From 0915b3ef56dfac3113cce55a59a5765dc94976be Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 14:34:54 +0200 Subject: Adding upstream version 2.13.6. Signed-off-by: Daniel Baumann --- plugins/check_users.cpp | 225 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 225 insertions(+) create mode 100644 plugins/check_users.cpp (limited to 'plugins/check_users.cpp') diff --git a/plugins/check_users.cpp b/plugins/check_users.cpp new file mode 100644 index 0000000..9193551 --- /dev/null +++ b/plugins/check_users.cpp @@ -0,0 +1,225 @@ +/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */ + +#include "plugins/thresholds.hpp" +#include +#include +#include +#include +#include + +#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(), "Warning threshold") + ("critical,c", po::wvalue(), "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()); + } catch (const std::invalid_argument& e) { + std::cout << e.what() << '\n'; + return 3; + } + } + if (vm.count("critical")) { + try { + printInfo.crit = threshold(vm["critical"].as()); + } 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); +} -- cgit v1.2.3