From 9f3cffaadd1195b2f0c1b314536184e1d20e5179 Mon Sep 17 00:00:00 2001
From: Mark Wooding <mdw@distorted.org.uk>
Date: Sat, 23 Jul 2011 12:49:59 +0100
Subject: [PATCH] functions.m4: New function for arranging that an ipset
 exists.

---
 functions.m4 | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/functions.m4 b/functions.m4
index fd24364..05decbf 100644
--- a/functions.m4
+++ b/functions.m4
@@ -89,6 +89,19 @@ clearchain () {
   done
 }
 
+## makeset SET TYPE [PARAMS]
+##
+## Ensure that the named ipset exists.  Don't clear it.
+makeset () {
+  set -e
+  name=$1; shift
+  if ipset -nL | grep -q "^Name: $name$"; then
+    :
+  else
+    ipset -N "$name" "$@"
+  fi
+}
+
 ## errorchain CHAIN ACTION ARGS ...
 ##
 ## Make a chain which logs a message and then invokes some other action,
-- 
2.11.0