Index: CloudConnect/main.cpp
===================================================================
diff -u -r6d2ef8c97f4bb34204e95811839b3995000c47c1 -rb47dcc8b37ff07a7efec4dffd0ab1c6f63e5e614
--- CloudConnect/main.cpp	(.../main.cpp)	(revision 6d2ef8c97f4bb34204e95811839b3995000c47c1)
+++ CloudConnect/main.cpp	(.../main.cpp)	(revision b47dcc8b37ff07a7efec4dffd0ab1c6f63e5e614)
@@ -36,7 +36,13 @@
     QSocketNotifier notifier(sfd, QSocketNotifier::Read);
     QObject::connect(&notifier, &QSocketNotifier::activated, [&](int fd) {
         struct signalfd_siginfo info{};
-        (void)read(fd, &info, sizeof(info));
+        // signalfd delivers whole signalfd_siginfo records; a short read leaves
+        // info zeroed, so quitting on one would report no signal at all.
+        const ssize_t bytes = read(fd, &info, sizeof(info));
+        if (bytes != sizeof(info)) {
+            qWarning("Short read from signalfd (%zd bytes); ignoring", bytes);
+            return;
+        }
         if (info.ssi_signo == SIGINT) {
             log << "Application terminated by SIGINT";
         }