src/bitcoind.cpp

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Copyright (c) 2009-2016 The Bitcoin Core developers
   3 // Distributed under the MIT software license, see the accompanying
   4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5
   6 #if defined(HAVE_CONFIG_H)
   7 #include "config/bitcoin-config.h"
   8 #endif
   9
  10 #include "chainparams.h"
  11 #include "clientversion.h"
  12 #include "compat.h"
  13 #include "fs.h"
  14 #include "rpc/server.h"
  15 #include "init.h"
  16 #include "noui.h"
  17 #include "scheduler.h"
  18 #include "util.h"
  19 #include "httpserver.h"
  20 #include "httprpc.h"
  21 #include "utilstrencodings.h"
  22
  23 #include <boost/algorithm/string/predicate.hpp>
  24 #include <boost/thread.hpp>
  25
  26 #include <stdio.h>
  27
  28 /* Introduction text for doxygen: */
  29
  30 /*! \mainpage Developer documentation
  31  *
  32  * \section intro_sec Introduction
  33  *
  34  * This is the developer documentation of the reference client for an experimental new digital currency called Bitcoin (https://www.bitcoin.org/),
  35  * which enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate
  36  * with no central authority: managing transactions and issuing money are carried out collectively by the network.
  37  *
  38  * The software is a community-driven open source project, released under the MIT license.
  39  *
  40  * \section Navigation
  41  * Use the buttons <code>Namespaces</code>, <code>Classes</code> or <code>Files</code> at the top of the page to start navigating the code.
  42  */
  43
  44 void WaitForShutdown(boost::thread_group* threadGroup)
  45 {
  46     bool fShutdown = ShutdownRequested();
  47     // Tell the main threads to shutdown.
  48     while (!fShutdown)
  49     {
  50         MilliSleep(200);
  51         fShutdown = ShutdownRequested();
  52     }
  53     if (threadGroup)
  54     {
  55         Interrupt(*threadGroup);
  56         threadGroup->join_all();
  57     }
  58 }
  59
  60 //////////////////////////////////////////////////////////////////////////////
  61 //
  62 // Start
  63 //
  64 bool AppInit(int argc, char* argv[])
  65 {
  66     boost::thread_group threadGroup;
  67     CScheduler scheduler;
  68
  69     bool fRet = false;
  70
  71     //
  72     // Parameters
  73     //
  74     // If Qt is used, parameters/bitcoin.conf are parsed in qt/bitcoin.cpp's main()
  75     ParseParameters(argc, argv);
  76
  77     // Process help and version before taking care about datadir
  78     if (IsArgSet("-?") || IsArgSet("-h") ||  IsArgSet("-help") || IsArgSet("-version"))
  79     {
  80         std::string strUsage = strprintf(_("%s Daemon"), _(PACKAGE_NAME)) + " " + _("version") + " " + FormatFullVersion() + "\n";
  81
  82         if (IsArgSet("-version"))
  83         {
  84             strUsage += FormatParagraph(LicenseInfo());
  85         }
  86         else
  87         {
  88             strUsage += "\n" + _("Usage:") + "\n" +
  89                   "  bitcoind [options]                     " + strprintf(_("Start %s Daemon"), _(PACKAGE_NAME)) + "\n";
  90
  91             strUsage += "\n" + HelpMessage(HMM_BITCOIND);
  92         }
  93
  94         fprintf(stdout, "%s", strUsage.c_str());
  95         return true;
  96     }
  97
  98     try
  99     {
 100         if (!fs::is_directory(GetDataDir(false)))
 101         {
 102             fprintf(stderr, "Error: Specified data directory \"%s\" does not exist.\n", GetArg("-datadir", "").c_str());
 103             return false;
 104         }
 105         try
 106         {
 107             ReadConfigFile(GetArg("-conf", BITCOIN_CONF_FILENAME));
 108         } catch (const std::exception& e) {
 109             fprintf(stderr,"Error reading configuration file: %s\n", e.what());
 110             return false;
 111         }
 112         // Check for -testnet or -regtest parameter (Params() calls are only valid after this clause)
 113         try {
 114             SelectParams(ChainNameFromCommandLine());
 115         } catch (const std::exception& e) {
 116             fprintf(stderr, "Error: %s\n", e.what());
 117             return false;
 118         }
 119
 120         // Command-line RPC
 121         bool fCommandLine = false;
 122         for (int i = 1; i < argc; i++)
 123             if (!IsSwitchChar(argv[i][0]) && !boost::algorithm::istarts_with(argv[i], "bitcoin:"))
 124                 fCommandLine = true;
 125
 126         if (fCommandLine)
 127         {
 128             fprintf(stderr, "Error: There is no RPC client functionality in bitcoind anymore. Use the bitcoin-cli utility instead.\n");
 129             exit(EXIT_FAILURE);
 130         }
 131         // -server defaults to true for bitcoind but not for the GUI so do this here
 132         SoftSetBoolArg("-server", true);
 133         // Set this early so that parameter interactions go to console
 134         InitLogging();
 135         InitParameterInteraction();
 136         if (!AppInitBasicSetup())
 137         {
 138             // InitError will have been called with detailed error, which ends up on console
 139             exit(EXIT_FAILURE);
 140         }
 141         if (!AppInitParameterInteraction())
 142         {
 143             // InitError will have been called with detailed error, which ends up on console
 144             exit(EXIT_FAILURE);
 145         }
 146         if (!AppInitSanityChecks())
 147         {
 148             // InitError will have been called with detailed error, which ends up on console
 149             exit(EXIT_FAILURE);
 150         }
 151         if (GetBoolArg("-daemon", false))
 152         {
 153 #if HAVE_DECL_DAEMON
 154             fprintf(stdout, "Bitcoin server starting\n");
 155
 156             // Daemonize
 157             if (daemon(1, 0)) { // don't chdir (1), do close FDs (0)
 158                 fprintf(stderr, "Error: daemon() failed: %s\n", strerror(errno));
 159                 return false;
 160             }
 161 #else
 162             fprintf(stderr, "Error: -daemon is not supported on this operating system\n");
 163             return false;
 164 #endif // HAVE_DECL_DAEMON
 165         }
 166
 167         fRet = AppInitMain(threadGroup, scheduler);
 168     }
 169     catch (const std::exception& e) {
 170         PrintExceptionContinue(&e, "AppInit()");
 171     } catch (...) {
 172         PrintExceptionContinue(NULL, "AppInit()");
 173     }
 174
 175     if (!fRet)
 176     {
 177         Interrupt(threadGroup);
 178         // threadGroup.join_all(); was left out intentionally here, because we didn't re-test all of
 179         // the startup-failure cases to make sure they don't result in a hang due to some
 180         // thread-blocking-waiting-for-another-thread-during-startup case
 181     } else {
 182         WaitForShutdown(&threadGroup);
 183     }
 184     Shutdown();
 185
 186     return fRet;
 187 }
 188
 189 int main(int argc, char* argv[])
 190 {
 191     SetupEnvironment();
 192
 193     // Connect bitcoind signal handlers
 194     noui_connect();
 195
 196     return (AppInit(argc, argv) ? EXIT_SUCCESS : EXIT_FAILURE);
 197 }