source: genesis/tools/config-node.sh@ 4996

#!/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
#
# 1.00 
# ??    Marten Vijn 24-03-03
# ??    new version 14-11-2003 
# 1.03  proxy cleanup, detect faulty files, generalize
#       file list, check node name to be valid, '-n' mode.
#       make moving of final files a bit safer. (dirkx)
# 1.04  Add auto read-only detection. (dirkx)
# 1.05  Cope with WHOST containing a port number. (dirkx).
#
# 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=${WHOST:-rambo.wleiden.net}
HTTP_PROXY_DEFAULT=${HTTP_PROXY:-http://proxy.wleiden.net:3128}
HTTP_USER_AGENT=${HTTP_USER_AGENT:-curl.faked.fetch/0.0}
VERSION=1.05
QUIET=${QUIET:-}
PRETEND=no
FORCE=no
CMD=do_move

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

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

FETCH=${FETCH:-/usr/bin/fetch}
test -e ${FETCH} || FETCH="curl"

if echo ${FETCH} | grep -q curl; then
        FETCH="${FETCH} --silent"
else
        FETCH="${FETCH} -q"
fi

usage() {
        echo Usage $0 [-q] [-p proxy] [-d] [-D] [-n] [hostname]
        echo "-p <proxy>        Set a proxy"
        echo "-P                Use ${HTTP_PROXY_DEFAULT} as a proxy"
        echo "-D                Use DHCP to get an address"
        echo "-n                Show what would happen - but do not do it"
        echo "-d                Diff met hudiige config (maar doe niets)"
        echo "-q                Suppress all output and user interaction"
        echo "-F                Force disk to write"
        exit 1
}

for i in $*
do
        case "$i"
        in
                -D)     connset || exit 1
                        ;;
                -q)
                        QUIET=yes
                        ;;
                -d)     
                        CMD=do_diff
                        dir=${TMPDIR}
                        ;;
                -p)
                        shift;
                        HTTP_PROXY=$1
                        export HTTP_PROXY
                        ;;
                -p)
                        HTTP_PROXY=HTTP_PROXY_DEFAULT
                        export HTTP_PROXY
                        ;;
                -n)
                        PRETEND=yes
                        ;;
                -F)
                        FORCE=yes
                        ;;
                *)
                        test $# -eq 1 || usage
                        nodename=$i
                        break;
                        ;;
        esac
        shift
done


HOST=`echo ${WHOST} | sed -e 's/:.*//'`

# connection test function
connset()
{
        if [ `ps ax | grep -c dhclient` != "1" ] ; then
                killall dhclient
        fi
  
        echo "Enter an IP address of a nearby Nameserver or use:"
        echo "  1 to use COPE \(on Wleiden\)"
        echo "  2 to use XS4All  \(on the internet\)"
        echo "  3 to use the LCP server \(on the internal LCP networ\)"

        echo -n "IP address or 1/2/3: "
        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

        cp /etc/resolv.conf /etc/resolv.bak || exit 1
        echo "nameserver ${resolver}" > /etc/resolv.conf


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

log()
{
        if [ -z ${QUIET} ]; then  
                echo "$*"
        fi
}
lognlr()
{
        if [ -z ${QUIET} ]; then  
                echo -n "$*"
        fi
}

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} -o - ${link}${nodename} > ${TMPPREFIX}.x \
                    || cleanexit 1

        # Genesis can provide us with corrupted/empty files
        # with a 200 OK - so insist that they are at least
        # a few lines long.
        #
        set `wc -l ${TMPPREFIX}.x`
        if [ $1 -lt 2 ]; then
                echo File ${link}${nodename} is less than 2 lines long.
                echo Assuming a problem with Genesis.
                cleanexit 2
        fi

        cp ${TMPPREFIX}.x ${dir}/${list} \
            || cleanexit 1
        rm -f ${TMPPREFIX}.x

        return 0
}

getvalidnodenames()
{
        log Fetching list of nodes from ${link}
        ${FETCH} -o - ${link} > ${nlist} || cleanexit 1
}

getvalidnodename()
{
while ! grep -q "^${nodename}\$" ${nlist}
do
  echo Nodes:
  if [ -x /usr/bin/column ]; then
        column  ${nlist}
  else
        cat ${nlist}
  fi
  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() {
        if test -e $1; then
                diff -uwbB $1 $1.new
        else
                echo Warning: $1 does not yet exist - no DIFF
        fi
}

