handle SIGTERM

0. CApplication::Stop cant be trusted. (deadlocks crashes and boo)

so, when shutdown/reboot is requested:

1. save an exit code (for CEC...)
2. call CPowerManager::{Reboot,PowerDown}
3. ... then systemd sends TERM and waits xx seconds before sending KILL
4. CApplication::Stop has xx seconds to save guisettings.xml and boo
5. CEC thread has xx seconds to switch off after it received OnQuit
6. addons / pvrmanager / cec / everything else.. are free to deadlock / crash now, we dont care
7. KILL

xbmc/Application.cpp

@@ -2493,12 +2493,12 @@ void CApplication::OnApplicationMessage(ThreadMessage* pMsg)
   switch (pMsg->dwMessage)
   {
   case TMSG_POWERDOWN:
-    Stop(EXITCODE_POWERDOWN);
+    SetExitCode(EXITCODE_POWERDOWN);
     g_powerManager.Powerdown();
     break;
 
   case TMSG_QUIT:
-    Stop(EXITCODE_QUIT);
+    SetExitCode(EXITCODE_QUIT);
     break;
 
   case TMSG_SHUTDOWN:
@@ -2544,12 +2544,13 @@ void CApplication::OnApplicationMessage(ThreadMessage* pMsg)
 
   case TMSG_RESTART:
   case TMSG_RESET:
-    Stop(EXITCODE_REBOOT);
+    SetExitCode(EXITCODE_REBOOT);
     g_powerManager.Reboot();
     break;
 
   case TMSG_RESTARTAPP:
 #if defined(TARGET_WINDOWS) || defined(TARGET_LINUX)
+    SetExitCode(EXITCODE_RESTARTAPP);
     Stop(EXITCODE_RESTARTAPP);
 #endif
     break;
@@ -2900,12 +2901,19 @@ bool CApplication::Cleanup()
   }
 }
 
+void CApplication::SetExitCode(int exitCode)
+{
+  // save it for CEC
+  m_ExitCode = exitCode;
+  m_ExitCodeSet = true;
+}
+
 void CApplication::Stop(int exitCode)
 {
   try
   {
     CVariant vExitCode(CVariant::VariantTypeObject);
-    vExitCode["exitcode"] = exitCode;
+    vExitCode["exitcode"] = m_ExitCode;
     CAnnouncementManager::Get().Announce(System, "xbmc", "OnQuit", vExitCode);
 
     // Abort any active screensaver
@@ -2932,7 +2940,6 @@ void CApplication::Stop(int exitCode)
 
     m_bStop = true;
     m_AppFocused = false;
-    m_ExitCode = exitCode;
     CLog::Log(LOGNOTICE, "stop all");
 
     // cancel any jobs from the jobmanager

xbmc/Application.h

@@ -159,6 +159,7 @@ class CApplication : public CXBApplicationEx, public IPlayerCallback, public IMs
   bool StartPVRManager();
   void StopPVRManager();
   bool IsCurrentThread() const;
+  void SetExitCode(int exitCode);
   void Stop(int exitCode);
   void RestartApp();
   void UnloadSkin(bool forReload = false);

xbmc/XBApplicationEx.cpp

@@ -40,6 +40,7 @@ CXBApplicationEx::CXBApplicationEx()
   m_bStop = false;
   m_AppFocused = true;
   m_ExitCode = EXITCODE_QUIT;
+  m_ExitCodeSet = false;
   m_renderGUI = false;
 }
 

xbmc/XBApplicationEx.h

@@ -40,6 +40,7 @@ class CXBApplicationEx : public IWindowManagerCallback
   // Variables for timing
   bool m_bStop;
   int  m_ExitCode;
+  bool m_ExitCodeSet;
   bool m_AppFocused;
   bool m_renderGUI;
 

xbmc/main/main.cpp

@@ -41,12 +41,27 @@
 #include "input/linux/LIRC.h"
 #endif
 #include "XbmcContext.h"
+#include "Application.h"
+
+void xbmc_term_handler(int signum)
+{
+  CLog::Log(LOGINFO, "Received SIGTERM...");
+  if (!g_application.m_ExitCodeSet)
+    g_application.SetExitCode(EXITCODE_RESTARTAPP);
+  g_application.Stop(EXITCODE_RESTARTAPP);
+}
 
 #ifdef __cplusplus
 extern "C"
 #endif
 int main(int argc, char* argv[])
 {
+  // SIGTERM handler
+  struct sigaction action;
+  memset(&action, 0, sizeof(struct sigaction));
+  action.sa_handler = xbmc_term_handler;
+  sigaction(SIGTERM, &action, NULL);
+
   // set up some xbmc specific relationships
   XBMC::Context context;