OpenWritings.net

#!/bin/bash
# Description: Check every 5 minutes whether it is connected to the internet or not
#  and store the result into a file.
 
iconnectionDir=/root/iconnection
mkdir ${iconnectionDir}
 
let SecondsInOneDay=60*60*24
 
# Predefined startup variables.
TimeInSeconds=`date +%s`
CurrentDate=`date +%Y-%m-%d_%H.%M.%S`
InternetConnectionTest="InternetConnectionTest_"$CurrentDate".txt"
 
# Infinite loop
while( true )
do
  sleep 5m
 
  #---------------------------------------------------------------------------
  # Store the internet connection status of the whole day into 1 file per day.
  # Update the output filename if the number of elapsed seconds is greater than 1 day.
  #---------------------------------------------------------------------------
  CurrentTimeInSeconds=`date +%s`
  let DifferenceInSeconds=$CurrentTimeInSeconds-$TimeInSeconds
 
  # Change the output filename if the number of elapsed seconds is greater than 1 day.
  if [ $DifferenceInSeconds -gt $SecondsInOneDay ]
  then
    CurrentDate=`date +%Y-%m-%d_%H.%M.%S`
    InternetConnectionTest="InternetConnectionTest_"$CurrentDate".txt"
    TimeInSeconds=$CurrentTimeInSeconds
  fi
 
  #--------------------------------------------------
  # Test internet connection.
  #--------------------------------------------------
  # Ping timeout = 5 seconds
  if ping -c1 -w 5 -q 4.2.2.2
  then
    echo "`date +%Y-%m-%d_%H.%M.%S` Connected" >> ${iconnectionDir}/$InternetConnectionTest
  else
    echo "`date +%Y-%m-%d_%H.%M.%S` Disconnected" >> ${iconnectionDir}/$InternetConnectionTest
  fi
done
exit 0