Bashscripts.org

#!/bin/bash
##
## Name: mohacu.sh
## MOHACU: MOnitor Hosts And Calculate Uptime
## Version: 1.0.3
## Date: 28/02/2008
## Author: Maarten Trimbos
##
## Description:
##  This script checks with 5 second interval if user
##  configured hosts are up and calculates uptime in %.
##
## Requirements:
##  ping bc mv sleep
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
#######################################################################


###USER CONFIG STARTS HERE###

# Enter hosts to monitor.
# Format is IP\<TAB><TAB># COMMENT
# Yes, it's dirty but it works.
#
HOSTS=( \
192.168.1.1\      # LAN Gateway
192.168.1.3\      # LAN Client
82.133.85.65\      # jolt.co.uk
62.69.184.230\      # nu.nl
66.94.234.13\      # yahoo.com
)

# Where to store log.
#
LOGPATH=~/Desktop

###USER CONFIG ENDS HERE###


# Check for required non-bash commands.
#
CMDS=( ping bc mv sleep )
for CMD in ${CMDS[@]:0}; do
  if [[ `which $CMD 2>/dev/null` = "" ]] ; then
   echo "$CMD not found. Exiting."
  exit
  fi
done

# Some vars.
#
NUM=0
RUNS=1
LOOP=1
LOG=$LOGPATH/mohacu.log

# Check if logfile exists and make a backup if it does.
#
if [ -e $LOG ]; then
mv $LOG $LOG.bak
fi

# Declare a variable for each host to store amount of downs in
# and set these variables to 0.
#
for IP in ${HOSTS[@]:0}; do
let "NUM += 1"
declare "DOWNVAR$NUM"=0
done

# Check if host is up or down.
#
PINGER (){
PING=`ping -c1 -w1 $IP|grep rtt`
test "$PING" != "" && STATEUP || STATEDOWN
}

# Stuff to do when host is up.
#
STATEUP (){
STATE=" UP "
COLOR="\E[1;32m"  ## Green
UP_CALC
}

# Stuff to do when host is down.
#
STATEDOWN (){
STATE=DOWN
COLOR="\E[1;31m" ## Red
let "DOWNVAR$NUM += 1"
UP_CALC
}

# Calculate uptime in %.
# Also adjust output based on value. Purely cosmetic.
#
UP_CALC () {
UP=`echo "scale=2; 100-(100*$((DOWNVAR$NUM))/$RUNS)"|bc`
# Cosmetic stuff starts here.
if [[ $UP = 100.00 ]]; then
   UPECHO="$UP%"
  elif [[ $UP > 9 ]]; then
   UPECHO=" $UP%"
  elif [[ $UP = 0 ]]; then
   UPECHO="  0.00%"
  else UPECHO=" $UP%"
fi
}

# Console output.
#
OUTHEADER () {
echo -e " STATE \tIP \t\t UPTIME"
echo --------------------------------
}
OUTPUT () {
echo -ne "$COLOR $STATE \t" && tput sgr0
echo -e "$IP \t $UPECHO"
}

# Logfile output.
#
OUTHEADERLOG () {
echo -e "IP \t\t  UPTIME"
echo -------------------------
}
OUTPUTLOG () {
echo -e "$IP \t  $UPECHO"
}

# Script shows how many times it has run.
# This function adds 1 to that value after each cycle.
#
CYCLERUNS (){
let "RUNS += 1"
}

# Main loop starts here.
#
until [ $LOOP = 0 ]; do
clear
NUM=0
OUTHEADER
OUTHEADERLOG > $LOG
for IP in ${HOSTS[@]:0}; do
  let "NUM += 1"
  PINGER
  OUTPUT
  OUTPUTLOG >> $LOG
done
echo "Runs: $RUNS"
echo "Runs: $RUNS" >> $LOG
CYCLERUNS
sleep 5
done