#!/bin/sh
# (c) Copyright 2002, 2003, 2005 Stichting Wireless Leiden, all
#     rights reserved. More information can be found on
#     http://wwww.wirelessleiden.nl and the license is at:
#     http://wleiden.webweaving.org:8080/svn/node-config/LICENSE
#
# Marten Vijn 24-03-03
# new version 14-11-2003 
# If there is a global system configuration file, suck it in.
#

PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
TMPDIR=${TMPDIR:-/tmp}
TMPPREFIX=${TMPDIR}/wl-tmp-$$
WHOST=${WHOST:-rambo.wleiden.net}
HTTP_PROXY=${HTTP_PROXY:-http://proxy.wleiden.net:3128}
HTTP_USER_AGENT=${HTTP_USER_AGENT:-curl.faked.fetch/0.0}
VERSION=1.00
QUIET=${QUIET:-}

if [ ${QUIET} ]; then
  echo "Using..."
  echo "no proxy"
  echo "no dhclient"
  echo "config `hostname -s`"
  sleep 1
fi

echo "do we need a proxy ?"
echo
echo "just hit enter to go on without proxy settings"
echo "otherwise type y for this proxy ${HTTP_PROXY} or enter your own proxy"
echo "if don't want a proxy enter n "

if [ -z  ${QUIET} ]; then
  read proxyset
else
  proxyset="n"
fi

case $proxyset in
 
n)  
echo no proxy is set
    ;;
y) 
    echo this the proxy ${HTTP_PROXY}
    export HTTP_PROXY
    ;;

*)
    ${HTTP_PROXY}=${proxyset}
    echo this the proxy $HTTP_PROXY
    export HTTP_PROXY
    ;;
esac

export HTTP_USER_AGENT
export TMPDIR

# Genesis master location.
link=${GENESIS:-http://${WHOST}/cgi-bin/g_list.pl/}
list=filelist

# Location for private config
lcd=${LCDIR:-/lcd}

# Make sure we clean up our mess when needed.
trap "rm -f ${TMPPREFIX}.?; echo Failed; exit 1;" 2 3

# connection test function
connset()
{

if [ `ps ax | grep -c dhclient` != "1" ] ; then
        killall dhclient
fi
  

echo "enter the ipadress to resolv dns" 
echo 1 for cope as dns on wirelessleiden
echo 2 for xs4all dns server 
echo 3 if you are at LCPL
echo or type your on dns

read dns_list

case $dns_list in 
1) 
  resolver="172.17.8.1"
    ;;
2)   
  resolver="194.109.9.99"
    ;;
3)
  resolver="10.0.0.1"
    ;;
*)
  resolver=$dns_list 
  ;;
esac


echo "/etc/resolv.conf has been changed from:"
echo `cat /etc/resolv.conf`
echo to
echo $resolver
echo "nameserver ${resolver}" > /etc/resolv.conf

for nic in `ifconfig -l`
do
case ${nic} in
  lo0) 
    echo   
    ;;
  wi*)
    echo
    ;;
  *) 
  if ping -qnoc ${WHOST}; then
    echo Connection on interface ${nic} ok
  else
    killall dhclient
    echo Trying to get a DHCP lease on ${nic}
    dhclient -1 ${nic}
  fi
  ;; 
  esac
done
}

echo "do we need network on a nic by dhcp ?"
echo "enter n to not use dhclient for configuration ! "

if [ -z ${QUIET} ]; then
  read nic_dhcp
else
  nic_dhcp="n"
fi
if [ "x${nic_dhcp}" = "xn" ] ; then 
  echo proceding...
  else 
  echo running dhclient
  connset
fi
# Logging function
#
log()
{
  echo $*
}

cleanse()
{
  rm -f ${TMPPREFIX}.?
}

# Normal exit; but make sure
# we also clean up any tmp files
#
cleanexit()
{
  E=1
  if [ $# -gt 0 ]; then
    E=$1
  fi
  cleanse
  log Exit
  exit $E
  # Trap any weird exit codes.
  exit 1
}

