#!/usr/bin/php
<?php

/*
 * =============================================================================
 * Nagios XI software update check
 *
 * Copyright:        2011-2020, Nagios Enterprises LLC.
 * Author:           Nagios Dev Team
 * License:          Nagios Open Software License <http://assets.nagios.com/
 *                                    licenses/nagios_open_software_license.txt>
 * Homepage:         http://nagios.com/
 * Description:      Checks for updates to the Nagios XI monitoring software,
 *                     and alert if the running version does not match the
 *                     latest release, with thresholds based on the age of the
 *                     new release so admins can define how quickly they need to
 *                     apply updates to the software.
 *
 * Revision history is kept in private Subversion.
 *
 * Usage: ./check_xi_updates [-w <days>] [-c <days>]
 *        e.g. ./check_xi_updates -w 7 -c 14
 *        e.g. ./check_xi_updates -c 3
 *
 * -----------------------------------------------------------------------------
 *
 * Full license text:
 *
 * Nagios Open Software License Version 1.2
 * 
 * Copyright (c) 2010 Nagios Enterprises, LLC
 * 
 * Nagios Enterprises, LLC (the "Company") hereby grants, free of charge, to any
 * person, company, or legal entity (each a "User") 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 (each a "Use"), and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * i. The above copyright notice and this license shall be included in its
 * entirety in all copies or substantial portions of the Software.
 *
 * ii. The copyright notices and attribution information included in the
 * Software may not be altered or removed.
 *
 * iii. The Software may not be Forked.  "Forking" and "to Fork" means to create
 * or distribute a product or a derivative work of the object or source code of
 * the Software under a new or different brand. 
 *
 * iv. Any Use of the Software is subject to compliance with the terms and
 * conditions of the Nagios Trademark Use Restrictions, which are incorporated
 * herein by reference and can be viewed online at
 * http://www.nagios.com/legal/trademarks/
 *
 * v. Any Contribution of materials to the Software by any User is subject to,
 * and signifies, either explicitly or implicitly, the User's acceptance of the
 * terms and conditions of the Nagios Contributor Agreement, which are
 * incorporated herein by reference and can be viewed online at
 * http://www.nagios.com/legal/contributoragreement/.  "Contribution" means any
 * source code, object code, patch, tool, sample, graphic, specification,
 * manual, documentation, or any other material posted or submitted by a User to
 * the Company, directly or indirectly, via the Company's websites, forums,
 * email lists, or other methods of communication.
 *
 * vi. This license is not intended to restrict any other rights that may be
 * granted to you by other software and associated documentation files that may
 * be included in the Software.  If the Software is considered to be a
 * collective work under U.S. copyright laws, the terms of this license do not
 * apply to other contributions of the collective work unless stated otherwise.
 *
 * vii. 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 FOR DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, STRICT LIABILITY, TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) OR OTHER ACTION, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * viii. The terms of this license are subject to the User's compliance with all
 * terms of this license.  In the event that any term or condition is violated
 * by the User, the terms of this license terminate and the User shall not have
 * any rights they otherwise might have been granted under this license.
 *
 * =============================================================================
 */


function usage() {
	echo "\n";
	echo "Name: check_xi_updates\n";
	echo "Description: Nagios XI software update check\n";
	echo "Author: Tony Yarusso <tyarusso@nagios.com>\n";
	echo "Copyright: 2011, Nagios Enterprises LLC.\n";
	echo "License Nagios Open Software License <http://assets.nagios.com/\n";
	echo "licenses/nagios_open_software_license.txt>\n";
	echo "\n";
	echo "Usage: check_xi_updates [-w <days>] [-c <days>]\n";
	echo "e.g. ./check_xi_updates -w 7 -c 14\n";
	echo "e.g. ./check_xi_updates -c 3\n";
	echo "(<days> refers to the number of days since the last XI release.)\n";
	echo "\n";
	echo "Options:\n";
	echo " -h, --help\n";
	echo "    Print detailed help screen\n";
	echo " -w, --warning\n";
	echo "    Minimum release age in days to trigger a warning state " .
		"[Default=7]\n";
	echo " -c, --critical\n";
	echo "    Minimum release age in days to trigger a critical state ".
		"[Default=14]\n";
	exit(0);
	}

// Implement standard "help" switch for usage information
if ((in_array("-h", $argv)) or (in_array("--help", $argv))) {
	usage();
	}

