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mariadb/libmysql/libmysql.c
unknown 5a28c2caca Fixes and code cleanups after merge with 4.0.3 
Warning handling and initial prepared statement handling (last not complete yet)
Changed a lot of functions that returned 0/1 to my_bool type.
GRANT handling now uses read/write locks instead of mutex
Change basic net functions to use THD instead of NET
(needed for 4.1 protocol)
Use my_sprintf instead of sprintf() + strlen()
Added alloc_query() to be able to chare query initialization code with
prepared statements.
Cleanup handling of SHOW COUNT(*) WARNINGS and SELECT LAST_INSERT_ID()

Note that the following test fails (will be fixed ASAP):
sub_select, union, rpl_rotate_logs and rpl_mystery22


BitKeeper/deleted/.del-README~3449730baf983117:
  Delete: mysql-test/t/README
BitKeeper/deleted/.del-sql_error.cc~2f1caca8d2485dbe:
  Delete: libmysqld/sql_error.cc
BitKeeper/deleted/.del-sql_prepare.cc~f703729793935ed6:
  Delete: libmysqld/sql_prepare.cc
Docs/manual.texi:
  Updated variable list
client/mysql.cc:
  Show warning count to user.
client/mysqltest.c:
  Add warnings to test results
configure.in:
  New shared library version number
include/errmsg.h:
  Indentation cleanup
include/mysql.h:
  Removed MYSQL_ERROR
  Indentaion cleanups
include/mysql_com.h:
  Changed functions to returns true/false to my_bool.
include/mysqld_error.h:
  New error messages
isam/pack_isam.c:
  Indentation change
libmysql/Makefile.am:
  Fix of wrong merge
libmysql/Makefile.shared:
  Indentation cleanup
libmysql/errmsg.c:
  Removed not used errors
libmysql/libmysql.c:
  Change functions to return 1 on error (not -1)
  Change type of functions that returns 0/1 to my_bool
  Lot of code optimizations.
  Lot of changes for prepared statements. This now handles sending of binary data to server.
  Receving of binary data is not yet done (will have to wait until server code for this is ready)
  mysql_warning_count and mysql_warnings() implemented.
libmysql/libmysql.def:
  Added mysql_warnings and mysql_warning_count
libmysql/manager.c:
  Fixed wrong testing of result from my_connect()
libmysqld/lib_sql.cc:
  Removed global variable THR_NET
  Change basic net functions to use THD instead of NET
  GRANT handling now uses read/write locks instead of mutex
libmysqld/libmysqld.c:
  Changed functions to be my_bool
myisam/ft_boolean_search.c:
  Trivial code cleanup
myisam/ft_stopwords.c:
  Trivial code cleanup
myisam/mi_check.c:
  Update to 4.1 structures
myisam/myisampack.c:
  Trivial code cleanup
myisam/rt_key.c:
  Code cleanup
myisam/rt_test.c:
  Code cleanup
  Removed compiler warnings
myisam/sp_key.c:
  Indentation changes
myisam/sp_test.c:
  Removed compiler warnings
mysql-test/README:
  Updated to reflect the new --external flag.
mysql-test/mysql-test-run.sh:
  --local (start new server) is now default.
  Use --external to test against external server.
mysql-test/r/rollback.result:
  Updated for 4.1 warnings
mysql-test/r/rpl_log.result:
  Update for 4.1
mysql-test/t/rollback.test:
  Updated for 4.1 warnings
mysql-test/t/rpl_log_pos.test:
  Portability fix
mysys/hash.c:
  Indentation change
mysys/my_error.c:
  Indentation change
mysys/tree.c:
  Updated file description
sql/field.cc:
  Fixed bugs introduced by merge
  Use my_sprintf instead of sprintf() + strlen()
sql/field.h:
  Add CHARSET_INFO to field structure
sql/gstream.h:
  Indentation changes.
  Added GPL copyright header
sql/ha_innodb.cc:
  Updated parameters for net functions.
sql/item.cc:
  Updates of Item_param
  Indentation changes
sql/item.h:
  Removed size_of() function from item.
sql/item_func.cc:
  Update function usage for 4.1
  Added get_system_var()
sql/item_func.h:
  Indentation change
sql/item_strfunc.cc:
  Removed not needed inclusion of gstream.h
  Update to use system variables (from 4.0)
sql/item_sum.h:
  Removed size_of() functions from item.
sql/item_timefunc.cc:
  Change sprintf() + strlen() -> my_sprintf()
  Added length parameter to ->append()
sql/item_timefunc.h:
  Removed size_of() functions from item.
sql/item_uniq.h:
  Removed size_of() functions from item.
sql/lex.h:
  Removed SQL_ERROR_COUNT variable
sql/log.cc:
  Change sprintf() + strlen() -> my_sprintf()
sql/log_event.cc:
  Change sprintf() + strlen() -> my_sprintf()
sql/mini_client.cc:
  Added check that one always specifies a length to mc_mysql_query()
sql/mysql_priv.h:
  New prototypes
  Change of NET -> THD parameter for net functions.
sql/mysqld.cc:
  New startup options:  'max_prepared_statements', 'max_error_count'
  Updated usage of net functions.
sql/net_pkg.cc:
  Change basic net functions to use THD instead of NET
  (needed to be able to handle 4.0 and 4.1 protocols)
  Lots of function comments
sql/net_serv.cc:
  Change int return values -> my_bool
  Updated net_write_command() to take an extra header block to be added to the packet.
