Shell Programming and Scripting

sendNotice_sp()
{
ATTACH=${LNXLOG:-}
if [ ! -z ${ATTACH} ]; then
if [ -f $ATTACH ]; then
mail -s "$ERR_MSG" $ERR_EMAIL_TO < $ATTACH 
fi
else
mail -s "$ERR_MSG" $ERR_EMAIL_TO < /dev/null 
fi
}

sendNotice_sp() # define a function called sendNotice
{
ATTACH=${LNXLOG:-} # Assign the value of the "LNXLOG:-" variable to the variable ATTACH, seriously who named that?
if [ ! -z ${ATTACH} ]; then # If the ATTACH variable is not empty
if [ -f $ATTACH ]; then # if the ATTACH variable is a valid filename
mail -s "$ERR_MSG" $ERR_EMAIL_TO < $ATTACH  # Send a mail with the value of ERR_MSG as the subject line and The contents of the file to the address in ERR_EMAIL_TO
fi # end filename check
else # ATTACH has no value
mail -s "$ERR_MSG" $ERR_EMAIL_TO < /dev/null  # send an empty message with the error message as the subject line to the ERR_EMAIL_TO address
fi
}

ATTACH=${LNXLOG:-}

${Parameter:-Word} 	If the Parameter parameter is set and is not null, then its value is substituted; otherwise, the value of the Word parameter is substituted.

ATTACH=${LNXLOG:-alternateValue}
ATTACH=${LNXLOG:-$XYZ}

for OUT_TAB in $(eval echo '$JOB_OUTPUT_TABLE_NM'); do

DELIMITER=`echo "$DELIMITER" | sed 's/E//g'`

for OUT_TAB in $(eval echo '$JOB_OUTPUT_TABLE_NM'); do

JOB_OUTPUT_TABLE_NM="EMP DEPT PRODUCT"

DELIMITER=`echo "$DELIMITER" | sed 's/E//g'`

DELIMITER="aeEg"

aeg           ### Only E removed