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icinga2/icinga-app/icinga.cpp

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/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-2016 Icinga Development Team (https://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. *
******************************************************************************/
#include "cli/clicommand.hpp"
#include "config/configcompilercontext.hpp"
#include "config/configcompiler.hpp"
#include "config/configitembuilder.hpp"
#include "base/application.hpp"
#include "base/logger.hpp"
#include "base/timer.hpp"
#include "base/utility.hpp"
#include "base/loader.hpp"
#include "base/exception.hpp"
#include "base/convert.hpp"
#include "base/scriptglobal.hpp"
#include "base/context.hpp"
#include "base/console.hpp"
#include "config.h"
#include <boost/program_options.hpp>
#include <boost/tuple/tuple.hpp>
#include <boost/foreach.hpp>
#ifndef _WIN32
# include <sys/types.h>
# include <pwd.h>
# include <grp.h>
#endif /* _WIN32 */
using namespace icinga;
namespace po = boost::program_options;
#ifdef _WIN32
static SERVICE_STATUS l_SvcStatus;
static SERVICE_STATUS_HANDLE l_SvcStatusHandle;
static HANDLE l_Job;
#endif /* _WIN32 */
static std::vector<String> GetLogLevelCompletionSuggestions(const String& arg)
{
std::vector<String> result;
String debugLevel = "debug";
if (debugLevel.Find(arg) == 0)
result.push_back(debugLevel);
String noticeLevel = "notice";
if (noticeLevel.Find(arg) == 0)
result.push_back(noticeLevel);
String informationLevel = "information";
if (informationLevel.Find(arg) == 0)
result.push_back(informationLevel);
String warningLevel = "warning";
if (warningLevel.Find(arg) == 0)
result.push_back(warningLevel);
String criticalLevel = "critical";
if (criticalLevel.Find(arg) == 0)
result.push_back(criticalLevel);
return result;
}
static std::vector<String> GlobalArgumentCompletion(const String& argument, const String& word)
{
if (argument == "include")
return GetBashCompletionSuggestions("directory", word);
else if (argument == "log-level")
return GetLogLevelCompletionSuggestions(word);
else
return std::vector<String>();
}
int Main(void)
{
int argc = Application::GetArgC();
char **argv = Application::GetArgV();
bool autocomplete = false;
int autoindex = 0;
if (argc >= 4 && strcmp(argv[1], "--autocomplete") == 0) {
autocomplete = true;
try {
autoindex = Convert::ToLong(argv[2]);
} catch (const std::invalid_argument& ex) {
Log(LogCritical, "icinga-app")
<< "Invalid index for --autocomplete: " << argv[2];
return EXIT_FAILURE;
}
argc -= 3;
argv += 3;
}
Application::SetStartTime(Utility::GetTime());
if (!autocomplete)
Application::SetResourceLimits();
/* Set thread title. */
Utility::SetThreadName("Main Thread", false);
/* Install exception handlers to make debugging easier. */
Application::InstallExceptionHandlers();
#ifdef _WIN32
bool builtinPaths = true;
String binaryPrefix = Utility::GetIcingaInstallPath();
String dataPrefix = Utility::GetIcingaDataPath();
if (!binaryPrefix.IsEmpty() && !dataPrefix.IsEmpty()) {
Application::DeclarePrefixDir(binaryPrefix);
Application::DeclareSysconfDir(dataPrefix + "\\etc");
Application::DeclareRunDir(dataPrefix + "\\var\\run");
Application::DeclareLocalStateDir(dataPrefix + "\\var");
Application::DeclarePkgDataDir(binaryPrefix + "\\share\\icinga2");
