Shell Programming and Scripting

#exec > log_$node.log 2>&1
#set -x
> log_$node.log
IP=`command_system NODE_$node RTR:IP6:ADD | grep -i ".10B" | awk '{print$3}'`
port=`command_system NODE_$node RTR:IP6:ADD | grep -i ".10C" | awk '{print$2}' | cut -c 3- | rev | cut -c 5- | rev`

x="$( cut -d ':' -f8  <<< "$IP" )"
y="$( cut -d ':' -f7  <<< "$IP" )"
z="$( cut -d ':' -f1-6  <<< "$IP" )"
y=`echo $y | tr [a-z] [A-Z]`
y=`echo "ibase=16; $y+1" | bc`
y=`echo "obase=16; $y" | bc`
y=`echo $y | tr [A-Z] [a-z]`
NEWIP="$z":"$y":"$x"
p="$( cut -d ':' -f8  <<< "$NEWIP" )"
r="$( cut -d ':' -f1-7  <<< "$NEWIP" )"
p=`echo $p | tr [a-z] [A-Z]`
p=`echo "ibase=16; $p-1" | bc`
p=`echo "obase=16; $p" | bc`
p=`echo $p | tr [A-Z] [a-z]`
p="$r":"$p"

echo ":"
echo ":"
echo ":"
echo "Given NODE OMIP:     $NEWIP"
echo "Given NODE GWIP :     $p"
echo "CONCT  PORT      :     $port"
echo ":"
echo ":"
echo ":"
 
===============================================
Here want to add Condition
There are three "$port"
port_A
port_B
port_C
I Want to add following Conditions in my script.
I Want to add following Conditions in my script.
1.If Node is connected to port_A and port_B script should ask user where he want to run this script Y or N and then using user input run script.
2.If Node is connected to port_C script will run continue
===============================================

 
if ! fenew.sh $NEWIP $p $port
then
        echo "Telnet failed" >&2
        exit 1
fi
.
.
.
rm log_$node.log

[ "$port" != "PORT_C" ] && { read -p"Do you want to run script? " ANS;    [ "${ANS^*}" == "Y" ] && . script; }