add secondary ip after primary has been set

addip.sh

#!/bin/sh


if [ $# -ne 1 ]; then
    echo "Usage: addip.sh IPv4CIDR"
    exit 1
fi

IPCIDR=$1

export PATH=$PATH:/usr/bin:/sbin

cat /dev/null > /tmp/ipset.result
echo "INIT STARTED - `date '+%Y-%m-%d %H:%M:%S'`" >> /tmp/ipset.result

while [ 42 ]; do

    MAIN_IP_IS_SET=`ip addr sh eth0 | grep inet | grep brd | wc -l`
    if [ $MAIN_IP_IS_SET -eq 1 ]; then
        break
    fi
    sleep 1

done

echo "MAIN IP IS SET AT  `date '+%Y-%m-%d %H:%M:%S'`" >> /tmp/ipset.result
echo "WATITING 10 seconds" >> /tmp/ipset.result

sleep 10


i=0;
while [ $i -ne 20 ] ; do


    /sbin/ip addr add $IPCIDR dev eth0 2>&1 >> /tmp/ipset.log

    IP_IS_SET=`ip addr sh eth0 | grep $IPCIDR | wc -l`
    if [ $IP_IS_SET -eq 1 ]; then
        echo "`date '+%Y-%m-%d %H:%M:%S'` - IP IS SET on eth0" >> /tmp/ipset.result
        /sbin/ip addr sh eth0 2>&1 > /tmp/ipset.proof
        break
    else
        echo "`date '+%Y-%m-%d %H:%M:%S'` - IP IS NOT SET on eth0" >> /tmp/ipset.result
    fi

    i=$((i+1))
    sleep 0.5;

done

chmod 644 /tmp/ipset*

IP_IS_SET=`ip addr sh eth0 | grep $IPCIDR | wc -l`
if [ $IP_IS_SET -eq 0 ]; then exit 1; else exit 0; fi