From f21dd9117dc470f47668439ede249916d0a8cd2c Mon Sep 17 00:00:00 2001
From: jtbr <user@users.noreply.github.com>
Date: Sun, 19 Mar 2017 17:55:26 +0100
Subject: [PATCH] Handle case of busybox netstat, with no pid support

---
 acme.sh | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/acme.sh b/acme.sh
index 671b0d33..d5d9f313 100755
--- a/acme.sh
+++ b/acme.sh
@@ -1131,8 +1131,12 @@ _ss() {
       elif netstat -help 2>&1 | grep -- '-P protocol' >/dev/null; then
         #for solaris
         netstat -an -P tcp | grep "\.$_port " | grep "LISTEN"
-      else
+      elif netstat -help 2>&1 | grep "\-p" > /dev/null; then
+        #for full linux
         netstat -ntpl | grep ":$_port "
+      else
+        #for busybox (embedded linux; no pid support)
+        netstat -ntl 2>/dev/null | grep ":$_port "
       fi
     fi
     return 0