Munin contributed plugins

#!/bin/bash

#

# Plugin made by Dju

# useful to know your freebox uptime, and to see when it has rebooted ;)

#

# Uses nmap to get the uptime (by tcp connection, RFC1323)

# ports usually opened on the freebox: 80 554 9100

#

# ----------------------------------------------------------------------------------------------------

# nmap example with the -O option

# on a freebox v5

#

# Starting Nmap 4.62 ( http://nmap.org ) at 2010-12-17 02:25 CET

# Interesting ports on mafreebox.freebox.fr (212.27.38.253):

# Not shown: 1712 filtered ports

# PORT     STATE SERVICE

# 80/tcp   open  http

# 554/tcp  open  rtsp

# 9100/tcp open  jetdirect

# Warning: OSScan results may be unreliable because we could not find at least 1 open and 1 closed port

# Device type: remote management

# Running: HP embedded

# OS details: HP Onboard Administrator management console

# Uptime: 7.226 days (since Thu Dec  9 21:01:44 2010)

# 

# OS detection performed. Please report any incorrect results at http://nmap.org/submit/ .

# Nmap done: 1 IP address (1 host up) scanned in 29.279 seconds

# ----------------------------------------------------------------------------------------------------

#

# by using nmap on a specific tcp port, the detection is pretty fast (2-5 seconds)

# with this command: nmap -O --osscan-guess -p80 remote_host

#

# if you dont want nmap to query your freebox each time, set CACHE_HOURS=n

# to keep the uptime in cache for n hours

# if not, set CACHE_HOURS=0

#

# to allow this plugin to use nmap, edit /etc/munin/plugin-conf.d/munin-node and add

# [FreeboxUptime]

# user root

#

# exit value if error:

# 1: nmap not installed

# 2: freebox not reachable by ping

# 3: uptime not found in nmap result

#

# Magic markers - optional - used by installation scripts and

# munin-config:

#

#%# family=manual

#%# capabilities=autoconf

CACHE_FILE=/var/lib/munin/plugin-state/FreeboxUptime.cache

CACHE_HOURS=3

NMAP=$(which nmap)

TCP_PORT=9100

FREEBOX_HOST=mafreebox.freebox.fr

# check if network connection is ok

if ping -c1 -w1 -s20 $FREEBOX_HOST 2>/dev/null > /dev/null; then

   PING=1

else

   PING=0

fi

if [ "$1" = "autoconf" ]; then

	if [ -z "$NMAP" ]; then

		echo "no (nmap not installed)"

		exit 1

	else

		if [ $PING -eq 0 ]; then

			echo "no (Freebox not reachable)"

			exit 2

		else

			echo yes 

			exit 0

		fi

	fi

fi

if [ "$1" = "config" ]; then

	echo 'graph_title Freebox Uptime'

	echo 'graph_category system'

	echo 'graph_args --base 1000 -l 0 '

	echo 'graph_vlabel uptime in days'

	graph_info="Shows the uptime of your freebox (cache: ${CACHE_HOURS}h"

	if [ -f $CACHE_FILE ]; then

		lastCheck=$(stat -c %z $CACHE_FILE | cut -d"." -f1)

		lastReboot=$(awk -F"@" '{print $2}' $CACHE_FILE)	

		graph_info="${graph_info} - last check: ${lastCheck} - last reboot: $lastReboot"

	else

		graph_info="${graph_info})"

	fi

	echo "graph_info ${graph_info}"

	echo 'uptime.label uptime'

	echo 'uptime.draw AREA'

	exit 0

fi

if [ -z "$NMAP" ]; then

	exit 1

elif [ $PING -eq 0 ]; then

	exit 2

else

	use_nmap=1

	if [ -f $CACHE_FILE ]; then

		ts_cache=$(stat -c %Y $CACHE_FILE)

		ts_now=$(date "+%s")

		sec_diff=$(expr $ts_now - $ts_cache)

		hours_diff=$(expr $sec_diff / 3600)

		if [ $hours_diff -lt $CACHE_HOURS ]; then

			use_nmap=0

			uptime=$(cat $CACHE_FILE | awk -F"@" '{print $1}')

		fi

	fi

	if [ $use_nmap -eq 1 ]; then

		uptime=$(nmap -O --osscan-guess -p${TCP_PORT} ${FREEBOX_HOST} | grep Uptime)

		if [ -z "$uptime" ]; then

			exit 3

		else

			lastReboot=$(echo $uptime | grep -o '(since .*)' | sed 's/(since //g')

			uptime=$(echo $uptime | awk '{print $2}')

			echo "${uptime}@${lastReboot}" > $CACHE_FILE

		fi

	fi

	echo "uptime.value ${uptime}"

fi