Use SIGINT and remove unecessary terminate

test/test_masscanned.py

@@ -20,6 +20,7 @@ import atexit
 import functools
 import logging
 import os
+from signal import SIGINT
 import subprocess
 import sys
 from time import sleep
@@ -193,20 +194,16 @@ except AssertionError:
     result = -1
 
 # terminate masscanned
-masscanned.send_signal(2)
-masscanned.terminate()
+masscanned.send_signal(SIGINT)
 masscanned.wait()
 # terminate capture
 if TCPDUMP:
-    tcpdump.send_signal(2)
-    tcpdump.terminate()
+    tcpdump.send_signal(SIGINT)
     tcpdump.wait()
 if ZEEK_PASSIVERECON:
-    zeek.send_signal(2)
-    zeek.terminate()
+    zeek.send_signal(SIGINT)
     zeek.wait()
 if P0F:
-    p0f.send_signal(2)
-    p0f.terminate()
+    p0f.send_signal(SIGINT)
     p0f.wait()
 sys.exit(result)