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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 17:20:00 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 17:20:00 +0000
commit8daa83a594a2e98f39d764422bfbdbc62c9efd44 (patch)
tree4099e8021376c7d8c05bdf8503093d80e9c7bad0 /lib/util/become_daemon.c
parentInitial commit. (diff)
downloadsamba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.tar.xz
samba-8daa83a594a2e98f39d764422bfbdbc62c9efd44.zip
Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/util/become_daemon.c')
-rw-r--r--lib/util/become_daemon.c151
1 files changed, 151 insertions, 0 deletions
diff --git a/lib/util/become_daemon.c b/lib/util/become_daemon.c
new file mode 100644
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+++ b/lib/util/become_daemon.c
@@ -0,0 +1,151 @@
+/*
+ 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_STARTUP_NOTICE("daemon '%s' : %s\n", daemon, msg);
+}