From 2c082fc1058653086f061afcb70d418442d384f9 Mon Sep 17 00:00:00 2001
From: realies <github@reali.es>
Date: Mon, 26 Nov 2018 22:34:52 +0000
Subject: [PATCH] fallback to /dev/tcp if no netcat

---
 wait-for | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/wait-for b/wait-for
index ddfc39e..cef482a 100755
--- a/wait-for
+++ b/wait-for
@@ -21,8 +21,12 @@ USAGE
 
 wait_for() {
   for i in `seq $TIMEOUT` ; do
-    nc -z "$HOST" "$PORT" > /dev/null 2>&1
-    
+    if which nc > /dev/null; then
+      nc -z "$HOST" "$PORT" > /dev/null 2>&1
+    else
+      (echo > /dev/tcp/$HOST/$PORT) > /dev/null 2>&1
+    fi
+
     result=$?
     if [ $result -eq 0 ] ; then
       if [ $# -gt 0 ] ; then