#!/usr/bin/python
# -*- encoding: utf-8; py-indent-offset: 4 -*-
# +------------------------------------------------------------------+
# |          _           _           _       _   __   _______        |
# |       __| |_  ___ __| |__  _ __ | |__   / | /  \ |__ / _ \       |
# |      / _| ' \/ -_) _| / / | '  \| / /   | || () | |_ \_, /       |
# |      \__|_||_\___\__|_\_\_|_|_|_|_\_\   |_(_)__(_)___//_/        |
# |                                            check_mk 1.0.39       |
# |                                                                  |
# | Copyright Mathias Kettner 2009                mk@mathias-kettner |
# +------------------------------------------------------------------+
# 
# This file is part of check_mk 1.0.39.
# The official homepage is at http://mathias-kettner.de/check_mk.
# 
# check_mk is free software;  you can redistribute it and/or modify it
# under the  terms of the  GNU General Public License  as published by
# the Free Software Foundation in version 2.  check_mk is  distributed
# in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
# out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
# PARTICULAR PURPOSE. See the  GNU General Public License for more de-
# ails.  You should have  received  a copy of the  GNU  General Public
# License along with GNU Make; see the file  COPYING.  If  not,  write
# to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
# Boston, MA 02110-1301 USA.


memused_default_levels = (150.0, 200.0)
mem_extended_perfdata = False

def inventory_mem_used(checkname, info):
   try:
      # simply try potential check. If it returns
      # valid data, assume that item can be checked
      ci = check_mem_used(None, (0,0), info)
      if ci[0] <= 2:
          return [(None, "", "memused_default_levels")]
      else: return []
   except:
      return []
              
def check_mem_used(item, params, info):
    try:
        meminfo = dict([ (i[0][:-1], int(i[1])) for i in info ])
        swapused = meminfo['SwapTotal'] - meminfo['SwapFree']
        memused  = meminfo['MemTotal']  - meminfo['MemFree']
        # Buffers and Cached are optional (not supported on Windows yet)
        caches   = meminfo.get('Buffers', 0) + meminfo.get('Cached', 0)
    except:
        return (3, "UNKNOWN - invalid ouput from plugin")

    # Add extended memory performance data, if this is
    # enabled and the agent provides that information.
    extended_perf = []
    extrainfo = ""
    if mem_extended_perfdata:
        mapped = meminfo.get('Mapped')
        if mapped:
            mapped_mb = int(mapped) / 1024
            committed_as = meminfo.get('Committed_AS')
            if committed_as:
                committed_as_mb = int(committed_as) / 1024
            else:
                committed_as = 0
            extended_perf = [
                ('mapped',       str(mapped_mb)       + 'MB', '', '', 0, ''),
                ('committed_as', str(committed_as_mb) + 'MB', '', '', 0, ''),
            ]
            extrainfo = ", %.1f GB mapped, %.1f GB committed" % \
                        (mapped_mb / 1024.0, committed_as_mb / 1024.0)

    totalused_kb = (swapused + memused - caches) 
    totalused_mb = totalused_kb / 1024
    totalmem_kb = meminfo['MemTotal']
    totalmem_mb = totalmem_kb / 1024
    totalused_perc = 100 * (float(totalused_kb) / float(totalmem_kb))
    totalvirt_mb = (meminfo['SwapTotal'] + meminfo['MemTotal']) / 1024
    warn, crit = params

    perfdata = [ 
        ('ramused', str( (memused - caches) / 1024) + 'MB', '', '', 0, totalmem_mb),
        ('swapused', str(swapused / 1024) + 'MB', '', '', 0, meminfo['SwapTotal']/1024) ]

    # levels may be given either in int -> MB or in float -> percentages

    infotext = ("%.2f GB RAM+SWAP used (this is %.1f%% of RAM size)" % \
               (totalused_mb / 1024.0, totalused_perc)) \
               + extrainfo
    
    if type(warn) == float:
        perfdata.append(('memused', str(totalused_mb)+'MB', int(warn/100.0 * totalmem_mb), int(crit/100.0 * totalmem_mb), 0, totalvirt_mb))
        perfdata += extended_perf
        if totalused_perc >= crit:
            return (2, 'CRIT - %s, critical at %.1f%%' % (infotext, crit), perfdata)
        elif totalused_perc >= warn:
            return (1, 'WARN - %s, warning at %.1f%%' % (infotext, warn), perfdata)
        else:
            return (0, 'OK - %s' % infotext, perfdata)

    else:
        perfdata.append(('memused', str(totalused_mb)+'MB', warn, crit, 0, totalvirt_mb))
        perfdata += extended_perf
        if totalused_mb >= crit:
            return (2, 'CRIT - %s, critical at %.2f GB' % (infotext, crit / 1024.0), perfdata)
        elif totalused_mb >= warn:
            return (1, 'WARN - %s, warning at %.2f GB' % (infotext, warn / 1024.0), perfdata)
        else:
            return (0, 'OK - %s' % infotext, perfdata)


check_info['mem.used'] = (check_mem_used, "Memory used", 1,  inventory_mem_used)
check_config_variables.append("mem_extended_perfdata")
