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chapter17/fs_mon_LINUX_MBFREE_excep.ksh

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+#!/usr/bin/ksh
+#
+# SCRIPT: fs_mon_LINUX_MBFREE_excep.ksh
+# AUTHOR: Randy Michael
+# DATE: 08-22-2007
+# REV: 2.1.P
+# PURPOSE: This script is used to monitor for full filesystems,
+#     which is defined as "exceeding" the FSMAX value.
+#     A message is displayed for all "full" filesystems.
+#
+# PLATFORM: Linux
+#
+# REV LIST:
+#          Randy Michael - 08-27-2007
+#          Changed the code to use MB of free space instead of
+#          the %Used method.
+#
+#          Randy Michael - 08-27-2007
+#          Added code to allow you to override the set script default
+#          for MIN_MB_FREE of FS Space
+#
+# set -n # Uncomment to check syntax without any execution
+# set -x # Uncomment to debug this script
+#
+##### DEFINE FILES AND VARIABLES HERE ####  
+
+WORKFILE="/tmp/df.work" # Holds filesystem data
+>$WORKFILE              # Initialize to empty
+OUTFILE="/tmp/df.outfile" # Output display file
+>$OUTFILE		# Initialize to empty
+EXCEPTIONS="/usr/local/bin/exceptions" # Override data file
+DATA_EXCEPTIONS="/tmp/dfdata.out" # Exceptions file w/o # rows
+THISHOST=`hostname`	# Hostname of this machine
+MIN_MB_FREE="50MB"     # Min. MB of Free FS Space
+
+####### DEFINE FUNCTIONS HERE ########
+
+function check_exceptions
+{
+# set -x # Uncomment to debug this function
+
+while read FSNAME FSLIMIT
+do
+    # Do an NFS sanity check
+    echo $FSNAME | grep ":" >/dev/null \
+         && FSNAME=$(echo $FSNAME | cut -d ":" -f2)
+    if [[ ! -z "$FSLIMIT" && "$FSLIMIT" != '' ]]
+    then
+        (( FSLIMIT = $(echo $FSLIMIT | sed s/MB//g) * 1024 ))
+        if [[ $FSNAME = $FSMOUNT ]]
+        then
+            # Get rid of the "MB" if it exists
+            FSLIMIT=$(echo $FSLIMIT | sed s/MB//g)
+            if (( $FSMB_FREE < $FSLIMIT ))
+            then
+                return 1 # Found out of limit
+            else
+                return 2 # Found OK
+            fi
+        fi
+    fi
+done < $DATA_EXCEPTIONS # Feed the loop from the bottom!!!
+
+return 3 # Not found in $EXCEPTIONS file
+}
+
+######## START OF MAIN #############
+
+if [[ -s $EXCEPTIONS ]]
+then
+    # Ignore all line beginning with a pound sign, #.
+    cat $EXCEPTIONS | grep -v "^#" > $DATA_EXCEPTIONS
+fi
+
+# Get the data of interest by stripping out the
+# /cdrom row and keeping columns 1, 4 and 6
+
+df -k | tail +2 | egrep -v '/cdrom' \
+      | awk '{print $1, $4, $6}' > $WORKFILE
+
+# Format Variables for the proper MB value
+(( MIN_MB_FREE = $(echo $MIN_MB_FREE | sed s/MB//g) * 1024 ))
+
+# Loop through each line of the file and compare column 2
+
+while read FSDEVICE FSMB_FREE FSMOUNT
+do
+    if [[ -s $EXCEPTIONS ]]
+    then
+      check_exceptions
+      RC="$?"
+      if [ $RC -eq 1 ] # Found out of exceptions limit
+      then
+          (( FS_FREE_OUT = $FSMB_FREE / 1000 ))
+           echo "$FSDEVICE mounted on $FSMOUNT only has ${FS_FREE_OUT}MB Free" \
+                >> $OUTFILE
+      elif [ $RC -eq 2 ] # Found in exceptions to be OK
+      then # Just a sanity check - We really do nothing here...
+           # The colon, :, is a NO-OP operator in KSH
+
+          : # No-Op - Do Nothing!
+
+      elif [ $RC -eq 3 ] # Not found in the exceptions file
+      then
+          FSMB_FREE=$(echo $FSMB_FREE | sed s/MB//g) # Remove the "MB"
+          if (( $FSMB_FREE < $MIN_MB_FREE ))
+          then
+              (( FS_FREE_OUT = $FSMB_FREE / 1000 ))
+              echo "$FSDEVICE mounted on $FSMOUNT only has ${FS_FREE_OUT}MB Free" \
+                    >> $OUTFILE
+          fi
+      fi
+    else # No Exceptions file use the script default
+      FSMB_FREE=$(echo $FSMB_FREE | sed s/MB//g) # Remove the "MB"
+      if (( $FSMB_FREE < $MIN_MB_FREE ))
+      then
+          (( FS_FREE_OUT = $FSMB_FREE / 1000 ))
+          echo "$FSDEVICE mounted on $FSMOUNT only has ${FS_FREE_OUT}MB Free" \
+                >> $OUTFILE
+      fi
+    fi
+done < $WORKFILE
+
+if [[ -s $OUTFILE ]]
+then
+      echo "\nFull Filesystem(s) on $THISHOST\n"
+      cat $OUTFILE
+      print
+fi