bitcoind.cpp
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	// Copyright (c) 2009-2010 Satoshi Nakamoto
	// Copyright (c) 2009-2018 The Bitcoin Core developers
	// Distributed under the MIT software license, see the accompanying
	// file COPYING or http://www.opensource.org/licenses/mit-license.php.

	#if defined(HAVE_CONFIG_H)
	#include <config/bitcoin-config.h>
	#endif

	#include <chainparams.h>
	#include <clientversion.h>
	#include <compat.h>
	#include <config.h>
	#include <fs.h>
	#include <httprpc.h>
	#include <httpserver.h>
	#include <init.h>
	#include <interfaces/chain.h>
	#include <noui.h>
	#include <rpc/server.h>
	#include <shutdown.h>
	#include <util/strencodings.h>
	#include <util/system.h>
	#include <walletinitinterface.h>

	#include <cstdio>

	const std::function<std::string(const char *)> G_TRANSLATION_FUN = nullptr;

	/* Introduction text for doxygen: */

	/*! \mainpage Developer documentation
	*
	* \section intro_sec Introduction
	*
	* This is the developer documentation of Bitcoin ABC
	* (https://www.bitcoinabc.org/). Bitcoin ABC is a client for the digital
	* currency called Bitcoin Cash (https://www.bitcoincash.org/), which enables
	* instant payments to anyone, anywhere in the world. Bitcoin Cash uses
	* peer-to-peer technology to operate with no central authority: managing
	* transactions and issuing money are carried out collectively by the network.
	*
	* The software is a community-driven open source project, released under the
	* MIT license.
	*
	* \section Navigation
	* Use the buttons <code>Namespaces</code>, <code>Classes</code> or
	* <code>Files</code> at the top of the page to start navigating the code.
	*/

	static void WaitForShutdown() {
	while (!ShutdownRequested()) {
	MilliSleep(200);
	}
	Interrupt();
	}

	//////////////////////////////////////////////////////////////////////////////
	//
	// Start
	//
	static bool AppInit(int argc, char *argv[]) {
	// FIXME: Ideally, we'd like to build the config here, but that's currently
	// not possible as the whole application has too many global state. However,
	// this is a first step.
	auto &config = const_cast<Config &>(GetConfig());
	RPCServer rpcServer;
	HTTPRPCRequestProcessor httpRPCRequestProcessor(config, rpcServer);

	InitInterfaces interfaces;
	interfaces.chain = interfaces::MakeChain();

	bool fRet = false;

	//
	// Parameters
	//
	// If Qt is used, parameters/bitcoin.conf are parsed in qt/bitcoin.cpp's
	// main()
	SetupServerArgs();
	std::string error;
	if (!gArgs.ParseParameters(argc, argv, error)) {
	fprintf(stderr, "Error parsing command line arguments: %s\n",
	error.c_str());
	return false;
	}

	// Process help and version before taking care about datadir
	if (HelpRequested(gArgs) \|\| gArgs.IsArgSet("-version")) {
	std::string strUsage =
	PACKAGE_NAME " Daemon version " + FormatFullVersion() + "\n";

	if (gArgs.IsArgSet("-version")) {
	strUsage += FormatParagraph(LicenseInfo());
	} else {
	strUsage += "\nUsage: bitcoind [options] "
	"Start " PACKAGE_NAME " Daemon\n";

	strUsage += "\n" + gArgs.GetHelpMessage();
	}

	fprintf(stdout, "%s", strUsage.c_str());
	return true;
	}

	try {
	if (!fs::is_directory(GetDataDir(false))) {
	fprintf(stderr,
	"Error: Specified data directory \"%s\" does not exist.\n",
	gArgs.GetArg("-datadir", "").c_str());
	return false;
	}
	if (!gArgs.ReadConfigFiles(error)) {
	fprintf(stderr, "Error reading configuration file: %s\n",
	error.c_str());
	return false;
	}
	// Check for -testnet or -regtest parameter (Params() calls are only
	// valid after this clause)
	try {
	SelectParams(gArgs.GetChainName());
	} catch (const std::exception &e) {
	fprintf(stderr, "Error: %s\n", e.what());
	return false;
	}

	// Make sure we create the net-specific data directory early on: if it
	// is new, this has a side effect of also creating
	// <datadir>/<net>/wallets/.
	//
	// TODO: this should be removed once GetDataDir() no longer creates the
	// wallets/ subdirectory.
	// See more info at:
	// https://reviews.bitcoinabc.org/D3312
	GetDataDir(true);

	// Error out when loose non-argument tokens are encountered on command
	// line
	for (int i = 1; i < argc; i++) {
	if (!IsSwitchChar(argv[i][0])) {
	fprintf(stderr,
	"Error: Command line contains unexpected token '%s', "
	"see bitcoind -h for a list of options.\n",
	argv[i]);
	return false;
	}
	}

	// -server defaults to true for bitcoind but not for the GUI so do this
	// here
	gArgs.SoftSetBoolArg("-server", true);
	// Set this early so that parameter interactions go to console
	InitLogging();
	InitParameterInteraction();
	if (!AppInitBasicSetup()) {
	// InitError will have been called with detailed error, which ends
	// up on console
	return false;
	}
	if (!AppInitParameterInteraction(config)) {
	// InitError will have been called with detailed error, which ends
	// up on console
	return false;
	}
	if (!AppInitSanityChecks()) {
	// InitError will have been called with detailed error, which ends
	// up on console
	return false;
	}
	if (gArgs.GetBoolArg("-daemon", false)) {
	#if HAVE_DECL_DAEMON
	#if defined(MAC_OSX)
	#pragma GCC diagnostic push
	#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
	#endif
	fprintf(stdout, "Bitcoin server starting\n");

	// Daemonize
	if (daemon(1, 0)) {
	// don't chdir (1), do close FDs (0)
	fprintf(stderr, "Error: daemon() failed: %s\n",
	strerror(errno));
	return false;
	}
	#if defined(MAC_OSX)
	#pragma GCC diagnostic pop
	#endif
	#else
	fprintf(
	stderr,
	"Error: -daemon is not supported on this operating system\n");
	return false;
	#endif // HAVE_DECL_DAEMON
	}

	// Lock data directory after daemonization
	if (!AppInitLockDataDirectory()) {
	// If locking the data directory failed, exit immediately
	return false;
	}
	fRet =
	AppInitMain(config, rpcServer, httpRPCRequestProcessor, interfaces);
	} catch (const std::exception &e) {
	PrintExceptionContinue(&e, "AppInit()");
	} catch (...) {
	PrintExceptionContinue(nullptr, "AppInit()");
	}

	if (!fRet) {
	Interrupt();
	} else {
	WaitForShutdown();
	}
	Shutdown(interfaces);

	return fRet;
	}

	int main(int argc, char *argv[]) {
	#ifdef WIN32
	util::WinCmdLineArgs winArgs;
	std::tie(argc, argv) = winArgs.get();
	#endif
	SetupEnvironment();

	// Connect bitcoind signal handlers
	noui_connect();

	return (AppInit(argc, argv) ? EXIT_SUCCESS : EXIT_FAILURE);
	}

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