  (This made the prepared statement code much nicer and more efficient)
sql/repl_failsafe.cc:
  Update net functions to use THD instead of NET
sql/set_var.cc:
  Added @@error_count and @@warning_count variables.
  Updated to 4.1 function usage
sql/set_var.h:
  Added @@error_count and @@warning_count variables.
sql/share/czech/errmsg.txt:
  Removed Warning: from warning error messages.
sql/share/english/errmsg.txt:
  Removed Warning: from warning error messages.
sql/share/greek/errmsg.txt:
  Removed Warning: from warning error messages.
sql/share/hungarian/errmsg.txt:
  Removed Warning: from warning error messages.
sql/share/japanese/errmsg.txt:
  Removed Warning: from warning error messages.
sql/share/korean/errmsg.txt:
  Removed Warning: from warning error messages.
sql/share/norwegian-ny/errmsg.txt:
  Removed Warning: from warning error messages.
sql/share/norwegian/errmsg.txt:
  Removed Warning: from warning error messages.
sql/share/polish/errmsg.txt:
  Removed Warning: from warning error messages.
sql/share/romanian/errmsg.txt:
  Removed Warning: from warning error messages.
sql/share/slovak/errmsg.txt:
  Removed Warning: from warning error messages.
sql/share/swedish/errmsg.txt:
  Removed Warning: from warning error messages.
sql/slave.cc:
  Change basic net functions to use THD instead of NET
  skip_load_data_file recoded to fit new client/server protocol
sql/spatial.h:
  Added copyright header
  Indentation cleanups
sql/sql_acl.cc:
  Change basic net functions to use THD instead of NET
  GRANT handling now uses read/write locks instead of mutex
sql/sql_analyse.cc:
  Change basic net functions to use THD instead of NET
  sprintf() + strlen() -> my_sprintf()
sql/sql_base.cc:
  More DBUG statements
sql/sql_class.cc:
  Change basic net functions to use THD instead of NET
  warning and prepared statement handling
sql/sql_class.h:
  Change basic net functions to use THD instead of NET
  warning and prepared statement handling
sql/sql_db.cc:
  Code cleanup & optimization.
sql/sql_delete.cc:
  Change basic net functions to use THD instead of NET
sql/sql_derived.cc:
  Change basic net functions to use THD instead of NET
sql/sql_do.cc:
  Change basic net functions to use THD instead of NET
sql/sql_error.cc:
  Big rewrite of error handling.
sql/sql_handler.cc:
  Change basic net functions to use THD instead of NET
sql/sql_insert.cc:
  Change basic net functions to use THD instead of NET
sql/sql_lex.cc:
  Change basic net functions to use THD instead of NET
sql/sql_lex.h:
  Added param_count to st_select_lex_node
sql/sql_list.h:
  Removed not needed error list.
sql/sql_load.cc:
  Change basic net functions to use THD instead of NET
sql/sql_parse.cc:
  Change basic net functions to use THD instead of NET
  Added alloc_query() to be able to chare query initialization code with
  prepared statements.
  Update of warning handling.
  Added create_select_for_variable() (for SHOW COUNT(*) WARNINGS)
sql/sql_prepare.cc:
  Initial prepared statement handling
sql/sql_rename.cc:
  Change basic net functions to use THD instead of NET
sql/sql_repl.cc:
  Change basic net functions to use THD instead of NET
sql/sql_select.cc:
  Small code cleanups
  Added missing initialization of error that caused some queries that returned an empty result set to fail
sql/sql_select.h:
  Ensure that JOIN.error is properly initialized
sql/sql_show.cc:
  Change basic net functions to use THD instead of NET
  A lot of optimization
sql/sql_table.cc:
  Change basic net functions to use THD instead of NET
  Indentaion cleanup
sql/sql_udf.cc:
  Change basic net functions to use THD instead of NET
sql/sql_union.cc:
  Change basic net functions to use THD instead of NET
sql/sql_update.cc:
  Change basic net functions to use THD instead of NET
sql/sql_yacc.yy:
  Change basic net functions to use THD instead of NET
  Cleanup handling of SHOW COUNT(*) WARNINGS and SELECT LAST_INSERT_ID()
sql/structs.h:
  Moved structures to files where they was used
sql/table.cc:
  Don't accept empty database names
sql/uniques.cc:
  Indentation cleanup
sql/unireg.cc:
  Change basic net functions to use THD instead of NET
sql/unireg.h:
  Added defaults for warnings and prepared statements
strings/ctype-simple.c:
  optimization
tests/client_test.c:
  Fixed wrong paramaters to printf()
2002-10-02 13:33:08 +03:00

4128 lines
108 KiB
C
Raw Blame History

/* 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,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include <my_global.h>
#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>
#include <assert.h> /* for DBUG_ASSERT() */
#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
#include <select.h>
#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;
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;
#define CLIENT_CAPABILITIES (CLIENT_LONG_PASSWORD | CLIENT_LONG_FLAG \
| CLIENT_LOCAL_FILES | CLIENT_TRANSACTIONS \
| CLIENT_PROTOCOL_41)
#ifdef __WIN__
#define CONNECT_TIMEOUT 20
#else
#define CONNECT_TIMEOUT 0
#endif
#if defined(MSDOS) || defined(__WIN__)
// socket_errno is defined in my_global.h for all platforms
#define perror(A)
#else
#include <errno.h>
#define SOCKET_ERROR -1
#endif /* __WIN__ */
/*
If allowed through some configuration, then this needs to
be changed
*/
#define MAX_LONG_DATA_LENGTH 8192
#define protocol_41(A) ((A)->server_capabilities & CLIENT_PROTOCOL_41)
#define unsigned_field(A) ((A)->flags & UNSIGNED_FLAG)
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);
static my_bool send_file_to_server(MYSQL *mysql,const char *filename);
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);
static my_bool org_my_init_done=0;
int STDCALL mysql_server_init(int argc __attribute__((unused)),
char **argv __attribute__((unused)),
char **groups __attribute__((unused)))
{
return 0;
}
void STDCALL mysql_server_end()
{
/* If library called my_init(), free memory allocated by it */
if (!org_my_init_done)
my_end(0);
}
my_bool STDCALL mysql_thread_init()
{
#ifdef THREAD
return my_thread_init();
#else
return 0;
#endif
}
void STDCALL mysql_thread_end()
{
#ifdef THREAD
my_thread_end();
#endif
}
/*
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
static MYSQL* spawn_init(MYSQL* parent, const char* host,
unsigned int port,
const char* user,
const char* passwd);
/****************************************************************************
A modified version of connect(). my_connect() allows you to specify
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>
*****************************************************************************/
my_bool my_connect(my_socket s, const struct sockaddr *name,
uint namelen, uint timeout)
{
#if defined(__WIN__) || defined(OS2)
return connect(s, (struct sockaddr*) name, namelen) != 0;
#else
int flags, res, s_err;
SOCKOPT_OPTLEN_TYPE s_err_size = sizeof(uint);
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.
