mirror of https://github.com/Icinga/icinga2.git
312 lines
8.7 KiB
C++
312 lines
8.7 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012 Icinga Development Team (http://www.icinga.org/) *
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* *
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* This program is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public License *
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* as published by the Free Software Foundation; either version 2 *
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* of the License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the Free Software Foundation *
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
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******************************************************************************/
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#include "config/configcompilercontext.h"
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#include "config/configcompiler.h"
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#include "base/application.h"
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#include "base/logger_fwd.h"
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#include "base/timer.h"
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#include "base/utility.h"
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#include <boost/program_options.hpp>
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#include <boost/tuple/tuple.hpp>
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#include <boost/smart_ptr/make_shared.hpp>
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#include <boost/foreach.hpp>
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#ifndef _WIN32
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# include "icinga-version.h"
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# define ICINGA_VERSION VERSION ", " GIT_MESSAGE
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# include <ltdl.h>
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#endif /* _WIN32 */
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using namespace icinga;
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namespace po = boost::program_options;
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static po::variables_map g_AppParams;
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static bool LoadConfigFiles(bool validateOnly)
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{
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ConfigCompilerContext::GetInstance()->Reset();
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BOOST_FOREACH(const String& configPath, g_AppParams["config"].as<std::vector<String> >()) {
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ConfigCompiler::CompileFile(configPath);
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}
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String name, fragment;
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BOOST_FOREACH(boost::tie(name, fragment), ConfigFragmentRegistry::GetInstance()->GetItems()) {
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ConfigCompiler::CompileText(name, fragment);
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}
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bool hasError = false;
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BOOST_FOREACH(const ConfigCompilerError& error, ConfigCompilerContext::GetInstance()->GetErrors()) {
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if (!error.Warning) {
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hasError = true;
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break;
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}
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}
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/* Don't link or validate if we have already encountered at least one error. */
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if (!hasError) {
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ConfigItem::LinkItems();
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ConfigItem::ValidateItems();
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}
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hasError = false;
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BOOST_FOREACH(const ConfigCompilerError& error, ConfigCompilerContext::GetInstance()->GetErrors()) {
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if (error.Warning) {
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Log(LogWarning, "icinga-app", "Config warning: " + error.Message);
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} else {
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hasError = true;
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Log(LogCritical, "icinga-app", "Config error: " + error.Message);
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}
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}
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if (hasError)
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return false;
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if (validateOnly)
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return true;
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ConfigItem::ActivateItems();
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ConfigItem::DiscardItems();
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ConfigType::DiscardTypes();
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return true;
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}
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static bool Daemonize(const String& stderrFile)
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{
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#ifndef _WIN32
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pid_t pid = fork();
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if (pid == -1) {
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return false;
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}
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if (pid)
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exit(0);
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int fdnull = open("/dev/null", O_RDWR);
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if (fdnull > 0) {
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if (fdnull != 0)
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dup2(fdnull, 0);
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if (fdnull != 1)
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dup2(fdnull, 1);
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if (fdnull > 2)
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close(fdnull);
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}
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const char *errPath = "/dev/null";
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if (!stderrFile.IsEmpty())
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errPath = stderrFile.CStr();
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int fderr = open(errPath, O_WRONLY | O_APPEND);
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if (fderr < 0 && errno == ENOENT)
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fderr = open(errPath, O_CREAT | O_WRONLY | O_APPEND, 0600);
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if (fderr > 0) {
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if (fderr != 2)
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dup2(fderr, 2);
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if (fderr > 2)
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close(fderr);
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}
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pid_t sid = setsid();
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if (sid == -1) {
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return false;
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}
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#endif
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return true;
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}
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/**
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* Entry point for the Icinga application.
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*
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* @params argc Number of command line arguments.
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* @params argv Command line arguments.
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* @returns The application's exit status.
