lib_sql.cc 16.2 KB
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/*
 * Copyright (c)  2000
 * SWsoft  company
 *
 * This material is provided "as is", with absolutely no warranty expressed
 * or implied. Any use is at your own risk.
 *
 * Permission to use or copy this software for any purpose is hereby granted 
 * without fee, provided the above notices are retained on all copies.
 * Permission to modify the code and to distribute modified code is granted,
 * provided the above notices are retained, and a notice that the code was
 * modified is included with the above copyright notice.
 *
 */
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#include "embedded_priv.h"
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#include "sys/types.h"
#include "../regex/regex.h"
#include "my_sys.h"

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/*
  The following is needed to not cause conflicts when we include mysqld.cc
*/

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#define main main1
#define mysql_unix_port mysql_inix_port1
#define mysql_port mysql_port1
#define net_read_timeout net_read_timeout1
#define net_write_timeout net_write_timeout1
#define changeable_vars changeable_vars1

extern "C"
{
#include "mysql_com.h"
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#include "lib_vio.c"
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}


class THD;

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static int check_connections1(THD * thd);
static int check_connections2(THD * thd);
static bool check_user(THD *thd, enum_server_command command,
		       const char *user, const char *passwd, const char *db,
		       bool check_count);
void free_defaults_internal(char ** argv) {if (argv) free_defaults(argv);}
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#define free_defaults free_defaults_internal

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#include "../sql/mysqld.cc"
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#define SCRAMBLE_LENGTH 8
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C_MODE_START

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char * get_mysql_home(){ return mysql_home;};
char * get_mysql_real_data_home(){ return mysql_real_data_home;};
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bool lib_dispatch_command(enum enum_server_command command, NET *net,
			  const char *arg, ulong length)
{
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  THD *thd=(THD *) net->vio->dest_thd;
  thd->store_globals();				// Fix if more than one connect
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  thd->net.last_error[0]=0;			// Clear error message
  thd->net.last_errno=0;
  
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  net_new_transaction(&thd->net);
  return dispatch_command(command, thd, (char *) arg, length + 1);
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}


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void lib_connection_phase(NET * net, int phase)
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{
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  THD * thd;
  thd = (THD *)(net->vio->dest_thd);
  if (thd)
  {
    switch (phase)
    {
    case 2: 
      check_connections2(thd);
      break;
    }
  }
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}
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C_MODE_END
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void start_embedded_conn1(NET * net)
{
  THD * thd = new THD;
  my_net_init(&thd->net,NULL);
  /* if (protocol_version>9) */
  thd->net.return_errno=1;
  thd->thread_id = thread_id++;

  Vio * v  = net->vio;
  if (!v)
  {
    v = vio_new(0,VIO_CLOSED,0);
    net->vio = v;
  }
  if (v)
  {
    v -> dest_thd = thd;
  } 
  thd->net.vio = v;
  if (thd->store_globals())
  {
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    fprintf(stderr,"store_globals failed.\n");
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    return;
  }

  thd->mysys_var=my_thread_var;
  thd->dbug_thread_id=my_thread_id();
  thd->thread_stack= (char*) &thd;

  if (thd->max_join_size == HA_POS_ERROR)
    thd->options |= OPTION_BIG_SELECTS;
  if (thd->options & OPTION_ANSI_MODE)
    thd->client_capabilities|=CLIENT_IGNORE_SPACE;

  thd->proc_info=0;				// Remove 'login'
  thd->command=COM_SLEEP;
  thd->version=refresh_version;
  thd->set_time();
  init_sql_alloc(&thd->mem_root,8192,8192);

  check_connections1(thd);
}




static int
check_connections1(THD *thd)
{
  uint connect_errors=0;
  NET *net= &thd->net;
  /*
  ** store the connection details
  */
  DBUG_PRINT("info", (("check_connections called by thread %d"),
	     thd->thread_id));
  DBUG_PRINT("general",("New connection received on %s",
			vio_description(net->vio)));
  if (!thd->host)                           // If TCP/IP connection
  {
      thd->host=(char*) localhost;
  }
  else /* Hostname given means that the connection was on a socket */
  {
    DBUG_PRINT("general",("Host: %s",thd->host));
    thd->ip=0;
    bzero((char*) &thd->remote,sizeof(struct sockaddr));
  }
  //vio_keepalive(net->vio, TRUE);

