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/* Copyright (C) 2000 MySQL AB

   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; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
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#include <my_global.h>
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#if defined(__WIN__) || defined(_WIN32) || defined(_WIN64)
#include <winsock.h>
#include <odbcinst.h>
#endif
#include <my_sys.h>
#include <mysys_err.h>
#include <m_string.h>
#include <m_ctype.h>
#include "mysql.h"
#include "mysql_version.h"
#include "mysqld_error.h"
#include "errmsg.h"
#include <violite.h>
#include <sys/stat.h>
#include <signal.h>
#include <time.h>
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#include <assert.h> /* for DBUG_ASSERT() */
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#ifdef	 HAVE_PWD_H
#include <pwd.h>
#endif
#if !defined(MSDOS) && !defined(__WIN__)
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#ifdef HAVE_SELECT_H
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#include <select.h>
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#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#endif
#ifdef HAVE_SYS_UN_H
#  include <sys/un.h>
#endif
#if defined(THREAD) && !defined(__WIN__)
#include <my_pthread.h>				/* because of signal()	*/
#endif
#ifndef INADDR_NONE
#define INADDR_NONE	-1
#endif

static my_bool	mysql_client_init=0;
uint		mysql_port=0;
my_string	mysql_unix_port=0;
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ulong 		net_buffer_length=8192;
ulong		max_allowed_packet=16*1024*1024L;
ulong		net_read_timeout=  NET_READ_TIMEOUT;
ulong		net_write_timeout= NET_WRITE_TIMEOUT;
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#define CLIENT_CAPABILITIES (CLIENT_LONG_PASSWORD | CLIENT_LONG_FLAG	  \
                             | CLIENT_LOCAL_FILES   | CLIENT_TRANSACTIONS \
			     | CLIENT_PROTOCOL_41)
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#ifdef __WIN__
#define CONNECT_TIMEOUT 20
#else
#define CONNECT_TIMEOUT 0
#endif

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#if defined(MSDOS) || defined(__WIN__)
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// socket_errno is defined in my_global.h for all platforms
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#define perror(A)
#else
#include <errno.h>
#define SOCKET_ERROR -1
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#endif /* __WIN__ */
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#ifdef HAVE_SMEM
char *shared_memory_base_name=0;
const char *def_shared_memory_base_name=default_shared_memory_base_name;
#endif

const char *sql_protocol_names_lib[] =
{ "TCP", "SOCKET", "PIPE", "MEMORY",NullS };
TYPELIB sql_protocol_typelib = {array_elements(sql_protocol_names_lib)-1,"",
			   sql_protocol_names_lib};
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/*
  If allowed through some configuration, then this needs to
  be changed
*/
#define MAX_LONG_DATA_LENGTH 8192
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#define protocol_41(A) ((A)->server_capabilities & CLIENT_PROTOCOL_41)
#define unsigned_field(A) ((A)->flags & UNSIGNED_FLAG)

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static void mysql_once_init(void);
static MYSQL_DATA *read_rows (MYSQL *mysql,MYSQL_FIELD *fields,
			      uint field_count);
static int read_one_row(MYSQL *mysql,uint fields,MYSQL_ROW row,
			ulong *lengths);
static void end_server(MYSQL *mysql);
static void read_user_name(char *name);
static void append_wild(char *to,char *end,const char *wild);
static my_bool mysql_reconnect(MYSQL *mysql);
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static my_bool send_file_to_server(MYSQL *mysql,const char *filename);
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static sig_handler pipe_sig_handler(int sig);
static ulong mysql_sub_escape_string(CHARSET_INFO *charset_info, char *to,
				     const char *from, ulong length);

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static my_bool org_my_init_done=0;

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int STDCALL mysql_server_init(int argc __attribute__((unused)),
			      char **argv __attribute__((unused)),
			      char **groups __attribute__((unused)))
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{
  return 0;
}
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void STDCALL mysql_server_end()
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{
  /* If library called my_init(), free memory allocated by it */
  if (!org_my_init_done)
    my_end(0);
}
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my_bool STDCALL mysql_thread_init()
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{
#ifdef THREAD
    return my_thread_init();
#else
    return 0;
#endif
}

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void STDCALL mysql_thread_end()
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{
#ifdef THREAD
    my_thread_end();
#endif
}

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/*
  Let the user specify that we don't want SIGPIPE;  This doesn't however work
  with threaded applications as we can have multiple read in progress.
*/

#if !defined(__WIN__) && defined(SIGPIPE) && !defined(THREAD)
#define init_sigpipe_variables  sig_return old_signal_handler=(sig_return) 0;
#define set_sigpipe(mysql)     if ((mysql)->client_flag & CLIENT_IGNORE_SIGPIPE) old_signal_handler=signal(SIGPIPE,pipe_sig_handler)
#define reset_sigpipe(mysql) if ((mysql)->client_flag & CLIENT_IGNORE_SIGPIPE) signal(SIGPIPE,old_signal_handler);
#else
#define init_sigpipe_variables
#define set_sigpipe(mysql)
#define reset_sigpipe(mysql)
#endif

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static MYSQL* spawn_init(MYSQL* parent, const char* host,
			 unsigned int port,
			 const char* user,
			 const char* passwd);


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/****************************************************************************
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  A modified version of connect().  my_connect() allows you to specify
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  a timeout value, in seconds, that we should wait until we
  derermine we can't connect to a particular host.  If timeout is 0,
  my_connect() will behave exactly like connect().

  Base version coded by Steve Bernacki, Jr. <steve@navinet.net>
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*****************************************************************************/

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my_bool my_connect(my_socket s, const struct sockaddr *name,
		   uint namelen, uint timeout)
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{
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#if defined(__WIN__) || defined(OS2)
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  return connect(s, (struct sockaddr*) name, namelen) != 0;
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#else
  int flags, res, s_err;
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  SOCKOPT_OPTLEN_TYPE s_err_size = sizeof(uint);
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  fd_set sfds;
  struct timeval tv;
  time_t start_time, now_time;

  /* If they passed us a timeout of zero, we should behave
   * exactly like the normal connect() call does.
   */

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  if (timeout == 0)
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    return connect(s, (struct sockaddr*) name, namelen) != 0;
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  flags = fcntl(s, F_GETFL, 0);		  /* Set socket to not block */
#ifdef O_NONBLOCK
  fcntl(s, F_SETFL, flags | O_NONBLOCK);  /* and save the flags..  */
#endif

  res = connect(s, (struct sockaddr*) name, namelen);
  s_err = errno;			/* Save the error... */
  fcntl(s, F_SETFL, flags);
  if ((res != 0) && (s_err != EINPROGRESS))
  {
    errno = s_err;			/* Restore it */
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    return(1);
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  }
  if (res == 0)				/* Connected quickly! */
    return(0);

  /* Otherwise, our connection is "in progress."  We can use
   * the select() call to wait up to a specified period of time
   * for the connection to suceed.  If select() returns 0
   * (after waiting howevermany seconds), our socket never became
   * writable (host is probably unreachable.)  Otherwise, if
   * select() returns 1, then one of two conditions exist:
   *
   * 1. An error occured.  We use getsockopt() to check for this.
   * 2. The connection was set up sucessfully: getsockopt() will
   * return 0 as an error.
   *
   * Thanks goes to Andrew Gierth <andrew@erlenstar.demon.co.uk>
   * who posted this method of timing out a connect() in
   * comp.unix.programmer on August 15th, 1997.
   */

  FD_ZERO(&sfds);
  FD_SET(s, &sfds);
  /*
   * select could be interrupted by a signal, and if it is, 
   * the timeout should be adjusted and the select restarted
   * to work around OSes that don't restart select and 
   * implementations of select that don't adjust tv upon
   * failure to reflect the time remaining
   */
  start_time = time(NULL);
  for (;;)
  {
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    tv.tv_sec = (long) timeout;
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    tv.tv_usec = 0;
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#if defined(HPUX) && defined(THREAD)
    if ((res = select(s+1, NULL, (int*) &sfds, NULL, &tv)) >= 0)
      break;
#else
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    if ((res = select(s+1, NULL, &sfds, NULL, &tv)) >= 0)
      break;
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#endif
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    now_time=time(NULL);
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    timeout-= (uint) (now_time - start_time);
    if (errno != EINTR || (int) timeout <= 0)
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      return 1;
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  }

  /* select() returned something more interesting than zero, let's
   * see if we have any errors.  If the next two statements pass,
   * we've got an open socket!
   */

  s_err=0;
  if (getsockopt(s, SOL_SOCKET, SO_ERROR, (char*) &s_err, &s_err_size) != 0)
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    return(1);
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  if (s_err)
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  {						/* getsockopt could succeed */
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    errno = s_err;
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    return(1);					/* but return an error... */
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  }
  return(0);					/* It's all good! */
#endif
}

/*
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  Create a named pipe connection
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*/

#ifdef __WIN__

HANDLE create_named_pipe(NET *net, uint connect_timeout, char **arg_host,
			 char **arg_unix_socket)
{
  HANDLE hPipe=INVALID_HANDLE_VALUE;
  char szPipeName [ 257 ];
  DWORD dwMode;
  int i;
  my_bool testing_named_pipes=0;
  char *host= *arg_host, *unix_socket= *arg_unix_socket;

  if ( ! unix_socket || (unix_socket)[0] == 0x00)
    unix_socket = mysql_unix_port;
  if (!host || !strcmp(host,LOCAL_HOST))
    host=LOCAL_HOST_NAMEDPIPE;

  sprintf( szPipeName, "\\\\%s\\pipe\\%s", host, unix_socket);
  DBUG_PRINT("info",("Server name: '%s'.  Named Pipe: %s",
		     host, unix_socket));

  for (i=0 ; i < 100 ; i++)			/* Don't retry forever */
  {
    if ((hPipe = CreateFile(szPipeName,
			    GENERIC_READ | GENERIC_WRITE,
			    0,
			    NULL,
			    OPEN_EXISTING,
			    0,
			    NULL )) != INVALID_HANDLE_VALUE)
      break;
    if (GetLastError() != ERROR_PIPE_BUSY)
    {
      net->last_errno=CR_NAMEDPIPEOPEN_ERROR;
      sprintf(net->last_error,ER(net->last_errno),host, unix_socket,
	      (ulong) GetLastError());
      return INVALID_HANDLE_VALUE;
    }
    /* wait for for an other instance */
    if (! WaitNamedPipe(szPipeName, connect_timeout*1000) )
    {
      net->last_errno=CR_NAMEDPIPEWAIT_ERROR;
      sprintf(net->last_error,ER(net->last_errno),host, unix_socket,
	      (ulong) GetLastError());
      return INVALID_HANDLE_VALUE;
    }
  }
  if (hPipe == INVALID_HANDLE_VALUE)
  {
    net->last_errno=CR_NAMEDPIPEOPEN_ERROR;
    sprintf(net->last_error,ER(net->last_errno),host, unix_socket,
	    (ulong) GetLastError());
    return INVALID_HANDLE_VALUE;
  }
  dwMode = PIPE_READMODE_BYTE | PIPE_WAIT;
  if ( !SetNamedPipeHandleState(hPipe, &dwMode, NULL, NULL) )
  {
    CloseHandle( hPipe );
    net->last_errno=CR_NAMEDPIPESETSTATE_ERROR;
    sprintf(net->last_error,ER(net->last_errno),host, unix_socket,
	    (ulong) GetLastError());
    return INVALID_HANDLE_VALUE;
  }
  *arg_host=host ; *arg_unix_socket=unix_socket;	/* connect arg */
  return (hPipe);
}
#endif

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/* 
  Create new shared memory connection, return handler of connection

  SYNOPSIS
    create_shared_memory()
    mysql  Pointer of mysql structure
    net    Pointer of net structure 
    connect_timeout Timeout of connection
*/
#ifdef HAVE_SMEM
HANDLE create_shared_memory(MYSQL *mysql,NET *net, uint connect_timeout)
{
  ulong smem_buffer_length = shared_memory_buffer_length + 4;
/*  
  event_connect_request is event object for start connection actions 
  event_connect_answer is event object for confirm, that server put data
  handle_connect_file_map is file-mapping object, use for create shared memory  
  handle_connect_map is pointer on shared memory
  handle_map is pointer on shared memory for client
  event_server_wrote,
  event_server_read,
  event_client_wrote,
  event_client_read are events for transfer data between server and client
  handle_file_map is file-mapping object, use for create shared memory
*/
  HANDLE event_connect_request = NULL;
  HANDLE event_connect_answer = NULL;
  HANDLE handle_connect_file_map = NULL;
  char *handle_connect_map = NULL;

  char *handle_map = NULL;
  HANDLE event_server_wrote = NULL;
  HANDLE event_server_read = NULL;
  HANDLE event_client_wrote = NULL;
  HANDLE event_client_read = NULL;
  HANDLE handle_file_map = NULL;
  ulong connect_number; 
  char connect_number_char[22], *p;
  char tmp[64];
  char *suffix_pos;  
  DWORD error_allow = 0;
  DWORD error_code = 0;
  char *shared_memory_base_name = mysql->options.shared_memory_base_name;

/*
  The name of event and file-mapping events create agree next rule:
            shared_memory_base_name+unique_part
  Where:
    shared_memory_base_name is unique value for each server
    unique_part is uniquel value for each object (events and file-mapping)
*/
  suffix_pos = strxmov(tmp,shared_memory_base_name,"_",NullS);
  strmov(suffix_pos, "CONNECT_REQUEST");
  if ((event_connect_request = OpenEvent(EVENT_ALL_ACCESS,FALSE,tmp)) == NULL) 
  {
    error_allow = CR_SHARED_MEMORY_CONNECT_REQUEST_ERROR;
    goto err;
  }
  strmov(suffix_pos, "CONNECT_ANSWER");
  if ((event_connect_answer = OpenEvent(EVENT_ALL_ACCESS,FALSE,tmp)) == NULL) 
  {
    error_allow = CR_SHARED_MEMORY_CONNECT_ANSWER_ERROR;
    goto err;
  }
  strmov(suffix_pos, "CONNECT_DATA");
  if ((handle_connect_file_map = OpenFileMapping(FILE_MAP_WRITE,FALSE,tmp)) == NULL) 
  {
    error_allow = CR_SHARED_MEMORY_CONNECT_FILE_MAP_ERROR;
    goto err;
  }
  if ((handle_connect_map = MapViewOfFile(handle_connect_file_map,FILE_MAP_WRITE,0,0,sizeof(DWORD))) == NULL) 
  {
    error_allow = CR_SHARED_MEMORY_CONNECT_MAP_ERROR;
    goto err;
  }
/*
 Send to server request of connection
*/
  if (!SetEvent(event_connect_request)) 
  {
    error_allow = CR_SHARED_MEMORY_CONNECT_SET_ERROR;
    goto err;
  }
/*
  Wait of answer from server
*/
  if (WaitForSingleObject(event_connect_answer,connect_timeout*1000) != WAIT_OBJECT_0)
  {
    error_allow = CR_SHARED_MEMORY_CONNECT_ABANDODED_ERROR;
    goto err;
  }
/*
  Get number of connection
*/
  connect_number = uint4korr(handle_connect_map);/*WAX2*/
  p = int2str(connect_number, connect_number_char, 10);

/*
  The name of event and file-mapping events create agree next rule:
    shared_memory_base_name+unique_part+number_of_connection
  Where:
    shared_memory_base_name is uniquel value for each server
    unique_part is uniquel value for each object (events and file-mapping)
    number_of_connection is number of connection between server and client
*/
  suffix_pos = strxmov(tmp,shared_memory_base_name,"_",connect_number_char,"_",NullS);
  strmov(suffix_pos, "DATA");
  if ((handle_file_map = OpenFileMapping(FILE_MAP_WRITE,FALSE,tmp)) == NULL)
  {
    error_allow = CR_SHARED_MEMORY_FILE_MAP_ERROR;
    goto err2;    
  }
  if ((handle_map = MapViewOfFile(handle_file_map,FILE_MAP_WRITE,0,0,smem_buffer_length)) == NULL)
  {
    error_allow = CR_SHARED_MEMORY_MAP_ERROR;
    goto err2;
  }

  strmov(suffix_pos, "SERVER_WROTE");
  if ((event_server_wrote = OpenEvent(EVENT_ALL_ACCESS,FALSE,tmp)) == NULL)
  {
    error_allow = CR_SHARED_MEMORY_EVENT_ERROR;
    goto err2;
  }

  strmov(suffix_pos, "SERVER_READ");
  if ((event_server_read = OpenEvent(EVENT_ALL_ACCESS,FALSE,tmp)) == NULL)
  {
    error_allow = CR_SHARED_MEMORY_EVENT_ERROR;
    goto err2;
  }

  strmov(suffix_pos, "CLIENT_WROTE");
  if ((event_client_wrote = OpenEvent(EVENT_ALL_ACCESS,FALSE,tmp)) == NULL)
  {
    error_allow = CR_SHARED_MEMORY_EVENT_ERROR;
    goto err2;
  }

  strmov(suffix_pos, "CLIENT_READ");
  if ((event_client_read = OpenEvent(EVENT_ALL_ACCESS,FALSE,tmp)) == NULL)
  {
    error_allow = CR_SHARED_MEMORY_EVENT_ERROR;
    goto err2;
  }
/*
  Set event that server should send data
*/
  SetEvent(event_server_read);

err2:   
  if (error_allow == 0) 
  {
    net->vio = vio_new_win32shared_memory(net,handle_file_map,handle_map,event_server_wrote,
                                          event_server_read,event_client_wrote,event_client_read);        
  } 
  else 
  {
    error_code = GetLastError();
    if (event_server_read) CloseHandle(event_server_read);
    if (event_server_wrote) CloseHandle(event_server_wrote);
    if (event_client_read) CloseHandle(event_client_read);
    if (event_client_wrote) CloseHandle(event_client_wrote);
    if (handle_map) UnmapViewOfFile(handle_map);
    if (handle_file_map) CloseHandle(handle_file_map);
  }
err:
  if (error_allow) error_code = GetLastError();
  if (event_connect_request) CloseHandle(event_connect_request);
  if (event_connect_answer) CloseHandle(event_connect_answer);
  if (handle_connect_map) UnmapViewOfFile(handle_connect_map);
  if (handle_connect_file_map) CloseHandle(handle_connect_file_map);
  if (error_allow) 
  {
    net->last_errno=error_allow;
    if (error_allow == CR_SHARED_MEMORY_EVENT_ERROR)
      sprintf(net->last_error,ER(net->last_errno),suffix_pos,error_code);
    else
      sprintf(net->last_error,ER(net->last_errno),error_code);
    return(INVALID_HANDLE_VALUE);
  } 
  return(handle_map);
};
#endif
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/*****************************************************************************
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  read a packet from server. Give error message if socket was down
  or packet is an error message
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*****************************************************************************/

