~drizzle-trunk/drizzle/development

/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-

 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:

 *

 *  Copyright (C) 2008 Sun Microsystems, Inc.

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; version 2 of the License.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 */

#include <config.h>

#include <pthread.h>

#include <signal.h>

#include <sys/resource.h>

#include <unistd.h>

#include <sys/stat.h>

#include <sys/types.h>

#if TIME_WITH_SYS_TIME

# include <sys/time.h>

# include <time.h>

#else

# if HAVE_SYS_TIME_H

#  include <sys/time.h>

# else

#  include <time.h>

# endif

#endif

#if defined(HAVE_LOCALE_H)

# include <locale.h>

#endif

#include <boost/filesystem.hpp>

#include <drizzled/abort_exception.h>

#include <drizzled/catalog/local.h>

#include <drizzled/configmake.h>

#include <drizzled/data_home.h>

#include <drizzled/debug.h>

#include <drizzled/drizzled.h>

#include <drizzled/errmsg_print.h>

#include <drizzled/gettext.h>

#include <drizzled/internal/my_sys.h>

#include <drizzled/plugin.h>

#include <drizzled/plugin/client.h>

#include <drizzled/plugin/listen.h>

#include <drizzled/plugin/monitored_in_transaction.h>

#include <drizzled/pthread_globals.h>

#include <drizzled/replication_services.h>

#include <drizzled/session.h>

#include <drizzled/session/cache.h>

#include <drizzled/signal_handler.h>

#include <drizzled/transaction_services.h>

#include <drizzled/unireg.h>

#include <drizzled/util/backtrace.h>

#include <drizzled/current_session.h>

#include <drizzled/daemon.h>

#include <drizzled/diagnostics_area.h>

#include <drizzled/sql_base.h>

#include <drizzled/sql_lex.h>

#include <drizzled/system_variables.h>

using namespace drizzled;

using namespace std;

static pthread_t select_thread;

static uint32_t thr_kill_signal;

extern bool opt_daemon;

/**

  All global error messages are sent here where the first one is stored

  for the client.

*/

static void my_message_sql(drizzled::error_t error, const char *str, myf MyFlags)

{

  Session* session= current_session;

  /*

    Put here following assertion when situation with EE_* error codes

    will be fixed

  */

  if (session)

  {

    if (MyFlags & ME_FATALERROR)

    {

      session->is_fatal_error= 1;

    }

    /*

      @TODO There are two exceptions mechanism (Session and sp_rcontext),

      this could be improved by having a common stack of handlers.

    if (session->handle_error(error, str, DRIZZLE_ERROR::WARN_LEVEL_ERROR))

      return;

    */

    /*

      session->lex().current_select == 0 if lex structure is not inited

      (not query command (COM_QUERY))

    */

    if (! (session->lex().current_select &&

           session->lex().current_select->no_error && !session->is_fatal_error))

    {

      if (! session->main_da().is_error())            // Return only first message

      {

        if (error == EE_OK)

          error= ER_UNKNOWN_ERROR;

        if (str == NULL)

          str= ER(error);

        session->main_da().set_error_status(error, str);

      }

    }

    if (!session->no_warnings_for_error && !session->is_fatal_error)

    {

      /*

        Suppress infinite recursion if there a memory allocation error

        inside push_warning.

      */

      session->no_warnings_for_error= true;

      push_warning(session, DRIZZLE_ERROR::WARN_LEVEL_ERROR, error, str);

      session->no_warnings_for_error= false;

    }

  }

  if (not session || MyFlags & ME_NOREFRESH)

  {

    errmsg_printf(error::ERROR, "%s: %s",internal::my_progname,str);

  }

}

static void init_signals(void)

{

  sigset_t set;

  struct sigaction sa;

  if (not (getDebug().test(debug::NO_STACKTRACE) ||

        getDebug().test(debug::CORE_ON_SIGNAL)))

  {

    sa.sa_flags = SA_RESETHAND | SA_NODEFER;

    sigemptyset(&sa.sa_mask);

    sigprocmask(SIG_SETMASK,&sa.sa_mask,NULL);

    sa.sa_handler= drizzled_handle_segfault;

    sigaction(SIGSEGV, &sa, NULL);

    sigaction(SIGABRT, &sa, NULL);

#ifdef SIGBUS

    sigaction(SIGBUS, &sa, NULL);

