#!/bin/bash
MAILTO="mmckinnon@comprofix.com"
SMTP=mail.comprofix.com
LOGFILE="/var/log/diskalert.log"
THISSERVER=`hostname --fqdn`
MAILFROM="mmckinnon@comprofix.com"

startlogging() {
  echo $DASHES2 >> $LOGFILE
  echo "$0 started running at `date`" >> $LOGFILE
  echo $DASHES2 >> $LOGFILE
}


stoplogging() {
  echo "`date` [MESSAGE] $0 finished runnning" >> $LOGFILE
  echo $DASHES >> $LOGFILE
}

DASHES="---------------------------------------------------------------------------------"
DASHES2="================================================================================="

declare -a DEVICES
index=0

startlogging

for i in $( df -h | grep "/dev/" | grep -v tmpfs | awk '{print $1}' );
do
	DEVICES[$index]=$i
	let "index += 1"
done

for i in ${DEVICES[@]};
do
	let space=`df -Pk $i | grep -v ^File | awk '{printf ("%i", $5) }'`
	if [ $space -le 89 ]
then
	echo "`date` [MESSAGE] Disk space usage on $i acceptable. $space% currently in use." >> $LOGFILE 
fi
if [ $space -ge 90 ]
then

echo "`date` [WARNING] $i is running out of disk space. $space% currently in use." >> $LOGFILE 
echo "
Hello,

You are running out of disk space on $THISSERVER.

Your $i is currently using $space% of disk space.

See the logfile for more info: vim $LOGFILE

Regards, " >/tmp/diskalertmail.msg

cat /tmp/diskalertmail.msg | sendemail -o tls=no -s $SMTP -t $MAILTO -f "$THISSERVER <$MAILTO>" -u "[$THISSERVER] is running out of disk space"
echo "`date` [MESSAGE] Running out of disk space email sent to $MAILTO" >> $LOGFILE

fi
done


stoplogging