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ulong
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net_safe_read(MYSQL *mysql)
{
  NET *net= &mysql->net;
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  ulong len=0;
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  init_sigpipe_variables

  /* Don't give sigpipe errors if the client doesn't want them */
  set_sigpipe(mysql);
  if (net->vio != 0)
    len=my_net_read(net);
  reset_sigpipe(mysql);

  if (len == packet_error || len == 0)
  {
    DBUG_PRINT("error",("Wrong connection or packet. fd: %s  len: %d",
			vio_description(net->vio),len));
    end_server(mysql);
    net->last_errno=(net->last_errno == ER_NET_PACKET_TOO_LARGE ? 
		     CR_NET_PACKET_TOO_LARGE:
		     CR_SERVER_LOST);
    strmov(net->last_error,ER(net->last_errno));
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    return (packet_error);
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  }
  if (net->read_pos[0] == 255)
  {
    if (len > 3)
    {
      char *pos=(char*) net->read_pos+1;
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      net->last_errno=uint2korr(pos);
      pos+=2;
      len-=2;
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      (void) strmake(net->last_error,(char*) pos,
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		     min((uint) len,(uint) sizeof(net->last_error)-1));
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    }
    else
    {
      net->last_errno=CR_UNKNOWN_ERROR;
      (void) strmov(net->last_error,ER(net->last_errno));
    }
    DBUG_PRINT("error",("Got error: %d (%s)", net->last_errno,
			net->last_error));
    return(packet_error);
  }
  return len;
}


/* Get the length of next field. Change parameter to point at fieldstart */
static ulong
net_field_length(uchar **packet)
{
  reg1 uchar *pos= *packet;
  if (*pos < 251)
  {
    (*packet)++;
    return (ulong) *pos;
  }
  if (*pos == 251)
  {
    (*packet)++;
    return NULL_LENGTH;
  }
  if (*pos == 252)
  {
    (*packet)+=3;
    return (ulong) uint2korr(pos+1);
  }
  if (*pos == 253)
  {
    (*packet)+=4;
    return (ulong) uint3korr(pos+1);
  }
  (*packet)+=9;					/* Must be 254 when here */
  return (ulong) uint4korr(pos+1);
}

/* Same as above, but returns ulonglong values */

static my_ulonglong
net_field_length_ll(uchar **packet)
{
  reg1 uchar *pos= *packet;
  if (*pos < 251)
  {
    (*packet)++;
    return (my_ulonglong) *pos;
  }
  if (*pos == 251)
  {
    (*packet)++;
    return (my_ulonglong) NULL_LENGTH;
  }
  if (*pos == 252)
  {
    (*packet)+=3;
    return (my_ulonglong) uint2korr(pos+1);
  }
  if (*pos == 253)
  {
    (*packet)+=4;
    return (my_ulonglong) uint3korr(pos+1);
  }
  (*packet)+=9;					/* Must be 254 when here */
#ifdef NO_CLIENT_LONGLONG
  return (my_ulonglong) uint4korr(pos+1);
#else
  return (my_ulonglong) uint8korr(pos+1);
#endif
}


static void free_rows(MYSQL_DATA *cur)
{
  if (cur)
  {
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    free_root(&cur->alloc,MYF(0));
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    my_free((gptr) cur,MYF(0));
  }
}


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static my_bool
advanced_command(MYSQL *mysql, enum enum_server_command command,
		 const char *header, ulong header_length,
		 const char *arg, ulong arg_length, my_bool skip_check)
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{
  NET *net= &mysql->net;
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  my_bool result= 1;
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  init_sigpipe_variables

  /* Don't give sigpipe errors if the client doesn't want them */
  set_sigpipe(mysql);
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  if (mysql->net.vio == 0)
  {						/* Do reconnect if possible */
    if (mysql_reconnect(mysql))
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      return 1;
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  }
  if (mysql->status != MYSQL_STATUS_READY)
  {
    strmov(net->last_error,ER(mysql->net.last_errno=CR_COMMANDS_OUT_OF_SYNC));
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    return 1;
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  }

  mysql->net.last_error[0]=0;
  mysql->net.last_errno=0;
  mysql->info=0;
  mysql->affected_rows= ~(my_ulonglong) 0;
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  net_clear(&mysql->net);			/* Clear receive buffer */
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  if (net_write_command(net,(uchar) command, header, header_length,
			arg, arg_length))
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  {
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    DBUG_PRINT("error",("Can't send command to server. Error: %d",
			socket_errno));
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    end_server(mysql);
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    if (mysql_reconnect(mysql))
      goto end;
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    if (net_write_command(net,(uchar) command, header, header_length,
			  arg, arg_length))
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    {
      net->last_errno=CR_SERVER_GONE_ERROR;
      strmov(net->last_error,ER(net->last_errno));
      goto end;
    }
  }
  result=0;
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  if (!skip_check)
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    result= ((mysql->packet_length=net_safe_read(mysql)) == packet_error ?
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	     1 : 0);
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 end:
  reset_sigpipe(mysql);
  return result;
}


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my_bool
simple_command(MYSQL *mysql,enum enum_server_command command, const char *arg,
	       ulong length, my_bool skip_check)
{
  return advanced_command(mysql, command, NullS, 0, arg, length, skip_check);
}


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static void free_old_query(MYSQL *mysql)
{
  DBUG_ENTER("free_old_query");
  if (mysql->fields)
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    free_root(&mysql->field_alloc,MYF(0));
  init_alloc_root(&mysql->field_alloc,8192,0);	/* Assume rowlength < 8192 */
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  mysql->fields=0;
  mysql->field_count=0;				/* For API */
  DBUG_VOID_RETURN;
}

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#if defined(HAVE_GETPWUID) && defined(NO_GETPWUID_DECL)
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struct passwd *getpwuid(uid_t);
char* getlogin(void);
#endif

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#if !defined(MSDOS) && ! defined(VMS) && !defined(__WIN__) && !defined(OS2)
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static void read_user_name(char *name)
{
  DBUG_ENTER("read_user_name");
  if (geteuid() == 0)
    (void) strmov(name,"root");		/* allow use of surun */
  else
  {
#ifdef HAVE_GETPWUID
    struct passwd *skr;
    const char *str;
    if ((str=getlogin()) == NULL)
    {
      if ((skr=getpwuid(geteuid())) != NULL)
	str=skr->pw_name;
      else if (!(str=getenv("USER")) && !(str=getenv("LOGNAME")) &&
	       !(str=getenv("LOGIN")))
	str="UNKNOWN_USER";
    }
    (void) strmake(name,str,USERNAME_LENGTH);
#elif HAVE_CUSERID
    (void) cuserid(name);
#else
    strmov(name,"UNKNOWN_USER");
#endif
  }
  DBUG_VOID_RETURN;
}

#else /* If MSDOS || VMS */

static void read_user_name(char *name)
{
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  char *str=getenv("USER");		/* ODBC will send user variable */
  strmake(name,str ? str : "ODBC", USERNAME_LENGTH);
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}

#endif

#ifdef __WIN__
static my_bool is_NT(void)
{
  char *os=getenv("OS");
  return (os && !strcmp(os, "Windows_NT")) ? 1 : 0;
}
#endif

/*
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  Expand wildcard to a sql string
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*/

static void
append_wild(char *to, char *end, const char *wild)
{
  end-=5;					/* Some extra */
  if (wild && wild[0])
  {
    to=strmov(to," like '");
    while (*wild && to < end)
    {
      if (*wild == '\\' || *wild == '\'')
	*to++='\\';
      *to++= *wild++;
    }
    if (*wild)					/* Too small buffer */
      *to++='%';				/* Nicer this way */
    to[0]='\'';
    to[1]=0;
  }
}


/**************************************************************************
813
  Init debugging if MYSQL_DEBUG environment variable is found
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**************************************************************************/

void STDCALL
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mysql_debug(const char *debug __attribute__((unused)))
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{
#ifndef DBUG_OFF
  char	*env;
  if (_db_on_)
    return;					/* Already using debugging */
  if (debug)
  {
    DEBUGGER_ON;
    DBUG_PUSH(debug);
  }
  else if ((env = getenv("MYSQL_DEBUG")))
  {
    DEBUGGER_ON;
    DBUG_PUSH(env);
#if !defined(_WINVER) && !defined(WINVER)
    puts("\n-------------------------------------------------------");
    puts("MYSQL_DEBUG found. libmysql started with the following:");
    puts(env);
    puts("-------------------------------------------------------\n");
#else
    {
      char buff[80];
      strmov(strmov(buff,"libmysql: "),env);
      MessageBox((HWND) 0,"Debugging variable MYSQL_DEBUG used",buff,MB_OK);
    }
#endif
  }
#endif
}


/**************************************************************************
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  Close the server connection if we get a SIGPIPE
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   ARGSUSED
**************************************************************************/

static sig_handler
pipe_sig_handler(int sig __attribute__((unused)))
{
  DBUG_PRINT("info",("Hit by signal %d",sig));
#ifdef DONT_REMEMBER_SIGNAL
  (void) signal(SIGPIPE,pipe_sig_handler);
#endif
}


/**************************************************************************
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  Shut down connection
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**************************************************************************/

static void
end_server(MYSQL *mysql)
{
  DBUG_ENTER("end_server");
  if (mysql->net.vio != 0)
  {
    init_sigpipe_variables
    DBUG_PRINT("info",("Net: %s", vio_description(mysql->net.vio)));
    set_sigpipe(mysql);
    vio_delete(mysql->net.vio);
    reset_sigpipe(mysql);
    mysql->net.vio= 0;          /* Marker */
  }
  net_end(&mysql->net);
  free_old_query(mysql);
  DBUG_VOID_RETURN;
}


void STDCALL
mysql_free_result(MYSQL_RES *result)
{
  DBUG_ENTER("mysql_free_result");
  DBUG_PRINT("enter",("mysql_res: %lx",result));
  if (result)
  {
    if (result->handle && result->handle->status == MYSQL_STATUS_USE_RESULT)
    {
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      DBUG_PRINT("warning",("Not all rows in set where read; Ignoring rows"));
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      for (;;)
      {
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	ulong pkt_len;
	if ((pkt_len=net_safe_read(result->handle)) == packet_error)
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	  break;
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	if (pkt_len <= 8 && result->handle->net.read_pos[0] == 254)
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	  break;				/* End of data */
      }
      result->handle->status=MYSQL_STATUS_READY;
    }
    free_rows(result->data);
    if (result->fields)
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      free_root(&result->field_alloc,MYF(0));
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    if (result->row)
      my_free((gptr) result->row,MYF(0));
    my_free((gptr) result,MYF(0));
  }
  DBUG_VOID_RETURN;
}


/****************************************************************************
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  Get options from my.cnf
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****************************************************************************/

static const char *default_options[]=
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{
  "port","socket","compress","password","pipe", "timeout", "user",
  "init-command", "host", "database", "debug", "return-found-rows",
  "ssl-key" ,"ssl-cert" ,"ssl-ca" ,"ssl-capath",
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  "character-sets-dir", "default-character-set", "interactive-timeout",
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  "connect-timeout", "local-infile", "disable-local-infile",
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  "replication-probe", "enable-reads-from-master", "repl-parse-query",
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  "ssl-cipher","protocol","shared_memory_base_name",
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 NullS
};

static TYPELIB option_types={array_elements(default_options)-1,
			     "options",default_options};

static void mysql_read_default_options(struct st_mysql_options *options,
				       const char *filename,const char *group)
{
  int argc;
  char *argv_buff[1],**argv;
  const char *groups[3];
  DBUG_ENTER("mysql_read_default_options");
  DBUG_PRINT("enter",("file: %s  group: %s",filename,group ? group :"NULL"));

  argc=1; argv=argv_buff; argv_buff[0]= (char*) "client";
  groups[0]= (char*) "client"; groups[1]= (char*) group; groups[2]=0;

  load_defaults(filename, groups, &argc, &argv);
  if (argc != 1)				/* If some default option */
  {
    char **option=argv;
    while (*++option)
    {
      /* DBUG_PRINT("info",("option: %s",option[0])); */
      if (option[0][0] == '-' && option[0][1] == '-')
      {
	char *end=strcend(*option,'=');
	char *opt_arg=0;
	if (*end)
	{
	  opt_arg=end+1;
	  *end=0;				/* Remove '=' */
	}
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	/* Change all '_' in variable name to '-' */
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	for (end= *option ; *(end= strcend(end,'_')) ; )
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	  *end= '-';
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	switch (find_type(*option+2,&option_types,2)) {
	case 1:				/* port */
	  if (opt_arg)
	    options->port=atoi(opt_arg);
	  break;
	case 2:				/* socket */
	  if (opt_arg)
	  {
	    my_free(options->unix_socket,MYF(MY_ALLOW_ZERO_PTR));
	    options->unix_socket=my_strdup(opt_arg,MYF(MY_WME));
	  }
	  break;
	case 3:				/* compress */
	  options->compress=1;
	  break;
	case 4:				/* password */
	  if (opt_arg)
	  {
	    my_free(options->password,MYF(MY_ALLOW_ZERO_PTR));
	    options->password=my_strdup(opt_arg,MYF(MY_WME));
	  }
	  break;
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        case 5:
          options->protocol = MYSQL_PROTOCOL_PIPE;
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	case 20:			/* connect_timeout */
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	case 6:				/* timeout */
	  if (opt_arg)
	    options->connect_timeout=atoi(opt_arg);
	  break;
	case 7:				/* user */
	  if (opt_arg)
	  {
	    my_free(options->user,MYF(MY_ALLOW_ZERO_PTR));
	    options->user=my_strdup(opt_arg,MYF(MY_WME));
	  }
	  break;
	case 8:				/* init-command */
	  if (opt_arg)
	  {
	    my_free(options->init_command,MYF(MY_ALLOW_ZERO_PTR));
	    options->init_command=my_strdup(opt_arg,MYF(MY_WME));
	  }
	  break;
	case 9:				/* host */
	  if (opt_arg)
	  {
	    my_free(options->host,MYF(MY_ALLOW_ZERO_PTR));
	    options->host=my_strdup(opt_arg,MYF(MY_WME));
	  }
	  break;
	case 10:			/* database */
	  if (opt_arg)
	  {
	    my_free(options->db,MYF(MY_ALLOW_ZERO_PTR));
	    options->db=my_strdup(opt_arg,MYF(MY_WME));
	  }
	  break;
	case 11:			/* debug */
	  mysql_debug(opt_arg ? opt_arg : "d:t:o,/tmp/client.trace");
	  break;
	case 12:			/* return-found-rows */
	  options->client_flag|=CLIENT_FOUND_ROWS;
	  break;
#ifdef HAVE_OPENSSL
	case 13:			/* ssl_key */
	  my_free(options->ssl_key, MYF(MY_ALLOW_ZERO_PTR));
          options->ssl_key = my_strdup(opt_arg, MYF(MY_WME));
          break;
	case 14:			/* ssl_cert */
	  my_free(options->ssl_cert, MYF(MY_ALLOW_ZERO_PTR));
          options->ssl_cert = my_strdup(opt_arg, MYF(MY_WME));
          break;
	case 15:			/* ssl_ca */
	  my_free(options->ssl_ca, MYF(MY_ALLOW_ZERO_PTR));
          options->ssl_ca = my_strdup(opt_arg, MYF(MY_WME));
          break;
	case 16:			/* ssl_capath */
	  my_free(options->ssl_capath, MYF(MY_ALLOW_ZERO_PTR));
          options->ssl_capath = my_strdup(opt_arg, MYF(MY_WME));
          break;
#else
	case 13:				/* Ignore SSL options */
	case 14:
	case 15:
	case 16:
	  break;
#endif /* HAVE_OPENSSL */
	case 17:			/* charset-lib */
	  my_free(options->charset_dir,MYF(MY_ALLOW_ZERO_PTR));
          options->charset_dir = my_strdup(opt_arg, MYF(MY_WME));
	  break;
	case 18:
	  my_free(options->charset_name,MYF(MY_ALLOW_ZERO_PTR));
          options->charset_name = my_strdup(opt_arg, MYF(MY_WME));
	  break;
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	case 19:				/* Interactive-timeout */
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	  options->client_flag|= CLIENT_INTERACTIVE;
	  break;
	case 21:
	  if (!opt_arg || atoi(opt_arg) != 0)
	    options->client_flag|= CLIENT_LOCAL_FILES;
	  else
	    options->client_flag&= ~CLIENT_LOCAL_FILES;
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	  break;
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	case 22:
	  options->client_flag&= CLIENT_LOCAL_FILES;
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          break;
	case 23:  /* replication probe */
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	  options->rpl_probe= 1;
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	  break;
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	case 24: /* enable-reads-from-master */
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	  options->no_master_reads= 0;
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	  break;
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	case 25: /* repl-parse-query */
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	  options->rpl_parse= 1;
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	  break;
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        case 27:/* protocol */
          if ((options->protocol = find_type(opt_arg, &sql_protocol_typelib,0)) == ~(ulong) 0)
          {
            fprintf(stderr, "Unknown option to protocol: %s\n", opt_arg);
            exit(1);
          }
          break;
        case 28: /*shared_memory_base_name*/
#ifdef HAVE_SMEM
          if (options->shared_memory_base_name != def_shared_memory_base_name)
            my_free(options->shared_memory_base_name,MYF(MY_ALLOW_ZERO_PTR));
          options->shared_memory_base_name=my_strdup(opt_arg,MYF(MY_WME));
#endif
          break;        
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	default:
	  DBUG_PRINT("warning",("unknown option: %s",option[0]));
	}
      }
    }
  }
  free_defaults(argv);
  DBUG_VOID_RETURN;
}


/***************************************************************************
1110
  Change field rows to field structs
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***************************************************************************/

static MYSQL_FIELD *
unpack_fields(MYSQL_DATA *data,MEM_ROOT *alloc,uint fields,
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	      my_bool default_value, uint server_capabilities)
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{
  MYSQL_ROWS	*row;
  MYSQL_FIELD	*field,*result;
  DBUG_ENTER("unpack_fields");

