#!/bin/bash
# this is the code that is to be used for the LAB1
echo welcome to LAB1
###################################################################################
#######                            SCRIPTM4          ##############################
###################################################################################
### This script extracts the correponding ip for the student home machine from the 
## database file and mounts the appropriate home directory from  the "home machine"
###################################################################################
#### CREATED BY FAHAD SAEED 


ifup ath0
 
bash /home/script/testlogin

mylogin=`cat login`
echo $mylogin 
#login-name is stored in file named login
# variable for storing the login is mylogin



#The login and the appropriate ip are read from the database
#the appropriate line from the database is stored in the file named ippluslog

grep -f login database>ippluslog
#the following command stores the login name and ip address
#on two seperate lines and isolates ip address in a seperate file named ip

sed 's/[ ][ ]*/\
/g' ippluslog>ippluslog2

#isolating ip
comm -23 ippluslog2 login>studentip

# now the ip address to which the terminal has to connect is $myip

read myip<studentip
echo $myip		

## Assuming that the backup for each account is on (HOMEACCNT IP +1)
##This is ip1 in the /home/admin

perl /home/script/back
read backupip</home/script/backupip

# This will ssh to the home machine of the student sitting on this terminal
# AND if the first ssh fails (the home machine is down) then ssh to the 
#backup machine 

(ssh $mylogin@$myip)||(ssh $mylogin@$backupip)

# .bash_profile of the remote home account contains

# bash /home/script1/remote1
# exit

#this script(remote1) will make sure that the home folders from the home machine 
#are exported to this terminal 		
#after this the ssh exits

#Now the /etc/exports of the remote home machine contains the ip of this machine 
#and will allow this machine to mount the appropriate home directory
read localip < /home/auto/terminalip

((ssh root@$localip "mount -t nfs $myip:/home/$mylogin /home/localwork")||(ssh root@$localip "mount -t nfs $backupip:/home/$mylogin /home/localwork")) &
#waits until the last job in the background is executed
wait $!			

cd /home/localwork
konsole 
Now the student can WORK!!