  /* nasty, but any other way? */
  uint pkt_len = 0;
  
    char buff[80],*end;
    int client_flags = CLIENT_LONG_FLAG | CLIENT_CONNECT_WITH_DB |
	               CLIENT_TRANSACTIONS;
    LINT_INIT(pkt_len);

    end=strmov(buff,server_version)+1;
    int4store((uchar*) end,thd->thread_id);
    end+=4;
    memcpy(end,thd->scramble,SCRAMBLE_LENGTH+1);
    end+=SCRAMBLE_LENGTH +1;
    int2store(end,client_flags);
    end[2]=MY_CHARSET_CURRENT;

#define MIN_HANDSHAKE_SIZE	6

    int2store(end+3,thd->server_status);
    bzero(end+5,13);
    end+=18;
    if (net_write_command(net,protocol_version, buff,
			  (uint) (end-buff))) 
    {
      inc_host_errors(&thd->remote.sin_addr);
      return(ER_HANDSHAKE_ERROR);
    }
   return 0; 
}

static int
check_connections2(THD * thd)
{
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  uint connect_errors=0;
  uint pkt_len = 0;
  NET * net = &thd -> net;
  if (protocol_version>9) net -> return_errno=1;
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  if ( (pkt_len=my_net_read(net)) == packet_error ||
       pkt_len < MIN_HANDSHAKE_SIZE)
  {
    inc_host_errors(&thd->remote.sin_addr);
    return(ER_HANDSHAKE_ERROR);
  }
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#ifdef _CUSTOMCONFIG_
#include "_cust_sql_parse.h"
#endif
  if (connect_errors)
    reset_host_errors(&thd->remote.sin_addr);
  if (thd->packet.alloc(net_buffer_length))
    return(ER_OUT_OF_RESOURCES);

  thd->client_capabilities=uint2korr(net->read_pos);

  thd->max_packet_length=uint3korr(net->read_pos+2);
  char *user=   (char*) net->read_pos+5;
  char *passwd= strend(user)+1;
  char *db=0;
  if (passwd[0] && strlen(passwd) != SCRAMBLE_LENGTH)
    return ER_HANDSHAKE_ERROR;
  if (thd->client_capabilities & CLIENT_CONNECT_WITH_DB)
    db=strend(passwd)+1;
  if (thd->client_capabilities & CLIENT_INTERACTIVE)
    thd->inactive_timeout=net_interactive_timeout;
  if (thd->client_capabilities & CLIENT_TRANSACTIONS)
    thd->net.return_status= &thd->server_status;
  net->timeout=net_read_timeout;
  if (check_user(thd,COM_CONNECT, user, passwd, db, 1))
    return (-1);
  thd->password=test(passwd[0]);
  return 0;
}


static bool check_user(THD *thd,enum_server_command command, const char *user,
		       const char *passwd, const char *db, bool check_count)
{
  NET *net= &thd->net;
  thd->db=0;

  if (!(thd->user = my_strdup(user, MYF(0))))
  {
    send_error(net,ER_OUT_OF_RESOURCES);
    return 1;
  }
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  thd->master_access=acl_getroot(thd, thd->host, thd->ip, thd->user,
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				 passwd, thd->scramble, &thd->priv_user,
				 protocol_version == 9 ||
				 !(thd->client_capabilities &
				   CLIENT_LONG_PASSWORD));
  DBUG_PRINT("general",
	     ("Capabilities: %d  packet_length: %d  Host: '%s'  User: '%s'  Using password: %s  Access: %u  db: '%s'",
	      thd->client_capabilities, thd->max_packet_length,
	      thd->host ? thd->host : thd->ip, thd->priv_user,
	      passwd[0] ? "yes": "no",
	      thd->master_access, thd->db ? thd->db : "*none*"));
  if (thd->master_access & NO_ACCESS)
  {
    net_printf(net, ER_ACCESS_DENIED_ERROR,
	       thd->user,
	       thd->host ? thd->host : thd->ip,
	       passwd[0] ? ER(ER_YES) : ER(ER_NO));
    mysql_log.write(thd,COM_CONNECT,ER(ER_ACCESS_DENIED_ERROR),
		    thd->user,
		    thd->host ? thd->host : thd->ip ? thd->ip : "unknown ip",
		    passwd[0] ? ER(ER_YES) : ER(ER_NO));
    return(1);					// Error already given
  }
  if (check_count)
  {
    VOID(pthread_mutex_lock(&LOCK_thread_count));
    bool tmp=(thread_count - delayed_insert_threads >= max_connections &&
	      !(thd->master_access & PROCESS_ACL));
    VOID(pthread_mutex_unlock(&LOCK_thread_count));
    if (tmp)
    {						// Too many connections
      send_error(net, ER_CON_COUNT_ERROR);
      return(1);
    }
  }
  mysql_log.write(thd,command,
		  (thd->priv_user == thd->user ?
		   (char*) "%s@%s on %s" :
		   (char*) "%s@%s as anonymous on %s"),
		  user,
		  thd->host ? thd->host : thd->ip ? thd->ip : "unknown ip",
		  db ? db : (char*) "");
  thd->db_access=0;
  if (db && db[0])
    return test(mysql_change_db(thd,db));
  else
    send_ok(net);				// Ready to handle questions
  return 0;					// ok
}