*/
if (timeout == 0)
return connect(s, (struct sockaddr*) name, namelen) != 0;
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 */
return(1);
}
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 (;;)
{
tv.tv_sec = (long) timeout;
tv.tv_usec = 0;
#if defined(HPUX) && defined(THREAD)
if ((res = select(s+1, NULL, (int*) &sfds, NULL, &tv)) >= 0)
break;
#else
if ((res = select(s+1, NULL, &sfds, NULL, &tv)) >= 0)
break;
#endif
now_time=time(NULL);
timeout-= (uint) (now_time - start_time);
if (errno != EINTR || (int) timeout <= 0)
return 1;
}
/* 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)
return(1);
if (s_err)
{ /* getsockopt could succeed */
errno = s_err;
return(1); /* but return an error... */
}
return(0); /* It's all good! */
#endif
}
/*
Create a named pipe connection
*/
#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
/*****************************************************************************
read a packet from server. Give error message if socket was down
or packet is an error message
*****************************************************************************/
ulong
net_safe_read(MYSQL *mysql)
{
NET *net= &mysql->net;
ulong len=0;
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));
return (packet_error);
}
if (net->read_pos[0] == 255)
{
if (len > 3)
{
char *pos=(char*) net->read_pos+1;
net->last_errno=uint2korr(pos);
pos+=2;
len-=2;
(void) strmake(net->last_error,(char*) pos,
min((uint) len,(uint) sizeof(net->last_error)-1));
}
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)
{
free_root(&cur->alloc,MYF(0));
my_free((gptr) cur,MYF(0));
}
}
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)
{
NET *net= &mysql->net;
my_bool result= 1;
init_sigpipe_variables
/* Don't give sigpipe errors if the client doesn't want them */
set_sigpipe(mysql);
if (mysql->net.vio == 0)
{ /* Do reconnect if possible */
if (mysql_reconnect(mysql))
return 1;
}
if (mysql->status != MYSQL_STATUS_READY)
{
strmov(net->last_error,ER(mysql->net.last_errno=CR_COMMANDS_OUT_OF_SYNC));
return 1;
}
mysql->net.last_error[0]=0;
mysql->net.last_errno=0;
mysql->info=0;
mysql->affected_rows= ~(my_ulonglong) 0;
net_clear(&mysql->net); /* Clear receive buffer */
if (net_write_command(net,(uchar) command, header, header_length,
arg, arg_length))
{
DBUG_PRINT("error",("Can't send command to server. Error: %d",
socket_errno));
end_server(mysql);
if (mysql_reconnect(mysql))
goto end;
if (net_write_command(net,(uchar) command, header, header_length,
arg, arg_length))
{
net->last_errno=CR_SERVER_GONE_ERROR;
strmov(net->last_error,ER(net->last_errno));
goto end;
}
}
result=0;
if (!skip_check)
result= ((mysql->packet_length=net_safe_read(mysql)) == packet_error ?