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*/
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int main(int argc, char **argv)
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{
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#ifndef _WIN32
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LTDL_SET_PRELOADED_SYMBOLS();
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#endif /* _WIN32 */
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#ifndef _WIN32
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lt_dlinit();
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#endif /* _WIN32 */
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/* Set thread title. */
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Utility::SetThreadName("Main Thread");
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/* Set command-line arguments. */
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Application::SetArgC(argc);
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Application::SetArgV(argv);
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/* Install exception handlers to make debugging easier. */
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Application::InstallExceptionHandlers();
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#ifdef ICINGA_PREFIX
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Application::SetPrefixDir(ICINGA_PREFIX);
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#endif /* ICINGA_PREFIX */
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#ifdef ICINGA_LOCALSTATEDIR
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Application::SetLocalStateDir(ICINGA_LOCALSTATEDIR);
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#endif /* ICINGA_LOCALSTATEDIR */
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#ifdef ICINGA_PKGLIBDIR
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Application::SetPkgLibDir(ICINGA_PKGLIBDIR);
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#endif /* ICINGA_PKGLIBDIR */
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#ifdef ICINGA_PKGDATADIR
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Application::SetPkgDataDir(ICINGA_PKGDATADIR);
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#endif /* ICINGA_PKGDATADIR */
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po::options_description desc("Supported options");
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desc.add_options()
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("help", "show this help message")
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("version,V", "show version information")
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("library,l", po::value<std::vector<String> >(), "load a library")
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("include,I", po::value<std::vector<String> >(), "add include search directory")
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("config,c", po::value<std::vector<String> >(), "parse a configuration file")
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("validate,v", "exit after validating the configuration")
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("debug,x", "enable debugging")
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("daemonize,d", "detach from the controlling terminal")
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("errorlog,e", po::value<String>(), "log fatal errors to the specified log file (only works in combination with --daemonize)")
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;
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try {
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po::store(po::parse_command_line(argc, argv, desc), g_AppParams);
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} catch (const std::exception& ex) {
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std::ostringstream msgbuf;
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msgbuf << "Error while parsing command-line options: " << ex.what();
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Log(LogCritical, "icinga-app", msgbuf.str());
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return EXIT_FAILURE;
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}
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po::notify(g_AppParams);
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if (g_AppParams.count("debug"))
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Application::SetDebugging(true);
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if (g_AppParams.count("help") || g_AppParams.count("version")) {
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String appName = Utility::BaseName(argv[0]);
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if (appName.GetLength() > 3 && appName.SubStr(0, 3) == "lt-")
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appName = appName.SubStr(3, appName.GetLength() - 3);
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std::cout << appName << " " << "- The Icinga 2 networking monitoring daemon.";
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if (g_AppParams.count("version")) {
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#ifndef _WIN32
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std::cout << " (Version: " << ICINGA_VERSION << ")";
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#endif /* _WIN32 */
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std::cout << std::endl
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<< "Copyright (c) 2012-2013 Icinga Development Team (http://www.icinga.org)" << std::endl
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<< "License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl2.html>" << std::endl
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<< "This is free software: you are free to change and redistribute it." << std::endl
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<< "There is NO WARRANTY, to the extent permitted by law.";
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}
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std::cout << std::endl;
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if (g_AppParams.count("version"))
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return EXIT_SUCCESS;
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}
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if (g_AppParams.count("help")) {
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std::cout << std::endl
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<< desc << std::endl
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<< "Report bugs at <https://dev.icinga.org/>" << std::endl
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<< "Icinga home page: <http://www.icinga.org/>" << std::endl;
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return EXIT_SUCCESS;
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}
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Log(LogInformation, "icinga-app", "Icinga application loader"
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#ifndef _WIN32
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" (version: " ICINGA_VERSION ")"
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#endif /* _WIN32 */
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);
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String searchDir = Application::GetPkgLibDir();
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Log(LogInformation, "base", "Adding library search dir: " + searchDir);
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#ifdef _WIN32
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SetDllDirectory(searchDir.CStr());
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#else /* _WIN32 */
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lt_dladdsearchdir(searchDir.CStr());
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#endif /* _WIN32 */
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(void) Utility::LoadExtensionLibrary("icinga");
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if (g_AppParams.count("library")) {
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BOOST_FOREACH(const String& libraryName, g_AppParams["library"].as<std::vector<String> >()) {
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(void) Utility::LoadExtensionLibrary(libraryName);
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}
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}
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ConfigCompiler::AddIncludeSearchDir(Application::GetPkgDataDir());
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if (g_AppParams.count("include")) {
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BOOST_FOREACH(const String& includePath, g_AppParams["include"].as<std::vector<String> >()) {
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ConfigCompiler::AddIncludeSearchDir(includePath);
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}
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}
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if (g_AppParams.count("config") == 0) {
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Log(LogCritical, "icinga-app", "You need to specify at least one config file (using the --config option).");
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return EXIT_FAILURE;
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}
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if (g_AppParams.count("daemonize")) {
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String errorLog;
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if (g_AppParams.count("errorlog"))
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errorLog = g_AppParams["errorlog"].as<String>();
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Daemonize(errorLog);
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}
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bool validateOnly = g_AppParams.count("validate");
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if (!LoadConfigFiles(validateOnly))
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return EXIT_FAILURE;
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if (validateOnly) {
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Log(LogInformation, "icinga-app", "Finished validating the configuration file(s).");
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return EXIT_SUCCESS;
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}
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Application::Ptr app = Application::GetInstance();
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if (!app)
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BOOST_THROW_EXCEPTION(std::runtime_error("Configuration must create an Application object."));
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return app->Run();
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}
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