icinga2/plugins/check_swap.cpp

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/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org) *
* *
* 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 <Shlwapi.h>
#include <Pdh.h>
#include <iostream>
#include "thresholds.h"
#include "boost\program_options.hpp"
#define VERSION 1.0
namespace po = boost::program_options;
using std::endl; using std::wcout; using std::wstring;
using std::cout;
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struct printInfoStruct
{
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threshold warn, crit;
double swap;
};
static int parseArguments(int, wchar_t **, po::variables_map&, printInfoStruct&);
static int printOutput(printInfoStruct&);
static int check_swap(printInfoStruct&);
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int wmain(int argc, wchar_t **argv)
{
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printInfoStruct printInfo = { };
po::variables_map vm;
int ret = parseArguments(argc, argv, vm, printInfo);
if (ret != -1)
return ret;
ret = check_swap(printInfo);
if (ret != -1)
return ret;
return printOutput(printInfo);
}
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int parseArguments(int ac, wchar_t **av, po::variables_map& vm, printInfoStruct& printInfo)
{
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wchar_t namePath[MAX_PATH];
GetModuleFileName(NULL, namePath, MAX_PATH);
wchar_t *progName = PathFindFileName(namePath);
po::options_description desc;
desc.add_options()
(",h", "print help message and exit")
("help", "print verbose help and exit")
("version,v", "print version and exit")
("warning,w", po::wvalue<wstring>(), "warning threshold")
("critical,c", po::wvalue<wstring>(), "critical threshold")
;
po::basic_command_line_parser<wchar_t> parser(ac, av);
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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cout << e.what() << endl << desc << endl;
return 3;
}
if (vm.count("h")) {
cout << desc << endl;
return 0;
}
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if (vm.count("help")) {
wcout << progName << " Help\n\tVersion: " << VERSION << endl;
wprintf(
L"%s is a simple program to check a machines swap in percent.\n"
L"You can use the following options to define its behaviour:\n\n", progName);
cout << desc;
wprintf(
L"\nIt will then output a string looking something like this:\n\n"
L"\tSWAP WARNING 23.8304%%|swap=23.8304%%;19.5;30;0;100\n\n"
L"\"SWAP\" being the type of the check, \"WARNING\" the returned status\n"
L"and \"23.8304%%\" is the returned value.\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"%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"Threshold syntax:\n\n"
L"-w THRESHOLD\n"
L"warn if threshold is broken, which means VALUE > THRESHOLD\n"
L"(unless stated differently)\n\n"
L"-w !THRESHOLD\n"
L"inverts threshold check, VALUE < THRESHOLD (analogous to above)\n\n"
L"-w [THR1-THR2]\n"
L"warn is VALUE is inside the range spanned by THR1 and THR2\n\n"
L"-w ![THR1-THR2]\n"
L"warn if VALUE is outside the range spanned by THR1 and THR2\n\n"
L"-w THRESHOLD%%\n"
L"if the plugin accepts percentage based thresholds those will be used.\n"
L"Does nothing if the plugin does not accept percentages, or only uses\n"
L"percentage thresholds. Ranges can be used with \"%%\", but both range values need\n"
L"to end with a percentage sign.\n\n"
L"All of these options work with the critical threshold \"-c\" too.\n"
, progName);
cout << endl;
return 0;
}
if (vm.count("version"))
wcout << L"Version: " << VERSION << endl;
if (vm.count("warning")) {
try {
printInfo.warn = parse(vm["warning"].as<wstring>());
} catch (std::invalid_argument& e) {
cout << e.what() << endl;
return 3;
}
}
if (vm.count("critical")) {
try {
printInfo.crit = parse(vm["critical"].as<wstring>());
} catch (std::invalid_argument& e) {
cout << e.what() << endl;
return 3;
}
}
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return -1;
}
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int printOutput(printInfoStruct& printInfo)
{
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state state = OK;
if (printInfo.warn.rend(printInfo.swap))
state = WARNING;
if (printInfo.crit.rend(printInfo.swap))
state = CRITICAL;
switch (state) {
case OK:
wcout << L"SWAP OK " << printInfo.swap << L"%|swap=" << printInfo.swap << L"%;"
<< printInfo.warn.pString() << L";" << printInfo.crit.pString() << L";0;100" << endl;
break;
case WARNING:
wcout << L"SWAP WARNING " << printInfo.swap << L"%|swap=" << printInfo.swap << L"%;"
<< printInfo.warn.pString() << L";" << printInfo.crit.pString() << L";0;100" << endl;
break;
case CRITICAL:
wcout << L"SWAP CRITICAL " << printInfo.swap << L"%|swap=" << printInfo.swap << L"%;"
<< printInfo.warn.pString() << L";" << printInfo.crit.pString() << L";0;100" << endl;
break;
}
return state;
}
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int check_swap(printInfoStruct& printInfo)
{
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PDH_HQUERY phQuery;
PDH_HCOUNTER phCounter;
DWORD dwBufferSize = 0;
DWORD CounterType;
PDH_FMT_COUNTERVALUE DisplayValue;
LPCWSTR path = L"\\Paging File(*)\\% Usage";
if (PdhOpenQuery(NULL, NULL, &phQuery) != ERROR_SUCCESS)
goto cleanup;
if (PdhAddEnglishCounter(phQuery, path, NULL, &phCounter) != ERROR_SUCCESS)
goto cleanup;
if (PdhCollectQueryData(phQuery) != ERROR_SUCCESS)
goto cleanup;
if (PdhGetFormattedCounterValue(phCounter, PDH_FMT_DOUBLE, &CounterType, &DisplayValue) == ERROR_SUCCESS) {
printInfo.swap = DisplayValue.doubleValue;
PdhCloseQuery(phQuery);
return -1;
}
cleanup:
if (phQuery)
PdhCloseQuery(phQuery);
return 3;
}