#!/bin/ksh
#
# Check Load Korn Shell Script for Solaris 2.x
# (c) Copyright Oct 1997 Peter Beckman <beckman@purplecow.com>
#
# This program uses the program 'uptime' to grab the load of the system.
# It expects data similar to this:
#  2:37PM  up 20:47, 1 user, load averages: 0.16, 0.11, 0.05
# It splits on the "g" of averages, and then again on the : to get the 
# actual numbers, then splits it more for each value 
# (1 minute, 5 minute, 15 minute averages).  
#
# Uses:
#   /usr/local/bin/top (ftp.groupsys.com/pub/top or
#                       eecs.nwu.edu/pub/top)
#   /usr/bin/mailx
#   /usr/bin/awk
#   /usr/bin/uptime
#
# For more useful shell scripts, check out 'sysadmin central'
# http://www.purplecow.com/sysadmin/
#

##################################################
# Edit the following variables for your own site #
##################################################

# Host
HOST=`/usr/bin/hostname`

# Who to e-mail
EMAILEES="admin"

# Who to page
PAGEES="redalert"

# Log file
LOG="/var/log/load_log"

# Set thresholds of load (in processes waiting for CPU)
LOW_LOAD=2
MED_LOAD=4
HIGH_LOAD=6

DATE=`date`

NOTICE=''
STATUS=''

# Get the real 5 minute average load
UPTIME=`uptime`
LOAD_1=`echo $UPTIME | awk -F"g" '{print $2}' | awk -F":" '{print $2}' | awk -F"," '{print $1}'`
LOAD_5=`echo $UPTIME | awk -F"g" '{print $2}' | awk -F":" '{print $2}' | awk -F"," '{print $2}'`
LOAD_15=`echo $UPTIME | awk -F"g" '{print $2}' | awk -F":" '{print $2}' | awk -F"," '{print $3}'`

# Test it
if [ $LOAD_5 -ge $HIGH_LOAD ]; then
   NOTICE=$NOTICE"CRITCAL CONDITION: The Load on $HOST is at $LOAD_5!!!\n\n"
   STATUS="CRITICAL"
elif [ $LOAD_5 -ge $MED_LOAD ]; then
   NOTICE=$NOTICE"SERIOUS CONDITION: The Load on $HOST is at $LOAD_5!!!\n\n"
   STATUS="SERIOUS"
elif [ $LOAD_5 -ge $LOW_LOAD ]; then
   NOTICE=$NOTICE"HURTING CONDITION: The Load on $HOST is at $LOAD_5!!!\n\n"
   STATUS="HURTING"
fi

if [ ${#NOTICE} -ne 0 ]; then 
   echo "${DATE}: ${NOTICE}" >> /var/log/load_log
   if [ $STATUS = "CRITICAL" ] || [ $STATUS = "SERIOUS" ]; then
      /usr/local/bin/top -b | /usr/bin/mailx -s "$HOST $STATUS: Load at $LOAD_5!!!" $PAGEES
#     echo "Load Critical: Paging $PAGEES..."
   else
      /usr/local/bin/top -b | /usr/bin/mailx -s "$HOST $STATUS: Load at $LOAD_5!!!" $EMAILEES
#     echo "Load Bad: Mailing $EMAILEES..."
   fi
fi