1 : 0);
end:
reset_sigpipe(mysql);
return result;
}
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);
}
static void free_old_query(MYSQL *mysql)
{
DBUG_ENTER("free_old_query");
if (mysql->fields)
free_root(&mysql->field_alloc,MYF(0));
init_alloc_root(&mysql->field_alloc,8192,0); /* Assume rowlength < 8192 */
mysql->fields=0;
mysql->field_count=0; /* For API */
DBUG_VOID_RETURN;
}
#if defined(HAVE_GETPWUID) && defined(NO_GETPWUID_DECL)
struct passwd *getpwuid(uid_t);
char* getlogin(void);
#endif
#if !defined(MSDOS) && ! defined(VMS) && !defined(__WIN__) && !defined(OS2)
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)
{
char *str=getenv("USER"); /* ODBC will send user variable */
strmake(name,str ? str : "ODBC", USERNAME_LENGTH);
}
#endif
#ifdef __WIN__
static my_bool is_NT(void)
{
char *os=getenv("OS");
return (os && !strcmp(os, "Windows_NT")) ? 1 : 0;
}
#endif
/*
Expand wildcard to a sql string
*/
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;
}
}
/**************************************************************************
Init debugging if MYSQL_DEBUG environment variable is found
**************************************************************************/
void STDCALL
mysql_debug(const char *debug __attribute__((unused)))
{
#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
}
/**************************************************************************
Close the server connection if we get a SIGPIPE
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
}
/**************************************************************************
Shut down connection
**************************************************************************/
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)
{
DBUG_PRINT("warning",("Not all rows in set where read; Ignoring rows"));
for (;;)
{
ulong pkt_len;
if ((pkt_len=net_safe_read(result->handle)) == packet_error)
break;
if (pkt_len <= 8 && result->handle->net.read_pos[0] == 254)
break; /* End of data */
}
result->handle->status=MYSQL_STATUS_READY;
}
free_rows(result->data);
if (result->fields)
free_root(&result->field_alloc,MYF(0));
if (result->row)
my_free((gptr) result->row,MYF(0));
my_free((gptr) result,MYF(0));
}
DBUG_VOID_RETURN;
}
/****************************************************************************
Get options from my.cnf
****************************************************************************/
static const char *default_options[]=
{
"port","socket","compress","password","pipe", "timeout", "user",
"init-command", "host", "database", "debug", "return-found-rows",
"ssl-key" ,"ssl-cert" ,"ssl-ca" ,"ssl-capath",
"character-sets-dir", "default-character-set", "interactive-timeout",
"connect-timeout", "local-infile", "disable-local-infile",
"replication-probe", "enable-reads-from-master", "repl-parse-query",
"ssl-cipher",
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 '=' */
}
/* Change all '_' in variable name to '-' */
for (end= *option ; *(end= strcend(end,'_')) ; )
*end= '-';
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;
case 5: /* pipe */
options->named_pipe=1; /* Force named pipe */
break;
case 20: /* connect_timeout */
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;
case 19: /* Interactive-timeout */
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;
break;
case 22:
options->client_flag&= CLIENT_LOCAL_FILES;
break;
case 23: /* replication probe */
options->rpl_probe= 1;
break;
case 24: /* enable-reads-from-master */
options->no_master_reads= 0;
break;
case 25: /* repl-parse-query */
options->rpl_parse= 1;
break;
default:
DBUG_PRINT("warning",("unknown option: %s",option[0]));
}
}
}
}
free_defaults(argv);
DBUG_VOID_RETURN;
}
/***************************************************************************
Change field rows to field structs
***************************************************************************/
static MYSQL_FIELD *
unpack_fields(MYSQL_DATA *data,MEM_ROOT *alloc,uint fields,
my_bool default_value, uint server_capabilities)
{
MYSQL_ROWS *row;
MYSQL_FIELD *field,*result;
DBUG_ENTER("unpack_fields");
field=result=(MYSQL_FIELD*) alloc_root(alloc,
(uint) sizeof(MYSQL_FIELD)*fields);
if (!result)
{
free_rows(data); /* Free old data */
DBUG_RETURN(0);
}
if (server_capabilities & CLIENT_PROTOCOL_41)
{
/* server is 4.1, and returns the new field result format */
for (row=data->data; row ; row = row->next,field++)
{
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;
}
}
#ifndef DELETE_SUPPORT_OF_4_0_PROTOCOL
else
{
/* old protocol, for backward compatibility */
for (row=data->data; row ; row = row->next,field++)
{
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;
}
}
#endif /* DELETE_SUPPORT_OF_4_0_PROTOCOL */
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)
{
uint field;
ulong pkt_len;
ulong len;
uchar *cp;
char *to;
MYSQL_DATA *result;
MYSQL_ROWS **prev_ptr,*cur;
NET *net = &mysql->net;
DBUG_ENTER("read_rows");
if ((pkt_len= net_safe_read(mysql)) == packet_error)
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);
}
init_alloc_root(&result->alloc,8192,0); /* Assume rowlength < 8192 */
result->alloc.min_malloc=sizeof(MYSQL_ROWS);
prev_ptr= &result->data;
result->rows=0;
result->fields=fields;
/*
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)
{
result->rows++;
if (!(cur= (MYSQL_ROWS*) alloc_root(&result->alloc,
sizeof(MYSQL_ROWS))) ||
!(cur->data= ((MYSQL_ROW)
alloc_root(&result->alloc,
(fields+1)*sizeof(char *)+pkt_len))))
{
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 */
if (pkt_len > 1) /* MySQL 4.1 protocol */
{
mysql->warning_count= uint2korr(cp+1);
DBUG_PRINT("info",("warning_count: %ld", mysql->warning_count));
}
DBUG_PRINT("exit",("Got %d rows",result->rows));
DBUG_RETURN(result);
}
/*
Read one row. Uses packet buffer as storage for fields.
