From 0706287ab500d02db0257d2321156da6f01a38a6 Mon Sep 17 00:00:00 2001
From: Brett Parker <iDunno@sommitrealweird.co.uk>
Date: Sat, 21 May 2016 23:55:28 +0100
Subject: [PATCH] Clean up after ourselves, and stop services from doing
 anything in the chroot as we're creating it

---
 templates/lxc-debian-unprivileged | 38 ++++++++++++++++++++-----------
 1 file changed, 25 insertions(+), 13 deletions(-)

diff --git a/templates/lxc-debian-unprivileged b/templates/lxc-debian-unprivileged
index 3311609..c7134a7 100755
--- a/templates/lxc-debian-unprivileged
+++ b/templates/lxc-debian-unprivileged
@@ -66,6 +66,21 @@ eval set -- "$options"
 DEBIAN_MIRROR="http://mirror.mythic-beasts.com/debian/"
 DEBIAN_RELEASE="jessie"
 
+disable_initscripts() {
+    cat <<EOF > ${LXC_ROOTFS}/usr/sbin/policy-rc.d
+#!/bin/sh
+
+exit 101
+EOF
+    chmod 755 ${LXC_ROOTFS}/usr/sbin/policy-rc.d
+}
+
+enable_initscripts() {
+    if [ -e ${LXC_ROOTFS}/usr/sbin/policy-rc.d ]; then
+        rm ${LXC_ROOTFS}/usr/sbin/policy-rc.d
+    fi
+}
+
 while :; do
     case "$1" in
         -h|--help)      usage && exit 1;;
@@ -80,12 +95,6 @@ while :; do
     esac
 done
 
-echo "Mapped UID: $MAPPED_UID"
-echo "Mapped GID: $MAPPED_GID"
-echo "RootFS: $LXC_ROOTFS"
-echo "Name: $LXC_NAME"
-echo "Path: $LXC_PATH"
-
 # rewrite the default config file
 
 sed -i -e "/lxc./{w ${LXC_PATH}/config-auto" -e "d}" ${LXC_PATH}/config
@@ -140,7 +149,7 @@ for file in /var/lib/lxcfs/proc/*; do
     mount -n -o bind $file ${LXC_ROOTFS}/proc/$fname
 done
 
-for dev in random urandom; do
+for dev in null random urandom; do
     touch ${LXC_ROOTFS}/dev/$dev
     mount -n -o bind /dev/$dev ${LXC_ROOTFS}/dev/$dev
 done
@@ -149,15 +158,14 @@ done
 echo "debootstrapping - hahaha" > ${LXC_ROOTFS}/proc/cmdline
 
 # and disable initscripts
-cat <<EOF > ${LXC_ROOTFS}/usr/sbin/policy-rc.d
-#!/bin/sh
-
-exit 101
-EOF
+disable_initscripts
 
 # and run the second stage
 chroot ${LXC_ROOTFS} /debootstrap/debootstrap --second-stage
 
+# make sure that initscripts are still disabled
+disable_initscripts
+
 # configure locales
 lang=en_GB.UTF-8
 enc=UTF-8
@@ -228,7 +236,7 @@ chroot ${LXC_ROOTFS} apt-get -y upgrade
 [ -e ${LXC_ROOTFS}/usr/sbin/policy-rc.d ] && rm ${LXC_ROOTFS}/usr/sbin/policy-rc.d
 rm ${LXC_ROOTFS}/proc/cmdline
 
-for dev in random urandom; do
+for dev in null random urandom; do
     umount ${LXC_ROOTFS}/dev/$dev
     rm ${LXC_ROOTFS}/dev/$dev
 done
@@ -239,4 +247,8 @@ for file in /var/lib/lxcfs/proc/*; do
     rm ${LXC_ROOTFS}/proc/$fname
 done
 
+enable_initscripts
+
+rm -r ${LXC_PATH}/bin
+
 exit 0
-- 
2.39.5