#!/bin/sh
# this program will search for the servername in a directory and adds a new cluster servername
i=0
found=false
echo "Enter the filename:"
read FILENAME
echo "enter the server name:"
read SERVERNAME
a=$SERVERNAME
for f in $FILENAME
do
  if grep csslu$SERVERNAME $f > /dev/null ;then
    found=true
    echo "file \"$f\" contains server csslu$SERVERNAME"
    rem=$(( $SERVERNAME%2 ))
    if [ $rem -eq 0 ]
    then
      i=$(( a+1 ))
    else
      i=$(( a-1 ))
    fi
    if grep csslu$i $f > /dev/null ; then
      echo "the server name csslu$i already exists in file \"$f\", nothing to add"
    else
      echo "csslu$i" >>$f
      echo "printing tail of $f to check if the cluster is addedd..."
      tail -3 $f
    fi
  fi
done
if [ $found = false ]; then
  echo "csslu$SERVERNAME not found"
fi