长时间测试后，解决删除已经消失的标记的问题。

module_templates/stdio/recv_adsb/recv_adsb.c

@@ -1319,14 +1319,13 @@ good_preamble:
 /* Show the currently captured interactive data on screen. */
 void interactiveShowData(void) {
     struct aircraft *a = Modes.aircrafts;
+	struct aircraft * before_a=0,*after_a = 0;
     time_t now = time(NULL);
     int count = 0;
-    //printf("\x1b[H\x1b[2J");    /* Clear the screen */
-/*    printf(
-"Hex    Flight   Altitude  Speed   Lat       Lon       Track  Messages Seen %s\n"
-"--------------------------------------------------------------------------------\n",
-        progress);
-*/
+	static time_t lastClearTime = 0;
+	static const int timeKeep=60;
+	if (lastClearTime==0)
+		lastClearTime = time(0);
     while(a ) {
 		if (a->need_display)
 		{
@@ -1339,13 +1338,12 @@ void interactiveShowData(void) {
 				speed *= 1.852;
 			}
 			fprintf(stdout,"source=adsb;destin=geomarker;function=update_icon;icon=flight;name=%s;lat=%f;lon=%f;rotate=%d;smooth=1;scale=%f\n",
-				a->hexaddr, a->lat, a->lon, a->track, (altitude/30000.0+1),
-				(int)(now - a->seen));
+				a->hexaddr, a->lat, a->lon, a->track, (altitude/30000.0+1));
 
 			fprintf(stdout,"source=adsb;destin=geomarker;function=update_props;name=%s;LABEL=%s;Alt=%d;Speed=%d;lat=%f;lon=%f;track=%d;msgs=%ld;time=%d;\n",
 				a->hexaddr, a->flight, altitude, speed,
 				a->lat, a->lon, a->track, a->messages,
-				(int)(now - a->seen));
+				(int)(now));
 			fflush(stdout);
 			fprintf(stderr,"%-6s %-8s %-9d %-7d %-7.03f   %-7.03f   %-3d   %-9ld %d sec\n",
             a->hexaddr, a->flight, altitude, speed,
@@ -1356,6 +1354,32 @@ void interactiveShowData(void) {
         a = a->next;
         count++;
     }
+	if (lastClearTime + timeKeep < now)
+	{
+		lastClearTime = now;
+		a = Modes.aircrafts;
+		before_a = 0;
+		while (a)
+		{
+			after_a = a->next;
+			if (a->seen + timeKeep < now)
+			{
+				printf ("source=adsb;destin=geomarker;function=delete_marks;name0=%s;\n",a->hexaddr);
+				//delete node
+				if (before_a)
+					before_a->next = after_a;
+				else
+					Modes.aircrafts = after_a;
+				free(a);
+				a = after_a;
+			}
+			if (a)
+			{
+				before_a = a;
+				a = a->next;
+			}				
+		}
+	}
 }
 /* When a new message is available, because it was decoded from the
  * RTL device, file, or received in the TCP input port, or any other
@@ -1571,7 +1595,6 @@ struct aircraft *interactiveReceiveData(struct modesMessage *mm) {
             aux = Modes.aircrafts;
             while(aux->next != a) aux = aux->next;
             /* Now we are a node before the aircraft to remove. */
-			printf("function=delete_marks;name0=%s;\n",a->hexaddr);
             aux->next = aux->next->next; /* removed. */
             /* Add on head */
             a->next = Modes.aircrafts;