From cf72d080b0cc5b20c06270695b5266a411b3bf16 Mon Sep 17 00:00:00 2001
From: Sergei Egorov <bsideup@gmail.com>
Date: Wed, 13 Jun 2018 22:12:29 +0200
Subject: [PATCH] Read from both `/proc/net/tcp` and `/proc/net/tcp6` in
 `InternalCommandPortListeningCheck` (#750)

---
 .../wait/internal/InternalCommandPortListeningCheck.java        | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/java/org/testcontainers/containers/wait/internal/InternalCommandPortListeningCheck.java b/core/src/main/java/org/testcontainers/containers/wait/internal/InternalCommandPortListeningCheck.java
index 2cf7092f1ae..a4ba013b9d7 100644
--- a/core/src/main/java/org/testcontainers/containers/wait/internal/InternalCommandPortListeningCheck.java
+++ b/core/src/main/java/org/testcontainers/containers/wait/internal/InternalCommandPortListeningCheck.java
@@ -30,7 +30,7 @@ public Boolean call() {
 
     private void tryPort(Integer internalPort) {
         String[][] commands = {
-                {"/bin/sh", "-c", format("cat /proc/net/tcp | awk '{print $2}' | grep -i :%x && echo %s", internalPort, SUCCESS_MARKER)},
+                {"/bin/sh", "-c", format("cat /proc/net/tcp{,6} | awk '{print $2}' | grep -i :%x && echo %s", internalPort, SUCCESS_MARKER)},
                 {"/bin/sh", "-c", format("nc -vz -w 1 localhost %d && echo %s", internalPort, SUCCESS_MARKER)},
                 {"/bin/bash", "-c", format("</dev/tcp/localhost/%d && echo %s", internalPort, SUCCESS_MARKER)}
         };