do_move() {
if [ -e $1 ]; then
        mv $1 $1.bak  || cleanexit 1
fi
cp $1.new $1 || cleanexit 1
rm $1.new || cleanexit 1
}

linkin() {
  symdir=$1
  file=$2

  if [ ${PRETEND} = 'yes' ]; then
        echo "** $CMD $*"
   else
        $CMD $dir/$file || exit 1
   fi

   test -e $symdir/$file || (
                echo WARNING: Symlink $symdir/$file not in place.
                echo use:   ln -s $dir/$file $symdir/$file  
                echo to fix if appropriate.
        )
}

log Config Node -- Version: $VERSION '$Rev: 4990 $'

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

if [ ${PRETEND} != 'yes' ]; then
        if mount | grep "on / " | grep -q read-only; then
                if [ ${FORCE} = "yes" ]; then
                        echo Forcing read-only disk into rw.
                        fsck / || exit 2
                        mount -o noatime -u -w / || exit 2 || exit 1
                        trap "mount -u -r /; rm -f ${TMPPREFIX}.?; echo Failed; exit 1;" 2 3
                        FORCE=rw
                else
                        echo ERROR - disk / is mounted read only. Aborting.
                        exit 1
                fi
        fi
fi

export HTTP_USER_AGENT
export TMPDIR


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

if [ -z ${HTTP_PROXY} ]; then
        (
                log Checking DNS for ${HOST}
                host ${HOST} > /dev/null || exit 1
                log Checking if ${HOST} can be reached
                ping -qnoc 1 ${HOST} > /dev/null || exit 1
                log Connection OK
                exit 0
        ) || connset
else
        log Connection not checked because there is an http proxy configured: ${HTTP_PROXY}.
fi

if [ -r ${lcd}/myname ]; then
    default=`cat ${lcd}/myname`
else
    default=`hostname -s`
    test -z $default && default=none
fi

if [ ! -z ${QUIET} ]; then
        if [ -z ${nodename} ]; then
                nodename=${default}
        fi
fi


nlist=${TMPPREFIX}.l

test -z $default && default=$nodename

getvalidnodenames || exit 1

test -z $nodename && getvalidnodename

while test -z $nodename || ! grep -q ${nodename} ${nlist}
do
        echo
        echo Error: Node named \"$nodename\" not known.
        if [ -z ${QUIET} ]; then  
                exit 1
        fi
        echo Please select one from the list.
        echo
        getvalidnodename
done

log Fetching file list from $link for $nodename

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

lognlr "Fetching:"
for i in `cat ${dir}/${list}`
do
  lognlr " ${i}"
  $FETCH -o - ${link}${nodename}/${i} > ${dir}/${i}.new \
    || cleanexit 1
done
log .

for i in  `cat ${dir}/${list}`
do
        case ${i} in
        linux.sh | config | txtconfig ) 
                # log obsolete file: ${i} - skipped
                ;; 
        resolv.conf | rc.node.local | rc.local)
                linkin /etc ${i}
                ;;
        snmpd.local.conf)
                linkin /usr/local/share/snmp ${i}
                ;;
        named.conf)
                linkin /etc/namedb ${i}
                ;;
        dhcpd.conf)
                linkin /usr/local/etc ${i}
                ;;
        zebra.conf | ospfd.conf)
                linkin /usr/local/etc/zebra ${i}
                ;;
        authorized_keys)
                linkin /root/.ssh ${i}
                ;;
        ssh_known_hosts)
                linkin /etc/ssh ${i}
                ;;
        daemons.sh)
                linkin /wl ${i}
                ;;
        *)
                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
if test -e /etc/rc.node.local; then
        H=`cat /etc/rc.node.local | grep hostname | sed -e s/hostname=// | sed -e s/[\"\']//g`
        hostname $H
else
        echo Warning: rc.node.local missing.
fi

if [ -r  /etc/namedb/make-localhost ]; then
  (
    cd /etc/namedb || exit 1
    sh /etc/namedb/make-localhost || exit 1
  ) || exit 1
fi

cleanse || exit 1

if [ -e /etc/rc.empty.conf ] ; then
        rm /etc/rc.empty.conf || exit 1
        echo removed /etc/rc.empty.conf - and rebooting in 30 seconds \(or press ctrl-C to abort\)
        read -t 30 DUMMY
        reboot
fi

test ${FORCE} = 'rw' && mount -u -r /
exit 0