When next packet is read, the previous field values are destroyed
*/
static int
read_one_row(MYSQL *mysql,uint fields,MYSQL_ROW row, ulong *lengths)
{
uint field;
ulong pkt_len,len;
uchar *pos,*prev_pos;
if ((pkt_len=net_safe_read(mysql)) == packet_error)
return -1;
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);
return 1; /* End of data */
}
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;
}
/* perform query on master */
my_bool STDCALL mysql_master_query(MYSQL *mysql, const char *q,
unsigned long length)
{
if (mysql_master_send_query(mysql, q, length))
return 1;
return mysql_read_query_result(mysql);
}
my_bool STDCALL mysql_master_send_query(MYSQL *mysql, const char *q,
unsigned long length)
{
MYSQL*master = mysql->master;
if (!length)
length = strlen(q);
if (!master->net.vio && !mysql_real_connect(master,0,0,0,0,0,0,0))
return 1;
mysql->last_used_con = master;
return simple_command(master, COM_QUERY, q, length, 1);
}
/* perform query on slave */
my_bool STDCALL mysql_slave_query(MYSQL *mysql, const char *q,
unsigned long length)
{
if (mysql_slave_send_query(mysql, q, length))
return 1;
return mysql_read_query_result(mysql);
}
my_bool STDCALL mysql_slave_send_query(MYSQL *mysql, const char *q,
unsigned long length)
{
MYSQL* last_used_slave, *slave_to_use = 0;
if ((last_used_slave = mysql->last_used_slave))
slave_to_use = last_used_slave->next_slave;
else
slave_to_use = mysql->next_slave;
/* next_slave is always safe to use - we have a circular list of slaves
if there are no slaves, mysql->next_slave == mysql
*/
mysql->last_used_con = mysql->last_used_slave = slave_to_use;
if (!length)
length = strlen(q);
if (!slave_to_use->net.vio && !mysql_real_connect(slave_to_use, 0,0,0,
0,0,0,0))
return 1;
return simple_command(slave_to_use, COM_QUERY, q, length, 1);
}
/* 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 */
my_bool STDCALL mysql_reads_from_master_enabled(MYSQL* mysql)
{
return !(mysql->options.no_master_reads);
}
/*
We may get an error while doing replication internals.
In this case, we add a special explanation to the original
error
*/
static void expand_error(MYSQL* mysql, int error)
{
char tmp[MYSQL_ERRMSG_SIZE];
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);
mysql->net.last_errno = error;
}
/*
This function assumes we have just called SHOW SLAVE STATUS and have
read the given result and row
*/
static my_bool get_master(MYSQL* mysql, MYSQL_RES* res, MYSQL_ROW row)
{
MYSQL* master;
DBUG_ENTER("get_master");
if (mysql_num_fields(res) < 3)
DBUG_RETURN(1); /* safety */
/* use the same username and password as the original connection */
if (!(master = spawn_init(mysql, row[0], atoi(row[2]), 0, 0)))
DBUG_RETURN(1);
mysql->master = master;
DBUG_RETURN(0);
}
/*
Assuming we already know that mysql points to a master connection,
retrieve all the slaves
*/
static my_bool get_slaves_from_master(MYSQL* mysql)
{
MYSQL_RES* res = 0;
MYSQL_ROW row;
my_bool error = 1;
int has_auth_info;
int port_ind;
DBUG_ENTER("get_slaves_from_master");
if (!mysql->net.vio && !mysql_real_connect(mysql,0,0,0,0,0,0,0))
{
expand_error(mysql, CR_PROBE_MASTER_CONNECT);
DBUG_RETURN(1);
}
if (mysql_query(mysql, "SHOW SLAVE HOSTS") ||
!(res = mysql_store_result(mysql)))
{
expand_error(mysql, CR_PROBE_SLAVE_HOSTS);
DBUG_RETURN(1);
}
switch (mysql_num_fields(res)) {
case 5:
has_auth_info = 0;
port_ind=2;
break;
case 7:
has_auth_info = 1;
port_ind=4;
break;
default:
goto err;
}
while ((row = mysql_fetch_row(res)))
{
MYSQL* slave;
const char* tmp_user, *tmp_pass;
if (has_auth_info)
{
tmp_user = row[2];
tmp_pass = row[3];
}
else
{
tmp_user = mysql->user;
tmp_pass = mysql->passwd;
}
if (!(slave = spawn_init(mysql, row[1], atoi(row[port_ind]),
tmp_user, tmp_pass)))
goto err;
/* Now add slave into the circular linked list */
slave->next_slave = mysql->next_slave;
mysql->next_slave = slave;
}
error = 0;
err:
if (res)
mysql_free_result(res);
DBUG_RETURN(error);
}
my_bool STDCALL mysql_rpl_probe(MYSQL* mysql)
{
MYSQL_RES *res= 0;
MYSQL_ROW row;
my_bool error= 1;
DBUG_ENTER("mysql_rpl_probe");
/*
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
*/
if (mysql_query(mysql, "SHOW SLAVE STATUS") ||
!(res = mysql_store_result(mysql)))
{
expand_error(mysql, CR_PROBE_SLAVE_STATUS);
DBUG_RETURN(1);
}
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]))
{
/* this is a slave, ask it for the master */
if (get_master(mysql, res, row) || get_slaves_from_master(mysql))
goto err;
}
else
{
mysql->master = mysql;
if (get_slaves_from_master(mysql))
goto err;
}
error = 0;
err:
if (res)
mysql_free_result(res);
DBUG_RETURN(error);
}
/*
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
*/
enum mysql_rpl_type
STDCALL mysql_rpl_query_type(const char* q, int len)
{
const char* q_end;
q_end = (len) ? q + len : strend(q);
for (; q < q_end; ++q)
{
char c;
if (my_isalpha(system_charset_info, (c= *q)))
{
switch (my_tolower(system_charset_info,c)) {
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 */
return my_tolower(system_charset_info,q[1]) == 'h' ? MYSQL_RPL_ADMIN :
MYSQL_RPL_MASTER;
case 's': /* select or show */
return my_tolower(system_charset_info,q[1]) == 'h' ? MYSQL_RPL_ADMIN :
MYSQL_RPL_SLAVE;
case 'f': /* flush */
case 'r': /* repair */
case 'g': /* grant */
return MYSQL_RPL_ADMIN;
default:
return MYSQL_RPL_SLAVE;
}
}
}
return MYSQL_RPL_MASTER; /* By default, send to master */
}
/****************************************************************************
Init MySQL structure or allocate one
****************************************************************************/
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;
mysql->net.vio = 0;
}
else
bzero((char*) (mysql),sizeof(*(mysql)));
mysql->options.connect_timeout=CONNECT_TIMEOUT;
mysql->last_used_con = mysql->next_slave = mysql->master = mysql;
mysql->last_used_slave = 0;
/*
By default, we are a replication pivot. The caller must reset it
after we return if this is not the case.