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  field=result=(MYSQL_FIELD*) alloc_root(alloc,
					 (uint) sizeof(MYSQL_FIELD)*fields);
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  if (!result)
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  {
    free_rows(data);				/* Free old data */
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    DBUG_RETURN(0);
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  }
  if (server_capabilities & CLIENT_PROTOCOL_41)
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  {
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    /* server is 4.1, and returns the new field result format */
    for (row=data->data; row ; row = row->next,field++)
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    {
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      field->db       = strdup_root(alloc,(char*) row->data[0]);
      field->table    = strdup_root(alloc,(char*) row->data[1]);
      field->org_table= strdup_root(alloc,(char*) row->data[2]);
      field->name     = strdup_root(alloc,(char*) row->data[3]);
      field->org_name = strdup_root(alloc,(char*) row->data[4]);
      field->length   = (uint) uint3korr(row->data[5]);
      field->type     = (enum enum_field_types) (uchar) row->data[6][0];

      field->flags=   uint2korr(row->data[7]);
      field->decimals=(uint) (uchar) row->data[7][2];

      if (INTERNAL_NUM_FIELD(field))
        field->flags|= NUM_FLAG;
      if (default_value && row->data[8])
        field->def=strdup_root(alloc,(char*) row->data[8]);
      else
        field->def=0;
      field->max_length= 0;
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    }
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  }
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#ifndef DELETE_SUPPORT_OF_4_0_PROTOCOL
  else
1155
  {
1156
    /* old protocol, for backward compatibility */
1157
    for (row=data->data; row ; row = row->next,field++)
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    {
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      field->org_table= field->table=  strdup_root(alloc,(char*) row->data[0]);
      field->name=   strdup_root(alloc,(char*) row->data[1]);
      field->length= (uint) uint3korr(row->data[2]);
      field->type=   (enum enum_field_types) (uchar) row->data[3][0];
      
      if (server_capabilities & CLIENT_LONG_FLAG)
      {
        field->flags=   uint2korr(row->data[4]);
        field->decimals=(uint) (uchar) row->data[4][2];
      }
      else
      {
        field->flags=   (uint) (uchar) row->data[4][0];
        field->decimals=(uint) (uchar) row->data[4][1];
      }
      if (INTERNAL_NUM_FIELD(field))
        field->flags|= NUM_FLAG;
      if (default_value && row->data[5])
        field->def=strdup_root(alloc,(char*) row->data[5]);
      else
        field->def=0;
      field->max_length= 0;
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    }
  }
1183
#endif /* DELETE_SUPPORT_OF_4_0_PROTOCOL */
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  free_rows(data);				/* Free old data */
  DBUG_RETURN(result);
}


/* Read all rows (fields or data) from server */

static MYSQL_DATA *read_rows(MYSQL *mysql,MYSQL_FIELD *mysql_fields,
			     uint fields)
{
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  uint	field;
  ulong pkt_len;
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  ulong len;
  uchar *cp;
  char	*to;
  MYSQL_DATA *result;
  MYSQL_ROWS **prev_ptr,*cur;
  NET *net = &mysql->net;
  DBUG_ENTER("read_rows");

1204
  if ((pkt_len= net_safe_read(mysql)) == packet_error)
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    DBUG_RETURN(0);
  if (!(result=(MYSQL_DATA*) my_malloc(sizeof(MYSQL_DATA),
				       MYF(MY_WME | MY_ZEROFILL))))
  {
    net->last_errno=CR_OUT_OF_MEMORY;
    strmov(net->last_error,ER(net->last_errno));
    DBUG_RETURN(0);
  }
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  init_alloc_root(&result->alloc,8192,0);	/* Assume rowlength < 8192 */
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  result->alloc.min_malloc=sizeof(MYSQL_ROWS);
  prev_ptr= &result->data;
  result->rows=0;
  result->fields=fields;

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  /*
    The last EOF packet is either a single 254 character or (in MySQL 4.1)
    254 followed by 1-7 status bytes.

    This doesn't conflict with normal usage of 254 which stands for a
    string where the length of the string is 8 bytes. (see net_field_length())
  */

  while (*(cp=net->read_pos) != 254 || pkt_len >= 8)
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  {
    result->rows++;
    if (!(cur= (MYSQL_ROWS*) alloc_root(&result->alloc,
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					sizeof(MYSQL_ROWS))) ||
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	!(cur->data= ((MYSQL_ROW)
		      alloc_root(&result->alloc,
1234
				 (fields+1)*sizeof(char *)+pkt_len))))
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    {
      free_rows(result);
      net->last_errno=CR_OUT_OF_MEMORY;
      strmov(net->last_error,ER(net->last_errno));
      DBUG_RETURN(0);
    }
    *prev_ptr=cur;
    prev_ptr= &cur->next;
    to= (char*) (cur->data+fields+1);
    for (field=0 ; field < fields ; field++)
    {
      if ((len=(ulong) net_field_length(&cp)) == NULL_LENGTH)
      {						/* null field */
	cur->data[field] = 0;
      }
      else
      {
	cur->data[field] = to;
	memcpy(to,(char*) cp,len); to[len]=0;
	to+=len+1;
	cp+=len;
	if (mysql_fields)
	{
	  if (mysql_fields[field].max_length < len)
	    mysql_fields[field].max_length=len;
	}
      }
    }
    cur->data[field]=to;			/* End of last field */
    if ((pkt_len=net_safe_read(mysql)) == packet_error)
    {
      free_rows(result);
      DBUG_RETURN(0);
    }
  }
  *prev_ptr=0;					/* last pointer is null */
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  if (pkt_len > 1)				/* MySQL 4.1 protocol */
  {
    mysql->warning_count= uint2korr(cp+1);
    DBUG_PRINT("info",("warning_count:  %ld", mysql->warning_count));
  }
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  DBUG_PRINT("exit",("Got %d rows",result->rows));
  DBUG_RETURN(result);
}


/*
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  Read one row. Uses packet buffer as storage for fields.
  When next packet is read, the previous field values are destroyed
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*/


static int
read_one_row(MYSQL *mysql,uint fields,MYSQL_ROW row, ulong *lengths)
{
  uint field;
  ulong pkt_len,len;
  uchar *pos,*prev_pos;

1294
  if ((pkt_len=net_safe_read(mysql)) == packet_error)
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    return -1;
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  if (pkt_len <= 8 && mysql->net.read_pos[0] == 254)
  {
    if (pkt_len > 1)				/* MySQL 4.1 protocol */
      mysql->warning_count= uint2korr(mysql->net.read_pos+1);
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    return 1;				/* End of data */
1301
  }
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  prev_pos= 0;				/* allowed to write at packet[-1] */
  pos=mysql->net.read_pos;
  for (field=0 ; field < fields ; field++)
  {
    if ((len=(ulong) net_field_length(&pos)) == NULL_LENGTH)
    {						/* null field */
      row[field] = 0;
      *lengths++=0;
    }
    else
    {
      row[field] = (char*) pos;
      pos+=len;
      *lengths++=len;
    }
    if (prev_pos)
      *prev_pos=0;				/* Terminate prev field */
    prev_pos=pos;
  }
  row[field]=(char*) prev_pos+1;		/* End of last field */
  *prev_pos=0;					/* Terminate last field */
  return 0;
}

1326
/* perform query on master */
1327
my_bool STDCALL mysql_master_query(MYSQL *mysql, const char *q,
1328
			       unsigned long length)
1329
{
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  DBUG_ENTER("mysql_master_query");
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  if (mysql_master_send_query(mysql, q, length))
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    DBUG_RETURN(1);
  DBUG_RETURN(mysql_read_query_result(mysql));
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}

1336 1337
my_bool STDCALL mysql_master_send_query(MYSQL *mysql, const char *q,
					unsigned long length)
1338
{
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  MYSQL *master = mysql->master;
  DBUG_ENTER("mysql_master_send_query");
1341
  if (!master->net.vio && !mysql_real_connect(master,0,0,0,0,0,0,0))
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    DBUG_RETURN(1);
1343
  mysql->last_used_con = master;
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  DBUG_RETURN(simple_command(master, COM_QUERY, q, length, 1));
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}

1347

1348
/* perform query on slave */  
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my_bool STDCALL mysql_slave_query(MYSQL *mysql, const char *q,
				  unsigned long length)
1351
{
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  DBUG_ENTER("mysql_slave_query");
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  if (mysql_slave_send_query(mysql, q, length))
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    DBUG_RETURN(1);
  DBUG_RETURN(mysql_read_query_result(mysql));
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}

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my_bool STDCALL mysql_slave_send_query(MYSQL *mysql, const char *q,
1360
				   unsigned long length)
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{
  MYSQL* last_used_slave, *slave_to_use = 0;
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  DBUG_ENTER("mysql_slave_send_query");
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  if ((last_used_slave = mysql->last_used_slave))
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    slave_to_use = last_used_slave->next_slave;
  else
    slave_to_use = mysql->next_slave;
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  /*
    Next_slave is always safe to use - we have a circular list of slaves
    if there are no slaves, mysql->next_slave == mysql
1372
  */
1373
  mysql->last_used_con = mysql->last_used_slave = slave_to_use;
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  if (!slave_to_use->net.vio && !mysql_real_connect(slave_to_use, 0,0,0,
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						   0,0,0,0))
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    DBUG_RETURN(1);
  DBUG_RETURN(simple_command(slave_to_use, COM_QUERY, q, length, 1));
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}

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/* enable/disable parsing of all queries to decide
   if they go on master or slave */
void STDCALL mysql_enable_rpl_parse(MYSQL* mysql)
{
  mysql->options.rpl_parse = 1;
}

void STDCALL mysql_disable_rpl_parse(MYSQL* mysql)
{
  mysql->options.rpl_parse = 0;
}

/* get the value of the parse flag */  
int STDCALL mysql_rpl_parse_enabled(MYSQL* mysql)
{
  return mysql->options.rpl_parse;
}

/*  enable/disable reads from master */
void STDCALL mysql_enable_reads_from_master(MYSQL* mysql)
{
  mysql->options.no_master_reads = 0;
}

void STDCALL mysql_disable_reads_from_master(MYSQL* mysql)
{
  mysql->options.no_master_reads = 1;
}

/* get the value of the master read flag */  
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my_bool STDCALL mysql_reads_from_master_enabled(MYSQL* mysql)
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{
  return !(mysql->options.no_master_reads);
}

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/*
  We may get an error while doing replication internals.
  In this case, we add a special explanation to the original
  error
1421
*/
1422 1423

static void expand_error(MYSQL* mysql, int error)
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{
  char tmp[MYSQL_ERRMSG_SIZE];
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  char *p;
  uint err_length;
  strmake(tmp, mysql->net.last_error, MYSQL_ERRMSG_SIZE-1);
  p = strmake(mysql->net.last_error, ER(error), MYSQL_ERRMSG_SIZE-1);
  err_length= (uint) (p - mysql->net.last_error);
  strmake(p, tmp, MYSQL_ERRMSG_SIZE-1 - err_length);
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  mysql->net.last_errno = error;
}

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/*
  This function assumes we have just called SHOW SLAVE STATUS and have
  read the given result and row
1438
*/
1439

1440
static my_bool get_master(MYSQL* mysql, MYSQL_RES* res, MYSQL_ROW row)
1441 1442
{
  MYSQL* master;
1443
  DBUG_ENTER("get_master");
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  if (mysql_num_fields(res) < 3)
1445
    DBUG_RETURN(1); /* safety */
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1447
  /* use the same username and password as the original connection */
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  if (!(master = spawn_init(mysql, row[0], atoi(row[2]), 0, 0)))
1449
    DBUG_RETURN(1);
1450
  mysql->master = master;
1451
  DBUG_RETURN(0);
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}

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/*
  Assuming we already know that mysql points to a master connection,
  retrieve all the slaves
1458
*/
1459

1460
static my_bool get_slaves_from_master(MYSQL* mysql)
1461
{
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  MYSQL_RES* res = 0;
  MYSQL_ROW row;
1464
  my_bool error = 1;
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  int has_auth_info;
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  int port_ind;
1467
  DBUG_ENTER("get_slaves_from_master");
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  if (!mysql->net.vio && !mysql_real_connect(mysql,0,0,0,0,0,0,0))
  {
    expand_error(mysql, CR_PROBE_MASTER_CONNECT);
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    DBUG_RETURN(1);
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  }

  if (mysql_query(mysql, "SHOW SLAVE HOSTS") ||
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      !(res = mysql_store_result(mysql)))
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  {
    expand_error(mysql, CR_PROBE_SLAVE_HOSTS);
1479
    DBUG_RETURN(1);
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  }

1482
  switch (mysql_num_fields(res)) {
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  case 5:
    has_auth_info = 0;
    port_ind=2;
    break;
  case 7:
    has_auth_info = 1;
    port_ind=4;
    break;
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  default:
    goto err;
  }

  while ((row = mysql_fetch_row(res)))
  {
    MYSQL* slave;
    const char* tmp_user, *tmp_pass;

    if (has_auth_info)
    {
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      tmp_user = row[2];
      tmp_pass = row[3];
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    }
    else
    {
      tmp_user = mysql->user;
      tmp_pass = mysql->passwd;
    }

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    if (!(slave = spawn_init(mysql, row[1], atoi(row[port_ind]),
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			    tmp_user, tmp_pass)))
      goto err;
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    /* Now add slave into the circular linked list */
    slave->next_slave = mysql->next_slave;
    mysql->next_slave = slave;
  }
  error = 0;
err:
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1521
  if (res)
1522
   mysql_free_result(res);
1523
  DBUG_RETURN(error);
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}

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1527
my_bool STDCALL mysql_rpl_probe(MYSQL* mysql)
1528
{
1529
  MYSQL_RES *res= 0;
1530
  MYSQL_ROW row;
1531
  my_bool error= 1;
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  DBUG_ENTER("mysql_rpl_probe");

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  /*
    First determine the replication role of the server we connected to
    the most reliable way to do this is to run SHOW SLAVE STATUS and see
    if we have a non-empty master host. This is still not fool-proof -
    it is not a sin to have a master that has a dormant slave thread with
    a non-empty master host. However, it is more reliable to check 
    for empty master than whether the slave thread is actually running
1541
  */
1542
  if (mysql_query(mysql, "SHOW SLAVE STATUS") ||
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      !(res = mysql_store_result(mysql)))
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  {
    expand_error(mysql, CR_PROBE_SLAVE_STATUS);
1546
    DBUG_RETURN(1);
1547
  }
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  row= mysql_fetch_row(res);
  /*
    Check master host for emptiness/NULL
    For MySQL 4.0 it's enough to check for row[0]
  */
  if (row && row[0] && *(row[0]))
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  {
    /* this is a slave, ask it for the master */
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    if (get_master(mysql, res, row) || get_slaves_from_master(mysql))
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      goto err;
  }
  else
  {
    mysql->master = mysql;
1563
    if (get_slaves_from_master(mysql))
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      goto err;
  }

  error = 0;
err:
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  if (res)
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    mysql_free_result(res);
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  DBUG_RETURN(error);
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}


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/*
  Make a not so fool-proof decision on where the query should go, to
  the master or the slave. Ideally the user should always make this
  decision himself with mysql_master_query() or mysql_slave_query().
  However, to be able to more easily port the old code, we support the
  option of an educated guess - this should work for most applications,
  however, it may make the wrong decision in some particular cases. If
  that happens, the user would have to change the code to call
  mysql_master_query() or mysql_slave_query() explicitly in the place
  where we have made the wrong decision
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*/
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enum mysql_rpl_type
STDCALL mysql_rpl_query_type(const char* q, int len)
1589
{
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  const char *q_end= q + len;
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  for (; q < q_end; ++q)
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  {
    char c;
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    if (my_isalpha(system_charset_info, (c= *q)))
1595
    {
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      switch (my_tolower(system_charset_info,c)) {
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      case 'i':  /* insert */
      case 'u':  /* update or unlock tables */
      case 'l':  /* lock tables or load data infile */
      case 'd':  /* drop or delete */
      case 'a':  /* alter */
	return MYSQL_RPL_MASTER;
      case 'c':  /* create or check */
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	return my_tolower(system_charset_info,q[1]) == 'h' ? MYSQL_RPL_ADMIN : 
	  MYSQL_RPL_MASTER;
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      case 's': /* select or show */
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	return my_tolower(system_charset_info,q[1]) == 'h' ? MYSQL_RPL_ADMIN :
	  MYSQL_RPL_SLAVE;
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      case 'f': /* flush */
      case 'r': /* repair */
      case 'g': /* grant */
	return MYSQL_RPL_ADMIN;
      default:
	return MYSQL_RPL_SLAVE;
      }
    }
1617
  }
1618
  return MYSQL_RPL_MASTER;		/* By default, send to master */
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}


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/****************************************************************************
1623
  Init MySQL structure or allocate one
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****************************************************************************/

MYSQL * STDCALL
mysql_init(MYSQL *mysql)
{
  mysql_once_init();
  if (!mysql)
  {
    if (!(mysql=(MYSQL*) my_malloc(sizeof(*mysql),MYF(MY_WME | MY_ZEROFILL))))
      return 0;
    mysql->free_me=1;
  }
  else
    bzero((char*) (mysql),sizeof(*(mysql)));
1638
  mysql->options.connect_timeout=CONNECT_TIMEOUT;
1639
  mysql->last_used_con = mysql->next_slave = mysql->master = mysql;
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  /*
    By default, we are a replication pivot. The caller must reset it
    after we return if this is not the case.
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  */
  mysql->rpl_pivot = 1; 
1646
#if defined(SIGPIPE) && defined(THREAD) && !defined(__WIN__)
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  if (!((mysql)->client_flag & CLIENT_IGNORE_SIGPIPE))
    (void) signal(SIGPIPE,pipe_sig_handler);
#endif
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/*
  Only enable LOAD DATA INFILE by default if configured with
1653
  --enable-local-infile
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*/
#ifdef ENABLED_LOCAL_INFILE
  mysql->options.client_flag|= CLIENT_LOCAL_FILES;
#endif
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#ifdef HAVE_SMEM
  mysql->options.shared_memory_base_name=(char*)def_shared_memory_base_name;
#endif    
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  return mysql;
}


static void mysql_once_init()
{
  if (!mysql_client_init)
  {
    mysql_client_init=1;
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    org_my_init_done=my_init_done;
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    my_init();					/* Will init threads */
    init_client_errs();
    if (!mysql_port)
    {
      mysql_port = MYSQL_PORT;
#ifndef MSDOS
      {
	struct servent *serv_ptr;
	char	*env;
	if ((serv_ptr = getservbyname("mysql", "tcp")))
	  mysql_port = (uint) ntohs((ushort) serv_ptr->s_port);
	if ((env = getenv("MYSQL_TCP_PORT")))
	  mysql_port =(uint) atoi(env);
      }
#endif
    }
    if (!mysql_unix_port)
    {
      char *env;
#ifdef __WIN__
      mysql_unix_port = (char*) MYSQL_NAMEDPIPE;
#else
      mysql_unix_port = (char*) MYSQL_UNIX_ADDR;
#endif
      if ((env = getenv("MYSQL_UNIX_PORT")))
	mysql_unix_port = env;
    }
    mysql_debug(NullS);
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#if defined(SIGPIPE) && !defined(THREAD) && !defined(__WIN__)
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    (void) signal(SIGPIPE,SIG_IGN);
#endif
  }
#ifdef THREAD
  else
    my_thread_init();         /* Init if new thread */
#endif
}

