mirror of https://github.com/Icinga/icinga2.git
513 lines
13 KiB
C++
513 lines
13 KiB
C++
/******************************************************************************
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* Icinga 2 *
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* Copyright (C) 2012-2017 Icinga Development Team (https://www.icinga.com/) *
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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 "cli/consolecommand.hpp"
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#include "config/configcompiler.hpp"
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#include "remote/apiclient.hpp"
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#include "remote/consolehandler.hpp"
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#include "remote/url.hpp"
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#include "base/configwriter.hpp"
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#include "base/serializer.hpp"
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#include "base/json.hpp"
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#include "base/console.hpp"
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#include "base/application.hpp"
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#include "base/objectlock.hpp"
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#include "base/unixsocket.hpp"
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#include "base/utility.hpp"
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#include "base/networkstream.hpp"
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#include "base/exception.hpp"
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#include <iostream>
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#ifdef HAVE_EDITLINE
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#include "cli/editline.hpp"
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#endif /* HAVE_EDITLINE */
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using namespace icinga;
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namespace po = boost::program_options;
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static ScriptFrame *l_ScriptFrame;
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static ApiClient::Ptr l_ApiClient;
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static String l_Session;
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REGISTER_CLICOMMAND("console", ConsoleCommand);
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INITIALIZE_ONCE(&ConsoleCommand::StaticInitialize);
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extern "C" void dbg_spawn_console(void)
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{
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ScriptFrame frame;
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ConsoleCommand::RunScriptConsole(frame);
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}
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extern "C" void dbg_inspect_value(const Value& value)
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{
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ConfigWriter::EmitValue(std::cout, 1, Serialize(value, 0));
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std::cout << std::endl;
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}
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extern "C" void dbg_inspect_object(Object *obj)
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{
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Object::Ptr objr = obj;
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dbg_inspect_value(objr);
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}
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extern "C" void dbg_eval(const char *text)
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{
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Expression *expr = NULL;
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try {
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ScriptFrame frame;
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expr = ConfigCompiler::CompileText("<dbg>", text);
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Value result = Serialize(expr->Evaluate(frame), 0);
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dbg_inspect_value(result);
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} catch (const std::exception& ex) {
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std::cout << "Error: " << DiagnosticInformation(ex) << "\n";
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}
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delete expr;
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}
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void ConsoleCommand::BreakpointHandler(ScriptFrame& frame, ScriptError *ex, const DebugInfo& di)
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{
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static boost::mutex mutex;
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boost::mutex::scoped_lock lock(mutex);
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if (!Application::GetScriptDebuggerEnabled())
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return;
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if (ex && ex->IsHandledByDebugger())
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return;
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std::cout << "Breakpoint encountered.\n";
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if (ex) {
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std::cout << "Exception: " << DiagnosticInformation(*ex) << "\n";
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ex->SetHandledByDebugger(true);
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} else
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ShowCodeLocation(std::cout, di);
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std::cout << "You can inspect expressions (such as variables) by entering them at the prompt.\n"
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<< "To leave the debugger and continue the program use \"$continue\".\n";
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#ifdef HAVE_EDITLINE
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rl_completion_entry_function = ConsoleCommand::ConsoleCompleteHelper;
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rl_completion_append_character = '\0';
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#endif /* HAVE_EDITLINE */
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ConsoleCommand::RunScriptConsole(frame);
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}
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void ConsoleCommand::StaticInitialize(void)
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{
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Expression::OnBreakpoint.connect(&ConsoleCommand::BreakpointHandler);
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}
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String ConsoleCommand::GetDescription(void) const
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{
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return "Interprets Icinga script expressions.";
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}
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String ConsoleCommand::GetShortDescription(void) const
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{
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return "Icinga console";
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}
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ImpersonationLevel ConsoleCommand::GetImpersonationLevel(void) const
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{
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return ImpersonateNone;
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}
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void ConsoleCommand::InitParameters(boost::program_options::options_description& visibleDesc,
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boost::program_options::options_description& hiddenDesc) const
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{
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visibleDesc.add_options()
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("connect,c", po::value<std::string>(), "connect to an Icinga 2 instance")
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("eval,e", po::value<std::string>(), "evaluate expression and terminate")
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("file,r", po::value<std::string>(), "evaluate a file and terminate")
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("syntax-only", "only validate syntax (requires --eval or --file)")
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("sandbox", "enable sandbox mode")
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;
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}
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#ifdef HAVE_EDITLINE
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char *ConsoleCommand::ConsoleCompleteHelper(const char *word, int state)
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{
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static std::vector<String> matches;
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if (state == 0) {
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if (!l_ApiClient)
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matches = ConsoleHandler::GetAutocompletionSuggestions(word, *l_ScriptFrame);
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else {
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boost::mutex mutex;
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boost::condition_variable cv;
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bool ready = false;
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Array::Ptr suggestions;
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l_ApiClient->AutocompleteScript(l_Session, word, l_ScriptFrame->Sandboxed,
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boost::bind(&ConsoleCommand::AutocompleteScriptCompletionHandler,
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boost::ref(mutex), boost::ref(cv), boost::ref(ready),
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_1, _2,
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boost::ref(suggestions)));
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{
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boost::mutex::scoped_lock lock(mutex);
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while (!ready)
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cv.wait(lock);
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}
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matches.clear();
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ObjectLock olock(suggestions);
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std::copy(suggestions->Begin(), suggestions->End(), std::back_inserter(matches));
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}
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}
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if (state >= static_cast<int>(matches.size()))
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return NULL;
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return strdup(matches[state].CStr());
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}
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#endif /* HAVE_EDITLINE */
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/**
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* The entry point for the "console" CLI command.