*/
mysql->rpl_pivot = 1;
#if defined(SIGPIPE) && defined(THREAD) && !defined(__WIN__)
if (!((mysql)->client_flag & CLIENT_IGNORE_SIGPIPE))
(void) signal(SIGPIPE,pipe_sig_handler);
#endif
/*
Only enable LOAD DATA INFILE by default if configured with
--enable-local-infile
*/
#ifdef ENABLED_LOCAL_INFILE
mysql->options.client_flag|= CLIENT_LOCAL_FILES;
#endif
return mysql;
}
static void mysql_once_init()
{
if (!mysql_client_init)
{
mysql_client_init=1;
org_my_init_done=my_init_done;
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);
#if defined(SIGPIPE) && !defined(THREAD) && !defined(__WIN__)
(void) signal(SIGPIPE,SIG_IGN);
#endif
}
#ifdef THREAD
else
my_thread_init(); /* Init if new thread */
#endif
}
/**************************************************************************
Fill in SSL part of MYSQL structure and set 'use_ssl' flag.
NB! Errors are not reported until you do mysql_real_connect.
**************************************************************************/
#define strdup_if_not_null(A) (A) == 0 ? 0 : my_strdup((A),MYF(MY_WME))
my_bool STDCALL
mysql_ssl_set(MYSQL *mysql __attribute__((unused)) ,
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)))
{
#ifdef HAVE_OPENSSL
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);
#endif
return 0;
}
/**************************************************************************
Free strings in the SSL structure and clear 'use_ssl' flag.
NB! Errors are not reported until you do mysql_real_connect.
**************************************************************************/
static void
mysql_ssl_free(MYSQL *mysql __attribute__((unused)))
{
#ifdef HAVE_OPENSSL
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));
my_free(mysql->options.ssl_cipher, MYF(MY_ALLOW_ZERO_PTR));
my_free(mysql->connector_fd,MYF(MY_ALLOW_ZERO_PTR));
mysql->options.ssl_key = 0;
mysql->options.ssl_cert = 0;
mysql->options.ssl_ca = 0;
mysql->options.ssl_capath = 0;
mysql->options.ssl_cipher= 0;
mysql->options.use_ssl = FALSE;
mysql->connector_fd = 0;
#endif /* HAVE_OPENSSL */
}
/**************************************************************************
Connect to sql server
If host == 0 then use localhost
**************************************************************************/
#ifdef USE_OLD_FUNCTIONS
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);
}
}
#endif
/*
Note that the mysql argument must be initialized with mysql_init()
before calling mysql_real_connect !
*/
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)
{
char buff[NAME_LEN+USERNAME_LENGTH+100],charset_name_buff[16];
char *end,*host_info,*charset_name;
my_socket sock;
uint32 ip_addr;
struct sockaddr_in sock_addr;
ulong pkt_length;
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
*/
#if defined(HAVE_SYS_UN_H)
if ((!host || !strcmp(host,LOCAL_HOST)) && (unix_socket || mysql_unix_port))
{
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;
sprintf(net->last_error,ER(net->last_errno),socket_errno);
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);
if (my_connect(sock,(struct sockaddr *) &UNIXaddr, sizeof(UNIXaddr),
mysql->options.connect_timeout))
{
DBUG_PRINT("error",("Got error %d on connect to local server",socket_errno));
net->last_errno=CR_CONNECTION_ERROR;
sprintf(net->last_error,ER(net->last_errno),unix_socket,socket_errno);
goto error;
}
}
else
#elif defined(__WIN__)
{
if ((unix_socket ||
!host && is_NT() ||
host && !strcmp(host,LOCAL_HOST_NAMEDPIPE) ||
mysql->options.named_pipe || !have_tcpip))
{
sock=0;
if ((hPipe=create_named_pipe(net, mysql->options.connect_timeout,
(char**) &host, (char**) &unix_socket)) ==
INVALID_HANDLE_VALUE)
{
DBUG_PRINT("error",
("host: '%s' socket: '%s' named_pipe: %d have_tcpip: %d",
host ? host : "<null>",
unix_socket ? unix_socket : "<null>",
(int) mysql->options.named_pipe,
(int) have_tcpip));
if (mysql->options.named_pipe ||
(host && !strcmp(host,LOCAL_HOST_NAMEDPIPE)) ||
(unix_socket && !strcmp(unix_socket,MYSQL_NAMEDPIPE)))
{
net->last_errno= CR_SERVER_LOST;
strmov(net->last_error,ER(net->last_errno));
goto error; /* User only requested named pipes */
}
/* Try also with TCP/IP */
}
else
{
net->vio=vio_new_win32pipe(hPipe);
sprintf(host_info=buff, ER(CR_NAMEDPIPE_CONNECTION), host,
unix_socket);
}
}
}
if (hPipe == INVALID_HANDLE_VALUE)
#endif
{
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));
/* _WIN64 ; Assume that the (int) range is enough for socket() */
if ((sock = (my_socket) socket(AF_INET,SOCK_STREAM,0)) == SOCKET_ERROR)
{
net->last_errno=CR_IPSOCK_ERROR;
sprintf(net->last_error,ER(net->last_errno),socket_errno);
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)
{
my_gethostbyname_r_free();
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);
my_gethostbyname_r_free();
}
sock_addr.sin_port = (ushort) htons((ushort) port);
if (my_connect(sock,(struct sockaddr *) &sock_addr, sizeof(sock_addr),
