1#!/bin/sh
2#
3# Copyright (C) 2018 The Android Open Source Project
4#
5# Licensed under the Apache License, Version 2.0 (the "License");
6# you may not use this file except in compliance with the License.
7# You may obtain a copy of the License at
8#
9#      http://www.apache.org/licenses/LICENSE-2.0
10#
11# Unless required by applicable law or agreed to in writing, software
12# distributed under the License is distributed on an "AS IS" BASIS,
13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14# See the License for the specific language governing permissions and
15# limitations under the License.
16#
17
18chroot_sanity_check() {
19  if [ ! -f /var/log/bootstrap.log ]; then
20    echo "Do not run this script directly!"
21    echo "This is supposed to be run from inside a debootstrap chroot!"
22    echo "Aborting."
23    exit 1
24  fi
25}
26
27chroot_cleanup() {
28  # Read-only root breaks booting via init
29  cat >/etc/fstab << EOF
30tmpfs /tmp     tmpfs defaults 0 0
31tmpfs /var/log tmpfs defaults 0 0
32tmpfs /var/tmp tmpfs defaults 0 0
33EOF
34
35  # systemd will attempt to re-create this symlink if it does not exist,
36  # which fails if it is booting from a read-only root filesystem (which
37  # is normally the case). The syslink must be relative, not absolute,
38  # and it must point to /proc/self/mounts, not /proc/mounts.
39  ln -sf ../proc/self/mounts /etc/mtab
40
41  # Remove contaminants coming from the debootstrap process
42  echo vm >/etc/hostname
43  echo "nameserver 127.0.0.1" >/etc/resolv.conf
44
45  # Put the helper net_test.sh script into place
46  mv /root/net_test.sh /sbin/net_test.sh
47
48  # Make sure the /host mountpoint exists for net_test.sh
49  mkdir /host
50
51  # Disable the root password
52  passwd -d root
53
54  # Clean up any junk created by the imaging process
55  rm -rf /var/lib/apt/lists/* /var/log/bootstrap.log /root/* /tmp/*
56  find /var/log -type f -exec rm -f '{}' ';'
57}
58