#!/bin/sh
typeset -i timer=120  #This sets the time limit on ISP
while [ 1 ]
do
if pidof pppd > /dev/null  # Checks whether ppp is running or not
  then
   echo  System message: pppd daemon running
   echo  ${timer} minutes left until the timeout #Print out time left.
   timer=$(( timer-1 ))
   sleep 60
  else
   echo System message: pppd not running, starting now
  wvdial /etc/wvdial.conf & # Start ppp with wvdial
  sleep 30
  plog | grep IP > ~/iplog  #Get the new IP address
  mail your_email_address < ~/iplog  #Email it to your account.
   typeset -i timer=120
   echo System message. Process pppd started, $timer minutes until timeout
fi

done