/**************************************************************************
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  Fill in SSL part of MYSQL structure and set 'use_ssl' flag.
  NB! Errors are not reported until you do mysql_real_connect.
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**************************************************************************/

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#define strdup_if_not_null(A) (A) == 0 ? 0 : my_strdup((A),MYF(MY_WME))

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my_bool STDCALL
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mysql_ssl_set(MYSQL *mysql __attribute__((unused)) ,
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	      const char *key __attribute__((unused)), 
	      const char *cert __attribute__((unused)),
	      const char *ca __attribute__((unused)), 
	      const char *capath __attribute__((unused)),
	      const char *cipher __attribute__((unused)))
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{
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#ifdef HAVE_OPENSSL
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  mysql->options.ssl_key=    strdup_if_not_null(key);
  mysql->options.ssl_cert=   strdup_if_not_null(cert);
  mysql->options.ssl_ca=     strdup_if_not_null(ca);
  mysql->options.ssl_capath= strdup_if_not_null(capath);
  mysql->options.ssl_cipher= strdup_if_not_null(cipher);
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#endif
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  return 0;
}

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/**************************************************************************
  Free strings in the SSL structure and clear 'use_ssl' flag.
  NB! Errors are not reported until you do mysql_real_connect.
**************************************************************************/

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static void
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mysql_ssl_free(MYSQL *mysql __attribute__((unused)))
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{
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#ifdef HAVE_OPENSSL
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  my_free(mysql->options.ssl_key, MYF(MY_ALLOW_ZERO_PTR));
  my_free(mysql->options.ssl_cert, MYF(MY_ALLOW_ZERO_PTR));
  my_free(mysql->options.ssl_ca, MYF(MY_ALLOW_ZERO_PTR));
  my_free(mysql->options.ssl_capath, MYF(MY_ALLOW_ZERO_PTR));
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  my_free(mysql->options.ssl_cipher, MYF(MY_ALLOW_ZERO_PTR));
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  my_free(mysql->connector_fd,MYF(MY_ALLOW_ZERO_PTR));
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  mysql->options.ssl_key = 0;
  mysql->options.ssl_cert = 0;
  mysql->options.ssl_ca = 0;
  mysql->options.ssl_capath = 0;
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  mysql->options.ssl_cipher= 0;
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  mysql->options.use_ssl = FALSE;
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  mysql->connector_fd = 0;
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#endif /* HAVE_OPENSSL */
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}
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/**************************************************************************
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  Connect to sql server
  If host == 0 then use localhost
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**************************************************************************/

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#ifdef USE_OLD_FUNCTIONS
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MYSQL * STDCALL
mysql_connect(MYSQL *mysql,const char *host,
	      const char *user, const char *passwd)
{
  MYSQL *res;
  mysql=mysql_init(mysql);			/* Make it thread safe */
  {
    DBUG_ENTER("mysql_connect");
    if (!(res=mysql_real_connect(mysql,host,user,passwd,NullS,0,NullS,0)))
    {
      if (mysql->free_me)
	my_free((gptr) mysql,MYF(0));
    }
    DBUG_RETURN(res);
  }
}
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#endif
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/*
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  Note that the mysql argument must be initialized with mysql_init()
  before calling mysql_real_connect !
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*/

MYSQL * STDCALL
mysql_real_connect(MYSQL *mysql,const char *host, const char *user,
		   const char *passwd, const char *db,
		   uint port, const char *unix_socket,uint client_flag)
{
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  char		buff[NAME_LEN+USERNAME_LENGTH+100],charset_name_buff[16];
  char		*end,*host_info,*charset_name;
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  my_socket	sock;
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  uint32	ip_addr;
  struct	sockaddr_in sock_addr;
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  ulong		pkt_length;
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  NET		*net= &mysql->net;
#ifdef __WIN__
  HANDLE	hPipe=INVALID_HANDLE_VALUE;
#endif
#ifdef HAVE_SYS_UN_H
  struct	sockaddr_un UNIXaddr;
#endif
  init_sigpipe_variables
  DBUG_ENTER("mysql_real_connect");

  DBUG_PRINT("enter",("host: %s  db: %s  user: %s",
		      host ? host : "(Null)",
		      db ? db : "(Null)",
		      user ? user : "(Null)"));

  /* Don't give sigpipe errors if the client doesn't want them */
  set_sigpipe(mysql);
  net->vio = 0;				/* If something goes wrong */
  /* use default options */
  if (mysql->options.my_cnf_file || mysql->options.my_cnf_group)
  {
    mysql_read_default_options(&mysql->options,
			       (mysql->options.my_cnf_file ?
				mysql->options.my_cnf_file : "my"),
			       mysql->options.my_cnf_group);
    my_free(mysql->options.my_cnf_file,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->options.my_cnf_group,MYF(MY_ALLOW_ZERO_PTR));
    mysql->options.my_cnf_file=mysql->options.my_cnf_group=0;
  }

  /* Some empty-string-tests are done because of ODBC */
  if (!host || !host[0])
    host=mysql->options.host;
  if (!user || !user[0])
    user=mysql->options.user;
  if (!passwd)
  {
    passwd=mysql->options.password;
#ifndef DONT_USE_MYSQL_PWD
    if (!passwd)
      passwd=getenv("MYSQL_PWD");  /* get it from environment (haneke) */
#endif
  }
  if (!db || !db[0])
    db=mysql->options.db;
  if (!port)
    port=mysql->options.port;
  if (!unix_socket)
    unix_socket=mysql->options.unix_socket;

  mysql->reconnect=1;			/* Reconnect as default */
  mysql->server_status=SERVER_STATUS_AUTOCOMMIT;

  /*
  ** Grab a socket and connect it to the server
  */
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#if defined(HAVE_SMEM)
  if ((!mysql->options.protocol || mysql->options.protocol == MYSQL_PROTOCOL_MEMORY)&&
      (!host || !strcmp(host,LOCAL_HOST)))
  {
    if ((create_shared_memory(mysql,net, mysql->options.connect_timeout)) == 
          INVALID_HANDLE_VALUE)
    {
      DBUG_PRINT("error",
        ("host: '%s'  socket: '%s'  shared memory: %s  have_tcpip: %d",
          host ? host : "<null>",
          unix_socket ? unix_socket : "<null>",
          (int) mysql->options.shared_memory_base_name,
          (int) have_tcpip));
	  if (mysql->options.protocol == MYSQL_PROTOCOL_MEMORY)
	    goto error;		
/* 
Try also with PIPE or TCP/IP
*/
    }  
    else
    {
      mysql->options.protocol=MYSQL_PROTOCOL_MEMORY;
      sock=0;
      unix_socket = 0;
      host=mysql->options.shared_memory_base_name;
      host_info=(char*) ER(CR_SHARED_MEMORY_CONNECTION);
    }
  } else
#endif //HAVE_SMEM
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#if defined(HAVE_SYS_UN_H)
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  if ((!mysql->options.protocol || mysql->options.protocol == MYSQL_PROTOCOL_SOCKET)&&
     (!host || !strcmp(host,LOCAL_HOST)) && (unix_socket || mysql_unix_port))
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  {
    host=LOCAL_HOST;
    if (!unix_socket)
      unix_socket=mysql_unix_port;
    host_info=(char*) ER(CR_LOCALHOST_CONNECTION);
    DBUG_PRINT("info",("Using UNIX sock '%s'",unix_socket));
    if ((sock = socket(AF_UNIX,SOCK_STREAM,0)) == SOCKET_ERROR)
    {
      net->last_errno=CR_SOCKET_CREATE_ERROR;
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      sprintf(net->last_error,ER(net->last_errno),socket_errno);
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      goto error;
    }
    net->vio = vio_new(sock, VIO_TYPE_SOCKET, TRUE);
    bzero((char*) &UNIXaddr,sizeof(UNIXaddr));
    UNIXaddr.sun_family = AF_UNIX;
    strmov(UNIXaddr.sun_path, unix_socket);
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    if (my_connect(sock,(struct sockaddr *) &UNIXaddr, sizeof(UNIXaddr),
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		   mysql->options.connect_timeout))
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    {
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      DBUG_PRINT("error",("Got error %d on connect to local server",socket_errno));
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      net->last_errno=CR_CONNECTION_ERROR;
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      sprintf(net->last_error,ER(net->last_errno),unix_socket,socket_errno);
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      goto error;
    }
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    else
      mysql->options.protocol=MYSQL_PROTOCOL_SOCKET;
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  }
  else
#elif defined(__WIN__)
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  if ((!mysql->options.protocol || mysql->options.protocol == MYSQL_PROTOCOL_PIPE)&&
      ((unix_socket || !host && is_NT() ||
	host && !strcmp(host,LOCAL_HOST_NAMEDPIPE) ||!have_tcpip))&&(!net->vio))
  {
    sock=0;
    if ((hPipe=create_named_pipe(net, mysql->options.connect_timeout,
		   (char**) &host, (char**) &unix_socket)) ==
                    INVALID_HANDLE_VALUE)
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    {
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      DBUG_PRINT("error",
                ("host: '%s'  socket: '%s'  have_tcpip: %d",
                host ? host : "<null>",
                unix_socket ? unix_socket : "<null>",
                (int) have_tcpip));
      if (mysql->options.protocol == MYSQL_PROTOCOL_PIPE ||
          (host && !strcmp(host,LOCAL_HOST_NAMEDPIPE)) ||
          (unix_socket && !strcmp(unix_socket,MYSQL_NAMEDPIPE)))
            goto error;		
	    /* 
            Try also with TCP/IP 
            */
    }
    else
    {
      net->vio=vio_new_win32pipe(hPipe);
      sprintf(host_info=buff, ER(CR_NAMEDPIPE_CONNECTION), host,
        unix_socket);
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    }
  }
#endif
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  if ((!mysql->options.protocol || mysql->options.protocol == MYSQL_PROTOCOL_TCP)&&(!net->vio))
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  {
    unix_socket=0;				/* This is not used */
    if (!port)
      port=mysql_port;
    if (!host)
      host=LOCAL_HOST;
    sprintf(host_info=buff,ER(CR_TCP_CONNECTION),host);
    DBUG_PRINT("info",("Server name: '%s'.  TCP sock: %d", host,port));
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    /* _WIN64 ;  Assume that the (int) range is enough for socket() */
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    if ((sock = (my_socket) socket(AF_INET,SOCK_STREAM,0)) == SOCKET_ERROR)
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    {
      net->last_errno=CR_IPSOCK_ERROR;
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      sprintf(net->last_error,ER(net->last_errno),socket_errno);
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      goto error;
    }
    net->vio = vio_new(sock,VIO_TYPE_TCPIP,FALSE);
    bzero((char*) &sock_addr,sizeof(sock_addr));
    sock_addr.sin_family = AF_INET;

    /*
    ** The server name may be a host name or IP address
    */

    if ((int) (ip_addr = inet_addr(host)) != (int) INADDR_NONE)
    {
      memcpy_fixed(&sock_addr.sin_addr,&ip_addr,sizeof(ip_addr));
    }
    else
    {
      int tmp_errno;
      struct hostent tmp_hostent,*hp;
      char buff2[GETHOSTBYNAME_BUFF_SIZE];
      hp = my_gethostbyname_r(host,&tmp_hostent,buff2,sizeof(buff2),
			      &tmp_errno);
      if (!hp)
      {
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	my_gethostbyname_r_free();
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	net->last_errno=CR_UNKNOWN_HOST;
	sprintf(net->last_error, ER(CR_UNKNOWN_HOST), host, tmp_errno);
	goto error;
      }
      memcpy(&sock_addr.sin_addr,hp->h_addr, (size_t) hp->h_length);
1991
      my_gethostbyname_r_free();
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    }
    sock_addr.sin_port = (ushort) htons((ushort) port);
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    if (my_connect(sock,(struct sockaddr *) &sock_addr, sizeof(sock_addr),
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		 mysql->options.connect_timeout) <0)
    {
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      DBUG_PRINT("error",("Got error %d on connect to '%s'",socket_errno,host));
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      net->last_errno= CR_CONN_HOST_ERROR;
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      sprintf(net->last_error ,ER(CR_CONN_HOST_ERROR), host, socket_errno);
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      goto error;
    }
  }
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  else
    if (!net->vio)
    {
      DBUG_PRINT("error",("Unknow protocol %d ",mysql->options.protocol));
      net->last_errno= CR_CONN_UNKNOW_PROTOCOL;
      sprintf(net->last_error ,ER(CR_CONN_UNKNOW_PROTOCOL));
      goto error;
    };
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  if (!net->vio || my_net_init(net, net->vio))
  {
    vio_delete(net->vio);
2015
    net->vio = 0;
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    net->last_errno=CR_OUT_OF_MEMORY;
    strmov(net->last_error,ER(net->last_errno));
    goto error;
  }
  vio_keepalive(net->vio,TRUE);

  /* Get version info */
  mysql->protocol_version= PROTOCOL_VERSION;	/* Assume this */
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  if (mysql->options.connect_timeout &&
      vio_poll_read(net->vio, mysql->options.connect_timeout))
  {
    net->last_errno= CR_SERVER_LOST;
    strmov(net->last_error,ER(net->last_errno));    
    goto error;
  }
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  if ((pkt_length=net_safe_read(mysql)) == packet_error)
    goto error;

  /* Check if version of protocoll matches current one */

  mysql->protocol_version= net->read_pos[0];
  DBUG_DUMP("packet",(char*) net->read_pos,10);
  DBUG_PRINT("info",("mysql protocol version %d, server=%d",
		     PROTOCOL_VERSION, mysql->protocol_version));
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  if (mysql->protocol_version != PROTOCOL_VERSION)
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  {
    net->last_errno= CR_VERSION_ERROR;
    sprintf(net->last_error, ER(CR_VERSION_ERROR), mysql->protocol_version,
	    PROTOCOL_VERSION);
    goto error;
  }
  end=strend((char*) net->read_pos+1);
  mysql->thread_id=uint4korr(end+1);
  end+=5;
  strmake(mysql->scramble_buff,end,8);
  end+=9;
  if (pkt_length >= (uint) (end+1 - (char*) net->read_pos))
    mysql->server_capabilities=uint2korr(end);
  if (pkt_length >= (uint) (end+18 - (char*) net->read_pos))
  {
    /* New protocol with 16 bytes to describe server characteristics */
    mysql->server_language=end[2];
    mysql->server_status=uint2korr(end+3);
  }

  /* Set character set */
  if ((charset_name=mysql->options.charset_name))
  {
    const char *save=charsets_dir;
    if (mysql->options.charset_dir)
      charsets_dir=mysql->options.charset_dir;
    mysql->charset=get_charset_by_name(mysql->options.charset_name,
                                       MYF(MY_WME));
    charsets_dir=save;
  }
  else if (mysql->server_language)
  {
    charset_name=charset_name_buff;
    sprintf(charset_name,"%d",mysql->server_language);	/* In case of errors */
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    if (!(mysql->charset =
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	  get_charset((uint8) mysql->server_language, MYF(0))))
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      mysql->charset = default_charset_info; /* shouldn't be fatal */

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  }
  else
    mysql->charset=default_charset_info;

  if (!mysql->charset)
  {
    net->last_errno=CR_CANT_READ_CHARSET;
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    if (mysql->options.charset_dir)
      sprintf(net->last_error,ER(net->last_errno),
              charset_name ? charset_name : "unknown",
              mysql->options.charset_dir);
    else
    {
      char cs_dir_name[FN_REFLEN];
      get_charsets_dir(cs_dir_name);
      sprintf(net->last_error,ER(net->last_errno),
              charset_name ? charset_name : "unknown",
              cs_dir_name);
    }
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    goto error;
  }

  /* Save connection information */
  if (!user) user="";
  if (!passwd) passwd="";
  if (!my_multi_malloc(MYF(0),
		       &mysql->host_info, (uint) strlen(host_info)+1,
		       &mysql->host,      (uint) strlen(host)+1,
		       &mysql->unix_socket,unix_socket ?
		       (uint) strlen(unix_socket)+1 : (uint) 1,
		       &mysql->server_version,
		       (uint) (end - (char*) net->read_pos),
		       NullS) ||
      !(mysql->user=my_strdup(user,MYF(0))) ||
      !(mysql->passwd=my_strdup(passwd,MYF(0))))
  {
    strmov(net->last_error, ER(net->last_errno=CR_OUT_OF_MEMORY));
    goto error;
  }
  strmov(mysql->host_info,host_info);
  strmov(mysql->host,host);
  if (unix_socket)
    strmov(mysql->unix_socket,unix_socket);
  else
    mysql->unix_socket=0;
  strmov(mysql->server_version,(char*) net->read_pos+1);
  mysql->port=port;
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  client_flag|=mysql->options.client_flag;
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  /* Send client information for access check */
  client_flag|=CLIENT_CAPABILITIES;

#ifdef HAVE_OPENSSL
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  if (mysql->options.ssl_key || mysql->options.ssl_cert ||
      mysql->options.ssl_ca || mysql->options.ssl_capath ||
      mysql->options.ssl_cipher)
    mysql->options.use_ssl= 1;
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  if (mysql->options.use_ssl)
    client_flag|=CLIENT_SSL;
#endif /* HAVE_OPENSSL */
  if (db)
    client_flag|=CLIENT_CONNECT_WITH_DB;
#ifdef HAVE_COMPRESS
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  if ((mysql->server_capabilities & CLIENT_COMPRESS) &&
      (mysql->options.compress || (client_flag & CLIENT_COMPRESS)))
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    client_flag|=CLIENT_COMPRESS;		/* We will use compression */
  else
#endif
    client_flag&= ~CLIENT_COMPRESS;