Application::DeclareIncludeConfDir(binaryPrefix + "\\share\\icinga2\\include");
} else {
Log(LogWarning, "icinga-app", "Registry key could not be read. Falling back to built-in paths.");
#endif /* _WIN32 */
Application::DeclarePrefixDir(ICINGA_PREFIX);
Application::DeclareSysconfDir(ICINGA_SYSCONFDIR);
Application::DeclareRunDir(ICINGA_RUNDIR);
Application::DeclareLocalStateDir(ICINGA_LOCALSTATEDIR);
Application::DeclarePkgDataDir(ICINGA_PKGDATADIR);
Application::DeclareIncludeConfDir(ICINGA_INCLUDECONFDIR);
#ifdef _WIN32
}
#endif /* _WIN32 */
Application::DeclareZonesDir(Application::GetSysconfDir() + "/icinga2/zones.d");
Application::DeclareRunAsUser(ICINGA_USER);
Application::DeclareRunAsGroup(ICINGA_GROUP);
Application::DeclareConcurrency(boost::thread::hardware_concurrency());
if (!ScriptGlobal::Exists("UseVfork"))
#ifdef __APPLE__
ScriptGlobal::Set("UseVfork", false);
#else /* __APPLE__ */
ScriptGlobal::Set("UseVfork", true);
#endif /* __APPLE__ */
ScriptGlobal::Set("AttachDebugger", false);
ScriptGlobal::Set("PlatformKernel", Utility::GetPlatformKernel());
ScriptGlobal::Set("PlatformKernelVersion", Utility::GetPlatformKernelVersion());
ScriptGlobal::Set("PlatformName", Utility::GetPlatformName());
ScriptGlobal::Set("PlatformVersion", Utility::GetPlatformVersion());
ScriptGlobal::Set("PlatformArchitecture", Utility::GetPlatformArchitecture());
ScriptGlobal::Set("BuildHostName", ICINGA_BUILD_HOST_NAME);
ScriptGlobal::Set("BuildCompilerName", ICINGA_BUILD_COMPILER_NAME);
ScriptGlobal::Set("BuildCompilerVersion", ICINGA_BUILD_COMPILER_VERSION);
LogSeverity logLevel = Logger::GetConsoleLogSeverity();
Logger::SetConsoleLogSeverity(LogWarning);
Loader::LoadExtensionLibrary("cli");
po::options_description visibleDesc("Global options");
visibleDesc.add_options()
("help,h", "show this help message")
("version,V", "show version information")
#ifndef _WIN32
("color", "use VT100 color codes even when stdout is not a terminal")
#endif /* _WIN32 */
("define,D", po::value<std::vector<std::string> >(), "define a constant")
("app,a", po::value<std::string>(), "application library name (default: icinga)")
("library,l", po::value<std::vector<std::string> >(), "load a library")
("include,I", po::value<std::vector<std::string> >(), "add include search directory")
("log-level,x", po::value<std::string>(), "specify the log level for the console log.\n"
"The valid value is either debug, notice, information (default), warning, or critical")
("script-debugger,X", "whether to enable the script debugger");
po::options_description hiddenDesc("Hidden options");
hiddenDesc.add_options()
("no-stack-rlimit", "used internally, do not specify manually")
("arg", po::value<std::vector<std::string> >(), "positional argument");
po::positional_options_description positionalDesc;
positionalDesc.add("arg", -1);
String cmdname;
CLICommand::Ptr command;
po::variables_map vm;
try {
CLICommand::ParseCommand(argc, argv, visibleDesc, hiddenDesc, positionalDesc,
vm, cmdname, command, autocomplete);
} catch (const std::exception& ex) {
Log(LogCritical, "icinga-app")
<< "Error while parsing command-line options: " << ex.what();
return EXIT_FAILURE;
}
String initconfig = Application::GetSysconfDir() + "/icinga2/init.conf";
if (Utility::PathExists(initconfig)) {
Expression *expression;
try {
