#!/bin/sh
#
# This script will report Low Disk Space under a predefined thresh-hold (adjust below)
# created June 2002 by Pete Nesbitt

# this is an updated script that is very specific to the Learn server as far as filesystems and thresh-holds go.

# calculate MB from kilo-bytes output
MB_FACTOR=1024

# Setting directory of temporary files
DISKS=/tmp/df_script.tmp
KBYTES=/tmp/df_script_1.tmp
MB_SIZE=/tmp/df_script_2.tmp
FILESYSTEM=/tmp/df_script_3.tmp
EMAIL_MESSAGE=/tmp/df_script_4.tmp
DISK=/tmp/df_script_5.tmp
EMAIL_RECIPIENT="pete"

# see if less than "THRESH_HOLD" MegaBytes of space left on any given filesystem
THRESH_HOLD_SLASH="500"
THRESH_HOLD_DSK01="300"
THRESH_HOLD_DSK02="200"
THRESH_HOLD_DSK03="250"
THRESH_HOLD_SWAP="500"

df -k|grep "dev/dsk" | grep -v cdrom > $DISKS
df -k|grep swap >> $DISKS


while read LINE
do
  echo $LINE|grep dsk | awk ' { print $6 } '|cut -d/ -f2 > $DISK
  THRESH_HOLD=$THRESH_HOLD_SLASH
  case `cat $DISK` in
        dsk01) 
             THRESH_HOLD=$THRESH_HOLD_DSK01
             ;;
        dsk02)
             THRESH_HOLD=$THRESH_HOLD_DSK02
             ;;
        dsk03)
             THRESH_HOLD=$THRESH_HOLD_DSK03
             ;;
          tmp)
             THRESH_HOLD=$THRESH_HOLD_SWAP
             ;;
  esac

  echo $LINE| awk ' { print $4 } '> $KBYTES
  echo "scale=0;`cat $KBYTES` / $MB_FACTOR" | bc > $MB_SIZE
  echo $LINE | awk ' { print $6 } ' > $FILESYSTEM

  if [ "`cat $MB_SIZE`" -le "$THRESH_HOLD" ]; then
     echo "`date`" > $EMAIL_MESSAGE
     echo " " >> $EMAIL_MESSAGE
     echo "`cat $DISKS`" >> $EMAIL_MESSAGE
     echo "`cat $EMAIL_MESSAGE`" | mailx -s "!!!! WARNING ONLY `cat $MB_SIZE` MB's on `cat $FILESYSTEM` !!!!" $EMAIL_RECIPIENT
  fi
done < $DISKS 

rm -f $DISKS $KBYTES $MB_SIZE $FILESYSTEM $EMAIL_MESSAGE $DISK

exit