From 70293a6b766b3c761ba023d6f816e79c5d10de3d Mon Sep 17 00:00:00 2001
From: Gary Buhrmaster <gary.buhrmaster@gmail.com>
Date: Thu, 22 May 2014 22:11:27 +0000
Subject: [PATCH] Feature patch for backend systemd notify support

---
 mythtv/configure                             | 12 ++++++++++++
 mythtv/programs/mythbackend/main_helpers.cpp |  8 ++++++++
 mythtv/programs/mythbackend/mythbackend.pro  |  2 ++
 3 files changed, 22 insertions(+)

diff --git a/mythtv/configure b/mythtv/configure
index 325a23d1b44..866ab4c300d 100755
--- a/mythtv/configure
+++ b/mythtv/configure
@@ -136,6 +136,7 @@ Advanced options (experts only):
   --disable-opengl-video   disable OpenGL based video display
   --disable-quartz-video   disable Mac OS X CoreVideo based video display
   --disable-libass         disable libass SSA/ASS subtitle support
+  --disable-systemd_notify disable systemd notify support
 
   --enable-mac-bundle      produce standalone OS X apps (e.g. mythfrontend.app)
 
@@ -1819,6 +1820,7 @@ MYTHTV_CONFIG_LIST='
     profiletype
     debugtype
     mythlogserver
+    systemd_notify
 '
 
 MYTHTV_HAVE_LIST='
@@ -2646,6 +2648,7 @@ enable libfftw3
 enable taglib
 disable mythlogserver
 enable exiv2
+enable systemd_notify
 
 # mythtv paths
 dvb_path_default="${sysroot}/usr/include"
@@ -5384,6 +5387,14 @@ enabled asi && check_cc <<EOF || disable asi
 int main(void) { return 1; }
 EOF
 
+if enabled systemd_notify ; then
+   if check_pkg_config libsystemd-daemon systemd/sd-daemon.h sd_notify ; then
+        require_pkg_config libsystemd-daemon systemd/sd-daemon.h sd_notify
+   else
+        disable systemd_notify
+   fi
+fi
+
 # Check that all MythTV build "requirements" are met:
 enabled lamemp3 && check_lib2 lame/lame.h lame_init -lmp3lame -lm ||
     die "ERROR! You must have the Lame MP3 encoding library installed to compile MythTV."
@@ -6031,6 +6042,7 @@ echo "Frontend                  ${frontend-no}"
 echo "Backend                   ${backend-no}"
 echo "OpenGL ES 2.0             ${opengles-no}"
 echo "mythlogserver             ${mythlogserver-no}"
+echo "systemd_notify            ${systemd_notify-no}"
 echo
 
 echo "# Bindings"
diff --git a/mythtv/programs/mythbackend/main_helpers.cpp b/mythtv/programs/mythbackend/main_helpers.cpp
index f5ecef8f5ec..cf1f77875f2 100644
--- a/mythtv/programs/mythbackend/main_helpers.cpp
+++ b/mythtv/programs/mythbackend/main_helpers.cpp
@@ -11,6 +11,9 @@
 #if CONFIG_DARWIN
     #include <sys/aio.h>    // O_SYNC
 #endif
+#ifdef USING_SYSTEMD_NOTIFY
+    #include <systemd/sd-daemon.h>
+#endif
 
 // C headers
 #include <cstdlib>
@@ -696,6 +699,11 @@ int run_backend(MythBackendCommandLineParser &cmdline)
     if (gCoreContext->IsMasterBackend())
         gCoreContext->SendSystemEvent("MASTER_STARTED");
 
+#ifdef USING_SYSTEMD_NOTIFY
+    // Provide systemd ready notification (for type=notify units)
+    (void)sd_notify(0, "READY=1");
+#endif
+
     ///////////////////////////////
     ///////////////////////////////
     exitCode = qApp->exec();
diff --git a/mythtv/programs/mythbackend/mythbackend.pro b/mythtv/programs/mythbackend/mythbackend.pro
index 71b9cd6f50f..78175b788a9 100644
--- a/mythtv/programs/mythbackend/mythbackend.pro
+++ b/mythtv/programs/mythbackend/mythbackend.pro
@@ -59,6 +59,8 @@ using_valgrind:DEFINES += USING_VALGRIND
 
 using_libdns_sd:DEFINES += USING_LIBDNS_SD
 
+using_systemd_notify:DEFINES += USING_SYSTEMD_NOTIFY
+
 xml_conf.path = $${PREFIX}/share/mythtv/backend-config/
 xml_conf.files = config_backend_general.xml config_backend_database.xml