CASE READ 1st Line for ORATAB

Question

i have troublesome to export of the 1st line from output from the below script
This script basically lists all SIDs and ORACLE_HOMEs and echo for selection.
I want to automatically to set to line 1 for +ASM instances without prompting. As part of my script, i want to source +ASM instance and run the command automatically without prompt
The below scripts automatically picks up the last line. How do i change it to pick up the 1st line??
Script
if [ `uname -s` = SunOS ]
then
ORATAB=/var/opt/oracle/oratab
else
ORATAB=/etc/oratab
fi
if [ -s "$ORATAB" ]
then
#echo "Standby Oratab Entries:"
#echo " #      DATABASE  NAME       ORACLE_HOME"
#echo "-----   ------------------   -----------------------------------"
set -x
CURSOR=1
while read LINE
do
case $LINE in
\#*) ;; #comment line
"") ;; #null line
LASTSID=`echo $LINE | cut -f1 -d":"`
LASTHOME=`echo $LINE | cut -f2 -d":"`
printf "%5s %20s %40s\n" $CURSOR $LASTSID $LASTHOME
CURSOR=`expr $CURSOR + 1`
#CURSOR=1
esac
done < $ORATAB
#if [ $CURSOR -eq 2 ]
#then
#echo""
#echo "only one database found in oratab..."
echo $LASTSID
echo $LASTHOME
LD_LIBRARY_PATH=$ORACLE_HOME/lib:$ORACLE_HOME/ctx/lib:/usr/lib64:/lib64:/lib:/usr/lib
SHLIB_PATH=$ORACLE_HOME/lib:$ORACLE_HOME/ctx/lib
SQLPATH=$ORACLE_HOME/rdbms/admin:$ORACLE_HOME/sqlplus/admin
ORA_NLS33=$ORACLE_HOME/ocommon/nls/admin/data
PATH=/opt/oracle/local/bin:/usr/openwin/bin:/usr/sbin:/usr/bin:/usr/ucb:/etc:/bin:/sbin:$ORACLE_HOME/bin:$ORACLE_HOME/jdk/bin:$ORACLE_HOME/jdk/jre/bin:$ORACLE_HOME/Apache/Apache/bin:$ORACLE_HOME/Apache/perl/bin:/usr/local/bin:/bin:/sbin
`set -o vi`
PS1="$ORACLE_SID/`uname -n`-> "
alias rm="rm -f"
else
echo ""
echo " "
echo -n "Choose the Database  [ 1 - "`expr $CURSOR - 1`" ] "
#export SELECTION=1
export $CURSOR=1
#read SELECTION
$CURSOR=1
fi
Output
1           
+ASM1                
/u01/app/11.2.0/grid
2        
rdb1v001  /u01/app/oracle/product/11.2.0/dbhome_1
3       
rdb1v001r  /u01/app/oracle/product/11.2.0/dbhome_1
4          
testrj  /u01/app/oracle/product/11.2.0/dbhome_1
5          
rdbp01  /u01/app/oracle/product/11.2.0/dbhome_1
6        
rmb1r001  /u01/app/oracle/product/11.2.0/dbhome_1
rmb1r001
/u01/app/oracle/product/11.2.0/dbhome_1

Answer 1

Sorry I don't want to simply post my script here at OTN. I spent several months working on it and put a lot of thoughts into. I may at some time in the future share it, but it will have to be under different circumstances.
But This will not work as i need to source both SID and HOME
Why not? Simply query the appropriate information. SID and HOME are both stored in /etc/oratab. You simply need to fetch or search the appropriate column and return $1 or $2 from the line, which contain the SID or HOME information.
Get SID and HOME for +ASM:
$ var=`awk -F':' '$1 ~ /+ASM/ { print $1,$2 }' /etc/oratab`
$ echo $var
+ASM /u01/app/oracle/product/11.2.0/grid
Convert result into a variable array using space as delimeter and export each value:
$ var=(${var// / })
$ export a1=`echo ${var[0]}`
$ export a2=`echo ${var[1]}`
$ echo $a1
+ASM
$ echo $a2
/u01/app/oracle/product/11.2.0/grid
If you want to do this for other ASM instances, simply specify the instance name. You can also write a procedure to walk through a list of possible search strings using "for item in "ASM+ ASM1+ ASM2+" do; etc.", if you want to get fancy.