Check_disk NRPE script that more or less works on Solaris

gistfile1.txt

#!/usr/bin/bash
#
# Version 0.0.2 - Jan/2009
# Changes: df -P (to avoid it from breaking long lines)
#
# by Thiago Varela - [email protected]
# Ripped from: http://exchange.nagios.org/directory/Plugins/Operating-Systems/Linux/check_disk--2D-%25-used-space/details

function help {
        echo -e "\n\tThis plugin shows the % of used space of a mounted partition, using the 'df' utility\n\n\t$0:\n\t\t-c <integer>\tIf the % of used space is above <integer>, returns CRITICAL state\n\t\t-w <integer>\tIf the % of used space is below CRITICAL and above <integer>, returns WARNING state\n\t\t-d <device>\tThe partition or mountpoint to be checked. eg.  "/dev/sda1", "/home", "/""
        exit -1
}

# Getting parameters:
while getopts "d:w:c:h" OPT; do
        case $OPT in
                "d") device=$OPTARG;;
                "w") warning=$OPTARG;;
                "c") critical=$OPTARG;;
                "h") help;;
        esac
done

# Checking parameters:
( [ "$warning" == "" ] || [ "$critical" == "" ] ) && echo "ERROR: You must specify warning and critical levels" && help
# [ "$device" == "" ]  && echo "ERROR: You must specify the partition to be checked" && help
[[ "$warning" -ge  "$critical" ]] && echo "ERROR: Critical level must be highter than warning level" && help

device_warning=""
used_warning=""
while read device
do
#  ( [[ `df | grep -w $device | wc -l` -gt 1 ]] || [[ `df | grep -w $device | wc -l` -lt 1 ]] ) && echo "ERROR: Partition incorrectly specified" && help
  ( [[ `df | grep -w $device | wc -l` -gt 1 ]] || [[ `df | grep -w $device | wc -l` -lt 1 ]] ) && continue

  # Doing the actual check:
  used=`df -P | grep -w $device | awk '{ print $5 }' | cut -d% -f1`

  # Comparing the result and setting the correct level:
  if [[ $used -ge $critical ]]; then
        echo "CRITICAL - $device space used=$used% | '$device usage'=$used%;$warning;$critical;"
        exit 2
  else if [[ $used -ge $warning ]]; then
        device_warning=$device
        used_warning=$used
        fi
   fi


done < <(mount | awk '{print $1}')

if [[ $device_warning != "" ]]; then
        echo "WARNING - $device_warning space used=$used_warning% | '$device usage'=$used_warning%;$warning;$critical;"
        exit 1
fi

echo "OK - Sth here?" #  | '$device usage'=$used%;$warning;$critical;"
exit 0