#!/usr/bin/env sh

# chroot.sh
# This file is a first-stage payload to shrx.
# 
# Copyright (C) 2019 Stack41, LLC.
# 
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

apk update
apk upgrade
apk add bash

# Trash leftover 
rm /etc/resolv.conf

# Clear APK repos. Child projects should set these themselves.
echo "" > /etc/apk/repositories

# Start payload script at first boot
ct="/etc/crontabs/root"
echo "@reboot mkdir -p /mnt/vdb1 && mount /dev/vdb1 /mnt/vdb1 && /usr/bin/env bash -e -x /mnt/vdb1/main.sh 2>/dev/ttyS0 >/dev/ttyS0 && sed -i '/uakGGwa2BLoG3s5SzUY/d' $ct && poweroff" >> $ct

# Remove local logins
cat > /etc/inittab <<EOF
# /etc/inittab
::sysinit:/sbin/openrc sysinit
::sysinit:/sbin/openrc boot
::wait:/sbin/openrc default
# Stuff to do for the 3-finger salute
::ctrlaltdel:/sbin/reboot
# Stuff to do before rebooting
::shutdown:/sbin/openrc shutdown
EOF

# Set root password to garbage
echo "root:$(head -c 512 /dev/urandom | base64 | tr -d '\n')" | chpasswd