Set the default file permissions 
umask 000
#
# Source in the home profile
#
Set the session environment if the file .profile exists in your home directory; I assume this is run from cron 
if [ -f $HOME/.profile ]
then
. $HOME/.profile
else
echo "ERROR: Error sourcing $HOME/.profile !" >> $EBPP_DATAFEED_LOGFILE
exit 10
fi

Define temp variables 
TMP_OUTPUT_FILE="temp_log.tmp"
TMPBATCHPROC="temp_batch.tmp"

Define a variable with today's date 
export CURRENT_FEED=`date +%Y-%m-%d`

Add to the session environment some stuff in this .rc file if it exists 
#
# Source in the environment variables (if possible)
#
if [ -f ./eBPPDataFeed_env.rc ]
then
. ./eBPPDataFeed_env.rc
fi
#

Add more to the session's environment 
# Set the error codes
#
. ./errorcodes.ksh

Add more to the session's environment (username and password probably 
#
# Obtain the secure username and password (if it exists)
#
if [ -f "$BATCH_USER_DIR/batch_user.ksh" ]
then
TMPPWD=`pwd` # v1.1
cd $BATCH_USER_DIR # v1.1
. ./batch_user.ksh # v1.1
RTNCD=$? # v1.1
cd $TMPPWD # v1.1

If previous script return a 0 result, set some Seibel username and password variables; otherwise exit script 
if [ $RTNCD = 0 ]
then
export SIEBEL_USERNAME=$USERID
export SIEBEL_PASSWORD=$PASSWORD
else
exit $EXIT_BATCHUSER_FAILED
fi
else
echo "ERROR: batch_user.ksh does not exist, unable to source in variables" >> $EBPP_DATAFEED_LOGFILE
exit $EXIT_BATCHUSER_DOESNOTEXIST
fi
#
# Check if the Environment Variables are set, if not, exit -1
#
Loop through a list of keywords... 
for i in SIEBEL_USERNAME SIEBEL_PASSWORD \
EBPP_DATAFEED_ROOT EBPP_DATAFEED_DATA EBPP_DATAFEED_SCRIPTS EBPP_DATAFEED_LOGS \
SIEBEL_DB_USERNAME SIEBEL_DB_PASSWORD SIEBEL_DB_ORACLESID SIEBEL_DB_TABLE_OWNER \
SIEBEL_ROOT EXIT_SUCCESS EXIT_ENV_MISSING EXIT_ENV_NOVALUE \
EXIT_SQLPLUSERROR EXIT_BATCHUSER_FAILED EXIT_BATCHUSER_DOESNOTEXIST MINERRORLEVEL
do
Search through environment variables for the keyword 
IS_SETF1=`env | grep "^$i=" | cut -d= -f1`
If the search was unsuccessful, say so and exit script 
if [[ -z $IS_SETF1 ]]
then
echo "FATAL: Environment Variable $i is not set, terminating process" >> $EBPP_DATAFEED_LOGFILE
exit $EXIT_ENV_MISSING
fi
Same thing but this time, check the variable's value 
IS_SETF2=`env | grep "^$i=" | cut -d= -f2`
Exit script if variable wasn't set 
if [[ -z $IS_SETF2 ]]
then
echo "FATAL: Environment Variable $i has no value, terminating process" >> $EBPP_DATAFEED_LOGFILE
exit $EXIT_ENV_NOVALUE
fi
done