Shell Programming and Scripting

#!/bin/bash

tail /oracle/app/admin/ABC/bdump/alert_ABC.log >> tempoutput&


Error=`egrep 'error|warn|critical|fail|ORA-1683' tempoutput`

echo "$Error" |mailx -s "ABC Error "  ABCD@domain.lk

cat /dev/null > tempoutput

if [ $? -eq 0 ]; then
 #errors mail
 #update logfile
exit 1;
fi

if [[ -z $Error ]]
echo "$Error" |mailx -s "ABC Error" ABCD@domain.lk 
fi

#!/bin/bash  
tail /oracle/app/admin/ABC/bdump/alert_ABC.log >> /tmp/tempoutput 
  
Error=`egrep 'error|warn|critical|fail|ORA-1683' /tmp/tempoutput ` 

echo $Error >/tmp/error 
count=`echo $Error|wc -w`

IP=`/usr/sbin/ifconfig ce0 | grep inet | awk '{print $2}'`

if [ $count -ne 0 ] 
then 
echo "$Error" |mailx -s "ABC Error -($IP) "  ABCD@domain.lk
fi 
 
> /tmp/tempoutput
> /tmp/error

NM=/tmp/nmpipe
LOG=input # your log
mkfifo $NM
tail -f -n 0 $LOG > $NM & TPID=$!
while true
do
egrep -q 'error|warn|critical|fail|ORA-1683' $NM
        if [ $? -eq 0 ] 
        then
        i=$(( i + 1 ))
        case $i in
                5) echo "$i errors detected, please check\n"
        ;;
                10) echo "$i error threshold reached, please check, restarting..."
                kill $TPID && i=0
                rm -f $NM
                sleep 5
                mkfifo $NM
                tail -f -n 0 $LOG > $NM & TPID=$!
        ;;
        esac
        fi
done