From 2ef0c19e3ebfd99c1c89bf13dee0ec198c5ef559 Mon Sep 17 00:00:00 2001
From: Patrick J. Volkerding <volkerdi@slackware.com>
Date: Wed, 10 Nov 2021 16:22:43 -0600
Subject: [PATCH] Skip bridge and bond configuration in LXC container

Add LXC detection at the beginning of the script to set container="lxc" if an
LXC container is detected. Later, use this to skip bridge and bond creation in
an LXC container. Patched script works in both LXC and on bare metal.

--- ./etc/rc.d/rc.inet1.new.orig	2021-03-08 18:13:50.484386646 -0600
+++ ./etc/rc.d/rc.inet1.new	2021-11-10 02:32:58.780223136 -0600
@@ -2,7 +2,14 @@
 # /etc/rc.d/rc.inet1
 # This script is used to bring up the various network interfaces.
 #
-# @(#)/etc/rc.d/rc.inet1 10.2  Sun Jul 24 12:45:56 PDT 2005  (pjv)
+# @(#)/etc/rc.d/rc.inet1 15.0  Wed Nov 10 08:17:22 UTC 2021  (pjv)
+
+# If we are in an lxc container, set $container to skip parts of the script.
+# Thanks to Matteo Bernardini <ponce@slackbuilds.org> and Chris Willing for
+# the initial work making this script lxc compatible.
+if grep -aq container=lxc /proc/1/environ 2> /dev/null ; then
+  container="lxc"
+fi
 
 ############################
 # READ NETWORK CONFIG FILE #
@@ -254,9 +261,9 @@
   # bond or bridge, configure the interfaces with IPs of 0.0.0.0 and set the
   # MAC address with HWADDR.  Then, finally, define the bond or bridge.
   # If the interface is a bond, create it.
-  [ -n "${BONDNICS[$i]}" ] && bond_create $i
+  [ -n "${BONDNICS[$i]}" -a -z "$container" ] && bond_create $i
   # If the interface is a bridge, create it.
-  [ -n "${BRNICS[$i]}" ] && br_open $i
+  [ -n "${BRNICS[$i]}" -a -z "$container" ] && br_open $i
   if [ -e /sys/class/net/${1%%[:.]*} ]; then # interface exists
     if ! /sbin/ip address show scope global dev ${1} 2>/dev/null | grep -Ewq '(inet|inet6)' || \
         ! /sbin/ip link show dev ${1} | grep -wq "state UP"; then # interface not up or not configured