expression = ConfigCompiler::CompileFile(initconfig);
ScriptFrame frame;
expression->Evaluate(frame);
} catch (const std::exception& ex) {
delete expression;
Log(LogCritical, "config", DiagnosticInformation(ex));
return EXIT_FAILURE;
}
delete expression;
}
#ifndef _WIN32
if (vm.count("color")) {
Console::SetType(std::cout, Console_VT100);
Console::SetType(std::cerr, Console_VT100);
}
#endif /* _WIN32 */
if (vm.count("define")) {
BOOST_FOREACH(const String& define, vm["define"].as<std::vector<std::string> >()) {
String key, value;
size_t pos = define.FindFirstOf('=');
if (pos != String::NPos) {
key = define.SubStr(0, pos);
value = define.SubStr(pos + 1);
} else {
key = define;
value = "1";
}
ScriptGlobal::Set(key, value);
}
}
if (vm.count("script-debugger"))
Application::SetScriptDebuggerEnabled(true);
Application::DeclareStatePath(Application::GetLocalStateDir() + "/lib/icinga2/icinga2.state");
Application::DeclareModAttrPath(Application::GetLocalStateDir() + "/lib/icinga2/modified-attributes.conf");
Application::DeclareObjectsPath(Application::GetLocalStateDir() + "/cache/icinga2/icinga2.debug");
Application::DeclareVarsPath(Application::GetLocalStateDir() + "/cache/icinga2/icinga2.vars");
Application::DeclarePidPath(Application::GetRunDir() + "/icinga2/icinga2.pid");
ConfigCompiler::AddIncludeSearchDir(Application::GetIncludeConfDir());
if (!autocomplete && vm.count("include")) {
BOOST_FOREACH(const String& includePath, vm["include"].as<std::vector<std::string> >()) {
ConfigCompiler::AddIncludeSearchDir(includePath);
}
}
if (!autocomplete) {
Logger::SetConsoleLogSeverity(logLevel);
if (vm.count("log-level")) {
String severity = vm["log-level"].as<std::string>();
LogSeverity logLevel = LogInformation;
try {
logLevel = Logger::StringToSeverity(severity);
} catch (std::exception&) {
/* Inform user and exit */
Log(LogCritical, "icinga-app", "Invalid log level set. Default is 'information'.");
return EXIT_FAILURE;
}
Logger::SetConsoleLogSeverity(logLevel);
}
if (vm.count("library")) {
BOOST_FOREACH(const String& libraryName, vm["library"].as<std::vector<std::string> >()) {
try {
(void) Loader::LoadExtensionLibrary(libraryName);
} catch (const std::exception& ex) {
Log(LogCritical, "icinga-app")
<< "Could not load library \"" << libraryName << "\": " << DiagnosticInformation(ex);
return EXIT_FAILURE;
}
}
}
if (!command || vm.count("help") || vm.count("version")) {
String appName;
try {
appName = Utility::BaseName(Application::GetArgV()[0]);
} catch (const std::bad_alloc&) {
Log(LogCritical, "icinga-app", "Allocation failed.");
return EXIT_FAILURE;
}
if (appName.GetLength() > 3 && appName.SubStr(0, 3) == "lt-")
appName = appName.SubStr(3, appName.GetLength() - 3);
std::cout << appName << " " << "- The Icinga 2 network monitoring daemon (version: "
<< ConsoleColorTag(vm.count("version") ? Console_ForegroundRed : Console_Normal)
<< Application::GetAppVersion()
#ifdef I2_DEBUG
<< "; debug"
#endif /* I2_DEBUG */
<< ConsoleColorTag(Console_Normal)
<< ")" << std::endl << std::endl;
if ((!command || vm.count("help")) && !vm.count("version")) {
std::cout << "Usage:" << std::endl
<< " " << argv[0] << " ";
if (cmdname.IsEmpty())
std::cout << "<command>";
else
std::cout << cmdname;
std::cout << " [<arguments>]" << std::endl;
if (command) {
std::cout << std::endl
<< command->GetDescription() << std::endl;
