Backup script (alert)

Question

hello all,
I know this is not anything realting to this section but need help on this. i wrote a simple scripts to backup my archive logs, this does the job. But i want to modify this to get e-mail alert only if my backup fails... How would i do that. Right now, if my backup fail or not. I get an e-mail from that box sayings its done or not... here is my scripts...could anyone modify or help me modify this, so that i get e-mail only if my backup fails..i know this has to do with something if/them cmd. But how can this be achive on the below script..
export MMSG=/tmp/$$.mail
export ADDR="[email protected]"
export ORACLE_SID=test
export ORACLE_HOME=/u01/oracle/10g
rm -f $$MMSG > /dev/null 2>&1
echo "ARCHIVE BACKUP STARTED: "'date'
echo "ARCHIVE BACKUP STARTED: "'date' > $MMSG
/u01/oracle/10g/bin/rman target / @/home/oracle/scripts/archive_back.scr >> $MMSG 2>&1
echo "ARCHIVE BACKUP COMPLETED: "'date'
echo "ARCHIVE BACKUP COMPLETED: "'date' >> $MMSG
if [ -f $MMSG ]
then
mailx -s "Archive Backup Status" $ADDR < $MMSG
fi
rm -f $MMSG > /dev/null 2>&1
the other script archive_back.scr is just saying to backup archive logs..
run {
allocate channel t1 .....
backup FILESPERSET=3
(archivelog all delete input format '%t_%s_%r.dbf' channel t3);
exit
want this to be modified in a way, where i only get e-mail alert if my backup fails...

Answer 1

you can check for ORA- errors in $MMSG and then decide if alert should be raised or not:
export MMSG=/tmp/$$.mail
export ADDR="[email protected]"
export ORACLE_SID=test
export ORACLE_HOME=/u01/oracle/10g
rm -f $$MMSG > /dev/null 2>&1
echo "ARCHIVE BACKUP STARTED: "'date'
echo "ARCHIVE BACKUP STARTED: "'date' > $MMSG
/u01/oracle/10g/bin/rman target / @/home/oracle/scripts/archive_back.scr >> $MMSG 2>&1
echo "ARCHIVE BACKUP COMPLETED: "'date'
echo "ARCHIVE BACKUP COMPLETED: "'date' >> $MMSG
errcnt=`grep ORA- $MMSG|wc -l`
if [ [b]errcnt -gt 0 ]
then
mailx -s "Archive Backup Status" $ADDR < $MMSG
fi
rm -f $MMSG > /dev/null 2>&1