#!/usr/bin/python

# Copyright (C) 2009 Andreas Thienemann <andreas@bawue.net>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Library General Public License as published by
# the Free Software Foundation; version 2 only
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#

#
# Munin Plugin to get storage device throughput for Bacula by parsing the bconsole
# output.
#
# Parameters:
#
# 	config   (required)
# 	autoconf (optional - only used by munin-config)
#

# Magic markers (optional - only used by munin-config and some
# installation scripts):
#
#%# family=contrib
#%# capabilities=autoconf

import subprocess
import time
import sys
import re
import os

def parse_devices():
	""" Parse the bconsole output once to get the device names """

	bconsole = subprocess.Popen("bconsole", stdin=subprocess.PIPE, stdout=subprocess.PIPE)
	stdout, stderr = bconsole.communicate("status\n2")

	devs = []

	# Hold the line numbers for devices
	dev_line = []
	input = stdout.split("\n")

	for line, i in zip(input, range(0, len(input))):
		if line.startswith("Connecting to Storage daemon "):
			hostname = line.split()[-1].split(":")[0]
		if line.startswith("Device \""):
			dev_line.append(i)

	for pos in dev_line:
		# Get the device name
		dev_name = input[pos].split()[1][1:-1]
		dev_dev = input[pos].split()[2][1:-1]
		dev_dev_clean = re.sub("^[^A-Za-z_]", "_", dev_dev, 1)
		dev_dev_clean = re.sub("[^A-Za-z0-9_]", "_", dev_dev_clean, 0)
		devs.append([dev_name, dev_dev, dev_dev_clean])

	return hostname, devs


def parse():
	""" Parse the bconsole output """

	bconsole = subprocess.Popen("bconsole", stdin=subprocess.PIPE, stdout=subprocess.PIPE)
	stdout, stderr = bconsole.communicate("status\n2")

	devstats = []

	# Hold the line numbers for devices
	dev_line = []
	input = stdout.split("\n")

	for line, i in zip(input, range(0, len(input))):
		if line.startswith("Device \""):
			dev_line.append(i)

	for pos in dev_line:
		# Get the device name
		dev_dev = input[pos].split()[2][1:-1]
		dev_dev_clean = re.sub("^[^A-Za-z_]", "_", dev_dev, 1)
		dev_dev_clean = re.sub("[^A-Za-z0-9_]", "_", dev_dev_clean, 0)

		# Get the current bytes
		if input[pos].endswith("is mounted with:"):
			bytes = long(input[pos+5].split()[1].split("=")[1].replace(",", ""))
			devstats.append([dev_dev, dev_dev_clean, bytes])
		else:
			devstats.append([dev_dev, dev_dev_clean, 0])

	return devstats


def print_config():
	hostname, devstats = parse_devices()
	print "graph_title Bacula Storage Daemon throughput"
	print "graph_vlabel bytes per ${graph_period}"
	print "graph_args --base 1024 -l 0"
	print "graph_scale yes"
	print "graph_info Bacula Storage Daemon througput measurement based on written bytes. This may be somewhat inacurate whenever a tape is changed."
	print "graph_category backup"
	print "graph_order", 
	for dev in devstats:
		print dev[2],
	print
	if os.getenv("report_hostname") is not None and \
		os.getenv("report_hostname").upper() in ["YES", "TRUE", "1", "Y"]:
		print "host_name", hostname
	for dev in devstats:
		print "%s.label %s" % (dev[2], dev[1])
		print "%s.type DERIVE" % (dev[2])
		print "%s.min 0" % (dev[2])
#		print "%s.max %s" % (dev[2], str(1024*1024*1024*16))
#		print "%s.cdef up,8,*" (dev[2])
	sys.exit(0)


if "config" in sys.argv[1:]:
	print_config()
elif "autoconf" in sys.argv[1:]:
	for dir in os.getenv("PATH").split(":"): 
		for root, dirs, files in os.walk(dir):
			if "bconsole" in files:
				print "yes"
				sys.exit(0)
	print "no"
	sys.exit(1)
elif "suggest" in sys.argv[1:]:
	sys.exit(1)
else:
	for dev in parse():
		print "%s.value %s" % (dev[1], dev[2])