From 56117d5e053f1fdf2577dc89d7f4aa37faf0d5e3 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 23 Jan 2019 11:14:57 +0200
Subject: Pass -w (wait) option to iptables

This is now necessary since we may be running multiple instances.
---
 bbot/agent/machine.cxx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/bbot/agent/machine.cxx b/bbot/agent/machine.cxx
index df23fde..db51e0b 100644
--- a/bbot/agent/machine.cxx
+++ b/bbot/agent/machine.cxx
@@ -47,6 +47,7 @@ namespace bbot
     //
     e = run_io_exit (t, 0, ofd, ofd,
                      "sudo",             "iptables",
+                     "-w",                            // Wait for xtables lock.
                      "-t",               "nat",
                      a,                  "PREROUTING",
                      "-i",               br,
@@ -65,6 +66,7 @@ namespace bbot
     //
     e = run_io_exit (t, 0, ofd, ofd,
                      "sudo",             "iptables",
+                     "-w",
                      a,                  "FORWARD",
                      "-d",               addr,
                      "-o",               br,
-- 
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