mirror of
https://github.com/matrix-construct/construct
synced 2024-08-19 16:14:43 +02:00
329 lines
8 KiB
C++
329 lines
8 KiB
C++
/*
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* Copyright (C) 2016 Charybdis Development Team
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice is present in all copies.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <ircd/ircd.h>
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#include <ircd/asio.h>
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#include <RB_INC_SYS_RESOURCE_H
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#include "lgetopt.h"
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#include "charybdis.h"
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namespace fs = ircd::fs;
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static void sigfd_handler(const boost::system::error_code &, int) noexcept;
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static bool startup_checks();
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static void enable_coredumps();
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static void print_version();
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const char *const fatalerrstr
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{R"(
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***
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*** A fatal error has occurred. Please contact the developer with the message below.
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*** Create a coredump by reproducing the error using the -debug command-line option.
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***
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%s
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)"};
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const char *const usererrstr
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{R"(
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***
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*** A fatal startup error has occurred. Please fix the problem to continue. ***
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***
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%s
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)"};
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bool printversion;
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bool testing_conf;
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bool cmdline;
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const char *configfile;
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const char *execute;
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lgetopt opts[] =
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{
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{ "help", nullptr, lgetopt::USAGE, "Print this text" },
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{ "version", &printversion, lgetopt::BOOL, "Print version and exit" },
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{ "configfile", &configfile, lgetopt::STRING, "File to use for ircd.conf" },
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{ "conftest", &testing_conf, lgetopt::YESNO, "Test the configuration files and exit" },
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{ "debug", &ircd::debugmode, lgetopt::BOOL, "Enable options for debugging" },
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{ "console", &cmdline, lgetopt::BOOL, "Drop to a command line immediately after startup" },
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{ "execute", &execute, lgetopt::STRING, "Execute command lines immediately after startup" },
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{ nullptr, nullptr, lgetopt::STRING, nullptr },
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};
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std::unique_ptr<boost::asio::io_context> ios
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{
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// Having trouble with static destruction in clang so this
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// has to become still-reachable
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std::make_unique<boost::asio::io_context>()
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};
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boost::asio::signal_set sigs
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{
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*ios
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};
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// TODO: XXX: This has to be declared first before any modules
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// are loaded otherwise the module will not be unloadable.
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boost::asio::ip::tcp::acceptor _dummy_acceptor_ { *ios };
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boost::asio::ip::tcp::socket _dummy_sock_ { *ios };
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boost::asio::ip::tcp::resolver _dummy_resolver_ { *ios };
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int main(int argc, char *const *argv)
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try
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{
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umask(077); // better safe than sorry --SRB
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parseargs(&argc, &argv, opts);
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if(!startup_checks())
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return 1;
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// cores are not dumped without consent of the user to maintain the privacy
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// of cryptographic key material in memory at the time of the crash.
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if(RB_DEBUG_LEVEL || ircd::debugmode)
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enable_coredumps();
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if(printversion)
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{
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print_version();
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return 0;
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}
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// Determine the configuration file from either the user's command line
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// argument or fall back to the default.
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const std::string confpath
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{
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configfile?: fs::get(fs::IRCD_CONF)
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};
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// Associates libircd with our io_context and posts the initial routines
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// to that io_context. Execution of IRCd will then occur during ios::run()
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ircd::init(*ios, confpath);
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// libircd does no signal handling (or at least none that you ever have to
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// care about); reaction to all signals happens out here instead. Handling
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// is done properly through the io_context which registers the handler for
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// the platform and then safely posts the received signal to the io_context
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// event loop. This means we lose the true instant hardware-interrupt gratitude
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// of signals but with the benefit of unconditional safety and cross-
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// platformness with windows etc.
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sigs.add(SIGHUP);
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sigs.add(SIGINT);
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sigs.add(SIGTSTP);
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sigs.add(SIGQUIT);
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sigs.add(SIGTERM);
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sigs.async_wait(sigfd_handler);
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// Because we registered signal handlers with the io_context, ios->run()
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// is now shared between those handlers and libircd. This means the run()
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// won't return even if we call ircd::stop(). We use the callback to then
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// cancel the handlers so run() can return and the program can exit.
