#!/usr/bin/perl -w

# check_digitemp.pl Copyright (C) 2002 by Brian C. Lane <bcl@brianlane.com>
#
# This is a NetSaint plugin script to check the temperature on a local 
# machine. Remote usage may be possible with SSH
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
#
# ===========================================================================
# Howto Install in NetSaint (tested with v0.0.7)
#
# 1. Copy this script to /usr/local/netsaint/libexec/ or wherever you have
#    placed your NetSaint plugins
#
# 2. Create a digitemp config file in /usr/local/netsaint/etc/
#    eg. digitemp -i -s/dev/ttyS0 -c /usr/local/netsaint/etc/digitemp.conf
#
# 3. Make sure that the webserver user has permission to access the serial
#    port being used.
#
# 4. Add a command to /usr/local/netsaint/etc/commands.cfg like this:
#    command[check-temp]=$USER1$/check_digitemp.pl -w $ARG1$ -c $ARG2$ \
#    -t $ARG3$ -f $ARG4$
#    (fold into one line)
#
# 5. Tell NetSaint to monitor the temperature by adding a service line like
#    this to your hosts.cfg file:
#    service[kermit]=Temperature;0;24x7;3;5;1;home-admins;120;24x7;1;1;1;; \
#    check-temp!65!75!1!/usr/local/netsaint/etc/digitemp.conf
#    (fold into one line)
#    65 is the warning temperature
#    75 is the critical temperature
#    1 is the sensor # (as reported by digitemp -a) to monitor
#    digitemp.conf is the path to the config file
#
# 6. If you use Centigrade instead of Fahrenheit, change the commands.cfg
#    line to include the -C argument. You can then pass temperature limits in
#    Centigrade in the service line.
#
# ===========================================================================
# Howto Install in Nagios (tested with v1.0b4)
#
# 1. Copy this script to /usr/local/nagios/libexec/ or wherever you have
#    placed your Nagios plugins
#
# 2. Create a digitemp config file in /usr/local/nagios/etc/
#    eg. digitemp -i -s/dev/ttyS0 -c /usr/local/nagios/etc/digitemp.conf
#
# 3. Make sure that the webserver user has permission to access the serial
#    port being used.
#
# 4. Add a command to /usr/local/nagios/etc/checkcommands.cfg like this:
#
#    #DigiTemp temperature check command
#    define command{
#        command_name    check_temperature
#        command_line    $USER1$/check_digitemp.pl -w $ARG1$ -c $ARG2$ \
#        -t $ARG3$ -f $ARG4$
#    (fold above into one line)
#        }
#
# 5. Tell NetSaint to monitor the temperature by adding a service line like
#    this to your service.cfg file:
#
#    #DigiTemp Temperature check Service definition
#    define service{
#        use                         generic-service
#        host_name                       kermit
#        service_description             Temperature
#        is_volatile                     0
#        check_period                    24x7
#        max_check_attempts              3
#        normal_check_interval           5
#        retry_check_interval            2
#        contact_groups                  home-admins
#        notification_interval           240
#        notification_period             24x7
#        notification_options            w,u,c,r
#        check_command                   check_temperature!65!75!1!  \
#        /usr/local/nagios/etc/digitemp.conf
#        (fold into one line)
#        }
#