Add support to down some interfaces before shutting down the system. All

pppoe*  interfaces are automatically shut down by this script, others may be
added to the force_down_interfaces variable in /etc/rc.conf.

etc/defaults/rc.conf

@@ -1,4 +1,4 @@
-#	$NetBSD: rc.conf,v 1.19 2001/07/05 05:26:57 tron Exp $
+#	$NetBSD: rc.conf,v 1.20 2001/09/04 18:09:13 martin Exp $
 #
 # /etc/defaults/rc.conf --
 #	default configuration of /etc/rc.conf
@@ -111,6 +111,12 @@ ip6mode=host					# host, autohost or router
 ip6sitelocal=NO					# IPv6 sitelocal addrs
 rtsol=NO		rtsol_flags=""		# for ip6mode=autohost only
 
+# Special treatment for interfaces that need to be downed on
+# shutdown (because they might cause unecessary costs or block resources
+# on the peer). All pppoe* interfaces are automatically included in this
+# list, add others here manually.
+# force_down_interfaces=""
+
 # ALTQ configuration/monitoring daemon
 altqd=NO		altqd_flags=""
 

etc/rc.d/downinterfaces

@@ -0,0 +1,26 @@
+#!/bin/sh
+#
+# $NetBSD: downinterfaces,v 1.1 2001/09/04 18:09:14 martin Exp $
+#
+
+# KEYWORD: shutdown
+
+if [ $1 != "stop" ]; then exit 0; fi
+
+. /etc/rc.conf
+
+tmp=`ifconfig -lu`
+iflist=""
+for int in $tmp; do
+	case $int in
+	pppoe*)	iflist="$iflist $int"
+		;;
+	esac
+done
+iflist="$iflist $force_down_interfaces"
+if [ "$iflist" = "" ] || [ "$iflist" = " " ]; then exit 0; fi
+
+echo "Shutting down interfaces:$iflist"
+for int in $iflist; do
+	ifconfig $int down
+done