Ensure that we have an valid intent before we launch it

src/anbox/android/intent.cpp

@@ -21,6 +21,12 @@
 
 namespace anbox {
 namespace android {
+bool Intent::valid() const {
+  // At the moment we only support component+package for intents
+  // (see android/service/android_api_skeleton.cpp for more details)
+  return !(component.empty() && package.empty());
+}
+
 std::ostream &operator<<(std::ostream &out, const Intent &intent) {
   out << "[";
   if (!intent.action.empty())

src/anbox/android/intent.h

@@ -31,6 +31,8 @@ struct Intent {
   std::string package;
   std::string component;
   std::vector<std::string> categories;
+
+  bool valid() const;
 };
 
 std::ostream &operator<<(std::ostream &out, const Intent &intent);

src/anbox/cmds/launch.cpp

@@ -79,6 +79,11 @@ anbox::cmds::Launch::Launch()
                       stack_));
 
   action([this](const cli::Command::Context&) {
+    if (!intent_.valid()) {
+      ERROR("The intent you provided is invalid. Please provide a correct launch intent.");
+      return EXIT_FAILURE;
+    }
+
     auto trap = core::posix::trap_signals_for_process({core::posix::Signal::sig_term, core::posix::Signal::sig_int});
     trap->signal_raised().connect([trap](const core::posix::Signal& signal) {
       INFO("Signal %i received. Good night.", static_cast<int>(signal));