check_backup_folder

#!/bin/bash
 
# Written by Alexis Bezverkhyy <alexis@grapsus.net> in july 2010
# This is free and unencumbered software released into the public domain.
# For more information, please refer to <http://unlicense.org/>
#
# Small tweaks by Edoardo Causarano <e.causarano@onehippo.com> 
 
function PRINT_USAGE(){
  echo "This Nagios plugin checks backup folders :
  -d DIRECTORY  the directory to search for backup files
  -p PATTERN  an optionnal pattern for backup files
  -t HOURS  maximum age in hours for the latest backup before a warning is issued
  -T HOURS  maximum age in hours for the latest backup before a critical alert is issued
  -s KBYTES minimum size in kilo bytes for the latest backup before a warning is issued
  -S KBYTES minimum size in kilo bytes for the latest backup before a critical alert is issued
  -a GZ|BZ  whether to test for compressed archive integrity (gzip, bzip) 
  -h    prints out this help
You must at least specify a directory and a minimal size or a minimal age."
  exit 0
}
 
WTIME=0;CTIME=0;WSIZE=0;CSIZE=0;DIR='';PATTERN='';AT=''
declare -i CTIME 
declare -i WTIME
declare -i CSIZE
declare -i WSIZE
while true ; do
  getopts 't:T:s:S:d:p:ha:' OPT 
  if [ "$OPT" = '?' ] ; then break; fi; 
  case "$OPT" in
    "t") WTIME="$OPTARG";;
    "T") CTIME="$OPTARG";;
    "s") WSIZE="$OPTARG";;
    "S") CSIZE="$OPTARG";;
    "d") DIR="$OPTARG";;
    "p") PATTERN="$OPTARG";;
    "a") AT="$OPTARG";;
    "h") PRINT_USAGE;;
  esac
done
 
if [ -z "$DIR" -o '(' "$WTIME" = '0' -a "$CTIME" = '0'\
 -a "$WSIZE" = '0' -a "$CSIZE" = '0' ')' ] ; then
  PRINT_USAGE
fi
 
LASTFILE=$(ls -lt --time-style=+%s "$DIR" | grep -v "^total " | grep "$PATTERN"\
 | head -n 1 | sed 's/\s\+/ /g')
if [ -z "$LASTFILE" ] ; then
  echo "CRITICAL - no backup found in $DIR" 
  exit 2
fi
 
TIMESTAMP=$(cut -d ' ' -f 6 <<< "$LASTFILE")
BYTES=$(cut -d ' ' -f 5 <<< "$LASTFILE")
let "SIZE = $BYTES / 1024"
FILENAME=$(cut -d ' ' -f 7 <<< "$LASTFILE")
let "AGE = ( $(date +%s) - $TIMESTAMP ) / 3600"
 
if [ "$CTIME" -gt 0 -a "$AGE" -gt "$CTIME" ] ; then
  echo "CRITICAL - $FILENAME is out of date ($AGE hours old)" 
  exit 2
fi
 
if [ "$WTIME" -gt 0 -a "$AGE" -gt "$WTIME" ] ; then
  echo "WARNING - $FILENAME is out of date ($AGE hours old)"  
  exit 1
fi
 
if [ "$CSIZE" -gt 0 -a "$SIZE" -lt "$CSIZE" ] ; then
  echo "CRITICAL - $FILENAME is too small ($SIZE kb)" 
  exit 2
fi
 
if [ "$WSIZE" -gt 0 -a "$SIZE" -lt "$WSIZE" ] ; then
  echo "WARNING - $FILENAME is too small ($SIZE kb)"  
  exit 1
fi

if [ "$AT" = "gz" -o "$AT" = "GZ" ] ; then
  gzip -t $DIR/$FILENAME  > /dev/null 2>&1
  if [ $? -ne 0 ] ; then
    echo "CRITICAL - $FILENAME is corrupt!"
    exit 1
  fi
fi

if [ "$AT" = "bz" -o "$AT" = "BZ" ] ; then
  bzip -t $DIR/$FILENAME > /dev/null 2>&1
  if [ $? -ne 0 ] ; then
    echo "CRITICAL - $FILENAME is corrupt!"
    exit 1
  fi
fi

echo "OK - $FILENAME ($AGE hours old, $SIZE kb)"
exit 0