Kill bridges (child processes) when main carla dies

source/bridges-plugin/CarlaBridgePlugin.cpp

@@ -25,6 +25,10 @@
 # include <signal.h>
 #endif
 
+#ifdef CARLA_OS_LINUX
+# include <sys/prctl.h>
+#endif
+
 #ifdef HAVE_X11
 # include <X11/Xlib.h>
 #endif
@@ -382,6 +386,12 @@ int main(int argc, char* argv[])
         rtClientBaseName[6]    = '\0';
         nonRtClientBaseName[6] = '\0';
         nonRtServerBaseName[6] = '\0';
+
+#ifdef CARLA_OS_LINUX
+        // terminate ourselves if main carla dies
+        ::prctl(PR_SET_PDEATHSIG, SIGTERM);
+        // TODO, osx version too, see https://stackoverflow.com/questions/284325/how-to-make-child-process-die-after-parent-exits
+#endif
     }
     else
     {

source/bridges-ui/CarlaBridgeUI.cpp

@@ -20,6 +20,11 @@
 
 #include "CarlaBase64Utils.hpp"
 
+#ifdef CARLA_OS_LINUX
+# include <signal.h>
+# include <sys/prctl.h>
+#endif
+
 // needed for atom-util
 #ifndef nullptr
 # undef NULL
@@ -333,6 +338,12 @@ void CarlaBridgeUI::exec(const bool showUI)
 {
     CARLA_SAFE_ASSERT_RETURN(fToolkit != nullptr,);
 
+#ifdef CARLA_OS_LINUX
+    // kill ourselves if main carla dies
+    ::prctl(PR_SET_PDEATHSIG, SIGKILL);
+    // TODO, osx version too, see https://stackoverflow.com/questions/284325/how-to-make-child-process-die-after-parent-exits
+#endif
+
     fToolkit->exec(showUI);
 }
 

source/libjack/libjack.cpp

@@ -15,8 +15,8 @@
  * For a full copy of the GNU General Public License see the doc/GPL.txt file.
  */
 
-// need to include this first
 #include "libjack.hpp"
+#include <sys/prctl.h>
 
 using juce::File;
 using juce::FloatVectorOperations;
@@ -51,6 +51,12 @@ public:
         const char* const libjackSetup(std::getenv("CARLA_LIBJACK_SETUP"));
         CARLA_SAFE_ASSERT_RETURN(libjackSetup != nullptr && std::strlen(libjackSetup) == 5,);
 
+        // make sure we don't get loaded again
+        carla_unsetenv("CARLA_SHM_IDS");
+
+        // kill ourselves if main carla dies
+        ::prctl(PR_SET_PDEATHSIG, SIGKILL);
+
         for (int i=4; --i >= 0;) {
             CARLA_SAFE_ASSERT_RETURN(libjackSetup[i] >= '0' && libjackSetup[i] <= '0'+64,);
         }

source/utils/CarlaPipeUtils.cpp

@@ -42,6 +42,9 @@
 # include <cerrno>
 # include <signal.h>
 # include <sys/wait.h>
+# ifdef CARLA_OS_LINUX
+#  include <sys/prctl.h>
+# endif
 #endif
 
 #ifndef F_SETPIPE_SZ
@@ -1490,6 +1493,14 @@ bool CarlaPipeClient::initPipeClient(const char* argv[]) noexcept
     try { ::close(pipeRecvClient); } CARLA_SAFE_EXCEPTION("close(pipeRecvClient)");
     try { ::close(pipeSendClient); } CARLA_SAFE_EXCEPTION("close(pipeSendClient)");
     pipeRecvClient = pipeSendClient = INVALID_PIPE_VALUE;
+
+    //----------------------------------------------------------------
+    // kill ourselves if parent dies
+
+# ifdef CARLA_OS_LINUX
+    ::prctl(PR_SET_PDEATHSIG, SIGKILL);
+    // TODO, osx version too, see https://stackoverflow.com/questions/284325/how-to-make-child-process-die-after-parent-exits
+# endif
 #endif
 
     //----------------------------------------------------------------