#!/bin/bash
#
###########################################################################################
#                                 EHU  ( /etc/hosts updater ) v0.2                        #
#                                   code (C) 1999 by rofus                                #
#                                      rofus@mindless.com                                 #
# WHAT IS:                                                                                #
# This simple ip-{up-down} script update at every connection (when the ppp daemon starts  #
# and when is closed) your etc/hosts file with your actual REAL ip and hostname (useful in#
# some cases).                                                                            #
# USAGE:                                                                                  #
# FIRST of all, you must create a copy of your original /etc/hosts in /etc/hosts.backdark #
# This program will read from your original etc/hosts.backdark (IT NEVER WILL BE MODIFIED)# 
# and add to the new /etc/hosts any lines not commented that you added previously (ie IP  #
# and hostnames of the machines on your LAN etc.. ).                                      #
# Put this file (ip-up) and the ip-down in your etc/ppp/ directory, and make sure         #
# they have permission x for the user(s) that starts the pppd.                            #
# For any problem/suggestion please email me.                                             #
#											  #
# NOTE NOTE NOTE: if you want add new voices at /etc/hosts, YOU MUST ADD them to the      #
#                 **/etc/hosts.backdark** file, because the scripts recreate everytime    #
#		  a NEW and UPDATED /etc/hosts; so if you add new voices to the		  #
#		  /etc/hosts.backdark the next time the scripts create a new and	  #
#		  updated file /etc/hosts also with your new updates.			  #
#											  #
#                                                                                         #
# Thanks to Stevenson! and all on IRCnet #linux-it                                        #
#											  #
###########################################################################################  

		ehu () {
		echo 127.0.0.1 localhost > /etc/hosts 
		ehu1=$(hostname -i)
                ehu2=$(hostname)
		ehu3=$(hostname -d)
		echo $ehu1 $ehu2.$ehu3 >> /etc/hosts 
		egrep -E -v ^#\|^127.0.0.1 /etc/hosts.backdark >> /etc/hosts		
		hostname $ehu2.$ehu3
		}
	if [ -e "/etc/hosts.backdark" ]
	then
		ehu
	else
# If the script can't find /etc/hosts.backdark it simply
# copy the /etc/hosts and create the file.
		cp /etc/hosts /etc/hosts.backdark
		ehu
	fi