export maillist=123@gmail.com;
#df -PH /d04 /d05 /u01 /export | grep -vE '^Filesystem|none|cdrom'|awk '{ print $5 " " $6 }' | while read output;
#df -PH | grep -vE '^Filesystem|none|cdrom|swdepot'|awk '{ print $5 " " $6 }' > diskcheck.log;

#diskcheck is current output whereas disk_alert is previous runned output

if [ -s "$/monitor/log/disk_alert.log" ]; then
#Getting variables and compare with old
  usep=($(cat $/monitor/diskcheck.log | awk '{ print $1 }' | cut -d'%' -f1));
  partitions=($(cat $/monitor/diskcheck.log | awk '{ print $2 }' ));
  usep1=($(cat $/monitor/log/disk_alert.log | awk '{ print $1 }' | cut -d'%' -f1));
else
   cat "$/monitor/diskcheck.log" > "/monitor/log/disk_alert.log";
  usep=($(cat $/monitor/diskcheck.log | awk '{ print $1 }' | cut -d'%' -f1));
  partitions=($(cat $/monitor/diskcheck.log | awk '{ print $2 }' ));
  usep1=($(cat $/monitor/log/disk_alert.log | awk '{ print $1 }' | cut -d'%' -f1));
fi

echo ${usep[@]};
echo ${usep1[@]};
alertlist()
# index = i
for i in ${!usep[@]}; do
        if [ ${usep[$i]} -gt 80 ]; then
                if [ ${usep[$i]} -gt ${usep1[$i]} ]; then
                        #mail=awk '{ ${usep[$i]} print $0 }' $/monitor/diskcheck.log;
                        # Temp to store current percentage diff and partition to store in a variable.
                        tmp="$(echo -e "Running out of space \"${partitions[$i]} (${usep[$i]}%)\" on $(hostname) as on $(date)")";
                        #tmp=$(printf "%s\n" "(${usep[$i]}%) percent used on ${partitions[$i]}");
                        #alertlist holds the values to send mail.
                        #alertlist+="$tmp";
                        echo "$tmp"
                        echo "$tmp" | mail -s "ALERT:  Running out of space" $maillist;
                        #echo "Running out of space \"${partitions[$i]} (${usep[$i]}%)\" on $(hostname) as on $(date)";
                fi
        fi
done
#echo "$alertlist" | mail -s "ALERT:  Running out of space" $maillist;