#!/bin/ksh
#
# Filename - check_diskuse
#
# Program: Checks the diskuse on your hp-ux box and reports the status
# License : GPL or whatever you want it to be... seriously I dont see the point in having any copyright on scripts...
# 2007 Marius van Vuuren (boomroker@gmail.com)
#
# Rename the script to anything you please... 
#
# check_diskuse ,v 1.0 2007/12/13
#
# Description :
#
#  This plugin checks if the disk usage is below the warning and critical levels.
#  You might need to edit the PERCENTUSED awk print variable depending on your OS.
#
# Usage :
#
#  check_diskuse -s filesystem :: example: check_diskuse -s home  
#
# Example :
#
#  To check if home is good on space
# check_diskuse -s home
# > OK - filesystem is sweet : Percent Used 70%
#
# HP-UX - Should be universal but I wrote this for my HP boxes I have to look after
#

help_usage() {
    echo "Usage:"
    echo " $0 -s "
        echo " $0 (-v | --version)"
        echo " $0 (-h | --help)"
}

help_version() {
    echo "check_diskuse (nagios-plugins) 1.0"
    echo "The nagios plugins comes with ABSOLUTELY NO WARRANTY. You may redistribute"
    echo "copies of the plugins under the terms of the GNU General Public License."
	echo "2007 Marius van Vuuren - boomroker@gmail.com"
    echo "If your hiring call me :-)"
}

myself=$0

if [ "$1" = "-h" -o "$1" = "--help" ]
then
help_version
echo ""
echo "This plugin will check if diskspace is ok."
echo ""
help_usage
echo ""
echo "Required Arguments:"
    echo " -s, --stream STRING"
    echo "    filesystem as in /etc/fstab"
echo ""
exit 3
fi

if [ "$1" = "-v" -o "$1" = "--version" ]
then
help_version
    exit 3
fi

if [ `echo $@|tr "=" " "|wc -w` -lt 2 ]
then
echo "Bad arguments number (need two)!"
help_usage
exit 3
fi

stream=""
wt=""
ct=""
crit=""

# Test of the command lines arguments
while test $# -gt 0
do

case "$1" in
-s|--stream)
if [ -n "$stream" ]
then
 echo "Only one --stream argument is useful..."
                            help_usage
                            exit 3
fi
shift
stream="`echo $1|tr \",\" \"|\"`"
;;
*)
echo "Unknown argument $1"
help_usage
exit 3
;;
esac
shift
done

# bdf construction
FSTAB="/etc/fstab"

FILESYSTEM=$(cat $FSTAB | grep $stream | awk ' { print $1 } ' | head -1)
PERCENTUSED=$(bdf $FILESYSTEM | tail -1 | sed 's/'%'//' | awk ' { print $4 } ')

if [ "$PERCENTUSED" -gt 90 ] && [ "$PERCENTUSED" -lt 95 ]
then
crit=1
elif [ "$PERCENTUSED" -ge 95 ]
then
crit=2
else
crit=0
fi

# Finally Inform Nagios of what we found...
if [ $crit -eq 1 ]
then
echo "WARNING - $PERCENTUSED% :: Just a early warning :-)!"
exit 1
elif [ $crit -eq 2 ]
then
echo "CRITICAL - $PERCENTUSED% :: Running out of space and sausage!"
exit 2
else
echo "OK - Filesystem $FILESYSTEM is $PERCENTUSED% full :: nothing to see here :-)"
exit 0
fi

# Hey what are we doing here ???
exit 3