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*
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* @returns An exit status.
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*/
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int ConsoleCommand::Run(const po::variables_map& vm, const std::vector<std::string>& ap) const
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{
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#ifdef HAVE_EDITLINE
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rl_completion_entry_function = ConsoleCommand::ConsoleCompleteHelper;
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rl_completion_append_character = '\0';
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#endif /* HAVE_EDITLINE */
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String addr, session;
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ScriptFrame scriptFrame;
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session = Utility::NewUniqueID();
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if (vm.count("sandbox"))
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scriptFrame.Sandboxed = true;
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scriptFrame.Self = scriptFrame.Locals;
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if (!vm.count("eval") && !vm.count("file"))
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std::cout << "Icinga 2 (version: " << Application::GetAppVersion() << ")\n";
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const char *addrEnv = getenv("ICINGA2_API_URL");
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if (addrEnv)
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addr = addrEnv;
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if (vm.count("connect"))
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addr = vm["connect"].as<std::string>();
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String command;
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bool syntaxOnly = false;
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if (vm.count("syntax-only")) {
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if (vm.count("eval") || vm.count("file"))
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syntaxOnly = true;
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else {
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std::cerr << "The option --syntax-only can only be used in combination with --eval or --file." << std::endl;
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return EXIT_FAILURE;
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}
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}
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if (vm.count("eval"))
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command = vm["eval"].as<std::string>();
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else if (vm.count("file")) {
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std::string fname = vm["file"].as<std::string>();
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try {
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std::ifstream fp(fname.c_str());
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fp.exceptions(std::ifstream::failbit | std::ifstream::badbit);
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command = String(std::istreambuf_iterator<char>(fp), std::istreambuf_iterator<char>());
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} catch (const std::exception&) {
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std::cerr << "Could not read file '" << fname << "'." << std::endl;
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return EXIT_FAILURE;
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}
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}
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return RunScriptConsole(scriptFrame, addr, session, command, syntaxOnly);
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}
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int ConsoleCommand::RunScriptConsole(ScriptFrame& scriptFrame, const String& addr, const String& session, const String& commandOnce, bool syntaxOnly)
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{
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std::map<String, String> lines;
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int next_line = 1;
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#ifdef HAVE_EDITLINE
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String homeEnv = getenv("HOME");
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String historyPath = homeEnv + "/.icinga2_history";
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std::fstream historyfp;
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historyfp.open(historyPath.CStr(), std::fstream::in);
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String line;
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while (std::getline(historyfp, line.GetData()))
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add_history(line.CStr());
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historyfp.close();
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#endif /* HAVE_EDITLINE */
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l_ScriptFrame = &scriptFrame;
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l_Session = session;
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if (!addr.IsEmpty()) {
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Url::Ptr url;
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try {
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url = new Url(addr);
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} catch (const std::exception& ex) {
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Log(LogCritical, "ConsoleCommand", ex.what());
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return EXIT_FAILURE;
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}
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const char *usernameEnv = getenv("ICINGA2_API_USERNAME");
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const char *passwordEnv = getenv("ICINGA2_API_PASSWORD");
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if (usernameEnv)
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url->SetUsername(usernameEnv);
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if (passwordEnv)
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url->SetPassword(passwordEnv);
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if (url->GetPort().IsEmpty())
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url->SetPort("5665");
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l_ApiClient = new ApiClient(url->GetHost(), url->GetPort(), url->GetUsername(), url->GetPassword());
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}
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while (std::cin.good()) {
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String fileName = "<" + Convert::ToString(next_line) + ">";
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next_line++;
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bool continuation = false;
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std::string command;
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incomplete:
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std::string line;
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if (commandOnce.IsEmpty()) {
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#ifdef HAVE_EDITLINE
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std::ostringstream promptbuf;
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std::ostream& os = promptbuf;
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#else /* HAVE_EDITLINE */
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std::ostream& os = std::cout;
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#endif /* HAVE_EDITLINE */
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os << fileName;
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if (!continuation)
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os << " => ";
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else
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os << " .. ";
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#ifdef HAVE_EDITLINE
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String prompt = promptbuf.str();
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char *cline;
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cline = readline(prompt.CStr());
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if (!cline)
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break;
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if (commandOnce.IsEmpty() && cline[0] != '\0') {
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add_history(cline);
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historyfp.open(historyPath.CStr(), std::fstream::out | std::fstream::app);
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historyfp << cline << "\n";
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historyfp.close();
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}
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line = cline;
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free(cline);
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#else /* HAVE_EDITLINE */
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std::getline(std::cin, line);
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#endif /* HAVE_EDITLINE */
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} else
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line = commandOnce;
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if (!line.empty() && line[0] == '$') {
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if (line == "$continue")
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break;
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std::cout << "Unknown debugger command: " << line << "\n";
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continue;
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}