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extern "C"
{

static my_bool inited, org_my_init_done;

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int STDCALL mysql_server_init(int argc, char **argv, char **groups)
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{
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  char glob_hostname[FN_REFLEN];
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  /* This mess is to allow people to call the init function without
   * having to mess with a fake argv */
  int *argcp;
  char ***argvp;
  int fake_argc = 1;
  char *fake_argv[] = { (char *)"", 0 };
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  const char *fake_groups[] = { "server", "embedded", 0 };
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  if (argc)
  {
    argcp = &argc;
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    argvp = (char***) &argv;
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  }
  else
  {
    argcp = &fake_argc;
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    argvp = (char ***) &fake_argv;
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  }
  if (!groups)
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      groups = (char**) fake_groups;
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  my_umask=0660;		// Default umask for new files
  my_umask_dir=0700;		// Default umask for new directories
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  /* Only call MY_INIT() if it hasn't been called before */
  if (!inited)
  {
    inited=1;
    org_my_init_done=my_init_done;
  }
  if (!org_my_init_done)
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  {
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    MY_INIT((char *)"mysql_embedded");	// init my_sys library & pthreads
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  }
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  tzset();			// Set tzname

  start_time=time((time_t*) 0);
#ifdef HAVE_TZNAME
#if defined(HAVE_LOCALTIME_R) && defined(_REENTRANT)
  {
    struct tm tm_tmp;
    localtime_r(&start_time,&tm_tmp);
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    strmov(time_zone,tzname[tm_tmp.tm_isdst != 0 ? 1 : 0]);
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  }
#else
  {
    struct tm *start_tm;
    start_tm=localtime(&start_time);
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    strmov(time_zone,tzname[start_tm->tm_isdst != 0 ? 1 : 0]);
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  }
#endif
#endif

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  if (gethostname(glob_hostname,sizeof(glob_hostname)-4) < 0)
    strmov(glob_hostname,"mysql");
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#ifndef DBUG_OFF
  strcat(server_version,"-debug");
#endif
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  strcat(server_version,"-embedded");
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  load_defaults("my", (const char **) groups, argcp, argvp);
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  defaults_argv=*argvp;
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  mysql_tmpdir=getenv("TMPDIR");	/* Use this if possible */
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#if defined( __WIN__) || defined(OS2)
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  if (!mysql_tmpdir)
    mysql_tmpdir=getenv("TEMP");
  if (!mysql_tmpdir)
    mysql_tmpdir=getenv("TMP");
#endif
  if (!mysql_tmpdir || !mysql_tmpdir[0])
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    mysql_tmpdir=(char*) P_tmpdir;		/* purecov: inspected */
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  set_options();
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  get_options(*argcp, *argvp);
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  if (opt_log || opt_update_log || opt_slow_log || opt_bin_log)
    strcat(server_version,"-log");
  DBUG_PRINT("info",("%s  Ver %s for %s on %s\n",my_progname,
		     server_version, SYSTEM_TYPE,MACHINE_TYPE));