safefetch() 
{
  url=$1
  file=$2
  fetch -q -o - ${link}${nodename} > ${TMPPREFIX}.x \
    || cleanexit 1
  cp ${TMPPREFIX}.x ${dir}/${list} \
    || cleanexit 1
  rm -f ${TMPPREFIX}.x

  return 0
}

getvalidnodename()
{
log  " "
log  " "
log  " "
log  Fetching list of nodes from ${link}

fetch -q -o - ${link} > ${nlist} || cleanexit 1

while ! grep -q "^${nodename}\$" ${nlist}
do
  echo Nodes:
  cat ${nlist}
  echo
  echo -n enter nodename \[default: ${default}\]:
  if [ -z ${QUIET} ]; then  
    read nodename
  else
    nodename=${default}
  fi

  if [ "x${nodename}" = "x" ]; then
    nodename=${default}
  fi
done

echo Node Selected: ${nodename}
}


do_diff() {
  diff -uwbB ${symdir}/${i} ${dir}/${i}.new
}


do_move() {
if [ -e ${dir}/${i}.bak ]; then
  rm ${dir}/${i}.bak
fi

if [ -e ${dir}/${i} ]; then
  mv ${dir}/${i} ${dir}/${i}.bak || cleanexit 1
  log backup ${dir}/${i} to ${dir}/${i}.bak
fi

mv ${dir}/${i}.new ${dir}/${i} || cleanexit 1
  log updated ${dir}/${i}
}

bink() {
  $CMD
}

dir=${lcd}

echo Config Node -- Version: $VERSION

#check config dir
#
if  [ ! -d ${dir}  ]; then 
  mkdir -p ${dir} || cleanexit 1
fi

if [ -z ${HTTP_PROXY} ]; then
  # checking connection - and only fiddle
  # with interfaces if we need to.
  #
  (
    echo no proxy defined - checking connection.
    host ${WHOST} > /dev/null || exit 1
    ping -qnoc 1 ${WHOST} > /dev/null || exit 1
    exit 0
  ) || connset
fi

CMD=do_move
if [ "x$1" = "x-d" ]; then
  CMD=do_diff
  dir=${TMPDIR}
  shift
fi

# Use the cmd line argument, of any
#
if [ $# = 1 ]; then
  nodename=$1
else
  if [ -r ${lcd}/myname ]; then
    default=`cat ${lcd}/myname`
  else
    default=`hostname -s`
    test -z $default && default=none
  fi
fi

nlist=${TMPPREFIX}.l

test -z $default && default=$nodename

test -z $nodename && getvalidnodename

log Fetching file list from $link for $nodename

safefetch ${link}${nodename} ${dir}/${list}  

for i in `cat ${dir}/${list}`
do
  log getting ${i} for ${nodename} from ${link}
  fetch -q -o - ${link}${nodename}/${i} > ${dir}/${i}.new \
    || cleanexit 1
done


for i in  `cat ${dir}/${list}`
do
  case $i in
  txtconfig|rc.local|rc.node.local|snmpd.local.conf|resolv.conf|dhcpd.conf|named.conf)
  bink
    ;;
  *)
    echo Script cannot cope with ${i} - ignoring..
    ;;
  esac
done


if [ -e /etc/rc.local ]; then
  # See if we are in rc.local
  if grep -q /config-node.sh /etc/rc.local; then

    echo As this node now has real configs - do enter a root password
    echo
    passwd \
      || cleanexit 1

    echo Removing /etc/rc.local
    rm -f /etc/rc.local
  
    echo Will drop write perms on the next reboot.
  fi
fi

# Record our name.
echo ${nodename} > ${dir}/myname

# Rebuild reverse lookups
H=`cat /etc/rc.node.local | grep hostname | sed -e s/hostname=// | sed -e s/[\"\']//g`
hostname $H
if [ -r  /etc/namedb/make-localhost ]; then
  (
    cd /etc/namedb || exit 1
    sh /etc/namedb/make-localhost || exit 1
  ) || exit 1
fi

cleanse

if [ -e /etc/rc.empty.conf ] ; then
  rm /etc/rc.empty.conf || exit
  echo removed /etc/rc.empty.conf - and rebooting in 30 seconds \(or press ctrl-C to abort\)
  read -t 30 DUMMY
  reboot
fi

exit 0