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ircd::runlevel_changed = [](const enum ircd::runlevel &mode)
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{
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switch(mode)
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{
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case ircd::runlevel::HALT:
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case ircd::runlevel::FAULT:
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sigs.cancel();
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break;
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default:
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break;
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}
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};
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// If the user wants to immediately drop to a command line without having to
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// send a ctrl-c for it, that is provided here.
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if(cmdline)
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console_spawn();
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if(execute)
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console_execute({execute});
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// Execution.
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// Blocks until a clean exit from a stop() or an exception comes out of it.
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ios->run();
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}
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catch(const ircd::user_error &e)
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{
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if(ircd::debugmode)
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throw;
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fprintf(stderr, usererrstr, e.what());
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return EXIT_FAILURE;
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}
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catch(const std::exception &e)
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{
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if(ircd::debugmode)
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throw;
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/*
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* Why EXIT_FAILURE here?
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* Because if ircd_die_cb() is called it's because of a fatal
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* error inside libcharybdis, and we don't know how to handle the
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* exception, so it is logical to return a FAILURE exit code here.
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* --nenolod
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*
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* left the comment but the code is gone -jzk
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*/
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fprintf(stderr, fatalerrstr, e.what());
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return EXIT_FAILURE;
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}
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void print_version()
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{
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printf("VERSION :%s\n",
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ircd::info::version.c_str());
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#ifdef CUSTOM_BRANDING
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printf("VERSION :based on %s-%s\n",
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PACKAGE_NAME,
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PACKAGE_VERSION);
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#endif
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printf("VERSION :boost %d\n", BOOST_VERSION);
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printf("VERSION :RocksDB %s\n", ircd::db::version);
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}
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bool startup_checks()
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try
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{
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#ifndef _WIN32
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if(geteuid() == 0)
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throw ircd::error("Don't run ircd as root!!!");
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#endif
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fs::chdir(fs::get(fs::PREFIX));
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return true;
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}
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catch(const std::exception &e)
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{
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fprintf(stderr, usererrstr, e.what());
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return false;
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}
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void
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#ifdef HAVE_SYS_RESOURCE_H
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enable_coredumps()
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try
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{
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//
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// Setup corefile size immediately after boot -kre
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//
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rlimit rlim; // resource limits
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ircd::syscall(getrlimit, RLIMIT_CORE, &rlim);
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// Set corefilesize to maximum
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rlim.rlim_cur = rlim.rlim_max;
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ircd::syscall(setrlimit, RLIMIT_CORE, &rlim);
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}
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catch(const std::exception &e)
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{
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std::cerr << "Failed to adjust rlimit: " << e.what() << std::endl;
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}
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#else
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enable_coredumps()
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{
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}
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#endif
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static void handle_quit();
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static void handle_interruption();
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static void handle_termstop();
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static void handle_hangup();
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void
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sigfd_handler(const boost::system::error_code &ec,
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int signum)
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noexcept
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{
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switch(ec.value())
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{
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using namespace boost::system::errc;
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case success:
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break;
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case operation_canceled:
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console_cancel();
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return;
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default:
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console_cancel();
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throw std::runtime_error(ec.message());
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}
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switch(signum)
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{
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case SIGINT: handle_interruption(); break;
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case SIGTSTP: handle_termstop(); break;
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case SIGHUP: handle_hangup(); break;
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case SIGQUIT: handle_quit(); return;
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case SIGTERM: handle_quit(); return;
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default: break;
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}
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sigs.async_wait(sigfd_handler);
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}
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void
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handle_quit()
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try
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{
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console_cancel();
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ircd::quit();
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}
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catch(const std::exception &e)
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{
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ircd::log::error("SIGQUIT handler: %s", e.what());
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}
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void
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handle_hangup()
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try
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{
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console_hangup();
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}
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catch(const std::exception &e)
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{
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ircd::log::error("SIGHUP handler: %s", e.what());
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}
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void
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handle_termstop()
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try
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{
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console_termstop();
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}
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catch(const std::exception &e)
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{
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ircd::log::error("SIGTSTP handler: %s", e.what());
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}
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void
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handle_interruption()
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try
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{
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console_cancel();
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console_spawn();
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}
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catch(const std::exception &e)
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{
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ircd::log::error("SIGINT handler: %s", e.what());
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}
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