icinga2/plugins/check_update.cpp

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/******************************************************************************
* Icinga 2 *
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* Copyright (C) 2012-2015 Icinga Development Team (http://www.icinga.org) *
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* *
* This program 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; either version 2 *
* of the License, or (at your option) any later version. *
* *
* 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
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#include <windows.h>
#include <Shlwapi.h>
#include <iostream>
#include <wuapi.h>
#include <wuerror.h>
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#include "check_update.h"
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#define VERSION 1.0
#define CRITERIA L"(IsInstalled = 0 and CategoryIDs contains '0fa1201d-4330-4fa8-8ae9-b877473b6441') or (IsInstalled = 0 and CategoryIDs contains 'E6CF1350-C01B-414D-A61F-263D14D133B4')"
namespace po = boost::program_options;
static BOOL debug = FALSE;
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INT wmain(INT argc, WCHAR **argv)
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{
printInfoStruct printInfo = { FALSE, FALSE, 0, FALSE, FALSE, FALSE };
po::variables_map vm;
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INT ret = parseArguments(argc, argv, vm, printInfo);
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if (ret != -1)
return ret;
ret = check_update(printInfo);
if (ret != -1)
return ret;
return printOutput(printInfo);
}
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INT parseArguments(INT ac, WCHAR **av, po::variables_map& vm, printInfoStruct& printInfo)
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{
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WCHAR namePath[MAX_PATH];
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GetModuleFileName(NULL, namePath, MAX_PATH);
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WCHAR *progName = PathFindFileName(namePath);
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po::options_description desc;
desc.add_options()
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("help,h", "Print help message and exit")
("version,V", "Print version and exit")
("debug,d", "Verbose/Debug output")
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("warning,w", "Warn if there are important updates available")
("critical,c", "Critical if there are important updates that require a reboot")
("possible-reboot", "Treat \"update may need reboot\" as \"update needs reboot\"")
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;
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po::basic_command_line_parser<WCHAR> parser(ac, av);
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try {
po::store(
parser
.options(desc)
.style(
po::command_line_style::unix_style |
po::command_line_style::allow_long_disguise)
.run(),
vm);
vm.notify();
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} catch (std::exception& e) {
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std::cout << e.what() << '\n' << desc << '\n';
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return 3;
}
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if (vm.count("help")) {
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std::wcout << progName << " Help\n\tVersion: " << VERSION << '\n';
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wprintf(
L"%s is a simple program to check a machines required updates.\n"
L"You can use the following options to define its behaviour:\n\n", progName);
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std::cout << desc;
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wprintf(
L"\nAfter some time, it will then output a string like this one:\n\n"
L"\tUPDATE WARNING 8 | updates=8;1;1;0\n\n"
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L"\"UPDATE\" being the type of the check, \"WARNING\" the returned status\n"
L"and \"8\" is the number of important updates updates.\n"
L"The performance data is found behind the \"|\", in order:\n"
L"returned value, warning threshold, critical threshold, minimal value and,\n"
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L"if applicable, the maximal value. Performance data will only be displayed when\n"
L"you set at least one threshold\n\n"
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L"An update counts as important when it is part of the Security- or\n"
L"CriticalUpdates group.\n"
L"Consult the msdn on WSUS Classification GUIDs for more information.\n"
L"%s' exit codes denote the following:\n"
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L" 0\tOK,\n\tNo Thresholds were broken or the programs check part was not executed\n"
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L" 1\tWARNING,\n\tThe warning, but not the critical threshold was broken\n"
L" 2\tCRITICAL,\n\tThe critical threshold was broken\n"
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L" 3\tUNKNOWN, \n\tThe program experienced an internal or input error\n\n"
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L"%s works different from other plugins in that you do not set thresholds\n"
L"but only activate them. Using \"-w\" triggers warning state if there are not\n"
L"installed and non-optional updates. \"-c\" triggers critical if there are\n"
L"non-optional updates that require a reboot.\n"
L"The \"possible-reboot\" option is not recommended since this true for nearly\n"
L"every update."
