From bcf47ae308e4ca8384e651b5a48fad74fc462435 Mon Sep 17 00:00:00 2001
From: sunus <sunuslee@gmail.com>
Date: Fri, 3 Mar 2017 13:27:11 +0800
Subject: [PATCH] support mac os

on mac osx , netstat need to using -p tcp to get only tcp output.
tested on
osx with bash && zsh
linux with bash && zsh
---
 tcp-connection-state-counter.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tcp-connection-state-counter.sh b/tcp-connection-state-counter.sh
index 59323ae8..0024851d 100755
--- a/tcp-connection-state-counter.sh
+++ b/tcp-connection-state-counter.sh
@@ -6,8 +6,8 @@
 #   $ ./tcp-connection-state-counter.sh
 #
 # @author Jerry Lee
-
-netstat -tna | awk 'NR > 2 {
+# on mac osx , netstat need to using -p tcp to get only tcp output.
+netstat -tna `[ ! -z $(uname|grep Darwin) ] && echo "-ptcp"` | awk 'NR > 2 {
     s[$NF]++
 }