(1) failed: %s\n", errno);
}
}
}
void exit_daemon(const char *msg, int error)
{
if (msg == NULL) {
msg = strerror(error);
}
#if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
if (sd_notifications) {
sd_notifyf(0, "STATUS=daemon failed to start: %s\n"
"ERRNO=%i",
msg,
error);
}
#endif
DBG_ERR("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)
if (sd_notifications) {
sd_notifyf(0,
"READY=1\nSTATUS=%s: ready to serve connections...",
daemon);
}
#endif
DBG_INFO("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)
if (sd_notifications) {
sd_notifyf(0, "STATUS=%s: %s", daemon, msg);
}
#endif
DBG_ERR("daemon '%s' : %s\n", daemon, msg);
}
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