#! /bin/bash

### script to generate ssh-reachable nodes, /share/tmp/ssh-reachable.dat

### list of hosts as recorded in /share/hosts  ################
cat /share/hosts | awk '{print $2}' |  uniq | sort > /share/tmp/temp.dat

cat /share/tmp/temp.dat >> /share/tmp/temp2.dat
hosts=$(cat /share/tmp/temp2.dat | uniq)
echo 'hosts in the clusters as recorded in /share/hosts are' $hosts

rm -rf /share/tmp/temp.dat /share/tmp/temp2.dat
rm -rf  /share/tmp/ssh-reachable.dat /share/tmp/ssh-reachable2.dat
for i in $hosts
	do
		checkping=$(ping -q -c1 -W 1 $i | awk 'NR==4 {print $4}')

		if [ $checkping -eq 0 ]
		then
			dummy=dummy
#			echo $i is not responding to ping after 1 second
		fi

		if [ $checkping -eq 1 ]
		then
			dummy=dummy
#			echo $i is responding to ping within 1 second
			echo $i >> /share/tmp/ssh-reachable.dat
			number=$(echo $i | awk -F"c" '{print $2}')
			if [ -n "$number" ]
			then
			echo 192.168.1.$number >> /share/tmp/ssh-reachable2.dat
			fi
		fi
	done
echo 'ssh-reachable hosts are' $(cat /share/tmp/ssh-reachable.dat)