Fixed memory leaks on exit in faup1090.

Added catching of termination signals.

faup1090.c

@@ -59,6 +59,18 @@ void receiverPositionChanged(float lat, float lon, float alt)
  (void) alt;
 }
 
+static void sigintHandler(int dummy) {
+ MODES_NOTUSED(dummy);
+ signal(SIGINT, SIG_DFL); // reset signal handler - bit extra safety
+ Modes.exit = 1; // Signal to threads that we are done
+}
+
+static void sigtermHandler(int dummy) {
+ MODES_NOTUSED(dummy);
+ signal(SIGTERM, SIG_DFL); // reset signal handler - bit extra safety
+ Modes.exit = 1; // Signal to threads that we are done
+}
+
 //
 // =============================== Initialization ===========================
 //
@@ -146,9 +158,13 @@ int main(int argc, char **argv) {
  int stdout_option = 0;
  char *bo_connect_ipaddr = "127.0.0.1";
  char *bo_connect_port = "30005";
- struct client *c;
+ struct client *c, *d;
  struct net_service *beast_input, *fatsv_output;
 
+ // signal handlers:
+ signal(SIGINT, sigintHandler);
+ signal(SIGTERM, sigtermHandler);
+
  // Set sane defaults
  faupInitConfig();
 
@@ -187,7 +203,9 @@ int main(int argc, char **argv) {
 
  // Initialization
  faupInit();
- modesInitNet();
+ // We need only one service here created below, no need to call modesInitNet
+ Modes.clients = NULL;
+ Modes.services = NULL;
 
  // Set up input connection
  beast_input = makeBeastInputService();
@@ -203,14 +221,32 @@ int main(int argc, char **argv) {
 
  // Set up output connection on stdout
  fatsv_output = makeFatsvOutputService();
- createGenericClient(fatsv_output, STDOUT_FILENO);
+ d = createGenericClient(fatsv_output, STDOUT_FILENO);
 
  // Run it until we've lost either connection
  while (!Modes.exit && beast_input->connections && fatsv_output->connections) {
  backgroundTasks();
  usleep(100000);
  }
 
+ crcCleanupTables();
+
+ /* Go through tracked aircraft chain and free up any used memory */
+ struct aircraft *a = Modes.aircrafts, *n;
+ while(a) {
+ n = a->next;
+ if(a) free(a);
+ a = n;
+ }
+
+ // Free local service and client
+ if(fatsv_output->writer->data) free(fatsv_output->writer->data);
+ // Free only where we still have a connection
+ if(beast_input->connections) free(c);
+ if(fatsv_output->connections) free(d);
+ if(beast_input) free(beast_input);
+ if(fatsv_output) free(fatsv_output);
+
  return 0;
 }
 //