From 4a56eb18976700f6fc460a1b910544421a484cf2 Mon Sep 17 00:00:00 2001
From: Sven Hartge <sven@svenhartge.de>
Date: Fri, 20 Apr 2012 15:19:22 +0200
Subject: [PATCH] arp: use only awk to process ARP cache

Simplify the processing of the output of arp -an to use only awk.
Reduces the needed subprocesses in the pipe.
---
 plugins/arp/arp  | 3 +--
 plugins/arp/arp_ | 3 +--
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/plugins/arp/arp b/plugins/arp/arp
index a6657551..8addffa3 100755
--- a/plugins/arp/arp
+++ b/plugins/arp/arp
@@ -38,6 +38,5 @@ if [ "$1" = "config" ]; then
 	exit 0
 fi
 
-echo -n "entries.value "
-arp -an | grep -v "incomplete" | awk '{ print $4; }' | sort -u | wc -l 
+arp -an | awk 'BEGIN { regex="<incomplete>";} { if (!match($4,regex)) { a[$4] }} END{for(i in a){n++};print "entries.value " n}'
 
diff --git a/plugins/arp/arp_ b/plugins/arp/arp_
index 24667f02..adbd86c3 100755
--- a/plugins/arp/arp_
+++ b/plugins/arp/arp_
@@ -51,6 +51,5 @@ if [ "$1" = "config" ]; then
 	exit 0
 fi
 
-echo -n "entries.value "
-arp -an -i $INTERFACE | grep -v "incomplete" | awk '{ print $4; }' | sort -u | wc -l 
+arp -an -i $INTERFACE | awk 'BEGIN { regex="<incomplete>";} { if (!match($4,regex)) { a[$4] }} END{for(i in a){n++};print "entries.value " n}'