#!/bin/bash
while true ; do?

#
#  Sleep while the file if_block exists
#  because someone else is running this script
#

while [ -f /var/www/uNode/ram/if_block ] ; do?
 usleep 500000?
done?

#
#  when if_block is gone then we are clear to run this script
#  to keep anyone else from running this script while we are using it
#  make a file called if_block
#


touch /var/www/uNode/ram/if_block?


#
#  Is there a file called /etc/network/interfaces and does it contain the word IF_WIFI
#  when the wifi client is active but not necessairly connected?
#

if (cat "/etc/network/interfaces" | grep 'IF_WIFI' > /dev/null 2>&1) ; then?
 #echo "WIFI ACTIVE"?

#
# is there a command called iwconfig  and does it return words that include ESSID
# when the wifi is connected??
#


 if(iwconfig 2>&1 | grep ESSID > /dev/null 2>&1) ; then?
  #echo "WIFI IS CONNECTED"?

#
#  Is there a file called /var/www/uNode/ram/if_reset 
#  if there is such a file then the original script removes the file
#


  if [ -f /var/www/uNode/ram/if_reset ] ; then?
   rm /var/www/uNode/ram/if_reset?


#
#  Is there a file called /var/www/uNode/data/vpn_active 
#  if there is such a file then restart the vpn
#


   if [ -f /var/www/uNode/data/vpn_active ] ; then?
    #echo "VPN IS ACTIVE - RESTARTARTING"?
    usleep 1000000?
    sudo service openvpn start?
   fi?
  fi   ?





 else?
  #echo "WIFI DISCONNECTED"?
  if [-f /var/www/uNode/ram/if_reset ] ; then?
   echo ""?




  else?
   touch /var/www/uNode/ram/if_reset?
   if [ -f /var/www/uNode/data/vpn_active ] ; then?
    #echo "VPN IS ACTIVE - STOPPING"?
    sudo service openvpn stop?
   fi?
  fi  ?



  #echo "RESETTING IFACE"?
  usleep 250000?
  ifdown -a?
  usleep 250000?
  ifup -a?
  usleep 250000?
 fi?
else?
 echo "WIFI NOT ACTIVE"?
fi?
?

#
#  Wait 1 second
#

usleep 1000000?

#
# remove the file if_block
#


rm /var/www/uNode/ram/if_block?
?
echo?
usleep 15000000?
done?



#
#  here is a good tutorial on the if statement
#  http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_07_01.html
#
#  The linux documentation project  http://www.tldp.org/  
#
#
#
#