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if (!command.empty())
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command += "\n";
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command += line;
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Expression *expr = NULL;
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try {
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lines[fileName] = command;
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Value result;
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if (!l_ApiClient) {
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expr = ConfigCompiler::CompileText(fileName, command);
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/* This relies on the fact that - for syntax errors - CompileText()
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* returns an AST where the top-level expression is a 'throw'. */
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if (!syntaxOnly || dynamic_cast<ThrowExpression *>(expr)) {
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if (syntaxOnly)
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std::cerr << " => " << command << std::endl;
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result = Serialize(expr->Evaluate(scriptFrame), 0);
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} else
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result = true;
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} else {
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boost::mutex mutex;
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boost::condition_variable cv;
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bool ready = false;
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boost::exception_ptr eptr;
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l_ApiClient->ExecuteScript(l_Session, command, scriptFrame.Sandboxed,
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boost::bind(&ConsoleCommand::ExecuteScriptCompletionHandler,
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boost::ref(mutex), boost::ref(cv), boost::ref(ready),
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_1, _2,
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boost::ref(result), boost::ref(eptr)));
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{
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boost::mutex::scoped_lock lock(mutex);
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while (!ready)
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cv.wait(lock);
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}
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if (eptr)
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boost::rethrow_exception(eptr);
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}
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if (commandOnce.IsEmpty()) {
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std::cout << ConsoleColorTag(Console_ForegroundCyan);
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ConfigWriter::EmitValue(std::cout, 1, result);
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std::cout << ConsoleColorTag(Console_Normal) << "\n";
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} else {
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std::cout << JsonEncode(result) << "\n";
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break;
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}
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} catch (const ScriptError& ex) {
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if (ex.IsIncompleteExpression() && commandOnce.IsEmpty()) {
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continuation = true;
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goto incomplete;
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}
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DebugInfo di = ex.GetDebugInfo();
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if (lines.find(di.Path) != lines.end()) {
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String text = lines[di.Path];
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std::vector<String> ulines;
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boost::algorithm::split(ulines, text, boost::is_any_of("\n"));
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for (int i = 1; i <= ulines.size(); i++) {
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int start, len;
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if (i == di.FirstLine)
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start = di.FirstColumn;
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else
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start = 0;
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if (i == di.LastLine)
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len = di.LastColumn - di.FirstColumn + 1;
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else
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len = ulines[i - 1].GetLength();
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int offset;
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if (di.Path != fileName) {
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std::cout << di.Path << ": " << ulines[i - 1] << "\n";
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offset = 2;
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} else
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offset = 4;
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if (i >= di.FirstLine && i <= di.LastLine) {
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std::cout << String(di.Path.GetLength() + offset, ' ');
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std::cout << String(start, ' ') << String(len, '^') << "\n";
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}
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}
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} else {
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ShowCodeLocation(std::cout, di);
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}
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std::cout << ex.what() << "\n";
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if (!commandOnce.IsEmpty())
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return EXIT_FAILURE;
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} catch (const std::exception& ex) {
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std::cout << "Error: " << DiagnosticInformation(ex) << "\n";
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if (!commandOnce.IsEmpty())
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return EXIT_FAILURE;
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}
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delete expr;
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}
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return EXIT_SUCCESS;
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}
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void ConsoleCommand::ExecuteScriptCompletionHandler(boost::mutex& mutex, boost::condition_variable& cv,
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bool& ready, boost::exception_ptr eptr, const Value& result, Value& resultOut, boost::exception_ptr& eptrOut)
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{
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if (eptr) {
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try {
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boost::rethrow_exception(eptr);
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} catch (const ScriptError& ex) {
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eptrOut = boost::current_exception();
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} catch (const std::exception& ex) {
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Log(LogCritical, "ConsoleCommand")
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<< "HTTP query failed: " << ex.what();
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Application::Exit(EXIT_FAILURE);
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}
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}
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resultOut = result;
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{
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boost::mutex::scoped_lock lock(mutex);
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ready = true;
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cv.notify_all();
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}
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}
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void ConsoleCommand::AutocompleteScriptCompletionHandler(boost::mutex& mutex, boost::condition_variable& cv,
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bool& ready, boost::exception_ptr eptr, const Array::Ptr& result, Array::Ptr& resultOut)
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{
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if (eptr) {
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try {
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boost::rethrow_exception(eptr);
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} catch (const std::exception& ex) {
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Log(LogCritical, "ConsoleCommand")
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<< "HTTP query failed: " << ex.what();
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Application::Exit(EXIT_FAILURE);
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}
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}
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resultOut = result;
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{
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boost::mutex::scoped_lock lock(mutex);
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ready = true;
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cv.notify_all();
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}
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}
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