#ifdef HAVE_OPENSSL
  if ((mysql->server_capabilities & CLIENT_SSL) &&
      (mysql->options.use_ssl || (client_flag & CLIENT_SSL)))
  {
    DBUG_PRINT("info", ("Changing IO layer to SSL"));
    client_flag |= CLIENT_SSL;
  }
  else
  {
    if (client_flag & CLIENT_SSL)
    {
      DBUG_PRINT("info", ("Leaving IO layer intact because server doesn't support SSL"));
    }
    client_flag &= ~CLIENT_SSL;
  }
#endif /* HAVE_OPENSSL */

  int2store(buff,client_flag);
  mysql->client_flag=client_flag;

#ifdef HAVE_OPENSSL
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  /*
    Oops.. are we careful enough to not send ANY information without
    encryption?
  */
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  if (client_flag & CLIENT_SSL)
  {
2176
    struct st_mysql_options *options= &mysql->options;
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    if (my_net_write(net,buff,(uint) (2)) || net_flush(net))
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    {
      net->last_errno= CR_SERVER_LOST;
      strmov(net->last_error,ER(net->last_errno));    
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      goto error;
2182
    }
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    /* Do the SSL layering. */
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    if (!(mysql->connector_fd=
	  (gptr) new_VioSSLConnectorFd(options->ssl_key,
				       options->ssl_cert,
				       options->ssl_ca,
				       options->ssl_capath,
				       options->ssl_cipher)))
    {
      /* TODO: Change to SSL error */
      net->last_errno= CR_SERVER_LOST;
      strmov(net->last_error,ER(net->last_errno));    
      goto error;
    }
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    DBUG_PRINT("info", ("IO layer change in progress..."));
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    /* TODO:  Add proper error checking here, with return error message */
    sslconnect((struct st_VioSSLConnectorFd*)(mysql->connector_fd),
	       mysql->net.vio, (long) (mysql->options.connect_timeout));
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    DBUG_PRINT("info", ("IO layer change done!"));
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  }
#endif /* HAVE_OPENSSL */

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  DBUG_PRINT("info",("Server version = '%s'  capabilites: %ld  status: %d  client_flag: %d",
		     mysql->server_version,mysql->server_capabilities,
		     mysql->server_status, client_flag));

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  int3store(buff+2,max_allowed_packet);
  if (user && user[0])
2210
    strmake(buff+5,user,32);			/* Max user name */
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  else
    read_user_name((char*) buff+5);
#ifdef _CUSTOMCONFIG_
#include "_cust_libmysql.h";
#endif
  DBUG_PRINT("info",("user: %s",buff+5));
  end=scramble(strend(buff+5)+1, mysql->scramble_buff, passwd,
	       (my_bool) (mysql->protocol_version == 9));
  if (db && (mysql->server_capabilities & CLIENT_CONNECT_WITH_DB))
  {
2221
    end=strmake(end+1,db,NAME_LEN);
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    mysql->db=my_strdup(db,MYF(MY_WME));
    db=0;
  }
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  if (my_net_write(net,buff,(ulong) (end-buff)) || net_flush(net))
  {
    net->last_errno= CR_SERVER_LOST;
    strmov(net->last_error,ER(net->last_errno));    
    goto error;
  }
  if (net_safe_read(mysql) == packet_error)
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    goto error;
  if (client_flag & CLIENT_COMPRESS)		/* We will use compression */
    net->compress=1;
  if (db && mysql_select_db(mysql,db))
    goto error;
  if (mysql->options.init_command)
  {
    my_bool reconnect=mysql->reconnect;
    mysql->reconnect=0;
    if (mysql_query(mysql,mysql->options.init_command))
      goto error;
    mysql_free_result(mysql_use_result(mysql));
    mysql->reconnect=reconnect;
  }

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  if (mysql->options.rpl_probe && mysql_rpl_probe(mysql))
    goto error;
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  DBUG_PRINT("exit",("Mysql handler: %lx",mysql));
  reset_sigpipe(mysql);
  DBUG_RETURN(mysql);

error:
  reset_sigpipe(mysql);
  DBUG_PRINT("error",("message: %u (%s)",net->last_errno,net->last_error));
  {
    /* Free alloced memory */
    my_bool free_me=mysql->free_me;
    end_server(mysql);
    mysql->free_me=0;
    mysql_close(mysql);
    mysql->free_me=free_me;
  }
  DBUG_RETURN(0);
}

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/* needed when we move MYSQL structure to a different address */
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static void mysql_fix_pointers(MYSQL* mysql, MYSQL* old_mysql)
{
  MYSQL *tmp, *tmp_prev;
  if (mysql->master == old_mysql)
    mysql->master = mysql;
  if (mysql->last_used_con == old_mysql)
    mysql->last_used_con = mysql;
  if (mysql->last_used_slave == old_mysql)
    mysql->last_used_slave = mysql;
  for (tmp_prev = mysql, tmp = mysql->next_slave;
       tmp != old_mysql;tmp = tmp->next_slave)
  {
    tmp_prev = tmp;
  }
  tmp_prev->next_slave = mysql;
}
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2288

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static my_bool mysql_reconnect(MYSQL *mysql)
{
  MYSQL tmp_mysql;
  DBUG_ENTER("mysql_reconnect");

  if (!mysql->reconnect ||
      (mysql->server_status & SERVER_STATUS_IN_TRANS) || !mysql->host_info)
  {
2297
   /* Allow reconnect next time */
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    mysql->server_status&= ~SERVER_STATUS_IN_TRANS;
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    mysql->net.last_errno=CR_SERVER_GONE_ERROR;
    strmov(mysql->net.last_error,ER(mysql->net.last_errno));
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    DBUG_RETURN(1);
  }
  mysql_init(&tmp_mysql);
  tmp_mysql.options=mysql->options;
2305
  bzero((char*) &mysql->options,sizeof(mysql->options));
2306
  tmp_mysql.rpl_pivot = mysql->rpl_pivot;
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  if (!mysql_real_connect(&tmp_mysql,mysql->host,mysql->user,mysql->passwd,
			  mysql->db, mysql->port, mysql->unix_socket,
			  mysql->client_flag))
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  {
    mysql->net.last_errno= tmp_mysql.net.last_errno;
    strmov(mysql->net.last_error, tmp_mysql.net.last_error);
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    DBUG_RETURN(1);
2314
  }
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  tmp_mysql.free_me=mysql->free_me;
  mysql->free_me=0;
  mysql_close(mysql);
  *mysql=tmp_mysql;
2319
  mysql_fix_pointers(mysql, &tmp_mysql); /* adjust connection pointers */  
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  net_clear(&mysql->net);
  mysql->affected_rows= ~(my_ulonglong) 0;
  DBUG_RETURN(0);
}


/**************************************************************************
2327
  Change user and database 
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**************************************************************************/

my_bool	STDCALL mysql_change_user(MYSQL *mysql, const char *user, 
				  const char *passwd, const char *db)
{
  char buff[512],*pos=buff;
  DBUG_ENTER("mysql_change_user");

  if (!user)
    user="";
  if (!passwd)
    passwd="";

  pos=strmov(pos,user)+1;
  pos=scramble(pos, mysql->scramble_buff, passwd,
	       (my_bool) (mysql->protocol_version == 9));
  pos=strmov(pos+1,db ? db : "");
2345
  if (simple_command(mysql,COM_CHANGE_USER, buff,(ulong) (pos-buff),0))
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    DBUG_RETURN(1);

  my_free(mysql->user,MYF(MY_ALLOW_ZERO_PTR));
  my_free(mysql->passwd,MYF(MY_ALLOW_ZERO_PTR));
  my_free(mysql->db,MYF(MY_ALLOW_ZERO_PTR));

  mysql->user=  my_strdup(user,MYF(MY_WME));
  mysql->passwd=my_strdup(passwd,MYF(MY_WME));
  mysql->db=    db ? my_strdup(db,MYF(MY_WME)) : 0;
  DBUG_RETURN(0);
}


/**************************************************************************
2360
  Set current database
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**************************************************************************/

int STDCALL
mysql_select_db(MYSQL *mysql, const char *db)
{
  int error;
  DBUG_ENTER("mysql_select_db");
  DBUG_PRINT("enter",("db: '%s'",db));

2370
  if ((error=simple_command(mysql,COM_INIT_DB,db,(ulong) strlen(db),0)))
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    DBUG_RETURN(error);
  my_free(mysql->db,MYF(MY_ALLOW_ZERO_PTR));
  mysql->db=my_strdup(db,MYF(MY_WME));
  DBUG_RETURN(0);
}


/*************************************************************************
2379 2380
  Send a QUIT to the server and close the connection
  If handle is alloced by mysql connect free it.
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*************************************************************************/

void STDCALL
mysql_close(MYSQL *mysql)
{
  DBUG_ENTER("mysql_close");
  if (mysql)					/* Some simple safety */
  {
    if (mysql->net.vio != 0)
    {
      free_old_query(mysql);
      mysql->status=MYSQL_STATUS_READY; /* Force command */
2393
      mysql->reconnect=0;
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      simple_command(mysql,COM_QUIT,NullS,0,1);
2395
      end_server(mysql);			/* Sets mysql->net.vio= 0 */
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    }
    my_free((gptr) mysql->host_info,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->user,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->passwd,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->db,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->options.init_command,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->options.user,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->options.host,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->options.password,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->options.unix_socket,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->options.db,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->options.my_cnf_file,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->options.my_cnf_group,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->options.charset_dir,MYF(MY_ALLOW_ZERO_PTR));
    my_free(mysql->options.charset_name,MYF(MY_ALLOW_ZERO_PTR));
2411
#ifdef HAVE_OPENSSL
2412
    mysql_ssl_free(mysql);
2413
#endif /* HAVE_OPENSSL */
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#ifdef HAVE_SMEM
    if (mysql->options.shared_memory_base_name != def_shared_memory_base_name)
      my_free(mysql->options.shared_memory_base_name,MYF(MY_ALLOW_ZERO_PTR));
#endif /* HAVE_SMEM */
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    /* Clear pointers for better safety */
    mysql->host_info=mysql->user=mysql->passwd=mysql->db=0;
    bzero((char*) &mysql->options,sizeof(mysql->options));
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    /* free/close slave list */
    if (mysql->rpl_pivot)
    {
      MYSQL* tmp;
      for (tmp = mysql->next_slave; tmp != mysql; )
      {
	/* trick to avoid following freed pointer */
	MYSQL* tmp1 = tmp->next_slave;
	mysql_close(tmp);
	tmp = tmp1;
      }
2433
      mysql->rpl_pivot=0;
2434
    }
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    if (mysql != mysql->master)
2436
      mysql_close(mysql->master);
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    if (mysql->free_me)
      my_free((gptr) mysql,MYF(0));
  }
  DBUG_VOID_RETURN;
}


/**************************************************************************
2445 2446
  Do a query. If query returned rows, free old rows.
  Read data by mysql_store_result or by repeat call of mysql_fetch_row
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**************************************************************************/

int STDCALL
mysql_query(MYSQL *mysql, const char *query)
{
  return mysql_real_query(mysql,query, (uint) strlen(query));
}

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static MYSQL* spawn_init(MYSQL* parent, const char* host,
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			 unsigned int port, const char* user,
			 const char* passwd)
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{
  MYSQL* child;
  if (!(child = mysql_init(0)))
    return 0;
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2464 2465
  child->options.user = my_strdup((user) ? user :
				  (parent->user ? parent->user :
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				   parent->options.user), MYF(0));
  child->options.password = my_strdup((passwd) ? passwd :
				      (parent->passwd ?
				       parent->passwd :
2470 2471
				       parent->options.password), MYF(0));
  child->options.port = port;
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  child->options.host = my_strdup((host) ? host :
				  (parent->host ?
				   parent->host :
				   parent->options.host), MYF(0));
  if (parent->db)
2477
    child->options.db = my_strdup(parent->db, MYF(0));
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  else if (parent->options.db)
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    child->options.db = my_strdup(parent->options.db, MYF(0));

  child->options.rpl_parse = child->options.rpl_probe = child->rpl_pivot = 0;
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  return child;
}


int
STDCALL mysql_set_master(MYSQL* mysql, const char* host,
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			 unsigned int port, const char* user,
			 const char* passwd)
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{
  if (mysql->master != mysql && !mysql->master->rpl_pivot)
    mysql_close(mysql->master);
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  if (!(mysql->master = spawn_init(mysql, host, port, user, passwd)))
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    return 1;
  mysql->master->rpl_pivot = 0;
  mysql->master->options.rpl_parse = 0;
  mysql->master->options.rpl_probe = 0;
  return 0;
}

int
STDCALL mysql_add_slave(MYSQL* mysql, const char* host,
					   unsigned int port,
					   const char* user,
					   const char* passwd)
{
  MYSQL* slave;
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  if (!(slave = spawn_init(mysql, host, port, user, passwd)))
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    return 1;
  slave->next_slave = mysql->next_slave;
  mysql->next_slave = slave;
  return 0;
}


2517 2518 2519 2520
/*
  Send the query and return so we can do something else.
  Needs to be followed by mysql_read_query_result() when we want to
  finish processing it.
2521 2522 2523
*/  

int STDCALL
2524
mysql_send_query(MYSQL* mysql, const char* query, ulong length)
2525
{
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  DBUG_ENTER("mysql_send_query");
  DBUG_PRINT("enter",("rpl_parse: %d  rpl_pivot: %d",
		      mysql->options.rpl_parse, mysql->rpl_pivot));

2530 2531
  if (mysql->options.rpl_parse && mysql->rpl_pivot)
  {
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    switch (mysql_rpl_query_type(query, length)) {
2533
    case MYSQL_RPL_MASTER:
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      DBUG_RETURN(mysql_master_send_query(mysql, query, length));
2535
    case MYSQL_RPL_SLAVE:
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      DBUG_RETURN(mysql_slave_send_query(mysql, query, length));
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    case MYSQL_RPL_ADMIN:
      break;					/* fall through */
2539 2540 2541 2542
    }
  }

  mysql->last_used_con = mysql;
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  DBUG_RETURN(simple_command(mysql, COM_QUERY, query, length, 1));
2544
}
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2547
my_bool STDCALL mysql_read_query_result(MYSQL *mysql)
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{
  uchar *pos;
  ulong field_count;
  MYSQL_DATA *fields;
2552
  ulong length;
2553
  DBUG_ENTER("mysql_read_query_result");
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  /*
    Read from the connection which we actually used, which
    could differ from the original connection if we have slaves
  */
2559
  mysql = mysql->last_used_con;
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2561
  if ((length = net_safe_read(mysql)) == packet_error)
2562
    DBUG_RETURN(1);
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  free_old_query(mysql);			/* Free old result */
2564
get_info:
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  pos=(uchar*) mysql->net.read_pos;
  if ((field_count= net_field_length(&pos)) == 0)
  {
    mysql->affected_rows= net_field_length_ll(&pos);
    mysql->insert_id=	  net_field_length_ll(&pos);
2570
    if (mysql->server_capabilities & CLIENT_PROTOCOL_41)
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    {
      mysql->server_status=uint2korr(pos); pos+=2;
2573
      mysql->warning_count=uint2korr(pos); pos+=2;
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    }
2575
    else if (mysql->server_capabilities & CLIENT_TRANSACTIONS)
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    {
      mysql->server_status=uint2korr(pos); pos+=2;
2578
      mysql->warning_count= 0;
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    }
2580 2581
    DBUG_PRINT("info",("status: %ld  warning_count:  %ld",
		       mysql->server_status, mysql->warning_count));
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    if (pos < mysql->net.read_pos+length && net_field_length(&pos))
      mysql->info=(char*) pos;
    DBUG_RETURN(0);
  }
  if (field_count == NULL_LENGTH)		/* LOAD DATA LOCAL INFILE */
  {
    int error=send_file_to_server(mysql,(char*) pos);
    if ((length=net_safe_read(mysql)) == packet_error || error)
2590
      DBUG_RETURN(1);
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    goto get_info;				/* Get info packet */
  }
  if (!(mysql->server_status & SERVER_STATUS_AUTOCOMMIT))
    mysql->server_status|= SERVER_STATUS_IN_TRANS;

  mysql->extra_info= net_field_length_ll(&pos); /* Maybe number of rec */
2597

2598 2599
  if (!(fields=read_rows(mysql,(MYSQL_FIELD*)0, (protocol_41(mysql) ? 8 : 5))))
    DBUG_RETURN(1);
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  if (!(mysql->fields=unpack_fields(fields,&mysql->field_alloc,
				    (uint) field_count,0,
2602
				    mysql->server_capabilities)))
2603 2604
    DBUG_RETURN(1);
  mysql->status= MYSQL_STATUS_GET_RESULT;
2605
  mysql->field_count= (uint) field_count;
2606
  mysql->warning_count= 0;
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  DBUG_RETURN(0);
}

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2611
int STDCALL
2612
mysql_real_query(MYSQL *mysql, const char *query, ulong length)
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{
  DBUG_ENTER("mysql_real_query");
  DBUG_PRINT("enter",("handle: %lx",mysql));
  DBUG_PRINT("query",("Query = \"%s\"",query));
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  if (mysql_send_query(mysql,query,length))
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    DBUG_RETURN(1);
  DBUG_RETURN((int) mysql_read_query_result(mysql));
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}
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static my_bool
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send_file_to_server(MYSQL *mysql, const char *filename)
{
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  int fd, readcount;
  my_bool result= 1;
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  uint packet_length=MY_ALIGN(mysql->net.max_packet-16,IO_SIZE);
  char *buf, tmp_name[FN_REFLEN];
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  DBUG_ENTER("send_file_to_server");

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  if (!(buf=my_malloc(packet_length,MYF(0))))
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  {
    strmov(mysql->net.last_error, ER(mysql->net.last_errno=CR_OUT_OF_MEMORY));
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    DBUG_RETURN(1);
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  }
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  fn_format(tmp_name,filename,"","",4);		/* Convert to client format */
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  if ((fd = my_open(tmp_name,O_RDONLY, MYF(0))) < 0)
  {
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    my_net_write(&mysql->net,"",0);		/* Server needs one packet */
    net_flush(&mysql->net);
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    mysql->net.last_errno=EE_FILENOTFOUND;
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    my_snprintf(mysql->net.last_error,sizeof(mysql->net.last_error)-1,
		EE(mysql->net.last_errno),tmp_name, errno);
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    goto err;
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  }

