From b8ebaa9c78a78e3e3c4043a20d3c84cac9ca7fd1 Mon Sep 17 00:00:00 2001
From: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Date: Fri, 23 Jan 2015 16:03:13 +0000
Subject: [PATCH] Gentoo template - Add a hwaddr if there is only one veth
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Reuse the code from the Debian template to associate a hwaddr if there
is only one veth interface in the container's config file.

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
---
 templates/lxc-gentoo.in | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/templates/lxc-gentoo.in b/templates/lxc-gentoo.in
index d0df8999f..92edcd4c4 100644
--- a/templates/lxc-gentoo.in
+++ b/templates/lxc-gentoo.in
@@ -681,6 +681,13 @@ container_conf()
     #at this point if there
     conf_file="${path}/config"
 
+    # if there is exactly one veth network entry, make sure it has an
+    # associated hwaddr.
+    nics=`grep -e '^lxc\.network\.type[ \t]*=[ \t]*veth' ${conf_file} | wc -l`
+    if [ $nics -eq 1 ]; then
+        grep -q "^lxc.network.hwaddr" ${conf_file} || sed -i -e "/^lxc\.network\.type[ \t]*=[ \t]*veth/a lxc.network.hwaddr = 00:16:3e:$(openssl rand -hex 3| sed 's/\(..\)/\1:/g; s/.$//')" ${conf_file}
+    fi
+
     if grep -q "^lxc.rootfs" "${conf_file}" ; then
         #lxc-create already provided one
         conf_rootfs_line=""