#endif

    sigaction(SIGILL, &sa, NULL);

    sigaction(SIGFPE, &sa, NULL);

  }

  if (getDebug().test(debug::CORE_ON_SIGNAL))

  {

    /* Change limits so that we will get a core file */

    struct rlimit rl;

    rl.rlim_cur = rl.rlim_max = RLIM_INFINITY;

    if (setrlimit(RLIMIT_CORE, &rl) && global_system_variables.log_warnings)

        errmsg_printf(error::WARN,

                      _("setrlimit could not change the size of core files "

                        "to 'infinity';  We may not be able to generate a "

                        "core file on signals"));

  }

  (void) sigemptyset(&set);

  ignore_signal(SIGPIPE);

  sigaddset(&set,SIGPIPE);

#ifndef IGNORE_SIGHUP_SIGQUIT

  sigaddset(&set,SIGQUIT);

  sigaddset(&set,SIGHUP);

#endif

  sigaddset(&set,SIGTERM);

  /* Fix signals if blocked by parents (can happen on Mac OS X) */

  sigemptyset(&sa.sa_mask);

  sa.sa_flags = 0;

  sa.sa_handler = drizzled_print_signal_warning;

  sigaction(SIGTERM, &sa, NULL);

  sa.sa_flags = 0;

  sa.sa_handler = drizzled_print_signal_warning;

  sigaction(SIGHUP, &sa, NULL);

#ifdef SIGTSTP

  sigaddset(&set,SIGTSTP);

#endif

  if (getDebug().test(debug::ALLOW_SIGINT))

  {

    sa.sa_flags= 0;

    sa.sa_handler= drizzled_end_thread_signal;

    sigaction(thr_kill_signal, &sa, NULL);

    // May be SIGINT

    sigdelset(&set, thr_kill_signal);

  }

  else

  {

    sigaddset(&set,SIGINT);

  }

  sigprocmask(SIG_SETMASK,&set,NULL);

  pthread_sigmask(SIG_SETMASK,&set,NULL);

  return;

}

static void GoogleProtoErrorThrower(google::protobuf::LogLevel level,

                                    const char* ,

                                    int, const string& ) throw(const char *)

{

  switch(level)

  {

  case google::protobuf::LOGLEVEL_INFO:

    break;

  case google::protobuf::LOGLEVEL_WARNING:

  case google::protobuf::LOGLEVEL_ERROR:

  case google::protobuf::LOGLEVEL_FATAL:

  default:

    throw("error in google protocol buffer parsing");

  }

}

int main(int argc, char **argv)

{

#if defined(ENABLE_NLS)

# if defined(HAVE_LOCALE_H)

  setlocale(LC_ALL, "");

# endif

  bindtextdomain("drizzle7", LOCALEDIR);

  textdomain("drizzle7");

#endif

  module::Registry &modules= module::Registry::singleton();

  drizzled::internal::my_progname= argv[0]; 

  drizzled::internal::my_init();

  /* nothing should come before this line ^^^ */

  /* Set signal used to kill Drizzle */

  thr_kill_signal= SIGINT;

  google::protobuf::SetLogHandler(&GoogleProtoErrorThrower);

  /* Function generates error messages before abort */

  error_handler_hook= my_message_sql;

  /* init_common_variables must get basic settings such as data_home_dir and plugin_load_list. */

  if (not init_variables_before_daemonizing(argc, argv))

  {

    unireg_abort << "init_variables_before_daemonizing() failed";				// Will do exit

  }

  if (opt_daemon and was_help_requested() == false)

  {

    if (signal(SIGHUP, SIG_IGN) == SIG_ERR)

    {

      perror("Failed to ignore SIGHUP");

    }

    if (daemonize())

    {

      unireg_abort << "--daemon failed";

    }

  }

  if (not init_variables_after_daemonizing(modules))

  {

    unireg_abort << "init_variables_after_daemonizing() failed";				// Will do exit

  }

  /*

    init signals & alarm

    After this we can't quit by a simple unireg_abort

  */

  init_signals();

  select_thread= pthread_self();

  select_thread_in_use=1;

  if (was_help_requested() == false)

  {

    if (chdir(getDataHome().file_string().c_str()))

    {

      unireg_abort << "Data directory " << getDataHome().file_string() << " does not exist";

