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Create dynamic stop/start db instances and TAF services script

My coworker created this script that can dynamically generate stop/start many database instances registered in /etc/oratab, this is a RAC server that has 12c and 11g oracle_homes RDBMS, the generated scripts will loop /etc/oratab and stop the TAF services gracefully first then stop the instances:

 -sh-4.1$ more stop_all_instances.sh
#!/bin/sh
#
# Program: stopallinstances.sh
# Purpose: stop all database instances on the server
# -----------------------------------------------------------------------------
#
# History
#
# Date      Rev  Who                  Comments
# --------- ---- -------------- -----------------------------------------------
# 04Jan2018 1.0  Bing Ge   Created
# 03Sep2019 2.0  Bing Ge   change to start the db in parallel.
#
# ---------------------------------------------------
#
LOCATION=/home/oracle/bge
STARTDB=$LOCATION/scripts/start_db.sh
STOPDB=$LOCATION/scripts/stop_db.sh
timestamp=`date  +%Y_%m_%d_%H_%M_%S`
hostname=`hostname`
LOG_LOCATION=$LOCATION/logs
LOG_FILE=$LOG_LOCATION/stopallinstances_$hostname_$timestamp.log
rm $STARTDB
rm $STOPDB
/net/ACEDBA/ACEDBA/bge/scripts/create_scripts_for_db_in_oh.sh -e prd -v 12 -o /u01/app/oracle/product/12.1.0.2/ACEPRD
/net/ACEDBA/ACEDBA/bge/scripts/create_scripts_for_db_in_oh.sh -e prd -v 12 -o /u01/app/oracle/product/12.1.0
/net/ACEDBA/ACEDBA/bge/scripts/create_scripts_for_db_in_oh.sh -e prd -v 11 -o /u01/app/oracle/product/11.2.0.4
/net/ACEDBA/ACEDBA/bge/scripts/create_scripts_for_db_in_oh.sh -e prd -v 11 -o /u01/app/oracle/product/11.2.0/db_1
chmod +x $STARTDB
chmod +x $STOPDB
$STOPDB  | tee -a $LOG_FILE
while [[ "$(ps -ef | grep stopinstance | grep -v grep)" != "" ]] ;
do
  sleep 5
  echo -n '.'
done
echo "All DB in the list should be down, please check."
exit

The following are the scripts of create_scripts_for_db_in_oh.sh being called above:

-sh-4.1$ more /net/ACEDBA/ACEDBA/bge/scripts/create_scripts_for_db_in_oh.sh
#!/bin/sh
#
# Program: create_scripts_for_db_in_oh.sh
# Purpose: create start/stop scripts for all databases running in the input ORACLE HOME.
# -----------------------------------------------------------------------------
#
# History
#
# Date      Rev  Who                  Comments
# --------- ---- -------------- -----------------------------------------------
# 04DSep2019 1.0  Bing Ge   Created
#
# ---------------------------------------------------
#

timestamp=`date  +%Y_%m_%d_%H_%M_%S`
hostname=`hostname`
ORATAB=/etc/oratab_dba
HOSTNAME=`hostname`
LOCATION=$HOME/bge
STARTALLDB=$LOCATION/scripts/start_db.sh
STOPALLDB=$LOCATION/scripts/stop_db.sh
LOG_LOCATION=$LOCATION/logs
LOG_FILE=$LOG_LOCATION/create_scripts_for_db_in_oh_$hostname_$timestamp.log
RAC=y

usage()
{
    echo "usage: create_scripts_for_db_in_oh.sh [-e dev|tst|sit|uat|stg|prd -v 11|12 -r y|n -o oracle_home -p patch_list -m email] | [-h]]"
}

while [ "$1" != "" ]; do
    case $1 in
        -e | --env )   shift
                        ENV=$1
                                ;;
        -v | --version )   shift
                        VERSION=$1
                                ;;
        -r | --rac )   shift
                       RAC=$1
                       echo $RAC
                                ;;

        -o | --oracle_home )   shift
                                export ORACLE_HOME_P=$1
                                export PATH=$ORACLE_HOME/bin:$ORACLE_HOME/OPatch:/usr/ccs/bin:$PATH
                                export LD_LIBRARY_PATH=$ORACLE_HOME/lib:$LD_LIBRARY_PATH
                                ;;
        -p | --patch_number )   shift
                                PATCHES_LIST=$1
                                echo $PATCHES_LIST
                                ;;
        -m | --email )   shift
                         To_EMAIL_ADDR=$1
                                ;;
        -h | --help )           usage
                                exit
                                ;;
        * )                     usage
                                echo "111$1222"
                                exit 1
    esac
    shift
done

echo ${VERSION}
echo ${ENV}
echo "RAC=${RAC}"