, progName, progName);
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std::cout << '\n';
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return 0;
} if (vm.count("version")) {
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std::cout << "Version: " << VERSION << '\n';
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return 0;
}
if (vm.count("warning"))
printInfo.warn = TRUE;
if (vm.count("critical"))
printInfo.crit = TRUE;
if (vm.count("possible-reboot"))
printInfo.careForCanRequest = TRUE;
if (vm.count("debug"))
debug = TRUE;
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return -1;
}
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INT printOutput(const printInfoStruct& printInfo)
{
if (debug)
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std::wcout << L"Constructing output string" << '\n';
state state = OK;
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std::wstring output = L"UPDATE ";
if (printInfo.important)
state = WARNING;
if (printInfo.reboot)
state = CRITICAL;
switch (state) {
case OK:
output.append(L"OK ");
break;
case WARNING:
output.append(L"WARNING ");
break;
case CRITICAL:
output.append(L"CRITICAL ");
break;
}
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std::wcout << output << printInfo.numUpdates << L" | update=" << printInfo.numUpdates << L";"
<< printInfo.warn << L";" << printInfo.crit << L";0;" << '\n';
return state;
}
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INT check_update(printInfoStruct& printInfo)
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{
if (debug)
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std::wcout << "Initializing COM library" << '\n';
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CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
ISearchResult *pResult;
IUpdateSession *pSession;
IUpdateSearcher *pSearcher;
BSTR criteria = NULL;
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HRESULT err;
if (debug)
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std::wcout << "Creating UpdateSession and UpdateSearcher" << '\n';
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CoCreateInstance(CLSID_UpdateSession, NULL, CLSCTX_INPROC_SERVER, IID_IUpdateSession, (LPVOID*)&pSession);
pSession->CreateUpdateSearcher(&pSearcher);
/*
IsInstalled = 0: All updates, including languagepacks and features
BrowseOnly = 0: No features or languagepacks, security and unnamed
BrowseOnly = 1: Nothing, broken
RebootRequired = 1: Reboot required
*/
criteria = SysAllocString(CRITERIA);
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// http://msdn.microsoft.com/en-us/library/windows/desktop/aa386526%28v=vs.85%29.aspx
// http://msdn.microsoft.com/en-us/library/ff357803%28v=vs.85%29.aspx
if (debug)
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std::wcout << L"Querrying updates from server" << '\n';
err = pSearcher->Search(criteria, &pResult);
if (!SUCCEEDED(err))
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goto die;
SysFreeString(criteria);
IUpdateCollection *pCollection;
IUpdate *pUpdate;
LONG updateSize;
pResult->get_Updates(&pCollection);
pCollection->get_Count(&updateSize);
if (updateSize == 0)
return -1;
printInfo.numUpdates = updateSize;
// printInfo.important = printInfo.warn;
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IInstallationBehavior *pIbehav;
InstallationRebootBehavior updateReboot;
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for (LONG i = 0; i < updateSize; i++) {
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pCollection->get_Item(i, &pUpdate);
if (debug) {
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std::wcout << L"Checking reboot behaviour of update number " << i << '\n';
}
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pUpdate->get_InstallationBehavior(&pIbehav);
pIbehav->get_RebootBehavior(&updateReboot);
if (updateReboot == irbAlwaysRequiresReboot) {
printInfo.reboot = TRUE;
if (debug)
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std::wcout << L"It requires reboot" << '\n';
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continue;
}
if (printInfo.careForCanRequest && updateReboot == irbCanRequestReboot)
if (debug)
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std::wcout << L"It requires reboot" << '\n';
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printInfo.reboot = TRUE;
}
if (debug)
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std::wcout << L"Cleaning up and returning" << '\n';
SysFreeString(criteria);
CoUninitialize();
return -1;
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die:
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die(err);
CoUninitialize();
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if (criteria)
SysFreeString(criteria);
return 3;
}