}
}
if (vm.count("version")) {
std::cout << "Copyright (c) 2012-2016 Icinga Development Team (https://www.icinga.org/)" << std::endl
<< "License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl2.html>" << std::endl
<< "This is free software: you are free to change and redistribute it." << std::endl
<< "There is NO WARRANTY, to the extent permitted by law.";
}
std::cout << std::endl;
if (vm.count("version")) {
std::cout << std::endl;
Application::DisplayInfoMessage(std::cout, true);
return EXIT_SUCCESS;
}
}
if (!command || vm.count("help")) {
if (!command)
CLICommand::ShowCommands(argc, argv, NULL);
std::cout << visibleDesc << std::endl
<< "Report bugs at <https://dev.icinga.org/>" << std::endl
<< "Icinga home page: <https://www.icinga.org/>" << std::endl;
return EXIT_SUCCESS;
}
}
int rc = 1;
if (autocomplete) {
CLICommand::ShowCommands(argc, argv, &visibleDesc, &hiddenDesc,
&GlobalArgumentCompletion, true, autoindex);
rc = 0;
} else if (command) {
Logger::DisableTimestamp(true);
#ifndef _WIN32
if (command->GetImpersonationLevel() == ImpersonateRoot) {
if (getuid() != 0) {
Log(LogCritical, "cli", "This command must be run as root.");
return 0;
}
} else if (command && command->GetImpersonationLevel() == ImpersonateIcinga) {
String group = Application::GetRunAsGroup();
String user = Application::GetRunAsUser();
errno = 0;
struct group *gr = getgrnam(group.CStr());
if (!gr) {
if (errno == 0) {
Log(LogCritical, "cli")
<< "Invalid group specified: " << group;
return EXIT_FAILURE;
} else {
Log(LogCritical, "cli")
<< "getgrnam() failed with error code " << errno << ", \"" << Utility::FormatErrorNumber(errno) << "\"";
return EXIT_FAILURE;
}
}
if (getgid() != gr->gr_gid) {
if (!vm.count("reload-internal") && setgroups(0, NULL) < 0) {
Log(LogCritical, "cli")
<< "setgroups() failed with error code " << errno << ", \"" << Utility::FormatErrorNumber(errno) << "\"";
Log(LogCritical, "cli")
<< "Please re-run this command as a privileged user or using the \"" << user << "\" account.";
return EXIT_FAILURE;
}
if (setgid(gr->gr_gid) < 0) {
Log(LogCritical, "cli")
<< "setgid() failed with error code " << errno << ", \"" << Utility::FormatErrorNumber(errno) << "\"";
return EXIT_FAILURE;
}
}
errno = 0;
struct passwd *pw = getpwnam(user.CStr());
if (!pw) {
if (errno == 0) {
Log(LogCritical, "cli")
<< "Invalid user specified: " << user;
return EXIT_FAILURE;
} else {
Log(LogCritical, "cli")
<< "getpwnam() failed with error code " << errno << ", \"" << Utility::FormatErrorNumber(errno) << "\"";
return EXIT_FAILURE;
}
}
// also activate the additional groups the configured user is member of
if (getuid() != pw->pw_uid) {
if (!vm.count("reload-internal") && initgroups(user.CStr(), pw->pw_gid) < 0) {
Log(LogCritical, "cli")
<< "initgroups() failed with error code " << errno << ", \"" << Utility::FormatErrorNumber(errno) << "\"";
Log(LogCritical, "cli")
<< "Please re-run this command as a privileged user or using the \"" << user << "\" account.";
return EXIT_FAILURE;
}
if (setuid(pw->pw_uid) < 0) {
Log(LogCritical, "cli")
<< "setuid() failed with error code " << errno << ", \"" << Utility::FormatErrorNumber(errno) << "\"";
Log(LogCritical, "cli")
<< "Please re-run this command as a privileged user or using the \"" << user << "\" account.";
return EXIT_FAILURE;
}
}
}
#endif /* _WIN32 */