mysql->options.connect_timeout) <0)
{
DBUG_PRINT("error",("Got error %d on connect to '%s'",socket_errno,host));
net->last_errno= CR_CONN_HOST_ERROR;
sprintf(net->last_error ,ER(CR_CONN_HOST_ERROR), host, socket_errno);
goto error;
}
}
if (!net->vio || my_net_init(net, net->vio))
{
vio_delete(net->vio);
net->vio = 0;
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 */
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;
}
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));
if (mysql->protocol_version != PROTOCOL_VERSION)
{
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 */
if (!(mysql->charset =
get_charset((uint8) mysql->server_language, MYF(0))))
mysql->charset = default_charset_info; /* shouldn't be fatal */
}
else
mysql->charset=default_charset_info;
if (!mysql->charset)
{
net->last_errno=CR_CANT_READ_CHARSET;
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);
}
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;
client_flag|=mysql->options.client_flag;
/* Send client information for access check */
client_flag|=CLIENT_CAPABILITIES;
#ifdef HAVE_OPENSSL
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;
if (mysql->options.use_ssl)
client_flag|=CLIENT_SSL;
#endif /* HAVE_OPENSSL */
if (db)
client_flag|=CLIENT_CONNECT_WITH_DB;
#ifdef HAVE_COMPRESS
if ((mysql->server_capabilities & CLIENT_COMPRESS) &&
(mysql->options.compress || (client_flag & CLIENT_COMPRESS)))
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
/*
Oops.. are we careful enough to not send ANY information without
encryption?
*/
if (client_flag & CLIENT_SSL)
{
struct st_mysql_options *options= &mysql->options;
if (my_net_write(net,buff,(uint) (2)) || net_flush(net))
{
net->last_errno= CR_SERVER_LOST;
strmov(net->last_error,ER(net->last_errno));
goto error;
}
/* Do the SSL layering. */
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;
}
DBUG_PRINT("info", ("IO layer change in progress..."));
/* 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));
DBUG_PRINT("info", ("IO layer change done!"));
}
#endif /* HAVE_OPENSSL */
DBUG_PRINT("info",("Server version = '%s' capabilites: %ld status: %d client_flag: %d",
mysql->server_version,mysql->server_capabilities,
mysql->server_status, client_flag));
int3store(buff+2,max_allowed_packet);
if (user && user[0])
strmake(buff+5,user,32); /* Max user name */
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))
{
end=strmake(end+1,db,NAME_LEN);
mysql->db=my_strdup(db,MYF(MY_WME));
db=0;
}
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)
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;
}
if (mysql->options.rpl_probe && mysql_rpl_probe(mysql))
goto error;
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);
}
/* needed when we move MYSQL structure to a different address */
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;
}
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)
{
/* Allow reconnect next time */
mysql->server_status&= ~SERVER_STATUS_IN_TRANS;
mysql->net.last_errno=CR_SERVER_GONE_ERROR;
strmov(mysql->net.last_error,ER(mysql->net.last_errno));
DBUG_RETURN(1);
}
mysql_init(&tmp_mysql);
tmp_mysql.options=mysql->options;
bzero((char*) &mysql->options,sizeof(mysql->options));
tmp_mysql.rpl_pivot = mysql->rpl_pivot;
if (!mysql_real_connect(&tmp_mysql,mysql->host,mysql->user,mysql->passwd,
mysql->db, mysql->port, mysql->unix_socket,
mysql->client_flag))
{
mysql->net.last_errno= tmp_mysql.net.last_errno;
strmov(mysql->net.last_error, tmp_mysql.net.last_error);
DBUG_RETURN(1);
}
tmp_mysql.free_me=mysql->free_me;
mysql->free_me=0;
mysql_close(mysql);
*mysql=tmp_mysql;
mysql_fix_pointers(mysql, &tmp_mysql); /* adjust connection pointers */
net_clear(&mysql->net);
mysql->affected_rows= ~(my_ulonglong) 0;
DBUG_RETURN(0);
}
/**************************************************************************
Change user and database
**************************************************************************/
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 : "");
if (simple_command(mysql,COM_CHANGE_USER, buff,(ulong) (pos-buff),0))
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);
}
/**************************************************************************
Set current database
**************************************************************************/
int STDCALL
mysql_select_db(MYSQL *mysql, const char *db)
{
int error;
DBUG_ENTER("mysql_select_db");
DBUG_PRINT("enter",("db: '%s'",db));
if ((error=simple_command(mysql,COM_INIT_DB,db,(ulong) strlen(db),0)))
DBUG_RETURN(error);
my_free(mysql->db,MYF(MY_ALLOW_ZERO_PTR));
mysql->db=my_strdup(db,MYF(MY_WME));
DBUG_RETURN(0);
}
/*************************************************************************
Send a QUIT to the server and close the connection
If handle is alloced by mysql connect free it.
