Shell Programming and Scripting

###########################################
ALERT="90"
ALERT1="85"
DFH="/tmp/dfout"
DFM="/tmp/dfmail"
CHK="/tmp/hdsize-chk"
###########################################
EMAIL="Email ID"
SUBJECT="WARNING! Disk Usage of $(uname -n)"
MAILPROG="/bin/mail"
###########################################

rm -f $DFM
clear
echo
echo `date` | tee $DFM
echo | tee -a $DFM
df -h > $DFH
cat $DFH | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $6 }' | while read output;
do
  #echo $output
  USEP=$(echo $output | awk '{ print $1}' | cut -d'%' -f1  )
  FS=$(echo $output | awk '{ print $2 }' )
  if [ $USEP -gt $ALERT ]
  then
  echo "Running out of space \"$FS - ($USEP%)\"" | tee -a $DFM
  fi
done
if test -f $CHK
then
echo "Not Sending an Email"
exit
else
echo Sending an Email
$MAILPROG -s "$SUBJECT" "$EMAIL" < $DFM
echo Creating Tmp File
touch $CHK
fi
if [ $USEP -lt $ALERT1 ]
then
echo Removing Tmp File
rm -f $CHK
 
fi

Filesystem Size Used Avail Use% Mounted on
/dev/sda1  20G  8.2G 11G   44%   /
/dev/sda3  40G  33G 5.2G   87%   /d01
/dev/sdb  148G  113G 28G   81%   /san
/dev/sdc   50G  9.0G 38G   20%   /san01
/dev/sdd  403G  300G 82G   79%   /san00

#!/bin/bash

do
  echo $DFM

   function space 
   {
      #  This function does a quick read and display of the File System consumption... 
      #     only it formats it in a more human-readable way... 
      df -kP |head -1 |while read a b c d e f g                            \
         ;do printf "\n %-35.35s %12.12s %12.12s %12.12s   spent   %-s \n" \
         $a                                                                \
         GBs                                                               \
         "${c} (GBs)"                                                      \
         "${d} (GBs)"                                                      \
         $f                                                                \
         ;done                                                             \
         && df -kP |egrep -v "Program|Filesystem"                          \
            |while read a b c d e f g                                      \
            ;do printf " %-35.35s %12.2f %12.2f %12.2f   %5.5s   %-s \n"   \
            $a                                                             \
            $(echo "(${b}/1048576*100000)/100000" |bc -l 2>/dev/null )     \
            $(echo "(${c}/1048576*100000)/100000" |bc -l 2>/dev/null )     \
            $(echo "(${d}/1048576*100000)/100000" |bc -l 2>/dev/null )     \
            $e                                                             \
            $f                                                             \
            ;done                                                          \
         && echo 
   }

   function LOG 
   {
      if [ -n "${MY_LOG}" -a -f "${MY_LOG}" ] 
      then 
         print "$@" >>"${MY_LOG}" 
      fi 
   }

   LOG   "\n$(date) : ${0##*/} begin " 

   #  Try to source the appropriate library for space() function... 
   if    [[ ! -r ~/.sh_snippets ]] || [[ ! -x ~/.sh_snippets ]] 
   then 
      LOG "\n\t${0##*/}: Could not access library file: ~/.sh_snippets " 
      LOG "\n$(date) : ${0##*/} complete " 
      exit 1 
   # initialize other stuff... 
   elif  [[ ! -f "...blah..." ]] 
   then 
      LOG "\n\t${0##*/}: required environment...sorry. " 
      LOG "\n$(date) : ${0##*/} complete " 
      exit 1 
   else 
   #  Use the source, young padewan... 
      . ~/.sh_snippets           >/dev/null 2>&1 
   fi 

   #  Checking Filesystem usage...notify if anything in excess of 93%... 
   #  If there's a positive hit on the over 93% crowd, then send an e-mail... 
   if [[ ! -z $(space |egrep "[ 1][09][3-9]\% |100\% ") ]] 
#   if [[ ! -z $(space |egrep "[ 1][09][5-9]\% |100\% ") ]] 
   then 
      space |egrep "^F|[ 1][09][3-9]\% |100\% " |mailx -s "$(uname -n) - Filesystem space warning... $(date )" fu_schnickens@bar.com 
      LOG   "\n\t${0##*/} : Filesystem space warning generated...! " 
   else 
      LOG   "\n\t${0##*/} : Filesystem space okay..." 
   fi