  /* These must be set early */

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  (void) pthread_mutex_init(&LOCK_mysql_create_db,MY_MUTEX_INIT_SLOW);
  (void) pthread_mutex_init(&LOCK_Acl,MY_MUTEX_INIT_SLOW);
  (void) pthread_mutex_init(&LOCK_grant,MY_MUTEX_INIT_FAST);
  (void) pthread_mutex_init(&LOCK_open,MY_MUTEX_INIT_FAST);
  (void) pthread_mutex_init(&LOCK_thread_count,MY_MUTEX_INIT_FAST);
  (void) pthread_mutex_init(&LOCK_mapped_file,MY_MUTEX_INIT_SLOW);
  (void) pthread_mutex_init(&LOCK_status,MY_MUTEX_INIT_FAST);
  (void) pthread_mutex_init(&LOCK_error_log,MY_MUTEX_INIT_FAST);
  (void) pthread_mutex_init(&LOCK_delayed_insert,MY_MUTEX_INIT_FAST);
  (void) pthread_mutex_init(&LOCK_delayed_status,MY_MUTEX_INIT_FAST);
  (void) pthread_mutex_init(&LOCK_delayed_create,MY_MUTEX_INIT_SLOW);
  (void) pthread_mutex_init(&LOCK_manager,MY_MUTEX_INIT_FAST);
  (void) pthread_mutex_init(&LOCK_crypt,MY_MUTEX_INIT_FAST);
  (void) pthread_mutex_init(&LOCK_bytes_sent,MY_MUTEX_INIT_FAST);
  (void) pthread_mutex_init(&LOCK_bytes_received,MY_MUTEX_INIT_FAST);
  (void) pthread_mutex_init(&LOCK_timezone,MY_MUTEX_INIT_FAST);
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  (void) pthread_mutex_init(&LOCK_slave_io, MY_MUTEX_INIT_FAST);
  (void) pthread_mutex_init(&LOCK_slave_sql, MY_MUTEX_INIT_FAST);
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  (void) pthread_mutex_init(&LOCK_server_id, MY_MUTEX_INIT_FAST);
  (void) pthread_mutex_init(&LOCK_user_conn, MY_MUTEX_INIT_FAST);
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  (void) pthread_cond_init(&COND_thread_count,NULL);
  (void) pthread_cond_init(&COND_refresh,NULL);
  (void) pthread_cond_init(&COND_thread_cache,NULL);
  (void) pthread_cond_init(&COND_flush_thread_cache,NULL);
  (void) pthread_cond_init(&COND_manager,NULL);
  (void) pthread_cond_init(&COND_binlog_update, NULL);
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  (void) pthread_cond_init(&COND_slave_log_update, NULL);
  (void) pthread_cond_init(&COND_slave_sql_stop, NULL);
  (void) pthread_cond_init(&COND_slave_sql_start, NULL);
  (void) pthread_cond_init(&COND_slave_sql_stop, NULL);
  (void) pthread_cond_init(&COND_slave_sql_start, NULL);
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  if (set_default_charset_by_name(default_charset, MYF(MY_WME)))
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  {
    mysql_server_end();
    return 1;
  }
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  charsets_list = list_charsets(MYF(MY_COMPILED_SETS|MY_CONFIG_SETS));

  /* Parameter for threads created for connections */
  (void) pthread_attr_init(&connection_attrib);
  (void) pthread_attr_setdetachstate(&connection_attrib,
				     PTHREAD_CREATE_DETACHED);
  pthread_attr_setstacksize(&connection_attrib,thread_stack);
  pthread_attr_setscope(&connection_attrib, PTHREAD_SCOPE_SYSTEM);

