#!/bin/bash

################################################################################
##         Pinger v1.00 by Timo Taskinen (timo.taskinen@iki.fi)               ##
## Creative Commons Attribution-Noncommercial-Share Alike 1.0 Finland License ##
##           http://creativecommons.org/licenses/by-nc-sa/1.0                 ##
################################################################################

# Target host or IP to ping.
TARGET="example.com"

# How many seconds to wait for a ping reply.
# Default is 1, but increase it if your connection is laggy.
TIMEOUT=1

# How many pings to send per every cycle. Default is 5.
COUNT=5

# Log file.
LOGFILE="/home/user/internet.log"

# PID file. Set to /dev/null if you don't want one.
PIDFILE="/home/user/pinger.pid"

# Connection lost message.
MSGLOST="Connection lost:    "

# Connection working message.
MSGWORKING="Connection working: "

# What to execute to get the timestamp string.
TIMESTAMPSTRING="date"

#########################################
##  After this there will be dragons.  ##
#########################################

broken=0

echo $$ > $PIDFILE

while [ 1 ]
do

while [ "$broken" == 0 ]
do

  ping -c $COUNT -W $TIMEOUT -A $TARGET > /dev/null
  
  if [ $? != 0 ]
  then
    # Oh noez, mah connecshun iz invisable!
    broken=1
  fi
  
  sleep 1
  
done

echo -n "$MSGLOST" >> $LOGFILE
$TIMESTAMPSTRING >> $LOGFILE

while [ "$broken" == 1 ]
do
  
  ping -c $COUNT -W $TIMEOUT -A $TARGET > /dev/null
  
  if [ $? == 0 ]
  then
    # We has connecshun! Kthxbai.
    broken=0
  fi
  
  sleep 1
  
done

echo -n "$MSGWORKING" >> $LOGFILE
$TIMESTAMPSTRING >> $LOGFILE
echo >> $LOGFILE

done

echo > $PIDFILE