Added restart as recovery when connection to devices is lost.

Added a heardbeat-file into which a timestamp is written every second.

src/main.cpp

@@ -32,6 +32,7 @@ std::string socketPath = "/opt/growcontrol/growcontrold.socket";
 std::string log4cppConfig = "log4cpp.config";
 std::string host = "localhost";
 std::string workDir = "/opt/growcontrol";
+std::string heartBeatFile = "/opt/growcontrol/growcontrold.heartbeat";
 uint16_t port = 4223;
 bool daemonMode = false;
 int pid_fd = 0;
@@ -68,6 +69,7 @@ void printUsage(std::ostream& stream, std::string name) {
 		<< "\t-l   ... path to log4cpp config file" << std::endl
 		<< "\t-h   ... brickd address" << std::endl
 		<< "\t-p   ... brickd port" << std::endl
+		<< "\t-hb  ... heartbeat file" << std::endl
 		<< "\t-w   ... working directory" << std::endl;
 }
 
@@ -126,6 +128,15 @@ int main(int argc, char **argv) {
 				printUsage(std::cerr, argv[0]);
 				exit(1);
 			}
+		} else if (strcmp(argv[t], "-hb") == 0) {
+			if (t+1 < argc && argv[t+1][0] != '-') {
+				t++;
+				heartBeatFile = argv[t];
+			} else {
+				std::cerr << "Option -hb is missing an argument." << std::endl << std::endl;
+				printUsage(std::cerr, argv[0]);
+				exit(1);
+			}
 		} else if (strcmp(argv[t], "-p") == 0) {
 			if (t+1 < argc && argv[t+1][0] != '-') {
 				t++;
@@ -176,7 +187,7 @@ int main(int argc, char **argv) {
 			} catch (GCException &e) {
 			}
 
-			controller.mainLoop();
+			controller.mainLoop(heartBeatFile);
 
 			logger << log4cpp::Priority::WARN << "Shutting down ipc ...";