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-rw-r--r--plugins/check_users.cpp225
1 files changed, 225 insertions, 0 deletions
diff --git a/plugins/check_users.cpp b/plugins/check_users.cpp
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+++ b/plugins/check_users.cpp
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+/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
+
+#include "plugins/thresholds.hpp"
+#include <boost/program_options.hpp>
+#include <iostream>
+#include <windows.h>
+#include <shlwapi.h>
+#include <wtsapi32.h>
+
+#define VERSION 1.0
+
+namespace po = boost::program_options;
+
+struct printInfoStruct
+{
+ threshold warn;
+ threshold crit;
+ DOUBLE users;
+};
+
+static bool l_Debug;
+
+static int parseArguments(int ac, WCHAR **av, po::variables_map& vm, printInfoStruct& printInfo)
+{
+ WCHAR namePath[MAX_PATH];
+ GetModuleFileName(NULL, namePath, MAX_PATH);
+ WCHAR *progName = PathFindFileName(namePath);
+
+ po::options_description desc;
+
+ desc.add_options()
+ ("help,h", "Print help message and exit")
+ ("version,V", "Print version and exit")
+ ("debug,d", "Verbose/Debug output")
+ ("warning,w", po::wvalue<std::wstring>(), "Warning threshold")
+ ("critical,c", po::wvalue<std::wstring>(), "Critical threshold")
+ ;
+
+ po::wcommand_line_parser 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();
+ } catch (const std::exception& e) {
+ std::cout << e.what() << '\n' << desc << '\n';
+ return 3;
+ }
+
+ if (vm.count("help")) {
+ std::wcout << progName << " Help\n\tVersion: " << VERSION << '\n';
+ wprintf(
+ L"%s is a simple program to check a machines logged in users.\n"
+ L"You can use the following options to define its behaviour:\n\n", progName);
+ std::cout << desc;
+ wprintf(
+ L"\nIt will then output a string looking something like this:\n\n"
+ L"\tUSERS WARNING 48 | users=48;10;50;0\n\n"
+ L"\"USERS\" being the type of the check, \"WARNING\" the returned status\n"
+ L"and \"48\" 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"
+ L"if applicable, the maximal value. Performance data will only be displayed when\n"
+ L"you set at least one threshold\n\n"
+ L"%s' exit codes denote the following:\n"
+ L" 0\tOK,\n\tNo Thresholds were broken or the programs check part was not executed\n"
+ L" 1\tWARNING,\n\tThe warning, but not the critical threshold was broken\n"
+ L" 2\tCRITICAL,\n\tThe critical threshold was broken\n"
+ L" 3\tUNKNOWN, \n\tThe program experienced an internal or input error\n\n"
+ 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."
+ , progName);
+ std::cout << '\n';
+ return 0;
+ }
+
+ if (vm.count("version"))
+ std::wcout << L"Version: " << VERSION << '\n';
+
+ if (vm.count("warning")) {
+ try {
+ printInfo.warn = threshold(vm["warning"].as<std::wstring>());
+ } catch (const std::invalid_argument& e) {
+ std::cout << e.what() << '\n';
+ return 3;
+ }
+ }
+ if (vm.count("critical")) {
+ try {
+ printInfo.crit = threshold(vm["critical"].as<std::wstring>());
+ } catch (const std::invalid_argument& e) {
+ std::cout << e.what() << '\n';
+ return 3;
+ }
+ }
+
+ l_Debug = vm.count("debug") > 0;
+
+ return -1;
+}
+
+static int printOutput(printInfoStruct& printInfo)
+{
+ if (l_Debug)
+ std::wcout << L"Constructing output string" << '\n';
+
+ state state = OK;
+
+ if (printInfo.warn.rend(printInfo.users))
+ state = WARNING;
+
+ if (printInfo.crit.rend(printInfo.users))
+ state = CRITICAL;
+
+ switch (state) {
+ case OK:
+ std::wcout << L"USERS OK " << printInfo.users << L" User(s) logged in | 'users'=" << printInfo.users << L";"
+ << printInfo.warn.pString() << L";" << printInfo.crit.pString() << L";0;" << '\n';
+ break;
+ case WARNING:
+ std::wcout << L"USERS WARNING " << printInfo.users << L" User(s) logged in | 'users'=" << printInfo.users << L";"
+ << printInfo.warn.pString() << L";" << printInfo.crit.pString() << L";0;" << '\n';
+ break;
+ case CRITICAL:
+ std::wcout << L"USERS CRITICAL " << printInfo.users << L" User(s) logged in | 'users'=" << printInfo.users << L";"
+ << printInfo.warn.pString() << L";" << printInfo.crit.pString() << L";0;" << '\n';
+ break;
+ }
+
+ return state;
+}
+
+static int check_users(printInfoStruct& printInfo)
+{
+ DOUBLE users = 0;
+ WTS_SESSION_INFOW *pSessionInfo = NULL;
+ DWORD count;
+ DWORD index;
+
+ if (l_Debug)
+ std::wcout << L"Trying to enumerate terminal sessions" << '\n';
+
+ if (!WTSEnumerateSessions(WTS_CURRENT_SERVER_HANDLE, 0, 1, &pSessionInfo, &count)) {
+ std::wcout << L"Failed to enumerate terminal sessions" << '\n';
+ printErrorInfo();
+ if (pSessionInfo)
+ WTSFreeMemory(pSessionInfo);
+ return 3;
+ }
+
+ if (l_Debug)
+ std::wcout << L"Got all sessions (" << count << L"), traversing and counting active ones" << '\n';
+
+ for (index = 0; index < count; index++) {
+ LPWSTR name;
+ DWORD size;
+ int len;
+
+ if (l_Debug)
+ std::wcout << L"Querrying session number " << index << '\n';
+
+ if (!WTSQuerySessionInformation(WTS_CURRENT_SERVER_HANDLE, pSessionInfo[index].SessionId,
+ WTSUserName, &name, &size))
+ continue;
+
+ if (l_Debug)
+ std::wcout << L"Found \"" << name << L"\". Checking whether it's a real session" << '\n';
+
+ len = lstrlenW(name);
+
+ WTSFreeMemory(name);
+
+ if (!len)
+ continue;
+
+ if (pSessionInfo[index].State == WTSActive || pSessionInfo[index].State == WTSDisconnected) {
+ users++;
+ if (l_Debug)
+ std::wcout << L"\"" << name << L"\" is a real session, counting it. Now " << users << '\n';
+ }
+ }
+
+ if (l_Debug)
+ std::wcout << "Finished coutning user sessions (" << users << "). Freeing memory and returning" << '\n';
+
+ WTSFreeMemory(pSessionInfo);
+ printInfo.users = users;
+ return -1;
+}
+
+int wmain(int argc, WCHAR **argv)
+{
+ printInfoStruct printInfo = { };
+ po::variables_map vm;
+
+ int ret = parseArguments(argc, argv, vm, printInfo);
+ if (ret != -1)
+ return ret;
+
+ ret = check_users(printInfo);
+ if (ret != -1)
+ return ret;
+
+ return printOutput(printInfo);
+}