// Process arguments
$arglen = count($argv);
$i = 1;
while ($i < $arglen) {
	switch ($argv[$i]) {
		case "-w":
			if (isset($argv[($i+1)])) {
				if (intval($argv[($i+1)])) {
					$WARN = $argv[($i+1)];
					$i++;
					}
				else {
					echo "\nThresholds should be a number of days as a " .
						"natural number.\n";
					usage();
					}
				}
			else {
				echo "\nThe -w switch requires a value.\n";
				usage();
				}
			break;
		case "-c":
			if (isset($argv[($i+1)])) {
				if (intval($argv[($i+1)])) {
					$CRIT = $argv[($i+1)];
					$i++;
					}
				else {
					echo "\nThresholds should be a number of days as a " .
						"natural number.\n";
					usage();
					}
				}
			else {
				echo "\nThe -c switch requires a value.\n";
				usage();
				}
			break;
		default:
			echo "\nUnknown option: " . $argv[$i] . "\n";
			usage();
		}
	$i++;
	}

// Check threshold sanity
if (isset($WARN) && isset($CRIT)) {
	if ($WARN > $CRIT) {
		echo "\nWarning value can not be greater than critical value.\n";
		usage();
		}
	}
else {
	if (isset($WARN) || isset($CRIT)) {
		if (!isset($WARN)) {
			if ($CRIT >= 7) {
				$WARN = 7;
				}
			else {
				$WARN = $CRIT;
				}
			}
		elseif (!isset($CRIT)) {
			if ($WARN <= 14) {
				$CRIT = 14;
				}
			else {
				$CRIT = $WARN;
				}
			}
		}
	else {
		$WARN = 7;
		$CRIT = 14;
		}
	}

// Include relevant XI libraries
require_once("/usr/local/nagiosxi/html/includes/common.inc.php");

// Connect to the XI database (where optiosn are stored)
db_connect(DB_NAGIOSXI);
db_connect(DB_NDOUTILS);

// Run the built-in update check process
do_update_check(true);

// Fetch new stored values from the database
$update_available = get_option("update_available");
$update_version = get_option("update_version");
$release_date = strtotime(get_option("update_release_date"));
$release_notes = get_option("update_release_notes");
$check_succeeded = get_option("last_update_check_succeeded");
$check_time = get_option("last_update_check_time");
$product_name = get_product_name(true);
$product_version = get_product_version();
$product_build = get_product_build();

// Format dates into useful types
$build_date_array = strptime($product_build, '%Y%m%d');
$build_year = (1900 + $build_date_array['tm_year']);
if ($build_date_array['tm_mon'] <= 8) {
	$build_month = "0" . (1 + $build_date_array['tm_mon']);
	}
else {
	$build_month = (1 + $build_date_array['tm_mon']);
	}
if ($build_date_array['tm_mday'] <= 8) {
	$build_day = "0" . $build_date_array['tm_mday'];
	}
else {
	$build_day = $build_date_array['tm_mday'];
	}
$build_date = strtotime($build_year . "-" . $build_month . "-" . $build_day);
$todays_date = strtotime(date("Y-m-d"));;

// Calculate number of days since running & latest releases came out
$build_age = floor( ($todays_date - $build_date) / (60*60*24) );
$release_age = floor( ($todays_date - $release_date) / (60*60*24) );

// Set state & message based on loaded values
if ($check_succeeded != 1) {
	$message = "Failed to check for updates.";
	$status = 3;
	$status_text = "XI Updates UNKNOWN";
	$build_age = 0;
	$release_age = 0;
	}
else {
	if ($update_available) {
		$message = "New XI version (" . $update_version . ") available since " .
			date('F jS, Y', $release_date) . ".  Currently running " .
			$product_version . " (" . $build_age . " days old).";
		// Admins might have different standards for when it's acceptable to
		// apply patches, so handle thresholds for number of days release is old
		if ($release_age >= $CRIT) {
			$status = 2;
			$status_text = "XI Updates CRITICAL";
			}
		elseif ($release_age >= $WARN) {
			$status = 1;
			$status_text = "XI Updates WARNING";
			}
		else {
			$status = 0;
			$status_text = "XI Updates OK";
			}
		}
	else {
		$message = "XI version is up to date.  " . $product_version .
			", released " . date('F jS, Y', $release_date) . " (" .
			$release_age . " days ago).";
		$status = 0;
		$status_text = "XI Updates OK";
		$build_age = 0;
		}
	}

// Provide plugin output with performance data
echo $status_text . ": " . $message . "|'Build Age'=" . $build_age .
	";;;0;730 'Release Age'=" . $release_age . ";;;0;730\n";

// Send Nagios a status return code
exit($status);