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  while ((readcount = (int) my_read(fd,(byte*) buf,packet_length,MYF(0))) > 0)
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  {
    if (my_net_write(&mysql->net,buf,readcount))
    {
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      DBUG_PRINT("error",("Lost connection to MySQL server during LOAD DATA of local file"));
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      mysql->net.last_errno=CR_SERVER_LOST;
      strmov(mysql->net.last_error,ER(mysql->net.last_errno));
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      goto err;
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    }
  }
  /* Send empty packet to mark end of file */
  if (my_net_write(&mysql->net,"",0) || net_flush(&mysql->net))
  {
    mysql->net.last_errno=CR_SERVER_LOST;
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    sprintf(mysql->net.last_error,ER(mysql->net.last_errno),errno);
    goto err;
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  }
  if (readcount < 0)
  {
    mysql->net.last_errno=EE_READ; /* the errmsg for not entire file read */
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    my_snprintf(mysql->net.last_error,sizeof(mysql->net.last_error)-1,
		tmp_name,errno);
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    goto err;
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  }
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  result=0;					/* Ok */

err:
  if (fd >= 0)
    (void) my_close(fd,MYF(0));
  my_free(buf,MYF(0));
  DBUG_RETURN(result);
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}


/**************************************************************************
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  Alloc result struct for buffered results. All rows are read to buffer.
  mysql_data_seek may be used.
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**************************************************************************/

MYSQL_RES * STDCALL
mysql_store_result(MYSQL *mysql)
{
  MYSQL_RES *result;
  DBUG_ENTER("mysql_store_result");

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  /* read from the actually used connection */
  mysql = mysql->last_used_con;
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  if (!mysql->fields)
    DBUG_RETURN(0);
  if (mysql->status != MYSQL_STATUS_GET_RESULT)
  {
    strmov(mysql->net.last_error,
	   ER(mysql->net.last_errno=CR_COMMANDS_OUT_OF_SYNC));
    DBUG_RETURN(0);
  }
  mysql->status=MYSQL_STATUS_READY;		/* server is ready */
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  if (!(result=(MYSQL_RES*) my_malloc((uint) (sizeof(MYSQL_RES)+
					      sizeof(ulong) *
					      mysql->field_count),
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				      MYF(MY_WME | MY_ZEROFILL))))
  {
    mysql->net.last_errno=CR_OUT_OF_MEMORY;
    strmov(mysql->net.last_error, ER(mysql->net.last_errno));
    DBUG_RETURN(0);
  }
  result->eof=1;				/* Marker for buffered */
  result->lengths=(ulong*) (result+1);
  if (!(result->data=read_rows(mysql,mysql->fields,mysql->field_count)))
  {
    my_free((gptr) result,MYF(0));
    DBUG_RETURN(0);
  }
  mysql->affected_rows= result->row_count= result->data->rows;
  result->data_cursor=	result->data->data;
  result->fields=	mysql->fields;
  result->field_alloc=	mysql->field_alloc;
  result->field_count=	mysql->field_count;
  result->current_field=0;
  result->current_row=0;			/* Must do a fetch first */
  mysql->fields=0;				/* fields is now in result */
  DBUG_RETURN(result);				/* Data fetched */
}


/**************************************************************************
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  Alloc struct for use with unbuffered reads. Data is fetched by domand
  when calling to mysql_fetch_row.
  mysql_data_seek is a noop.

  No other queries may be specified with the same MYSQL handle.
  There shouldn't be much processing per row because mysql server shouldn't
  have to wait for the client (and will not wait more than 30 sec/packet).
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**************************************************************************/

MYSQL_RES * STDCALL
mysql_use_result(MYSQL *mysql)
{
  MYSQL_RES *result;
  DBUG_ENTER("mysql_use_result");

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  mysql = mysql->last_used_con;
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  if (!mysql->fields)
    DBUG_RETURN(0);
  if (mysql->status != MYSQL_STATUS_GET_RESULT)
  {
    strmov(mysql->net.last_error,
	   ER(mysql->net.last_errno=CR_COMMANDS_OUT_OF_SYNC));
    DBUG_RETURN(0);
  }
  if (!(result=(MYSQL_RES*) my_malloc(sizeof(*result)+
				      sizeof(ulong)*mysql->field_count,
				      MYF(MY_WME | MY_ZEROFILL))))
    DBUG_RETURN(0);
  result->lengths=(ulong*) (result+1);
  if (!(result->row=(MYSQL_ROW)
	my_malloc(sizeof(result->row[0])*(mysql->field_count+1), MYF(MY_WME))))
  {					/* Ptrs: to one row */
    my_free((gptr) result,MYF(0));
    DBUG_RETURN(0);
  }
  result->fields=	mysql->fields;
  result->field_alloc=	mysql->field_alloc;
  result->field_count=	mysql->field_count;
  result->current_field=0;
  result->handle=	mysql;
  result->current_row=	0;
  mysql->fields=0;			/* fields is now in result */
  mysql->status=MYSQL_STATUS_USE_RESULT;
  DBUG_RETURN(result);			/* Data is read to be fetched */
}



/**************************************************************************
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  Return next field of the query results
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**************************************************************************/

MYSQL_FIELD * STDCALL
mysql_fetch_field(MYSQL_RES *result)
{
  if (result->current_field >= result->field_count)
    return(NULL);
  return &result->fields[result->current_field++];
}


/**************************************************************************
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   Return next row of the query results
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**************************************************************************/

MYSQL_ROW STDCALL
mysql_fetch_row(MYSQL_RES *res)
{
  DBUG_ENTER("mysql_fetch_row");
  if (!res->data)
  {						/* Unbufferred fetch */
    if (!res->eof)
    {
      if (!(read_one_row(res->handle,res->field_count,res->row, res->lengths)))
      {
	res->row_count++;
	DBUG_RETURN(res->current_row=res->row);
      }
      else
      {
	DBUG_PRINT("info",("end of data"));
	res->eof=1;
	res->handle->status=MYSQL_STATUS_READY;
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	/* Don't clear handle in mysql_free_results */
	res->handle=0;
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      }
    }
    DBUG_RETURN((MYSQL_ROW) NULL);
  }
  {
    MYSQL_ROW tmp;
    if (!res->data_cursor)
    {
      DBUG_PRINT("info",("end of data"));
      DBUG_RETURN(res->current_row=(MYSQL_ROW) NULL);
    }
    tmp = res->data_cursor->data;
    res->data_cursor = res->data_cursor->next;
    DBUG_RETURN(res->current_row=tmp);
  }
}

/**************************************************************************
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  Get column lengths of the current row
  If one uses mysql_use_result, res->lengths contains the length information,
  else the lengths are calculated from the offset between pointers.
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**************************************************************************/

ulong * STDCALL
mysql_fetch_lengths(MYSQL_RES *res)
{
  ulong *lengths,*prev_length;
  byte *start;
  MYSQL_ROW column,end;

  if (!(column=res->current_row))
    return 0;					/* Something is wrong */
  if (res->data)
  {
    start=0;
    prev_length=0;				/* Keep gcc happy */
    lengths=res->lengths;
    for (end=column+res->field_count+1 ; column != end ; column++,lengths++)
    {
      if (!*column)
      {
	*lengths=0;				/* Null */
	continue;
      }
      if (start)				/* Found end of prev string */
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	*prev_length= (ulong) (*column-start-1);
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      start= *column;
      prev_length=lengths;
    }
  }
  return res->lengths;
}

/**************************************************************************
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  Move to a specific row and column
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**************************************************************************/

void STDCALL
mysql_data_seek(MYSQL_RES *result, my_ulonglong row)
{
  MYSQL_ROWS	*tmp=0;
  DBUG_PRINT("info",("mysql_data_seek(%ld)",(long) row));
  if (result->data)
    for (tmp=result->data->data; row-- && tmp ; tmp = tmp->next) ;
  result->current_row=0;
  result->data_cursor = tmp;
}

/*************************************************************************
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  put the row or field cursor one a position one got from mysql_row_tell()
  This doesn't restore any data. The next mysql_fetch_row or
  mysql_fetch_field will return the next row or field after the last used
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*************************************************************************/

MYSQL_ROW_OFFSET STDCALL
mysql_row_seek(MYSQL_RES *result, MYSQL_ROW_OFFSET row)
{
  MYSQL_ROW_OFFSET return_value=result->data_cursor;
  result->current_row= 0;
  result->data_cursor= row;
  return return_value;
}


MYSQL_FIELD_OFFSET STDCALL
mysql_field_seek(MYSQL_RES *result, MYSQL_FIELD_OFFSET field_offset)
{
  MYSQL_FIELD_OFFSET return_value=result->current_field;
  result->current_field=field_offset;
  return return_value;
}

/*****************************************************************************
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  List all databases
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*****************************************************************************/

MYSQL_RES * STDCALL
mysql_list_dbs(MYSQL *mysql, const char *wild)
{
  char buff[255];
  DBUG_ENTER("mysql_list_dbs");

  append_wild(strmov(buff,"show databases"),buff+sizeof(buff),wild);
  if (mysql_query(mysql,buff))
    DBUG_RETURN(0);
  DBUG_RETURN (mysql_store_result(mysql));
}


/*****************************************************************************
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  List all tables in a database
  If wild is given then only the tables matching wild is returned
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*****************************************************************************/

MYSQL_RES * STDCALL
mysql_list_tables(MYSQL *mysql, const char *wild)
{
  char buff[255];
  DBUG_ENTER("mysql_list_tables");

  append_wild(strmov(buff,"show tables"),buff+sizeof(buff),wild);
  if (mysql_query(mysql,buff))
    DBUG_RETURN(0);
  DBUG_RETURN (mysql_store_result(mysql));
}


/**************************************************************************
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  List all fields in a table
  If wild is given then only the fields matching wild is returned
  Instead of this use query:
  show fields in 'table' like "wild"
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**************************************************************************/

MYSQL_RES * STDCALL
mysql_list_fields(MYSQL *mysql, const char *table, const char *wild)
{
  MYSQL_RES *result;
  MYSQL_DATA *query;
  char	     buff[257],*end;
  DBUG_ENTER("mysql_list_fields");
  DBUG_PRINT("enter",("table: '%s'  wild: '%s'",table,wild ? wild : ""));

  LINT_INIT(query);

  end=strmake(strmake(buff, table,128)+1,wild ? wild : "",128);
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  if (simple_command(mysql,COM_FIELD_LIST,buff,(ulong) (end-buff),1) ||
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      !(query = read_rows(mysql,(MYSQL_FIELD*) 0,
			  (protocol_41(mysql) ? 9 : 6))))
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    DBUG_RETURN(NULL);

  free_old_query(mysql);
  if (!(result = (MYSQL_RES *) my_malloc(sizeof(MYSQL_RES),
					 MYF(MY_WME | MY_ZEROFILL))))
  {
    free_rows(query);
    DBUG_RETURN(NULL);
  }
  result->field_alloc=mysql->field_alloc;
  mysql->fields=0;
  result->field_count = (uint) query->rows;
  result->fields= unpack_fields(query,&result->field_alloc,
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				result->field_count, 1,
				mysql->server_capabilities);
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  result->eof=1;
  DBUG_RETURN(result);
}

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/* List all running processes (threads) in server */

MYSQL_RES * STDCALL
mysql_list_processes(MYSQL *mysql)
{
  MYSQL_DATA *fields;
  uint field_count;
  uchar *pos;
  DBUG_ENTER("mysql_list_processes");

  LINT_INIT(fields);
  if (simple_command(mysql,COM_PROCESS_INFO,0,0,0))
    DBUG_RETURN(0);
  free_old_query(mysql);
  pos=(uchar*) mysql->net.read_pos;
  field_count=(uint) net_field_length(&pos);
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  if (!(fields = read_rows(mysql,(MYSQL_FIELD*)0,protocol_41(mysql) ? 8: 5)))
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    DBUG_RETURN(NULL);
  if (!(mysql->fields=unpack_fields(fields,&mysql->field_alloc,field_count,0,
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				    mysql->server_capabilities)))
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    DBUG_RETURN(0);
  mysql->status=MYSQL_STATUS_GET_RESULT;
  mysql->field_count=field_count;
  DBUG_RETURN(mysql_store_result(mysql));
}


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#ifdef USE_OLD_FUNCTIONS
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int  STDCALL
mysql_create_db(MYSQL *mysql, const char *db)
{
  DBUG_ENTER("mysql_createdb");
  DBUG_PRINT("enter",("db: %s",db));
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  DBUG_RETURN(simple_command(mysql,COM_CREATE_DB,db, (ulong) strlen(db),0));
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}


int  STDCALL
mysql_drop_db(MYSQL *mysql, const char *db)
{
  DBUG_ENTER("mysql_drop_db");
  DBUG_PRINT("enter",("db: %s",db));
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  DBUG_RETURN(simple_command(mysql,COM_DROP_DB,db,(ulong) strlen(db),0));
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}
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#endif
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int STDCALL
mysql_shutdown(MYSQL *mysql)
{
  DBUG_ENTER("mysql_shutdown");
  DBUG_RETURN(simple_command(mysql,COM_SHUTDOWN,0,0,0));
}


int STDCALL
mysql_refresh(MYSQL *mysql,uint options)
{
  uchar bits[1];
  DBUG_ENTER("mysql_refresh");
  bits[0]= (uchar) options;
  DBUG_RETURN(simple_command(mysql,COM_REFRESH,(char*) bits,1,0));
}

int STDCALL
mysql_kill(MYSQL *mysql,ulong pid)
{
  char buff[12];
  DBUG_ENTER("mysql_kill");
  int4store(buff,pid);
  DBUG_RETURN(simple_command(mysql,COM_PROCESS_KILL,buff,4,0));
}


int STDCALL
mysql_dump_debug_info(MYSQL *mysql)
{
  DBUG_ENTER("mysql_dump_debug_info");
  DBUG_RETURN(simple_command(mysql,COM_DEBUG,0,0,0));
}

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const char * STDCALL
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mysql_stat(MYSQL *mysql)
{
  DBUG_ENTER("mysql_stat");
  if (simple_command(mysql,COM_STATISTICS,0,0,0))
    return mysql->net.last_error;
  mysql->net.read_pos[mysql->packet_length]=0;	/* End of stat string */
  if (!mysql->net.read_pos[0])
  {
    mysql->net.last_errno=CR_WRONG_HOST_INFO;
    strmov(mysql->net.last_error, ER(mysql->net.last_errno));
    return mysql->net.last_error;
  }
  DBUG_RETURN((char*) mysql->net.read_pos);
}


int STDCALL
mysql_ping(MYSQL *mysql)
{
  DBUG_ENTER("mysql_ping");
  DBUG_RETURN(simple_command(mysql,COM_PING,0,0,0));
}


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const char * STDCALL
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mysql_get_server_info(MYSQL *mysql)
{
  return((char*) mysql->server_version);
}


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const char * STDCALL
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mysql_get_host_info(MYSQL *mysql)
{
  return(mysql->host_info);
}


uint STDCALL
mysql_get_proto_info(MYSQL *mysql)
{
  return (mysql->protocol_version);
}

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const char * STDCALL
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mysql_get_client_info(void)
{
  return (char*) MYSQL_SERVER_VERSION;
}


int STDCALL
mysql_options(MYSQL *mysql,enum mysql_option option, const char *arg)
{
  DBUG_ENTER("mysql_option");
  DBUG_PRINT("enter",("option: %d",(int) option));
  switch (option) {
  case MYSQL_OPT_CONNECT_TIMEOUT:
    mysql->options.connect_timeout= *(uint*) arg;
    break;
  case MYSQL_OPT_COMPRESS:
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    mysql->options.compress= 1;			/* Remember for connect */
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    break;
  case MYSQL_OPT_NAMED_PIPE:
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    mysql->options.protocol=MYSQL_PROTOCOL_PIPE; /* Force named pipe */
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    break;
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  case MYSQL_OPT_LOCAL_INFILE:			/* Allow LOAD DATA LOCAL ?*/
    if (!arg || test(*(uint*) arg))
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      mysql->options.client_flag|= CLIENT_LOCAL_FILES;
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    else
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      mysql->options.client_flag&= ~CLIENT_LOCAL_FILES;
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    break;
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  case MYSQL_INIT_COMMAND:
    my_free(mysql->options.init_command,MYF(MY_ALLOW_ZERO_PTR));
    mysql->options.init_command=my_strdup(arg,MYF(MY_WME));
    break;
  case MYSQL_READ_DEFAULT_FILE:
    my_free(mysql->options.my_cnf_file,MYF(MY_ALLOW_ZERO_PTR));
    mysql->options.my_cnf_file=my_strdup(arg,MYF(MY_WME));
    break;
  case MYSQL_READ_DEFAULT_GROUP:
    my_free(mysql->options.my_cnf_group,MYF(MY_ALLOW_ZERO_PTR));
    mysql->options.my_cnf_group=my_strdup(arg,MYF(MY_WME));
    break;
  case MYSQL_SET_CHARSET_DIR:
    my_free(mysql->options.charset_dir,MYF(MY_ALLOW_ZERO_PTR));
    mysql->options.charset_dir=my_strdup(arg,MYF(MY_WME));
    break;
  case MYSQL_SET_CHARSET_NAME:
    my_free(mysql->options.charset_name,MYF(MY_ALLOW_ZERO_PTR));
    mysql->options.charset_name=my_strdup(arg,MYF(MY_WME));
    break;
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  case MYSQL_OPT_PROTOCOL:
    mysql->options.protocol= *(uint*) arg;
    break;
  case MYSQL_SHARED_MEMORY_BASE_NAME:
#ifdef HAVE_SMEM
    if (mysql->options.shared_memory_base_name != def_shared_memory_base_name)
      my_free(mysql->options.shared_memory_base_name,MYF(MY_ALLOW_ZERO_PTR));
    mysql->options.shared_memory_base_name=my_strdup(arg,MYF(MY_WME));
#endif
    break;
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  default:
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    DBUG_RETURN(1);
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  }
  DBUG_RETURN(0);
}

/****************************************************************************
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  Functions to get information from the MySQL structure
  These are functions to make shared libraries more usable.
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****************************************************************************/

/* MYSQL_RES */
my_ulonglong STDCALL mysql_num_rows(MYSQL_RES *res)
{
  return res->row_count;
}

unsigned int STDCALL mysql_num_fields(MYSQL_RES *res)
{
  return res->field_count;
}

my_bool STDCALL mysql_eof(MYSQL_RES *res)
{
  return res->eof;
}

MYSQL_FIELD * STDCALL mysql_fetch_field_direct(MYSQL_RES *res,uint fieldnr)
{
  return &(res)->fields[fieldnr];
}

