granicus.if.org Git - icinga2/blob - plugins/check_swap.cpp

   1 /******************************************************************************
   2  * Icinga 2                                                                   *
   3  * Copyright (C) 2012-2015 Icinga Development Team (http://www.icinga.org)    *
   4  *                                                                            *
   5  * This program is free software; you can redistribute it and/or              *
   6  * modify it under the terms of the GNU General Public License                *
   7  * as published by the Free Software Foundation; either version 2             *
   8  * of the License, or (at your option) any later version.                     *
   9  *                                                                            *
  10  * This program is distributed in the hope that it will be useful,            *
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of             *
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
  13  * GNU General Public License for more details.                               *
  14  *                                                                            *
  15  * You should have received a copy of the GNU General Public License          *
  16  * along with this program; if not, write to the Free Software Foundation     *
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.             *
  18  ******************************************************************************/
  19 #include <Shlwapi.h>
  20 #include <iostream>
  21 #include <WinBase.h>
  22
  23 #include "check_swap.h"
  24
  25 #define VERSION 1.0
  26
  27 namespace po = boost::program_options;
  28
  29 static BOOL debug = FALSE;
  30
  31 INT wmain(INT argc, WCHAR **argv)
  32 {
  33         printInfoStruct printInfo = { };
  34         po::variables_map vm;
  35
  36         INT ret = parseArguments(argc, argv, vm, printInfo);
  37         if (ret != -1)
  38                 return ret;
  39
  40         ret = check_swap(printInfo);
  41         if (ret != -1)
  42                 return ret;
  43
  44         return printOutput(printInfo);
  45 }
  46
  47 INT parseArguments(INT ac, WCHAR **av, po::variables_map& vm, printInfoStruct& printInfo)
  48 {
  49         WCHAR namePath[MAX_PATH];
  50         GetModuleFileName(NULL, namePath, MAX_PATH);
  51         WCHAR *progName = PathFindFileName(namePath);
  52
  53         po::options_description desc;
  54
  55         desc.add_options()
  56                 ("help,h", "Print help message and exit")
  57                 ("version,V", "Print version and exit")
  58                 ("debug,d", "Verbose/Debug output")
  59                 ("warning,w", po::wvalue<std::wstring>(), "Warning threshold")
  60                 ("critical,c", po::wvalue<std::wstring>(), "Critical threshold")
  61                 ("unit,u", po::wvalue<std::wstring>(), "The unit to use for display (default MB)")
  62                 ;
  63
  64         po::basic_command_line_parser<WCHAR> parser(ac, av);
  65
  66         try {
  67                 po::store(
  68                         parser
  69                         .options(desc)
  70                         .style(
  71                         po::command_line_style::unix_style |
  72                         po::command_line_style::allow_long_disguise)
  73                         .run(),
  74                         vm);
  75                 vm.notify();
  76         } catch (std::exception& e) {
  77                 std::cout << e.what() << '\n' << desc << '\n';
  78                 return 3;
  79         }
  80
  81         if (vm.count("help")) {
  82                 std::wcout << progName << " Help\n\tVersion: " << VERSION << '\n';
  83                 wprintf(
  84                         L"%s is a simple program to check a machines swap in percent.\n"
  85                         L"You can use the following options to define its behaviour:\n\n", progName);
  86                 std::cout << desc;
  87                 wprintf(
  88                         L"\nIt will then output a string looking something like this:\n\n"
  89                         L"\tSWAP WARNING - 20%% free | swap=2000B;3000;500;0;10000\n\n"
  90                         L"\"SWAP\" being the type of the check, \"WARNING\" the returned status\n"
  91                         L"and \"20%%\" is the returned value.\n"
  92                         L"The performance data is found behind the \"|\", in order:\n"
  93                         L"returned value, warning threshold, critical threshold, minimal value and,\n"
  94                         L"if applicable, the maximal value. Performance data will only be displayed when\n"
  95                         L"you set at least one threshold\n\n"
  96                         L"%s' exit codes denote the following:\n"
  97                         L" 0\tOK,\n\tNo Thresholds were broken or the programs check part was not executed\n"
  98                         L" 1\tWARNING,\n\tThe warning, but not the critical threshold was broken\n"
  99                         L" 2\tCRITICAL,\n\tThe critical threshold was broken\n"