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#if defined( SET_RLIMIT_NOFILE) || defined( OS2)
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  /* connections and databases neads lots of files */
  {
    uint wanted_files=10+(uint) max(max_connections*5,
				    max_connections+table_cache_size*2);
    uint files=set_maximum_open_files(wanted_files);
    if (files && files < wanted_files)		// Some systems return 0
    {
      max_connections=	(ulong) min((files-10),max_connections);
      table_cache_size= (ulong) max((files-10-max_connections)/2,64);
      DBUG_PRINT("warning",
		 ("Changed limits: max_connections: %ld  table_cache: %ld",
		  max_connections,table_cache_size));
      sql_print_error("Warning: Changed limits: max_connections: %ld  table_cache: %ld",max_connections,table_cache_size);
    }
  }
#endif
  unireg_init(opt_specialflag); /* Set up extern variabels */
  init_errmessage();		/* Read error messages from file */
  lex_init();
  item_init();
  mysys_uses_curses=0;
#ifdef USE_REGEX
  regex_init();
#endif
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  if (use_temp_pool && bitmap_init(&temp_pool,1024))
  {
    mysql_server_end();
    return 1;
  }
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  /*
  ** We have enough space for fiddling with the argv, continue
  */
  umask(((~my_umask) & 0666));
  table_cache_init();
  hostname_cache_init();
  sql_cache_init();
  randominit(&sql_rand,(ulong) start_time,(ulong) start_time/2);
  reset_floating_point_exceptions();
  init_thr_lock();
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  init_slave_list();
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  /* Setup log files */
  if (opt_log)
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    open_log(&mysql_log, glob_hostname, opt_logname, ".log", LOG_NORMAL);
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  if (opt_update_log)
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  {
    open_log(&mysql_update_log, glob_hostname, opt_update_logname, "",
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	     LOG_NEW);
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    using_update_log=1;
  }
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  if (opt_bin_log)
  {
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    if (!opt_bin_logname)
    {
      char tmp[FN_REFLEN];
      strmake(tmp,glob_hostname,FN_REFLEN-5);
      strmov(strcend(tmp,'.'),"-bin");
      opt_bin_logname=my_strdup(tmp,MYF(MY_WME));
    }
    mysql_bin_log.set_index_file_name(opt_binlog_index_name);
    open_log(&mysql_bin_log, glob_hostname, opt_bin_logname, "-bin",
	     LOG_BIN);
    using_update_log=1;
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  }
  
  if (opt_slow_log)
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    open_log(&mysql_slow_log, glob_hostname, opt_slow_logname, "-slow.log",
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	     LOG_NORMAL);
  if (ha_init())
  {
    sql_print_error("Can't init databases");
    exit(1);
  }
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  ha_key_cache();
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#ifdef HAVE_MLOCKALL
  if (locked_in_memory && !geteuid())
  {
    ha_key_cache();
    if (mlockall(MCL_CURRENT))
    {
      sql_print_error("Warning: Failed to lock memory. Errno: %d\n",errno);
    }
    else
      locked_in_memory=1;
  }
#else
  locked_in_memory=0;
#endif    

  if (opt_myisam_log)
    (void) mi_log( 1 );
  ft_init_stopwords(ft_precompiled_stopwords);       /* SerG */

  /*
    init signals & alarm
    After this we can't quit by a simple unireg_abort
  */
  error_handler_hook = my_message_sql;
  if (pthread_key_create(&THR_THD,NULL) || pthread_key_create(&THR_NET,NULL) ||
      pthread_key_create(&THR_MALLOC,NULL))
  {
    sql_print_error("Can't create thread-keys");
    exit(1);
  }
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  opt_noacl = 1;				// No permissions
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  if (acl_init(opt_noacl))
  {
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    mysql_server_end();
    return 1;
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  }

#ifdef HAVE_DLOPEN
  if (!opt_noacl)
    udf_init();
#endif

  (void) thr_setconcurrency(concurrency);	// 10 by default

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  if (
#ifdef HAVE_BERKELEY_DB
      !berkeley_skip ||
#endif
      (flush_time && flush_time != ~(ulong) 0L))
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  {
    pthread_t hThread;
    if (pthread_create(&hThread,&connection_attrib,handle_manager,0))
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    {
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      sql_print_error("Warning: Can't create thread to manage maintenance");
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      mysql_server_end();
      return 1;
    }
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  }
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  return 0;
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}

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void STDCALL mysql_server_end()
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{
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  clean_up(0);
#ifdef THREAD
  /* Don't call my_thread_end() if the application is using MY_INIT() */
  if (!org_my_init_done)
    my_thread_end();
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#endif
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}

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my_bool STDCALL mysql_thread_init()
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{
#ifdef THREAD
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  return my_thread_init();
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#else
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  return 0;
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#endif
}
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void STDCALL mysql_thread_end()
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{
#ifdef THREAD
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  my_thread_end();
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#endif
}

void start_embedded_connection(NET * net)
{
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  start_embedded_conn1(net);
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}
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void end_embedded_connection(NET * net)
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{
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  THD *thd = (THD *) net->vio->dest_thd;
  delete thd;
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}
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} /* extern "C" */