fix(ipc): Add check if IPC init failed

Also add error code to debug message.

Partially fix #4785

src/ipc.cpp

@@ -72,7 +72,8 @@ IPC::IPC(uint32_t profileId)
     } else if (globalMemory.attach()) {
         qDebug() << "Attaching to the global shared memory";
     } else {
-        qDebug() << "Failed to attach to the global shared memory, giving up";
+        qDebug() << "Failed to attach to the global shared memory, giving up. Error:"
+                 << globalMemory.error();
         return; // We won't be able to do any IPC without being attached, let's get outta here
     }
 
@@ -189,6 +190,11 @@ bool IPC::waitUntilAccepted(time_t postTime, int32_t timeout /*=-1*/)
     return result;
 }
 
+bool IPC::isAttached() const
+{
+    return globalMemory.isAttached();
+}
+
 void IPC::setProfileId(uint32_t profileId)
 {
     this->profileId = profileId;

src/ipc.h

@@ -73,6 +73,7 @@ public:
     void registerEventHandler(const QString& name, IPCEventHandler handler);
     bool isEventAccepted(time_t time);
     bool waitUntilAccepted(time_t time, int32_t timeout = -1);
+    bool isAttached() const;
 
 public slots:
     void setProfileId(uint32_t profileId);

src/main.cpp

@@ -199,11 +199,16 @@ int main(int argc, char* argv[])
 
     uint32_t profileId = Settings::getInstance().getCurrentProfileId();
     IPC ipc(profileId);
+    if (!ipc.isAttached()) {
+        qCritical() << "Can't init IPC";
+        return EXIT_FAILURE;
+    }
+
     QObject::connect(&Settings::getInstance(), &Settings::currentProfileIdChanged, &ipc,
                      &IPC::setProfileId);
 
-    if (sodium_init() < 0) // For the auto-updater
-    {
+    // For the auto-updater
+    if (sodium_init() < 0) {
         qCritical() << "Can't init libsodium";
         return EXIT_FAILURE;
     }