MYSQL_FIELD * STDCALL mysql_fetch_fields(MYSQL_RES *res)
{
  return (res)->fields;
}

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MYSQL_ROW_OFFSET STDCALL mysql_row_tell(MYSQL_RES *res)
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{
  return res->data_cursor;
}

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MYSQL_FIELD_OFFSET STDCALL mysql_field_tell(MYSQL_RES *res)
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{
  return (res)->current_field;
}

/* MYSQL */

unsigned int STDCALL mysql_field_count(MYSQL *mysql)
{
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  return mysql->last_used_con->field_count;
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}

my_ulonglong STDCALL mysql_affected_rows(MYSQL *mysql)
{
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  return mysql->last_used_con->affected_rows;
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}

my_ulonglong STDCALL mysql_insert_id(MYSQL *mysql)
{
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  return mysql->last_used_con->insert_id;
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}

uint STDCALL mysql_errno(MYSQL *mysql)
{
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  return mysql->net.last_errno;
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}

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const char * STDCALL mysql_error(MYSQL *mysql)
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{
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  return mysql->net.last_error;
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}

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uint STDCALL mysql_warning_count(MYSQL *mysql)
{
  return mysql->warning_count;
}

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const char *STDCALL mysql_info(MYSQL *mysql)
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{
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  return mysql->info;
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}

ulong STDCALL mysql_thread_id(MYSQL *mysql)
{
  return (mysql)->thread_id;
}

const char * STDCALL mysql_character_set_name(MYSQL *mysql)
{
  return mysql->charset->name;
}


uint STDCALL mysql_thread_safe(void)
{
#ifdef THREAD
  return 1;
#else
  return 0;
#endif
}

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MYSQL_RES *STDCALL mysql_warnings(MYSQL *mysql)
{
  uint warning_count;
  DBUG_ENTER("mysql_warnings");
  /* Save warning count as mysql_real_query may change this */
  warning_count= mysql->warning_count;
  if (mysql_real_query(mysql, "SHOW WARNINGS", 13))
    DBUG_RETURN(0);
  mysql->warning_count= warning_count;
  DBUG_RETURN(mysql_store_result(mysql));
}

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/****************************************************************************
3292
  Some support functions
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****************************************************************************/

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/*
  Functions called my my_net_init() to set some application specific variables
*/

void my_net_local_init(NET *net)
{
  net->max_packet=   (uint) net_buffer_length;
  net->read_timeout= (uint) net_read_timeout;
  net->write_timeout=(uint) net_write_timeout;
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  net->retry_count=  1;
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  net->max_packet_size= max(net_buffer_length, max_allowed_packet);
}

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/*
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  Add escape characters to a string (blob?) to make it suitable for a insert
  to should at least have place for length*2+1 chars
  Returns the length of the to string
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*/

ulong STDCALL
mysql_escape_string(char *to,const char *from,ulong length)
{
  return mysql_sub_escape_string(default_charset_info,to,from,length);
}

ulong STDCALL
mysql_real_escape_string(MYSQL *mysql, char *to,const char *from,
			 ulong length)
{
  return mysql_sub_escape_string(mysql->charset,to,from,length);
}


static ulong
mysql_sub_escape_string(CHARSET_INFO *charset_info, char *to,
			const char *from, ulong length)
{
  const char *to_start=to;
  const char *end;
#ifdef USE_MB
  my_bool use_mb_flag=use_mb(charset_info);
#endif
  for (end=from+length; from != end ; from++)
  {
#ifdef USE_MB
    int l;
    if (use_mb_flag && (l = my_ismbchar(charset_info, from, end)))
    {
      while (l--)
	  *to++ = *from++;
      from--;
      continue;
    }
#endif
    switch (*from) {
    case 0:				/* Must be escaped for 'mysql' */
      *to++= '\\';
      *to++= '0';
      break;
    case '\n':				/* Must be escaped for logs */
      *to++= '\\';
      *to++= 'n';
      break;
    case '\r':
      *to++= '\\';
      *to++= 'r';
      break;
    case '\\':
      *to++= '\\';
      *to++= '\\';
      break;
    case '\'':
      *to++= '\\';
      *to++= '\'';
      break;
    case '"':				/* Better safe than sorry */
      *to++= '\\';
      *to++= '"';
      break;
    case '\032':			/* This gives problems on Win32 */
      *to++= '\\';
      *to++= 'Z';
      break;
    default:
      *to++= *from;
    }
  }
  *to=0;
  return (ulong) (to-to_start);
}


char * STDCALL
mysql_odbc_escape_string(MYSQL *mysql,
			 char *to, ulong to_length,
			 const char *from, ulong from_length,
			 void *param,
			 char * (*extend_buffer)
			 (void *, char *, ulong *))
{
  char *to_end=to+to_length-5;
  const char *end;
#ifdef USE_MB
  my_bool use_mb_flag=use_mb(mysql->charset);
#endif

  for (end=from+from_length; from != end ; from++)
  {
    if (to >= to_end)
    {
      to_length = (ulong) (end-from)+512;	/* We want this much more */
      if (!(to=(*extend_buffer)(param, to, &to_length)))
	return to;
      to_end=to+to_length-5;
    }
#ifdef USE_MB
    {
      int l;
      if (use_mb_flag && (l = my_ismbchar(mysql->charset, from, end)))
      {
	while (l--)
	  *to++ = *from++;
	from--;
	continue;
      }
    }
#endif
    switch (*from) {
    case 0:				/* Must be escaped for 'mysql' */
      *to++= '\\';
      *to++= '0';
      break;
    case '\n':				/* Must be escaped for logs */
      *to++= '\\';
      *to++= 'n';
      break;
    case '\r':
      *to++= '\\';
      *to++= 'r';
      break;
    case '\\':
      *to++= '\\';
      *to++= '\\';
      break;
    case '\'':
      *to++= '\\';
      *to++= '\'';
      break;
    case '"':				/* Better safe than sorry */
      *to++= '\\';
      *to++= '"';
      break;
    case '\032':			/* This gives problems on Win32 */
      *to++= '\\';
      *to++= 'Z';
      break;
    default:
      *to++= *from;
    }
  }
  return to;
}

void STDCALL
myodbc_remove_escape(MYSQL *mysql,char *name)
{
  char *to;
#ifdef USE_MB
  my_bool use_mb_flag=use_mb(mysql->charset);
  char *end;
  LINT_INIT(end);
  if (use_mb_flag)
    for (end=name; *end ; end++) ;
#endif

  for (to=name ; *name ; name++)
  {
#ifdef USE_MB
    int l;
    if (use_mb_flag && (l = my_ismbchar( mysql->charset, name , end ) ) )
    {
      while (l--)
	*to++ = *name++;
      name--;
      continue;
    }
#endif
    if (*name == '\\' && name[1])
      name++;
    *to++= *name;
  }
  *to=0;
}
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/********************************************************************

 Implementation of new client-server prototypes for 4.1 version
 starts from here ..

 mysql_* are real prototypes used by applications

*********************************************************************/

/********************************************************************
 Misc Utility functions
********************************************************************/

/*
3503
  Set the internal stmt error messages
3504 3505 3506 3507 3508
*/

static void set_stmt_error(MYSQL_STMT * stmt, int errcode)
{
  DBUG_ENTER("set_stmt_error");
3509
  DBUG_PRINT("enter", ("error: %d '%s'", errcode, ER(errcode)));
3510 3511
  DBUG_ASSERT(stmt != 0);

3512 3513
  stmt->last_errno= errcode;
  strmov(stmt->last_error, ER(errcode));
3514 3515 3516 3517

  DBUG_VOID_RETURN;
}

3518

3519
/*
3520
  Copy error message to statement handler
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*/

static void set_stmt_errmsg(MYSQL_STMT * stmt, char *err, int errcode)
{
  DBUG_ENTER("set_stmt_error_msg");
3526
  DBUG_PRINT("enter", ("error: %d '%s'", errcode, err));
3527 3528
  DBUG_ASSERT(stmt != 0);

3529
  stmt->last_errno= errcode;
3530
  if (err && err[0])
3531
    strmov(stmt->last_error, err);
3532 3533 3534 3535

  DBUG_VOID_RETURN;
}

3536

3537
/*
3538
  Set the internal error message to mysql handler
3539 3540 3541 3542 3543
*/

static void set_mysql_error(MYSQL * mysql, int errcode)
{
  DBUG_ENTER("set_mysql_error");
3544
  DBUG_PRINT("enter", ("error :%d '%s'", errcode, ER(errcode)));
3545 3546
  DBUG_ASSERT(mysql != 0);

3547
  mysql->net.last_errno= errcode;
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  strmov(mysql->net.last_error, ER(errcode));
}


/*
3553
  Reallocate the NET package to be at least of 'length' bytes
3554

3555 3556 3557 3558
  SYNPOSIS
   my_realloc_str()
   net			The NET structure to modify
   int length		Ensure that net->buff is at least this big
3559

3560 3561 3562
  RETURN VALUES
  0	ok
  1	Error
3563 3564 3565

*/

3566
static my_bool my_realloc_str(NET *net, ulong length)
3567
{
3568 3569 3570 3571
  ulong buf_length= (ulong) (net->write_pos - net->buff);
  my_bool res=0;
  DBUG_ENTER("my_realloc_str");
  if (buf_length + length > net->max_packet)
3572
  {
3573 3574
    res= net_realloc(net, buf_length + length);
    net->write_pos= net->buff+ buf_length;
3575
  }
3576
  DBUG_RETURN(res);
3577 3578 3579
}

/********************************************************************
3580
  Prepare related implementations
3581 3582 3583 3584
********************************************************************/

/*
  Read the prepare statement results ..
3585 3586 3587 3588 3589 3590 3591 3592

  NOTE
    This is only called for connection to servers that supports
    prepared statements (and thus the 4.1 protocol)

  RETURN VALUES
    0	ok
    1	error
3593 3594
*/

3595
static my_bool read_prepare_result(MYSQL *mysql, MYSQL_STMT *stmt)
3596 3597
{
  uchar *pos;
3598
  uint field_count;
3599 3600
  MYSQL_DATA *fields_data;
  ulong length;
3601
  DBUG_ENTER("read_prepare_result");
3602

3603 3604 3605
  mysql= mysql->last_used_con;
  if ((length= net_safe_read(mysql)) == packet_error)
    DBUG_RETURN(1);
3606

3607 3608 3609 3610
  pos=(uchar*) mysql->net.read_pos;
  stmt->stmt_id=    uint4korr(pos); pos+=4;
  field_count=      uint2korr(pos); pos+=2;
  stmt->param_count=uint2korr(pos); pos+=2;
3611

3612 3613 3614 3615
  if (field_count != 0)
  {
    if (!(mysql->server_status & SERVER_STATUS_AUTOCOMMIT))
      mysql->server_status|= SERVER_STATUS_IN_TRANS;
3616

3617 3618 3619 3620 3621 3622 3623 3624 3625 3626 3627 3628
    mysql->extra_info= net_field_length_ll(&pos);
    if (!(fields_data= read_rows(mysql, (MYSQL_FIELD*) 0, 8)))
      DBUG_RETURN(1);
    if (!(stmt->fields= unpack_fields(fields_data,&stmt->mem_root,
				      field_count,0,
				      mysql->server_capabilities)))
      DBUG_RETURN(1);
  }
  if (!(stmt->params= (MYSQL_BIND *) alloc_root(&stmt->mem_root,
						sizeof(MYSQL_BIND)*
						(stmt->param_count +
						 field_count))))
3629
  {
3630
    set_stmt_error(stmt, CR_OUT_OF_MEMORY);
3631 3632
    DBUG_RETURN(0);
  }
3633 3634 3635
  stmt->bind=		(stmt->params + stmt->param_count);
  stmt->field_count=	(uint) field_count;
  mysql->status=	MYSQL_STATUS_READY;
3636 3637 3638 3639 3640
  DBUG_RETURN(0);
}


/*
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  Prepare the query and return the new statement handle to
  caller.

  Also update the total parameter count along with resultset
  metadata information by reading from server
3646 3647
*/

3648 3649 3650

MYSQL_STMT *STDCALL
mysql_prepare(MYSQL  *mysql, const char *query, ulong length)
3651 3652 3653 3654 3655 3656 3657 3658 3659 3660 3661 3662 3663
{
  MYSQL_STMT  *stmt;
  DBUG_ENTER("mysql_real_prepare");
  DBUG_ASSERT(mysql != 0);

#ifdef EXTRA_CHECK_ARGUMENTS
  if (!query)
  {
    set_mysql_error(mysql, CR_NULL_POINTER);
    DBUG_RETURN(0);
  }
#endif

3664 3665 3666 3667 3668 3669
  if (!(stmt= (MYSQL_STMT *) my_malloc(sizeof(MYSQL_STMT),
				       MYF(MY_WME | MY_ZEROFILL))) ||
      !(stmt->query= my_strdup_with_length((byte *) query, length, MYF(0))))
  {
    my_free((gptr) stmt, MYF(MY_ALLOW_ZERO_PTR));
    set_mysql_error(mysql, CR_OUT_OF_MEMORY);
3670
    DBUG_RETURN(0);
3671 3672 3673 3674
  }
  if (simple_command(mysql, COM_PREPARE, query, length, 1))
  {
    mysql_stmt_close(stmt);
3675 3676
    DBUG_RETURN(0);
  }
3677
  stmt->state=		MY_ST_PREPARE;
3678

3679 3680
  init_alloc_root(&stmt->mem_root,8192,0);
  if (read_prepare_result(mysql, stmt))
3681
  {
3682
    mysql_stmt_close(stmt);
3683 3684
    DBUG_RETURN(0);
  }
3685 3686

  stmt->mysql=		mysql;
3687 3688 3689 3690 3691 3692 3693
  DBUG_PRINT("info", ("Parameter count: %ld", stmt->param_count));
  DBUG_RETURN(stmt);
}


/*
  Returns prepared meta information in the form of resultset
3694
  to client.
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*/

MYSQL_RES * STDCALL
mysql_prepare_result(MYSQL_STMT *stmt)
{
  MYSQL_RES *result;
  DBUG_ENTER("mysql_prepare_result");

  if (!stmt->fields)
    DBUG_RETURN(0);
3705
  result= &stmt->tmp_result;
3706
  bzero((char*) result, sizeof(MYSQL_RES));
3707 3708 3709 3710
  result->eof=1;	/* Marker for buffered */
  result->fields=	stmt->fields;
  result->field_count=	stmt->field_count;
  DBUG_RETURN(result);
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}

3713

3714 3715 3716 3717
/********************************************************************
 Prepare-execute, and param handling
*********************************************************************/

3718 3719
/*
  Store the buffer type
3720 3721
*/

3722
static void store_param_type(NET *net, uint type)
3723
{
3724 3725
  int2store(net->write_pos, type);
  net->write_pos+=2;
3726 3727
}

3728
/*
3729
  Store the length of parameter data
3730
  (Same function as in sql/net_pkg.cc)
3731
*/
3732 3733 3734

char *
net_store_length(char *pkg, ulong length)
3735 3736 3737 3738 3739 3740 3741
{
  uchar *packet=(uchar*) pkg;
  if (length < 251)
  {
    *packet=(uchar) length;
    return (char*) packet+1;
  }
3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757
  /* 251 is reserved for NULL */
  if (length < 65536L)
  {
    *packet++=252;
    int2store(packet,(uint) length);
    return (char*) packet+2;
  }
  if (length < 16777216L)
  {
    *packet++=253;
    int3store(packet,(ulong) length);
    return (char*) packet+3;
  }
  *packet++=254;
  int8store(packet, (ulonglong) length);
  return (char*) packet+9;
3758 3759 3760
}


3761 3762
/****************************************************************************
  Functions to store parameter data from a prepared statement.
3763

3764
  All functions has the following characteristics:
3765

3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779
  SYNOPSIS
    store_param_xxx()
    net			MySQL NET connection
    param		MySQL bind param

  RETURN VALUES
    0	ok
    1	Error	(Can't alloc net->buffer)
****************************************************************************/


static void store_param_tinyint(NET *net, MYSQL_BIND *param)
{
  *(net->write_pos++)= (uchar) *param->buffer;
3780 3781
}

3782 3783 3784 3785 3786 3787
static void store_param_short(NET *net, MYSQL_BIND *param)
{
  short value= *(short*) param->buffer;
  int2store(net->write_pos,value);
  net->write_pos+=2;
}
3788

3789
static void store_param_int32(NET *net, MYSQL_BIND *param)
3790
{
3791 3792 3793 3794
  int32 value= *(int32*) param->buffer;
  int4store(net->write_pos,value);
  net->write_pos+=4;
}
3795

3796 3797 3798 3799 3800 3801
static void store_param_int64(NET *net, MYSQL_BIND *param)
{
  longlong value= *(longlong*) param->buffer;
  int8store(net->write_pos,value);
  net->write_pos+= 8;
}
3802

3803 3804 3805 3806 3807
static void store_param_float(NET *net, MYSQL_BIND *param)
{
  float value= *(float*) param->buffer;
  float4store(net->write_pos, value);
  net->write_pos+= 4;
3808 3809
}

3810 3811 3812 3813 3814 3815
static void store_param_double(NET *net, MYSQL_BIND *param)
{
  double value= *(double*) param->buffer;
  float8store(net->write_pos, value);
  net->write_pos+= 8;
}
3816

3817
static void store_param_str(NET *net, MYSQL_BIND *param)
3818
{
3819 3820 3821 3822
  ulong length= *param->length;
  char *to= (char *) net_store_length((char *) net->write_pos, length);
  memcpy(to, param->buffer, length);
  net->write_pos+= length;
3823 3824
}

3825

3826
/*
3827 3828 3829 3830 3831 3832 3833 3834 3835 3836
  Mark if the parameter is NULL.

