#!/bin/sh
# Host throttle script designed to send a maximum of x pages (set in variable $npages) every x minutes (set in variable $ctime - represented in seconds, ie. 600 is 5 # minutes).

# Set Variables

hist=/usr/local/nagios/var/pagehist
storm=/usr/local/nagios/var/storm
ctime=600
npages=5
time=$( date +%s)
admin=nagios@localhost
tmp=/tmp/tmp$$

# Setup Temporary File

rm -f $tmp
touch $tmp

# Check for pagehist file

if [ -f $hist ]; then
    wait
else
    touch $hist
fi

# Purge entries older than x minutes from pagehist file

ttime=`expr $time - $ctime`

awk ' { if($0 > "'"$ttime"'") print $0} ' $hist > $tmp

mv $tmp $hist

# Have more than x pages been sent in the last x minutes - if yes then do not send page.

pages=`echo \`wc -l < $hist\``
mins=`expr $ctime / 60`

if [ "$pages" -ge "$npages" ]; then
        while read line
        do
                if [ "$line" -ne 1 ]; then
                      echo 1 > $storm
                      /bin/mail -s "More than $npages sent in $mins minutes" $8
                      exit 0
                else
                      exit 0
                fi
        done < $storm

else
        /usr/bin/printf "%b" "Host '$1' is $2\nInfo: $3\nTime: $4" | /bin/mail -s "$5 alert - Host $6 is $2" $8
        echo "$time" >>$hist
        echo 0 > $storm
fi

# Clean Up

rm -f $tmp