std::vector<std::string> args;
if (vm.count("arg"))
args = vm["arg"].as<std::vector<std::string> >();
if (args.size() < command->GetMinArguments()) {
Log(LogCritical, "cli")
<< "Too few arguments. Command needs at least " << command->GetMinArguments()
<< " argument" << (command->GetMinArguments() != 1 ? "s" : "") << ".";
return EXIT_FAILURE;
}
if (command->GetMaxArguments() >= 0 && args.size() > command->GetMaxArguments()) {
Log(LogCritical, "cli")
<< "Too many arguments. At most " << command->GetMaxArguments()
<< " argument" << (command->GetMaxArguments() != 1 ? "s" : "") << " may be specified.";
return EXIT_FAILURE;
}
LogSeverity logLevel = Logger::GetConsoleLogSeverity();
Logger::SetConsoleLogSeverity(LogWarning);
if (vm.count("app"))
Loader::LoadExtensionLibrary(vm["app"].as<std::string>());
else
Loader::LoadExtensionLibrary("icinga");
Logger::SetConsoleLogSeverity(logLevel);
rc = command->Run(vm, args);
}
return rc;
}
#ifdef _WIN32
static int SetupService(bool install, int argc, char **argv)
{
SC_HANDLE schSCManager = OpenSCManager(
NULL,
NULL,
SC_MANAGER_ALL_ACCESS);
if (NULL == schSCManager) {
printf("OpenSCManager failed (%d)\n", GetLastError());
return 1;
}
TCHAR szPath[MAX_PATH];
if (!GetModuleFileName(NULL, szPath, MAX_PATH)) {
printf("Cannot install service (%d)\n", GetLastError());
return 1;
}
String szArgs;
szArgs = Utility::EscapeShellArg(szPath) + " --scm";
for (int i = 0; i < argc; i++)
szArgs += " " + Utility::EscapeShellArg(argv[i]);
SC_HANDLE schService = OpenService(schSCManager, "icinga2", SERVICE_ALL_ACCESS);
if (schService != NULL) {
SERVICE_STATUS status;
ControlService(schService, SERVICE_CONTROL_STOP, &status);
double start = Utility::GetTime();
while (status.dwCurrentState != SERVICE_STOPPED) {
double end = Utility::GetTime();
if (end - start > 30) {
printf("Could not stop the service.\n");
break;
}
Utility::Sleep(5);
if (!QueryServiceStatus(schService, &status)) {
printf("QueryServiceStatus failed (%d)\n", GetLastError());
return 1;
}
}
} else if (install) {
schService = CreateService(
schSCManager,
"icinga2",
"Icinga 2",
SERVICE_ALL_ACCESS,
SERVICE_WIN32_OWN_PROCESS,
SERVICE_DEMAND_START,
SERVICE_ERROR_NORMAL,
szArgs.CStr(),
NULL,
NULL,
NULL,
"NT AUTHORITY\\NetworkService",
NULL);
if (schService == NULL) {
printf("CreateService failed (%d)\n", GetLastError());
CloseServiceHandle(schSCManager);
return 1;
}
} else {
printf("Service isn't installed.\n");
CloseServiceHandle(schSCManager);
return 0;
}
if (!install) {
if (!DeleteService(schService)) {
printf("DeleteService failed (%d)\n", GetLastError());
CloseServiceHandle(schService);
CloseServiceHandle(schSCManager);
return 1;
}
printf("Service uninstalled successfully\n");
} else {
ChangeServiceConfig(schService, SERVICE_NO_CHANGE, SERVICE_AUTO_START,
SERVICE_ERROR_NORMAL, szArgs.CStr(), NULL, NULL, NULL, NULL, NULL, NULL);
SERVICE_DESCRIPTION sdDescription = { "The Icinga 2 monitoring application" };
ChangeServiceConfig2(schService, SERVICE_CONFIG_DESCRIPTION, &sdDescription);
if (!StartService(schService, 0, NULL)) {
printf("StartService failed (%d)\n", GetLastError());
CloseServiceHandle(schService);
CloseServiceHandle(schSCManager);
return 1;
}
printf("Service installed successfully\n");
}
CloseServiceHandle(schService);
CloseServiceHandle(schSCManager);
return 0;
}
