Cleanup shared memory on SIGTERM, SIGHUP, and SIGINT, fixes #53

src/main.cpp

@@ -9,6 +9,7 @@
 #include <memory>
 #include <QIcon>
 #include <QDir>
+#include <signal.h>
 #include "widget.h"
 #include "hotkey.h"
 #include "returnbyscript.h"
@@ -17,15 +18,27 @@
 #include "config_parse.h"
 #include "config.h"
 
+SingleApplication *aptr;
+
 using namespace std;
 
+void quit(int sig)
+{
+    printf("Received signal %d, quitting\n", sig);
+    (*aptr).quit();
+}
+
 int main(int argc, char *argv[])
 {
     qRegisterMetaType<QItemSelection>("QItemSelection");
     SingleApplication a(argc, argv, "WEI.QIANG");
+    aptr = &a;
     QDir *config = new QDir;
     if (!config->exists(QString::fromStdString(CFPATH))) config->mkdir(QString::fromStdString(CFPATH));
     delete config;
+    signal(SIGTERM, quit);
+    signal(SIGHUP, quit);
+    signal(SIGINT, quit);
     if (a.isRunning())
     {
         QMessageBox* x = new QMessageBox();

src/singleapplication.cpp

@@ -29,6 +29,8 @@ SingleApplication::SingleApplication(int &argc, char *argv[], const QString uniq
         QTimer *timer = new QTimer(this);
         connect(timer, SIGNAL(timeout()), this, SLOT(checkForMessage()));
         timer->start(1000);
+
+        connect(this, SIGNAL(aboutToQuit()), this, SLOT(cleanup()));
     }
 }
 
@@ -53,6 +55,12 @@ void SingleApplication::checkForMessage()
     sharedMemory.unlock();
 }
 
+void SingleApplication::cleanup()
+{
+    // clean up shared memory before quitting
+    sharedMemory.detach();
+}
+
 // public functions.
 
 bool SingleApplication::isRunning()

src/singleapplication.h

@@ -15,6 +15,7 @@ class SingleApplication : public QApplication
 
 public slots:
     void checkForMessage();
+    void cleanup();
 
 signals:
     void messageAvailable(QString message);