    }

    ifstream old_uuid_file ("server.uuid");

    if (old_uuid_file.is_open())

    {

      getline(old_uuid_file, server_uuid);

      old_uuid_file.close();

    } 

    else 

    {

      uuid_t uu;

      char uuid_string[37];

      uuid_generate_random(uu);

      uuid_unparse(uu, uuid_string);

      ofstream new_uuid_file ("server.uuid");

      new_uuid_file << uuid_string;

      new_uuid_file.close();

      server_uuid= string(uuid_string);

    }

    if (mkdir("local", 0700) == -1)

    {

      switch (errno)

      {

      case EEXIST:

        break;

      case EACCES:

        {

          char cwd[1024];

          unireg_abort << "Could not create local catalog, permission denied in directory:" << getcwd(cwd, sizeof(cwd));

        }

      default:

        {

          char cwd[1024];

          unireg_abort << "Could not create local catalog, in directory:" << getcwd(cwd, sizeof(cwd)) << " system error was:" << strerror(errno);

        }

      }

    }

    if (chdir("local") == -1)

    {

      unireg_abort << "Local catalog does not exist, was unable to chdir() to " << getDataHome().file_string();

    }

    setFullDataHome(boost::filesystem::system_complete(getDataHome()));

    errmsg_printf(error::INFO, "Data Home directory is : %s", getFullDataHome().native_file_string().c_str());

  }

  if (server_id == 0)

  {

    server_id= 1;

  }

  try

  {

    init_server_components(modules);

  }

  catch (abort_exception& ex)

  {

#if defined(DEBUG)

    cout << _("Drizzle has receieved an abort event.") << endl;

    cout << _("In Function: ") << *::boost::get_error_info<boost::throw_function>(ex) << endl;

    cout << _("In File: ") << *::boost::get_error_info<boost::throw_file>(ex) << endl;

    cout << _("On Line: ") << *::boost::get_error_info<boost::throw_line>(ex) << endl;

#endif

    unireg_abort << "init_server_components() failed";

  }

  /**

   * This check must be done after init_server_components for now

   * because we don't yet have plugin dependency tracking...

   *

   * ReplicationServices::evaluateRegisteredPlugins() will print error messages to stderr

   * via errmsg_printf().

   *

   * @todo

   *

   * not checking return since unireg_abort() hangs

   */

  (void) ReplicationServices::evaluateRegisteredPlugins();

  if (plugin::Listen::setup())

  {

    unireg_abort << "Failed plugin::Listen::setup()";

  }

  assert(plugin::num_trx_monitored_objects > 0);

  drizzle_rm_tmp_tables();

  errmsg_printf(error::INFO, _(ER(ER_STARTUP)), internal::my_progname, PANDORA_RELEASE_VERSION, COMPILATION_COMMENT);

  /* Send server startup event */

  {

    Session::shared_ptr session= Session::make_shared(plugin::Listen::getNullClient(), catalog::local());

    setCurrentSession(session.get());

    TransactionServices::sendStartupEvent(*session);

    plugin_startup_window(modules, *session.get());

  }

  if (opt_daemon)

  {

    daemon_is_ready();

  }

  errmsg_printf(error::INFO, "Drizzle startup complete, listening for connections will now begin.");

  /*

    Listen for new connections and start new session for each connection

     accepted. The listen.getClient() method will return NULL when the server

     should be shutdown.

   */

  while (plugin::Client* client= plugin::Listen::getClient())

  {

    Session::shared_ptr session= Session::make_shared(client, client->catalog());

    /* If we error on creation we drop the connection and delete the session. */

    if (Session::schedule(session))

      Session::unlink(session);

  }

  /* Send server shutdown event */

  {

    Session::shared_ptr session= Session::make_shared(plugin::Listen::getNullClient(), catalog::local());

    setCurrentSession(session.get());

    TransactionServices::sendShutdownEvent(*session.get());

  }

  {

    boost::mutex::scoped_lock scopedLock(session::Cache::mutex());

    select_thread_in_use= false;			// For close_connections

  }

  COND_thread_count.notify_all();

  /* Wait until cleanup is done */

  session::Cache::shutdownSecond();

  clean_up(1);

  module::Registry::shutdown();

  internal::my_end();

  errmsg_printf(error::INFO, "Drizzle is now shutting down");

  return 0;

}