#!/bin/ksh

# -----------------------------------------------------------------------
# Filename:   namesmon.ksh
# Purpose:    Check if the Oracle Names Server is functioning.
# Author:     Frank Naude, Oracle FAQ
# -----------------------------------------------------------------------

NAMESERVER=oranamesrvr0
ORACLE_SID=oranames
ORATAB=/var/opt/oracle/oratab
MAILTO=address\@domain.com
TESTENTRY=orcl

ORACLE_HOME=`grep "^${ORACLE_SID}:" $ORATAB | cut -d: -f2 -s`
PATH=:$ORACLE_HOME/bin:$PATH

#
# Look if Oracle Names Server is installed on this machine
#
if [ ! -x $ORACLE_HOME/bin/namesctl ] ; then
   echo The Oracle Names Server is not installed on this machine or
   echo environment setup is incorrect!!!
   return -1
fi

#
# Check if the nameserver process is running...
#
RC=`ps -ef | egrep '/bin/names' | egrep -v 'grep' | awk '{print $2}'`
if [ "${RC}" = "" ]; then
  echo "Oracle Names Server $NAMESERVER is DOWN!!!"
  /bin/mail ${MAILTO} <<-EOF  # Note the TAB chars
	Subject: Names Server Down!!!

	`date` - Oracle Names Server $NAMESERVER is DOWN!!! 
	EOF
  return -2
fi

#
# Check if the nameserver resolve names...
#
RC=`namesctl <<-EOF | grep normal
	set server $NAMESERVER
	query $TESTENTRY
	exit
	EOF`

if [ "${RC}" = "" ] ; then
  echo "Names Server doesn't resolve names!!!"
  /bin/mail ${MAILTO} <<-EOF
	Subject: Names Server doesn't resolve names!!!

	`date` - Oracle Names Server $NAMESERVER doesn't resolve names!!!
	EOF
  return -3
fi