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50337acaa5
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15377 Signed-off-by: Bjoern Jacke <bjacke@samba.org> Reviewed-by: Andrew Bartlett <abartlet@samba.org>
152 lines
4.0 KiB
C
152 lines
4.0 KiB
C
/*
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Unix SMB/CIFS implementation.
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Samba utility functions
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Copyright (C) Andrew Tridgell 1992-1998
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Copyright (C) Jeremy Allison 2001-2002
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Copyright (C) Simo Sorce 2001
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Copyright (C) Jim McDonough (jmcd@us.ibm.com) 2003.
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Copyright (C) James J Myers 2003
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "replace.h"
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#include "system/filesys.h"
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#include "system/locale.h"
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#if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
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#include <systemd/sd-daemon.h>
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#endif
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#include "close_low_fd.h"
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#include "debug.h"
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#include "become_daemon.h"
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static bool sd_notifications = true;
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/*******************************************************************
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Enable or disable daemon status systemd notifications
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********************************************************************/
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void daemon_sd_notifications(bool enable)
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{
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sd_notifications = enable;
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DBG_DEBUG("Daemon status systemd notifications %s\n",
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sd_notifications ? "enabled" : "disabled");
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}
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/****************************************************************************
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Become a daemon, discarding the controlling terminal.
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****************************************************************************/
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void become_daemon(bool do_fork, bool no_session, bool log_stdout)
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{
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pid_t newpid;
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if (do_fork) {
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newpid = fork();
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if (newpid == -1) {
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exit_daemon("Fork failed", errno);
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}
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if (newpid) {
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_exit(0);
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}
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#if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
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} else if (sd_notifications) {
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sd_notify(0, "STATUS=Starting process...");
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#endif
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}
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/* detach from the terminal */
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#ifdef HAVE_SETSID
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if (!no_session) {
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int ret = setsid();
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if (ret == -1) {
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exit_daemon("Failed to create session", errno);
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}
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}
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#elif defined(TIOCNOTTY)
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if (!no_session) {
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int i = open("/dev/tty", O_RDWR, 0);
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if (i != -1) {
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ioctl(i, (int) TIOCNOTTY, (char *)0);
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close(i);
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}
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}
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#endif /* HAVE_SETSID */
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/* Close fd's 0,1,2 as appropriate. Needed if started by rsh. */
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/* stdin must be open if we do not fork, for monitoring for
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* close. stdout must be open if we are logging there, and we
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* never close stderr (but debug might dup it onto a log file) */
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if (do_fork) {
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int ret = close_low_fd(0);
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if (ret != 0) {
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exit_daemon("close_low_fd(0) failed: %s\n", errno);
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}
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}
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if (!log_stdout) {
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int ret = close_low_fd(1);
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if (ret != 0) {
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exit_daemon("close_low_fd(1) failed: %s\n", errno);
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}
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}
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}
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void exit_daemon(const char *msg, int error)
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{
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if (msg == NULL) {
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msg = strerror(error);
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}
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#if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
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if (sd_notifications) {
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sd_notifyf(0, "STATUS=daemon failed to start: %s\n"
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"ERRNO=%i",
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msg,
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error);
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}
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#endif
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DBG_ERR("daemon failed to start: %s, error code %d\n",
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msg, error);
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exit(1);
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}
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void daemon_ready(const char *daemon)
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{
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if (daemon == NULL) {
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daemon = "Samba";
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}
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#if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
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if (sd_notifications) {
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sd_notifyf(0,
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"READY=1\nSTATUS=%s: ready to serve connections...",
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daemon);
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}
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#endif
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DBG_INFO("daemon '%s' finished starting up and ready to serve "
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"connections\n", daemon);
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}
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void daemon_status(const char *daemon, const char *msg)
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{
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if (daemon == NULL) {
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daemon = "Samba";
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}
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#if defined(HAVE_LIBSYSTEMD_DAEMON) || defined(HAVE_LIBSYSTEMD)
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if (sd_notifications) {
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sd_notifyf(0, "STATUS=%s: %s", daemon, msg);
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}
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#endif
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DBG_STARTUP_NOTICE("daemon '%s' : %s\n", daemon, msg);
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}
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