VOID ReportSvcStatus(DWORD dwCurrentState,
DWORD dwWin32ExitCode,
DWORD dwWaitHint)
{
static DWORD dwCheckPoint = 1;
l_SvcStatus.dwCurrentState = dwCurrentState;
l_SvcStatus.dwWin32ExitCode = dwWin32ExitCode;
l_SvcStatus.dwWaitHint = dwWaitHint;
if (dwCurrentState == SERVICE_START_PENDING)
l_SvcStatus.dwControlsAccepted = 0;
else
l_SvcStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP;
if ((dwCurrentState == SERVICE_RUNNING) ||
(dwCurrentState == SERVICE_STOPPED))
l_SvcStatus.dwCheckPoint = 0;
else
l_SvcStatus.dwCheckPoint = dwCheckPoint++;
SetServiceStatus(l_SvcStatusHandle, &l_SvcStatus);
}
VOID WINAPI ServiceControlHandler(DWORD dwCtrl)
{
if (dwCtrl == SERVICE_CONTROL_STOP) {
ReportSvcStatus(SERVICE_STOP_PENDING, NO_ERROR, 0);
TerminateJobObject(l_Job, 0);
}
}
VOID WINAPI ServiceMain(DWORD argc, LPSTR *argv)
{
l_SvcStatusHandle = RegisterServiceCtrlHandler(
"icinga2",
ServiceControlHandler);
l_SvcStatus.dwServiceType = SERVICE_WIN32_OWN_PROCESS;
l_SvcStatus.dwServiceSpecificExitCode = 0;
ReportSvcStatus(SERVICE_RUNNING, NO_ERROR, 0);
l_Job = CreateJobObject(NULL, NULL);
for (;;) {
LPSTR arg = argv[0];
String args;
int uargc = Application::GetArgC();
char **uargv = Application::GetArgV();
args += Utility::EscapeShellArg(Application::GetExePath(uargv[0]));
for (int i = 2; i < uargc && uargv[i]; i++) {
if (args != "")
args += " ";
args += Utility::EscapeShellArg(uargv[i]);
}
STARTUPINFO si = { sizeof(si) };
PROCESS_INFORMATION pi;
char *uargs = strdup(args.CStr());
BOOL res = CreateProcess(NULL, uargs, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi);
free(uargs);
if (!res)
break;
CloseHandle(pi.hThread);
AssignProcessToJobObject(l_Job, pi.hProcess);
if (WaitForSingleObject(pi.hProcess, INFINITE) != WAIT_OBJECT_0)
break;
DWORD exitStatus;
if (!GetExitCodeProcess(pi.hProcess, &exitStatus))
break;
if (exitStatus != 7)
break;
}
TerminateJobObject(l_Job, 0);
CloseHandle(l_Job);
ReportSvcStatus(SERVICE_STOPPED, NO_ERROR, 0);
Application::Exit(0);
}
#endif /* _WIN32 */
/**
* Entry point for the Icinga application.
*
* @params argc Number of command line arguments.
* @params argv Command line arguments.
* @returns The application's exit status.
*/
int main(int argc, char **argv)
{
#ifndef _WIN32
rlimit rl;
if (getrlimit(RLIMIT_NOFILE, &rl) >= 0) {
rlim_t maxfds = rl.rlim_max;
if (maxfds == RLIM_INFINITY)
maxfds = 65536;
for (rlim_t i = 3; i < maxfds; i++) {
int rc = close(i);
#ifdef I2_DEBUG
if (rc >= 0)
std::cerr << "Closed FD " << i << " which we inherited from our parent process." << std::endl;
#endif /* I2_DEBUG */
}
}
#endif /* _WIN32 */
/* must be called before using any other libbase functions */
Application::InitializeBase();
/* Set command-line arguments. */
Application::SetArgC(argc);
Application::SetArgV(argv);
#ifdef _WIN32
if (argc > 1 && strcmp(argv[1], "--scm-install") == 0) {
return SetupService(true, argc - 2, &argv[2]);
}
if (argc > 1 && strcmp(argv[1], "--scm-uninstall") == 0) {
return SetupService(false, argc - 2, &argv[2]);
}
if (argc > 1 && strcmp(argv[1], "--scm") == 0) {
SERVICE_TABLE_ENTRY dispatchTable[] = {
{ "icinga2", ServiceMain },
{ NULL, NULL }
};
StartServiceCtrlDispatcher(dispatchTable);
Application::Exit(EXIT_FAILURE);
}
#endif /* _WIN32 */
int rc = Main();
Application::Exit(rc);
}
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