plc.d/network

   1 #!/bin/bash
   2 #
   3 # priority: 100
   4 #
   5 # Manage network related configuration files
   6 #
   7 # Mark Huang <mlhuang@cs.princeton.edu>
   8 # Copyright (C) 2006 The Trustees of Princeton University
   9 #
  10 # $Id$
  11 #
  12
  13 # Source function library and configuration
  14 . /etc/plc.d/functions
  15 . /etc/planetlab/plc_config
  16
  17 # Be verbose
  18 set -x
  19
  20 case "$1" in
  21     start)
  22         MESSAGE=$"Generating network files"
  23         dialog "$MESSAGE"
  24
  25         mv -f /etc/hosts /etc/hosts_plc.backup
  26         hfile=$(mktemp)
  27         # Minimal /etc/hosts
  28         (
  29             for server in DB API BOOT WWW ; do
  30                 hostname=PLC_${server}_HOST
  31                 ip=PLC_${server}_IP
  32                 if [ -n "${!ip}" ] ; then
  33                     echo "${!ip}        ${!hostname}"
  34                 else
  35                     ip=$(gethostbyname ${!hostname})
  36                     if [ -n "$ip" ] ; then
  37                         echo "$ip       ${!hostname}"
  38                     fi
  39                 fi
  40             done
  41         ) > $hfile
  42         grep -v "^#" /etc/hosts >> $hfile
  43         echo "#generated by /etc/plc.d/network" >/etc/hosts
  44         echo "127.0.0.1 localhost.localdomain localhost" >> $hfile
  45         sort -u $hfile >> /etc/hosts
  46         chmod +r /etc/hosts
  47         rm -f $hfile
  48
  49         result "$MESSAGE"
  50         ;;
  51
  52     stop)
  53         MESSAGE=$"Reverting network files"
  54         if [ -f /etc/hosts_plc.backup ] ; then
  55             mv -f /etc/hosts_plc.backup /etc/hosts
  56         fi
  57         result "$MESSAGE"
  58         ;;
  59 esac
  60
  61 exit $ERRORS