#!/bin/bash


print_details() {
	local myname
	while read line; do
		key=${line%%:*}
		val=`echo ${line#*:}`
		val1=${val%% *}
		[ -z "$line" ] && break
		
		case "$key" in
		"Mount count")		myname=$1; mc=$val ;;
		"Maximum mount count")	mmc=$val ;;
		"Last checked")		lcts=`date +%s -d "$val" 2>/dev/null` ;;
		"Check interval")	ciis=$val1 ;;
		"Lifetime writes")	lwGB=$val1 ;;
		esac
	done
	[ -n "$myname" ] && echo "$myname ${mc:-0} ${mmc:-0} ${lcts:-0} ${ciis:-0} ${lwGB:-0}"
}

lse2() {
	for name in {h,s}d{a..z}{1..16}; do
		if [ -b /dev/$name ]; then
			LANG=C dumpe2fs /dev/$name 2>/dev/null | print_details "$name"
		fi
	done
}


if [ "$1" = "autoconf" ]; then
	if [ -x "`dumpe2fs`" ]; then
		echo yes
		exit 0
	else
		echo no
		exit 1
	fi
fi
if [ "$1" = "suggest" ]; then
	lse2 | while read name rest; do
		echo mounts_$name
		echo checked_$name
		echo writes_$name
	done
	exit 0
fi


self=${0##*/}
self=${self#*_}
plugin=${self%%_*}
if [ -n "${self//[!_]/}" ]; then
	blkdev=${self#*_}
	blkdevAppend=" ($blkdev)"
else
	blkdev=
	blkdevAppend=
fi


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

	echo "graph_category disk"
	args="-l 0"
	case "$plugin" in
	mounts)	
		echo "graph_vlabel times"
		echo "graph_title Ext2 Filesystem mount details"
		;;
	checked)
		echo "graph_vlabel days"
		echo "graph_title Ext2 Filesystem fsck interval"
		;;
	writes)	
		args="$args --base 1024"
		echo "graph_vlabel bytes"
		echo "graph_title Ext2 Filesystem lifetime writes$blkdevAppend"
		;;
	esac
	echo "graph_args $args"
	
	if [ -z "$blkdev" ]; then
		lse2
	else
		LANG=C dumpe2fs /dev/$blkdev 2>/dev/null | print_details "$blkdev"
	fi | \
	while read name mounts maxmounts last interval writes; do
		[ -z "$blkdev" ] && blkdevAppend2=" ($name)" || blkdevAppend2=
		case "$plugin" in
		mounts)
			echo "${name}_mounts.label Mount count$blkdevAppend2"
			echo "${name}_mounts.draw LINE2"
			echo "${name}_maxmounts.label Max. mount count$blkdevAppend2"
			echo "${name}_maxmounts.draw LINE1"
			;;
		checked)
			echo "${name}_last.label Since checked$blkdevAppend2"
			echo "${name}_last.draw LINE2"
			echo "${name}_last.cdef ${name}_last,86400,/"
			echo "${name}_interval.label Check interval$blkdevAppend2"
			echo "${name}_interval.draw LINE1"
			echo "${name}_interval.cdef ${name}_interval,86400,/"
			;;
		writes)
			echo "${name}_writes.label Lifetime writes$blkdevAppend2"
			echo "${name}_writes.type GAUGE"
			echo "${name}_writes.draw LINE2"
			echo "${name}_writes.cdef ${name}_writes,1073741824,*"
			;;
		esac
	done

	exit 0
fi



## fetch ##

if [ -z "$blkdev" ]; then
	lse2
else
	LANG=C dumpe2fs /dev/$blkdev 2>/dev/null | print_details "$blkdev"
fi | \
while read name mounts maxmounts last interval writes; do
	case "$plugin" in
	mounts)
		echo "${name}_mounts.value $mounts"
		echo "${name}_maxmounts.value $maxmounts"
		;;
	checked)
		now=`date +%s`
		past=$(( now - last ))
		echo "${name}_last.value $past"
		echo "${name}_interval.value $interval"
		;;
	writes)
		echo "${name}_writes.value $writes"
		;;
	esac
done