check-filesize.sh

#!/bin/bash
 
# --------------------------------------------------------------------
# **** BEGIN LICENSE BLOCK *****
#
# Version: MPL 1.1
#
# The contents of this file are subject to the Mozilla Public License Version
# 1.1 (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
# http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS IS" basis,
# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
# for the specific language governing rights and limitations under the
# License.
#
# The Original Code is echocat management.
#
# The Initial Developer of the Original Code is Daniel Werdermann.
# Portions created by the Initial Developer are Copyright (C) 2011
# the Initial Developer. All Rights Reserved.
#
# **** END LICENSE BLOCK *****
# --------------------------------------------------------------------
# https://source.echocat.org/browse/management/monitoring/nagios/plugins/check_filesize
# --------------------------------------------------------------------
# Check if a file size is smaller then given parameters.
#
# @author: Daniel Werdermann / dwerdermann@web.de
# @version: 1.1
# @date: 2011-11-04 16:19:42Z
#
# changes 1.1
#  - add licence information
# --------------------------------------------------------------------
# 
 
# --------------------------------------------------------------------
# configuration
# --------------------------------------------------------------------
PROGNAME=$(basename $0)
WARN_MESG=()
CRIT_MESG=()
LOGGER="/bin/logger -i -p kern.warn -t"
 
export PATH="/bin:/usr/local/bin:/sbin:/usr/bin:/usr/sbin"
LIBEXEC="/opt/nagios/libexec /opt/nagios-3/libexec"
for i in ${LIBEXEC};do
  [ -r ${i} ] && . ${i}/utils.sh && break
done
 
if [ -z "$STATE_OK" ];then
  echo "nagios utils.sh not found" &>/dev/stderr
  exit 1
fi
 
# --------------------------------------------------------------------
 
 
# --------------------------------------------------------------------
# functions
# --------------------------------------------------------------------
function log() {
        $LOGGER ${PROGNAME} "$@";
}
 
function usage() {
        echo "Usage: $PROGNAME  -w BYTESIZE -c BYTESIZE FILE [FILE2 FILE3 ...]"
        echo "Usage: $PROGNAME -h,--help"
        echo "Options:"
        echo " FILES     Check this file(s)"
        echo " -w Bytes  Warn if filesize greater then this"
        echo " -c Bytes  Critical filesize greater this"
}
 
function print_help() {
        echo ""
        usage
        echo ""
        echo "Check if filesize is smaller then given parameters"
        echo ""
        echo "This plugin is NOT developped by the Nagios Plugin group."
        echo "Please do not e-mail them for support on this plugin, since"
        echo "they won't know what you're talking about."
        echo ""
        echo "For contact info, read the plugin itself..."
}
 
# --------------------------------------------------------------------
# startup checks
# --------------------------------------------------------------------
 
if [ $# -eq 0 ]; then
        usage
        exit $STATE_CRITICAL
fi
 
while [ "$1" != "" ]
do
        case "$1" in
                --help) print_help; exit $STATE_OK;;
                -h) print_help; exit $STATE_OK;;
                -w) WARN=$2; shift 2;;
                -c) CRIT=$2; shift 2;;
                /*) FILES="${FILES} $1"; shift;;
                *) usage; exit $STATE_UNKNOWN;;
        esac
done
 
 
if [ $WARN -gt $CRIT ] ; then
        log "UNKNOWN: warn value is greater then crit value"
        exit $STATE_UNKNOWN
fi
 
# --------------------------------------------------------------------
# now we check if ...
#  1) ... file exists
#  2) ... has the correct filesize
# --------------------------------------------------------------------
 
for FILE in ${FILES} ; do
        if [ ! -f $FILE ]; then
                log "CRITICAL: $FILE don't exists"
                CRIT_MESG[${#CRIT_MESG[*]}]="${FILE} don't exists"
        fi
 
        SIZE=$(stat -c %s $FILE)
 
        if [ $SIZE -gt $CRIT ] ; then
                log "CRITICAL: ${FILE} has size ${SIZE} Byte. Critical at ${CRIT}."
                CRIT_MESG[${#CRIT_MESG[*]}]="${FILE} has size ${SIZE} Byte. Critical at ${CRIT}."
        elif [ $SIZE -gt $WARN ] ; then
                log "WARN: ${FILE} has size ${SIZE} Byte. Warn at ${CRIT}."
                WARN_MESG[${#WARN_MESG[*]}]="${FILE} has size ${SIZE} Byte. Warn at ${WARN}."
        fi
done
 
if [ ${#CRIT_MESG[*]} -ne 0 ]; then
        echo -n "CRITICAL: "
        for element in "${CRIT_MESG[@]}"; do
                echo -n ${element}" ; "
        done
        echo
        exit $STATE_CRITICAL
elif [ ${#WARN_MESG[*]} -ne 0 ]; then
        echo -n "WARN: "
        for element in "${WARN_MESG[@]}"; do
                echo -n ${element}" ; "
        done
        echo
        exit $STATE_WARNING
fi
 
echo "OK: filesize of ${FILES} is smaller then ${WARN} Bytes."
exit $STATE_OK