STARTDB=$LOCATION/scripts/start_${VERSION}_${ENV}_db.sh
STOPDB=$LOCATION/scripts/stop_${VERSION}_${ENV}_db.sh
DBPATCH=$LOCATION/scripts/dbpatch_${VERSION}_${ENV}.sh

echo $DBPATCH

rm $STARTDB
rm $STOPDB
rm $DBPATCH

if [ $VERSION == "11" ]
then
  PATCH_LOCATION="/net/ACEDBA/ACEDBA/patches/11.2.0.4"
else
  PATCH_LOCATION="/net/ACEDBA/ACEDBA/patches/12.1.0.2"
fi

echo " creating start/stop/datapatch script for dbs running in $ORACLE_HOME."
cat $ORATAB | while read LINE
do
case $LINE in
  \#*)                ;;        #comment-line in oratab
  *)
  DB_NAME=`echo $LINE | awk -F: '{print $1}' -`
  ORACLE_HOME_1=`echo $LINE | awk -F: '{print $2}' -`

  if [ "$DB_NAME" == '*' ] ; then
    # same as NULL SID - ignore this entry
    ORACLE_SID=""
    continue
  fi
#echo ${DB_NAME}
#echo ${ORACLE_HOME_1}
#echo ${ORACLE_HOME_P}
  if [ "$ORACLE_HOME_1" == "${ORACLE_HOME_P}" ] ; then
     . ${ORACLE_HOME_1}/${DB_NAME}.env
     echo ${DB_NAME}
     if [ ${ORACLE_SID} == "LSNR" ] ; then
        echo "do nothing for ${ORACLE_SID}"
     else
        stopinstance="$LOCATION/scripts/stopinstance${ENV}${ORACLE_SID}";
        startinstance="$LOCATION/scripts/startinstance${ENV}${ORACLE_SID}";
        datapatch="$LOCATION/scripts/datapatch${ENV}${ORACLE_SID}";
        rm $stopinstance
        rm $startinstance
        rm $datapatch

        echo "export ORACLE_SID=${ORACLE_SID}">>$stopinstance
        echo "export ORAENV_ASK=NO">>$stopinstance
        echo ". /usr/local/bin/oraenv">>$stopinstance

        echo "export ORACLE_SID=${ORACLE_SID}">>$startinstance
        echo "export ORAENV_ASK=NO">>$startinstance
        echo ". /usr/local/bin/oraenv">>$startinstance

        echo "export ORACLE_SID=${ORACLE_SID}">>$datapatch
        echo "export ORAENV_ASK=NO">>$datapatch
        echo ". /usr/local/bin/oraenv">>$datapatch

        if [ ${DB_NAME} == "BTCRPRD" -o ${DB_NAME} == "BTCRSTG" ]; then
          echo "do nothing"
        else
          for PATCH_NUMBER in $PATCHES_LIST
          do
            echo "$PATCH_LOCATION/$PATCH_NUMBER/datapatch.sh"
            echo "$PATCH_LOCATION/$PATCH_NUMBER/datapatch.sh">>$datapatch
          done
        fi

        if [ ${RAC} == "y" -o ${RAC} == "Y" ]; then
           if [ $ENV == "dev" -o $ENV == "tst" -o $ENV == "sit" ]; then
             echo "srvctl stop database -d $DB_NAME" >> $stopinstance
             echo "srvctl start database -d $DB_NAME" >> $startinstance
           else
             echo "/net/ACEDBA/ACEDBA/bge/scripts/stop_ace_services.sh $DB_NAME $ORACLE_SID" >> $stopinstance
             if [ $VERSION == "12" ] ; then
               echo "srvctl stop instance -d $DB_NAME -i $ORACLE_SID -stopoption transactional" >> $stopinstance
               echo "srvctl start instance -d $DB_NAME -i $ORACLE_SID" >> $startinstance
             else
               echo "srvctl stop instance -d $DB_NAME -i $ORACLE_SID -o transactional" >> $stopinstance
               echo "srvctl start instance -d $DB_NAME -i $ORACLE_SID" >> $startinstance
             fi
             echo "/net/ACEDBA/ACEDBA/bge/scripts/start_ace_services.sh $DB_NAME $ORACLE_SID" >> $startinstance
           fi
        else
          echo "/net/ACEDBA/ACEDBA/bge/scripts/start_database.sh ${ORACLE_SID}" >>$startinstance
          echo "/net/ACEDBA/ACEDBA/bge/scripts/stop_database.sh ${ORACLE_SID}" >> $stopinstance
        fi
        chmod +x ${stopinstance}
        echo "nohup ${stopinstance}&">>${STOPDB}
        chmod +x ${startinstance}
        echo "nohup ${startinstance}&">>${STARTDB}
        chmod +x ${datapatch}
        echo "${datapatch}">>${DBPATCH}
     fi
  fi
  ;;
esac

done
chmod +x $STARTDB
chmod +x $STOPDB
chmod +x $DBPATCH


cat $STARTDB >> $STARTALLDB
cat $STOPDB >> $STOPALLDB


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