#!/bin/bash
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# 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.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2007 Vyatta, Inc.
# All Rights Reserved.
#
# Author:	Bob Gilligan <gilligan@vyatta.com>
# Description:	Standalone script to reset the root passwd to factory default
#		value.  Note:  This script can ONLY be run as a standalone
#		init program by grub.
#
# **** End License ****

# The Vyatta config file:
CF=/opt/vyatta/etc/config/config.boot

echo "Standalone root password recovery tool."
echo
#
# Check to see if we are running in standalone mode.  We'll
# know that we are if our pid is 1.
#
if [ "$$" != "1" ]; then
    echo "This tool can only be run in standalone mode."
    exit 1
fi

#
# OK, now we know we are running in standalone mode.  Talk to the
# user.
#
echo "Do you wish to reset the root password"
echo -n "to the original default value (vyatta)? (Yes/No) [No]: "
read response
response=${response:0:1}

if [ "$response" != "y" -a "$response" != "Y" ]; then
    echo "OK, the root password will not be reset."
    echo -n "Rebooting in 5 seconds..."
    sleep 5
    echo
    /sbin/reboot -f
fi


echo "Starting process to reset the root password..."

echo "Re-mounting root filesystem read/write..."
mount -o remount,rw /

# Leftover from V3.0
if grep -q /opt/vyatta/etc/config /etc/fstab
then 
    echo "Mounting the config filesystem..."
    mount /opt/vyatta/etc/config/
fi

echo "Saving backup copy of config.boot..."
cp $CF ${CF}.before_pwrecovery

echo "Reseting the root password..."

# change system first
newpwd=`mkpasswd -H md5 vyatta`
usermod --password "$newpwd" root

# escape / in encrypted passwd
pw=$(echo $newpwd | sed 's:/:\\/:g')
sed -i \
    -e "/^.* user root {/,/}/s/encrypted-password .*\$/encrypted-password \"$pw\"/" \
    $CF

echo $(date "+%b%e %T") $(hostname) "Root password reset to factory value" \
    | tee -a /var/log/auth.log  >>/var/log/messages

sync

echo "System will reboot in 10 seconds..."
sleep 10
/sbin/reboot -f