 100                         L" 3\tUNKNOWN, \n\tThe program experienced an internal or input error\n\n"
 101                         L"Threshold syntax:\n\n"
 102                         L"-w THRESHOLD\n"
 103                         L"warn if threshold is broken, which means VALUE > THRESHOLD\n"
 104                         L"(unless stated differently)\n\n"
 105                         L"-w !THRESHOLD\n"
 106                         L"inverts threshold check, VALUE < THRESHOLD (analogous to above)\n\n"
 107                         L"-w [THR1-THR2]\n"
 108                         L"warn is VALUE is inside the range spanned by THR1 and THR2\n\n"
 109                         L"-w ![THR1-THR2]\n"
 110                         L"warn if VALUE is outside the range spanned by THR1 and THR2\n\n"
 111                         L"-w THRESHOLD%%\n"
 112                         L"if the plugin accepts percentage based thresholds those will be used.\n"
 113                         L"Does nothing if the plugin does not accept percentages, or only uses\n"
 114                         L"percentage thresholds. Ranges can be used with \"%%\", but both range values need\n"
 115                         L"to end with a percentage sign.\n\n"
 116                         L"All of these options work with the critical threshold \"-c\" too.\n"
 117                         , progName);
 118                 std::cout << '\n';
 119                 return 0;
 120         }
 121
 122         if (vm.count("version"))
 123                 std::wcout << L"Version: " << VERSION << '\n';
 124
 125         if (vm.count("warning")) {
 126                 try {
 127                         printInfo.warn = threshold(vm["warning"].as<std::wstring>());
 128                 } catch (std::invalid_argument& e) {
 129                         std::cout << e.what() << '\n';
 130                         return 3;
 131                 }
 132                 printInfo.warn.legal = !printInfo.warn.legal;
 133         }
 134
 135         if (vm.count("critical")) {
 136                 try {
 137                         printInfo.crit = threshold(vm["critical"].as<std::wstring>());
 138                 } catch (std::invalid_argument& e) {
 139                         std::cout << e.what() << '\n';
 140                         return 3;
 141                 }
 142                 printInfo.crit.legal = !printInfo.crit.legal;
 143         }
 144
 145         if (vm.count("debug"))
 146                 debug = TRUE;
 147
 148         if (vm.count("unit")) {
 149                 try {
 150                         printInfo.unit = parseBUnit(vm["unit"].as<std::wstring>());
 151                 } catch (std::invalid_argument& e) {
 152                         std::cout << e.what() << '\n';
 153                         return 3;
 154                 }
 155         }
 156
 157         return -1;
 158 }
 159
 160 INT printOutput(printInfoStruct& printInfo)
 161 {
 162         if (debug)
 163                 std::wcout << L"Constructing output string" << '\n';
 164
 165         state state = OK;
 166         double fswap = ((double)printInfo.aSwap / (double)printInfo.tSwap) * 100.0;
 167
 168         if (printInfo.warn.rend(printInfo.aSwap, printInfo.tSwap))
 169                 state = WARNING;
 170
 171         if (printInfo.crit.rend(printInfo.aSwap, printInfo.tSwap))
 172                 state = CRITICAL;
 173
 174         switch (state) {
 175         case OK:
 176                 std::wcout << L"SWAP OK - " << fswap << L"% free | swap=" << printInfo.aSwap << BunitStr(printInfo.unit) << L";"
 177                         << printInfo.warn.pString(printInfo.tSwap) << L";" << printInfo.crit.pString(printInfo.tSwap)
 178                         << L";0;" << printInfo.tSwap << '\n';
 179                 break;
 180         case WARNING:
 181                 std::wcout << L"SWAP WARNING - " << fswap << L"% free | swap=" << printInfo.aSwap << BunitStr(printInfo.unit) << L";"
 182                         << printInfo.warn.pString(printInfo.tSwap) << L";" << printInfo.crit.pString(printInfo.tSwap)
 183                         << L";0;" << printInfo.tSwap << '\n';
 184                 break;
 185         case CRITICAL:
 186                 std::wcout << L"SWAP CRITICAL - " << fswap << L"% free | swap=" << printInfo.aSwap << BunitStr(printInfo.unit) << L";"
 187                         << printInfo.warn.pString(printInfo.tSwap) << L";" << printInfo.crit.pString(printInfo.tSwap)
 188                         << L";0;" << printInfo.tSwap << '\n';
 189                 break;
 190         }
 191
 192         return state;
 193 }
 194
 195 INT check_swap(printInfoStruct& printInfo)
 196 {
 197         MEMORYSTATUSEX MemBuf;
 198         MemBuf.dwLength = sizeof(MemBuf);
 199
 200         if (!GlobalMemoryStatusEx(&MemBuf)) {
 201                 die();
 202                 return 3;
 203         }
 204
 205         printInfo.tSwap = round(MemBuf.ullTotalPageFile / pow(1024.0, printInfo.unit));
 206         printInfo.aSwap = round(MemBuf.ullAvailPageFile / pow(1024.0, printInfo.unit));
 207
 208         return -1;
 209 }