  SYNOPSIS
    store_param_null()
    net			MySQL NET connection
    param		MySQL bind param

  DESCRIPTION
    A data package starts with a string of bits where we set a bit
    if a parameter is NULL
3837 3838
*/

3839
static void store_param_null(NET *net, MYSQL_BIND *param)
3840
{
3841 3842 3843
  uint pos= param->param_number;
  (uchar) net->buff[pos/8]|=  (1 << pos & 7);
}
3844 3845 3846 3847


/*
  Set parameter data by reading from input buffers from the
3848
  client application
3849 3850
*/

3851
static my_bool store_param(MYSQL_STMT *stmt, MYSQL_BIND *param)
3852
{
3853 3854 3855
  MYSQL *mysql= stmt->mysql;
  NET	*net  = &mysql->net;
  DBUG_ENTER("store_param");
3856 3857 3858
  DBUG_PRINT("enter",("type : %d, buffer :%lx", param->buffer_type,
		      param->buffer));

3859 3860 3861 3862 3863 3864 3865
  /* Allocate for worst case (long string) */
  if ((my_realloc_str(net, 9 + *param->length)))
    return 1;
  if (!param->buffer)
    store_param_null(net, param);
  else
    (*param->store_param_func)(net, param);
3866 3867 3868
  DBUG_RETURN(1);
}

3869

3870 3871 3872 3873
/*
  Send the prepare query to server for execution
*/

3874
static my_bool execute(MYSQL_STMT * stmt, char *packet, ulong length)
3875
{
3876 3877 3878 3879
  MYSQL *mysql= stmt->mysql;
  NET	*net= &mysql->net;
  char buff[4];
  DBUG_ENTER("execute");
3880 3881
  DBUG_PRINT("enter",("packet: %s, length :%d",packet ? packet :" ", length));

3882 3883 3884 3885
  mysql->last_used_con= mysql;
  int4store(buff, stmt->stmt_id);		/* Send stmt id to server */
  if (advanced_command(mysql, COM_EXECUTE, buff, sizeof(buff), packet,
		       length, 1) ||
3886 3887 3888
      mysql_read_query_result(mysql))
  {
    set_stmt_errmsg(stmt, net->last_error, net->last_errno);
3889
    DBUG_RETURN(1);
3890
  }
3891
  stmt->state= MY_ST_EXECUTE;
3892 3893 3894 3895

  if (stmt->bind)
  {
    mysql_free_result(stmt->result);
3896
    stmt->result= mysql_store_result(mysql);
3897 3898 3899 3900
  }
  DBUG_RETURN(0);
}

3901 3902 3903

/*
  Execute the prepare query
3904 3905
*/

3906
int STDCALL mysql_execute(MYSQL_STMT *stmt)
3907
{
3908 3909
  ulong length;
  uint null_count;
3910 3911 3912 3913 3914
  DBUG_ENTER("mysql_execute");

  if (stmt->state == MY_ST_UNKNOWN)
  {
    set_stmt_error(stmt, CR_NO_PREPARE_STMT);
3915
    DBUG_RETURN(1);
3916
  }
3917
  stmt->mysql->fields= stmt->fields;
3918 3919
  if (stmt->param_count)
  {
3920 3921
    NET        *net= &stmt->mysql->net;
    MYSQL_BIND *param, *param_end;
3922
    char       *param_data;
3923
    my_bool result;
3924 3925 3926 3927 3928

    if (!stmt->params)
    {
      /* Parameters exists, but no bound buffers */
      set_stmt_error(stmt, CR_NOT_ALL_PARAMS_BOUND);
3929
      DBUG_RETURN(1);
3930
    }
3931 3932 3933 3934 3935 3936 3937 3938 3939 3940
    net_clear(net);				/* Sets net->write_pos */
    /* Reserve place for null-marker bytes */
    null_count= (stmt->param_count+7) /8;
    bzero((char*) net->write_pos, null_count);
    net->write_pos+= null_count;
    param_end= stmt->params + stmt->param_count;

    /* In case if buffers (type) altered, indicate to server */
    *(net->write_pos)++= (uchar) stmt->types_supplied;
    if (!stmt->types_supplied)
3941
    {
3942 3943 3944 3945 3946 3947 3948 3949 3950 3951
      stmt->types_supplied=1;
      /*
	Store types of parameters in first in first package
	that is sent to the server.
      */
      for (param= stmt->params;	param < param_end ; param++)
	store_param_type(net, (uint) param->buffer_type);
    }

    for (param= stmt->params; param < param_end; param++)
3952
    {
3953 3954 3955 3956 3957 3958 3959 3960
      /* Check for long data which has not been propery given/terminated */
      if (param->is_long_data)
      {
	if (!param->long_ended)
	  DBUG_RETURN(MYSQL_NEED_DATA);
      }
      else if (store_param(stmt, param))
	DBUG_RETURN(1);
3961
    }
3962 3963 3964 3965 3966 3967
    length= (ulong) (net->write_pos - net->buff);
    /* TODO: Look into avoding the following memdup */
    if (!(param_data= my_memdup((byte *) net->buff, length, MYF(0))))
    {
      set_stmt_error(stmt, CR_OUT_OF_MEMORY);
      DBUG_RETURN(1);
3968
    }
3969 3970
    net->write_pos= net->buff;			/* Reset for net_write() */
    result= execute(stmt, param_data, length);
3971
    my_free(param_data, MYF(MY_WME));
3972 3973 3974
    DBUG_RETURN(result);
  }
  DBUG_RETURN((int) execute(stmt,0,0));
3975 3976
}

3977

3978 3979 3980 3981 3982 3983 3984 3985 3986 3987 3988 3989
/*
  Return total parameters count in the statement
*/

ulong STDCALL mysql_param_count(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_param_count");
  DBUG_RETURN(stmt->param_count);
}


/*
3990
  Setup the parameter data buffers from application
3991 3992
*/

3993
my_bool STDCALL mysql_bind_param(MYSQL_STMT *stmt, MYSQL_BIND * bind)
3994
{
3995 3996
  uint count=0;
  MYSQL_BIND *param, *end;
3997 3998 3999 4000 4001 4002
  DBUG_ENTER("mysql_bind_param");

#ifdef CHECK_EXTRA_ARGUMENTS
  if (stmt->state == MY_ST_UNKNOWN)
  {
    set_stmt_error(stmt, CR_NO_PREPARE_STMT);
4003
    DBUG_RETURN(1);
4004 4005 4006 4007
  }
  if (!stmt->param_count)
  {
    set_stmt_error(stmt, CR_NO_PARAMETERS_EXISTS);
4008
    DBUG_RETURN(1);
4009 4010 4011
  }
#endif

4012 4013 4014 4015 4016 4017 4018
  /* Allocated on prepare */
  memcpy((char*) stmt->params, (char*) bind,
	 sizeof(MYSQL_BIND) * stmt->param_count);

  for (param= stmt->params, end= param+stmt->param_count;
       param < end ;
       param++)
4019
  {
4020 4021 4022 4023
    param->param_number= count++;
    if (param->is_long_data &&
	(param->buffer_type < MYSQL_TYPE_TINY_BLOB ||
	 param->buffer_type > MYSQL_TYPE_STRING))
4024
    {
4025 4026 4027
      /*
	Long data handling should be used only for string/binary
	types only
4028
      */
4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077
      sprintf(stmt->last_error, ER(stmt->last_errno= CR_INVALID_BUFFER_USE),
	      param->param_number);
      DBUG_RETURN(1);
    }
    /*
      If param->length is not given, change it to point to bind_length.
      This way we can always use *param->length to get the length of data
    */
    if (!param->length)
      param->length= &param->bind_length;

    /* Setup data copy functions for the different supported types */
    switch (param->buffer_type) {
    case MYSQL_TYPE_TINY:
      param->bind_length= 1;
      param->store_param_func= store_param_tinyint;
      break;
    case MYSQL_TYPE_SHORT:
      param->bind_length= 2;
      param->store_param_func= store_param_short;
      break;
    case MYSQL_TYPE_LONG:
      param->bind_length= 4;
      param->store_param_func= store_param_int32;
      break;
    case MYSQL_TYPE_LONGLONG:
      param->bind_length= 8;
      param->store_param_func= store_param_int64;
      break;
    case MYSQL_TYPE_FLOAT:
      param->bind_length= 4;
      param->store_param_func= store_param_float;
      break;
    case MYSQL_TYPE_DOUBLE:
      param->bind_length= 4;
      param->store_param_func= store_param_double;
      break;
    case MYSQL_TYPE_TINY_BLOB:
    case MYSQL_TYPE_MEDIUM_BLOB:
    case MYSQL_TYPE_LONG_BLOB:
    case MYSQL_TYPE_VAR_STRING:
    case MYSQL_TYPE_STRING:
      param->bind_length= param->buffer_length;
      param->store_param_func= store_param_str;
      break;
    default:
      sprintf(stmt->last_error, ER(stmt->last_errno= CR_UNSUPPORTED_PARAM_TYPE),
	      param->buffer_type, param->param_number);
      DBUG_RETURN(1);
4078 4079
    }
  }
4080 4081
  /* We have to send/resendtype information to MySQL */
  stmt->types_supplied= 0;
4082 4083 4084
  DBUG_RETURN(0);
}

4085

4086 4087 4088 4089 4090
/********************************************************************
 Long data implementation
*********************************************************************/

/*
4091 4092 4093 4094 4095 4096 4097 4098 4099 4100 4101 4102 4103
  Send long data in pieces to the server

  SYNOPSIS
    mysql_send_long_data()
    stmt			Statement handler
    param_number		Parameter number (0 - N-1)
    data			Data to send to server
    length			Length of data to send (may be 0)
    last_data			If != 0 then this is the last data to the
				server.
  RETURN VALUES
  0	ok
  1	error
4104 4105 4106
*/


4107 4108 4109 4110
my_bool STDCALL
mysql_send_long_data(MYSQL_STMT *stmt, uint param_number,
		     const char *data, ulong length,
		     my_bool last_data)
4111 4112 4113
{
  MYSQL_BIND *param;
  DBUG_ENTER("mysql_send_long_data");
4114
  DBUG_ASSERT(stmt != 0);
4115
  DBUG_PRINT("enter",("param no : %d, data : %lx, length : %ld",
4116
		      param_number, data, length));
4117

4118
  if (param_number >= stmt->param_count)
4119 4120 4121 4122
  {
    set_stmt_error(stmt, CR_INVALID_PARAMETER_NO);
    DBUG_RETURN(1);
  }
4123 4124
  param= stmt->params+param_number;
  if (length)
4125
  {
4126 4127 4128 4129 4130 4131 4132
    MYSQL *mysql= stmt->mysql;
    char   *packet, extra_data[MYSQL_LONG_DATA_HEADER];

    packet= extra_data;
    int4store(packet, stmt->stmt_id);	   packet+=4;
    int2store(packet, param_number);	   packet+=2;
    int2store(packet, param->buffer_type); packet+=2;
4133

4134 4135 4136 4137 4138 4139
    /*
      Note that we don't get any ok packet from the server in this case
      This is intentional to save bandwidth.
    */
    if (advanced_command(mysql, COM_LONG_DATA, extra_data,
			 MYSQL_LONG_DATA_HEADER, data, length, 1))
4140
    {
4141 4142
      set_stmt_errmsg(stmt,(char *) mysql->net.last_error,
		      mysql->net.last_errno);
4143 4144 4145
      DBUG_RETURN(1);
    }
  }
4146
  param->long_ended= last_data;
4147 4148 4149
  DBUG_RETURN(0);
}

4150

4151
/********************************************************************
4152
  Fetch-bind related implementations
4153 4154 4155
*********************************************************************/

/*
4156
  Setup the bind buffers for resultset processing
4157 4158
*/

4159
my_bool STDCALL mysql_bind_result(MYSQL_STMT *stmt, MYSQL_BIND *bind)
4160
{
4161 4162
  MYSQL_BIND *param, *end;
  ulong       bind_count;
4163 4164 4165
  DBUG_ENTER("mysql_bind_result");
  DBUG_ASSERT(stmt != 0);

4166
#ifdef EXTRA_CHECK_ARGUMENTS
4167 4168 4169
  if (!bind)
  {
    set_stmt_error(stmt, CR_NULL_POINTER);
4170
    DBUG_RETURN(1);
4171
  }
4172 4173 4174 4175
#endif
  bind_count= stmt->result->field_count;
  memcpy((char*) stmt->bind, (char*) bind,
	 sizeof(MYSQL_BIND)*bind_count);
4176

4177
  for (param= stmt->bind, end= param+bind_count; param < end ; param++)
4178
  {
4179
    /* TODO:  Set up convert functions like in mysql_bind_param */
4180 4181 4182 4183
  }
  DBUG_RETURN(0);
}

4184

4185
/*
4186
  Fetch row data to bind buffers
4187 4188
*/

4189 4190
static my_bool
my_fetch_row(MYSQL_STMT *stmt, MYSQL_RES *result, const byte *row)
4191
{
4192 4193
  MYSQL_BIND  *bind, *end;
  uchar *null_ptr= (uchar*) row, bit;
4194

4195 4196 4197 4198 4199 4200 4201
  result->row_count++;
  row+= (result->field_count+7)/8;
  /* Copy complete row to application buffers */
  bit=1;
  for (bind= stmt->bind, end= (MYSQL_BIND *) bind + result->field_count;
       bind < end;
       bind++)
4202
  {
4203 4204
    if (*null_ptr & bit)
      bind->is_null= 1;
4205 4206
    else
    {
4207 4208
      bind->is_null= 0;
      row= (byte*) (*bind->fetch_result)(bind, (char*) row);
4209
    }
4210
    if (! (bit<<=1) & 255)
4211
    {
4212 4213
      bit=1;					/* To next byte */
      null_ptr++;
4214 4215
    }
  }
4216
  return 0;
4217 4218 4219
}


4220 4221
static int
read_binary_data(MYSQL *mysql)
4222
{
4223 4224 4225 4226 4227
  ulong pkt_len;
  if ((pkt_len= net_safe_read(mysql)) == packet_error)
    return -1;
  if (mysql->net.read_pos[0])
    return 1;				/* End of data */
4228 4229 4230
  return 0;
}

4231

4232
/*
4233
  Fetch and return row data to bound buffers, if any
4234 4235
*/

4236
int STDCALL mysql_fetch(MYSQL_STMT *stmt)
4237 4238 4239 4240
{
  MYSQL_RES *result;
  DBUG_ENTER("mysql_fetch");

4241
  result= stmt->result;
4242 4243 4244 4245 4246
  if (!result)
    DBUG_RETURN(MYSQL_NO_DATA);

  if (!result->data)
  {
4247
    MYSQL *mysql= stmt->mysql;
4248 4249
    if (!result->eof)
    {
4250 4251 4252 4253 4254 4255 4256 4257 4258 4259 4260
      int res;
      if (!(res= read_binary_data(result->handle)))
	DBUG_RETURN((int) my_fetch_row(stmt, result,
				       (byte*) mysql->net.read_pos+1));
      DBUG_PRINT("info", ("end of data"));
      result->eof= 1;
      result->handle->status= MYSQL_STATUS_READY;

      /* Don't clear handle in mysql_free_results */
      result->handle= 0;
      if (res < 0)				/* Network error */
4261
      {
4262 4263 4264
	set_stmt_errmsg(stmt,(char *)mysql->net.last_error,
			mysql->net.last_errno);
	DBUG_RETURN(MYSQL_STATUS_ERROR);
4265 4266 4267 4268 4269
      }
    }
    DBUG_RETURN(MYSQL_NO_DATA); /* no more data */
  }
  {
4270 4271 4272 4273 4274 4275
    /*
      For prepared statements, the row data is a string of binary bytes,
      not a set of string pointers as for normal statements
      It's however convenient to use the data pointer also for prepared
      statements.
    */
4276 4277 4278 4279
    MYSQL_ROW values;
    if (!result->data_cursor)
    {
      DBUG_PRINT("info", ("end of data"));
4280
      result->current_row= (MYSQL_ROW) NULL;
4281 4282
      DBUG_RETURN(MYSQL_NO_DATA);
    }
4283 4284
    values= result->data_cursor->data;
    result->data_cursor= result->data_cursor->next;
4285

4286
    DBUG_RETURN((int) my_fetch_row(stmt,result, (byte*) values));
4287 4288 4289 4290 4291 4292 4293 4294
  }
  DBUG_RETURN(0);
}


/********************************************************************
 Misc function implementations
*********************************************************************/
4295

4296
/*
4297
  Close the statement handle by freeing all resources
4298 4299
*/

4300
my_bool STDCALL mysql_stmt_close(MYSQL_STMT *stmt)
4301
{
4302
  my_bool error=0;
4303 4304
  DBUG_ENTER("mysql_stmt_close");

4305 4306 4307 4308 4309 4310 4311 4312 4313
  if (stmt->state)
  {
    char buff[4];
    int4store(buff, stmt->stmt_id);
    error= simple_command(stmt->mysql, COM_CLOSE_STMT, buff, 4, 0);
  }

  free_root(&stmt->mem_root, MYF(0));
  my_free((gptr) stmt->query, MYF(MY_WME | MY_ALLOW_ZERO_PTR));
4314
  my_free((gptr) stmt->bind, MY_ALLOW_ZERO_PTR);
4315
  my_free((gptr) stmt->params, MY_ALLOW_ZERO_PTR);
4316
  my_free((gptr) stmt, MYF(MY_WME));
4317
  DBUG_RETURN(error);
4318 4319 4320 4321 4322 4323 4324 4325 4326
}

/*
  Return statement error code
*/

uint STDCALL mysql_stmt_errno(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_errno");
4327
  DBUG_RETURN(stmt->last_errno);
4328 4329 4330 4331 4332 4333 4334 4335 4336
}

/*
  Return statement error message
*/

const char *STDCALL mysql_stmt_error(MYSQL_STMT * stmt)
{
  DBUG_ENTER("mysql_stmt_error");
4337
  DBUG_RETURN(stmt->last_error);
4338 4339 4340 4341 4342 4343
}

/*
  Commit the current transaction
*/

4344
my_bool STDCALL mysql_commit(MYSQL * mysql)
4345 4346
{
  DBUG_ENTER("mysql_commit");
4347
  DBUG_RETURN((my_bool) mysql_real_query(mysql, "commit", 6));
4348 4349 4350
}

/*
4351
  Rollback the current transaction
4352 4353
*/

4354
my_bool STDCALL mysql_rollback(MYSQL * mysql)
4355 4356
{
  DBUG_ENTER("mysql_rollback");
4357
  DBUG_RETURN((my_bool) mysql_real_query(mysql, "rollback", 8));
4358 4359 4360 4361 4362 4363 4364
}


/*
  Set autocommit to either true or false
*/

4365
my_bool STDCALL mysql_autocommit(MYSQL * mysql, my_bool auto_mode)
4366 4367 4368 4369 4370
{
  DBUG_ENTER("mysql_autocommit");
  DBUG_PRINT("enter", ("mode : %d", auto_mode));

  if (auto_mode) /* set to true */
4371 4372
    DBUG_RETURN((my_bool) mysql_real_query(mysql, "set autocommit=1", 16));
  DBUG_RETURN((my_bool) mysql_real_query(mysql, "set autocommit=0", 16));
4373
}