Change function for calling iptables.

- get rid of ResourceWarning: subprocess xx is still running

1 files changed, 3 insertions, 1 deletions

diff --git a/src/msec/tools.py b/src/msec/tools.py
index c9be55d..f62c1bc 100755
--- a/src/msec/tools.py
+++ b/src/msec/tools.py
@@ -8,6 +8,7 @@ import stat
 import sys
 import time
 import locale
+import subprocess
 
 # localization
 import gettext
@@ -25,7 +26,8 @@ def find_firewall_info(log):
     # read firewall settings
     firewall_entries = []
     try:
-        data = os.popen("iptables -S").readlines()
+        p = subprocess.run(["iptables", "-S"], capture_output=True)
+        data = p.stdout
         for l in data:
             if l[:3] == "-A ":
                 firewall_entries.append(l.strip())