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check_file_exists

Current Version
1.0
Last Release Date
2010-11-10
Compatible With
  • Nagios 3.x
License
GPL
Hits
116481
Files:
FileDescription
check_file_existsPlugin
Network Monitoring Software - Download Nagios XI
Log Management Software - Nagios Log Server - Download
Netflow Analysis Software - Nagios Network Analyzer - Download
Simply script to check if a file exists or not.


- return OK if file exists
- return CRITICAL if the file does not exists
The plugin checks if a file exists.

Returns OK if the file exists , and show the first three lines of the file ( head -3 )

Returns CRITICAL if the file not exists.
Reviews (4)
Hi,

Firstly, thanks for the script(s).

BUT... I am getting the opposite results on the web console than I am from the command line eg:

My check_file_exists file =
#!/bin/sh
#
# Author : Diego Martin Gardella [dgardella@gmail.com]
# Desc : Plugin to verify if a file exists
#
# v1.0: Initial version by (Diego Martin Gardella [dgardella@gmail.com])
# v1.1: Add negate support (Elan Ruusamäe )
# v1.2: Also check if file is folder (Simon Smit)

PROGNAME=`basename $0`
PROGPATH=`echo $0 | sed -e 's,[\\/][^\\/][^\\/]*$,,'`

. $PROGPATH/utils.sh

usage() {
echo "Usage: $PROGRAM [-n] [file]
Options:
-n, --negate negate the result
"
}

state_name() {
case "$STATE" in
$STATE_OK)
echo OK
;;
$STATE_CRITICAL)
echo CRITICAL
;;
esac
}

exists() {
$negate && STATE=$STATE_CRITICAL || STATE=$STATE_OK
echo "$(state_name) - $1 EXISTS"
}

exists_dir() {
$negate && STATE=$STATE_CRITICAL || STATE=$STATE_OK
echo "$(state_name) - $1 EXISTS :: Directory"
}

not_exists() {
$negate && STATE=$STATE_OK || STATE=$STATE_CRITICAL
echo "$(state_name) - $1 Does NOT exist"
}

# parse command line args
t=$(getopt -o n --long negate -n "$PROGNAME" -- "$@")
[ $? != 0 ] && exit $?
eval set -- "$t"

negate=false
while :; do
case "$1" in
-n|--negate)
negate=true
;;
--)
shift
break
;;
*)
echo >&2 "$PROGRAM: Internal error: [$1] not recognized!"
exit 1
;;
esac
shift
done

STATE=$STATE_UNKNOWN
if [ "$1" = "" ]; then
usage
exit $STATE
fi

if [ -f "$1" ]; then
exists "$1"
elif [ -d "$1" ]; then
exists_dir "$1"
else
not_exists "$1"
fi
exit $STATE

==========
In my commands.cfg =
# 'check_file_exists' command definition
define command {
command_name check_file_exists
command_line $USER1$/check_file_exists $ARG1$
}

==========
In my_server_name.cfg =
define service{
use generic-service
host_name my_server_name
service_description Check Backup - Nagios
check_command heck_file_exist!/root/backups/nagios/nagios.tar.gz
}

==========
When I run from the command line...
[root@centos libexec]# ./check_file_exists /root/backups/nagios
OK - /root/backups/nagios EXISTS :: Directory
[root@centos libexec]# ./check_file_exists /root/backups/nagios/nagios.tar.gz
OK - /root/backups/nagios/nagios.tar.gz EXISTS
[root@centos libexec]# ./check_file_exists /root/backups/nagios/nagios.tar
CRITICAL - /root/backups/nagios/nagios.tar Does NOT exist

In the web console...

Check Backup - Nagios | CRITICAL | 27-06-2018 14:22:37 | 0d 0h 0m 30s | 1/3 | CRITICAL - /root/backups/nagios/nagios.tar.gz Does NOT exist

Any ideas as to why I would be getting the opposite result ??

Thanks
bysth_bytelab, August 21, 2016
Hi

I am new to NagiosXI and plugins in general so I want to know if I can use this plugin to monitor file creation on a windows 2008 server.
I also have a question about how the commandline for the plugin are supposed to look?

Thanks
byglen, January 31, 2016
1 of 1 people found this review helpful
hi

i've loaded the existing code to git
and added negate support via -n or --negate option. so released it as v1.1 here:

https://github.com/pld-linux/monitoring-plugin-check_file_exists
Great script, but I needed a script to check if a file does not exist. On my Ubuntu server I want to check if the file /var/run/reboot-required does not exist and warn me if it does (to notify me the server needs a reboot).

To check this I just had to switch the output statements of the script, which I saved as check_file_notexists.

Hereby the altered code for check_file_notexists:

#! /bin/bash
#
# Author : Diego Martin Gardella [dgardella@gmail.com]
# Modified by Erling Ouweneel to switch OK and CRITICAL
#
# Desc : Plugin to verify if a file does not exist
#
#

PROGNAME=`basename $0`
PROGPATH=`echo $0 | sed -e 's,[\\/][^\\/][^\\/]*$,,'`

. $PROGPATH/utils.sh

if [ "$1" = "" ]
then
echo -e " Use : $PROGNAME -- Ex : $PROGNAME /etc/hosts \n "
exit $STATE_UNKNOWN
fi


if [ -f $1 ]
then
echo "CRITICAL - $1 : EXISTS :: `head -3 $1`" # shows the first three lines of the file
exit $STATE_CRITICAL
else
echo "OK : $1 Does NOT exists "
exit $STATE_OK
fi