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From: Doug Barton <dougb@FreeBSD.org>
Date: Sun, 23 Aug 2009 19:52:47 +0000 (UTC)
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Subject: svn commit: r196478 - head/etc
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Author: dougb
Date: Sun Aug 23 19:52:47 2009
New Revision: 196478
URL: http://svn.freebsd.org/changeset/base/196478

Log:
  Prior to the dire warning about values of network_interfaces other than
  AUTO the biggest mistake users made was leaving lo0 off the list. Since
  lo0 is effectively mandatory, check for it and add it to the list if
  it's not there.

Modified:
  head/etc/network.subr

Modified: head/etc/network.subr
==============================================================================
--- head/etc/network.subr	Sun Aug 23 18:28:58 2009	(r196477)
+++ head/etc/network.subr	Sun Aug 23 19:52:47 2009	(r196478)
@@ -727,6 +727,13 @@ list_net_interfaces()
 		;;
 	*)
 		_tmplist="${network_interfaces} ${cloned_interfaces}"
+
+		# lo0 is effectively mandatory, so help prevent foot-shooting
+		#
+		case "$_tmplist" in
+		lo0*|*lo0|*' lo0 '*)	;;	# This is fine, do nothing
+		*)	_tmplist="lo0 ${_tmplist}" ;;
+		esac
 		;;
 	esac