*************************************************************************/
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 */
mysql->reconnect=0;
simple_command(mysql,COM_QUIT,NullS,0,1);
end_server(mysql); /* Sets mysql->net.vio= 0 */
}
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));
#ifdef HAVE_OPENSSL
mysql_ssl_free(mysql);
#endif /* HAVE_OPENSSL */
/* Clear pointers for better safety */
mysql->host_info=mysql->user=mysql->passwd=mysql->db=0;
bzero((char*) &mysql->options,sizeof(mysql->options));
/* 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;
}
mysql->rpl_pivot=0;
}
if (mysql != mysql->master)
mysql_close(mysql->master);
if (mysql->free_me)
my_free((gptr) mysql,MYF(0));
}
DBUG_VOID_RETURN;
}
/**************************************************************************
Do a query. If query returned rows, free old rows.
Read data by mysql_store_result or by repeat call of mysql_fetch_row
**************************************************************************/
int STDCALL
mysql_query(MYSQL *mysql, const char *query)
{
return mysql_real_query(mysql,query, (uint) strlen(query));
}
static MYSQL* spawn_init(MYSQL* parent, const char* host,
unsigned int port, const char* user,
const char* passwd)
{
MYSQL* child;
if (!(child = mysql_init(0)))
return 0;
child->options.user = my_strdup((user) ? user :
(parent->user ? parent->user :
parent->options.user), MYF(0));
child->options.password = my_strdup((passwd) ? passwd :
(parent->passwd ?
parent->passwd :
parent->options.password), MYF(0));
child->options.port = port;
child->options.host = my_strdup((host) ? host :
(parent->host ?
parent->host :
parent->options.host), MYF(0));
if (parent->db)
child->options.db = my_strdup(parent->db, MYF(0));
else if (parent->options.db)
child->options.db = my_strdup(parent->options.db, MYF(0));
child->options.rpl_parse = child->options.rpl_probe = child->rpl_pivot = 0;
return child;
}
int
STDCALL mysql_set_master(MYSQL* mysql, const char* host,
unsigned int port, const char* user,
const char* passwd)
{
if (mysql->master != mysql && !mysql->master->rpl_pivot)
mysql_close(mysql->master);
if (!(mysql->master = spawn_init(mysql, host, port, user, passwd)))
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;
if (!(slave = spawn_init(mysql, host, port, user, passwd)))
return 1;
slave->next_slave = mysql->next_slave;
mysql->next_slave = slave;
return 0;
}
/*
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.
*/
int STDCALL
mysql_send_query(MYSQL* mysql, const char* query, ulong length)
{
if (mysql->options.rpl_parse && mysql->rpl_pivot)
{
switch (mysql_rpl_query_type(query, length)) {
case MYSQL_RPL_MASTER:
return mysql_master_send_query(mysql, query, length);
case MYSQL_RPL_SLAVE:
return mysql_slave_send_query(mysql, query, length);
case MYSQL_RPL_ADMIN:
break; /* fall through */
}
}
mysql->last_used_con = mysql;
return simple_command(mysql, COM_QUERY, query, length, 1);
}
my_bool STDCALL mysql_read_query_result(MYSQL *mysql)
{
uchar *pos;
ulong field_count;
MYSQL_DATA *fields;
ulong length;
DBUG_ENTER("mysql_read_query_result");
/*
Read from the connection which we actually used, which
could differ from the original connection if we have slaves
*/
mysql = mysql->last_used_con;
if ((length = net_safe_read(mysql)) == packet_error)
DBUG_RETURN(1);
free_old_query(mysql); /* Free old result */
get_info:
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);
if (mysql->server_capabilities & CLIENT_PROTOCOL_41)
{
mysql->server_status=uint2korr(pos); pos+=2;
mysql->warning_count=uint2korr(pos); pos+=2;
}
else if (mysql->server_capabilities & CLIENT_TRANSACTIONS)
{
mysql->server_status=uint2korr(pos); pos+=2;
mysql->warning_count= 0;
}
DBUG_PRINT("info",("status: %ld warning_count: %ld",
mysql->server_status, mysql->warning_count));
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)
DBUG_RETURN(1);
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 */
if (!(fields=read_rows(mysql,(MYSQL_FIELD*)0, (protocol_41(mysql) ? 8 : 5))))
DBUG_RETURN(1);
if (!(mysql->fields=unpack_fields(fields,&mysql->field_alloc,
(uint) field_count,0,
mysql->server_capabilities)))
DBUG_RETURN(1);
mysql->status= MYSQL_STATUS_GET_RESULT;
mysql->field_count= (uint) field_count;
mysql->warning_count= 0;
DBUG_RETURN(0);
}
int STDCALL
mysql_real_query(MYSQL *mysql, const char *query, ulong length)
{
DBUG_ENTER("mysql_real_query");
DBUG_PRINT("enter",("handle: %lx",mysql));
DBUG_PRINT("query",("Query = \"%s\"",query));
if (mysql_send_query(mysql,query,length))
DBUG_RETURN(1);
DBUG_RETURN((int) mysql_read_query_result(mysql));
}
static my_bool
send_file_to_server(MYSQL *mysql, const char *filename)
{
int fd, readcount;
my_bool result= 1;
uint packet_length=MY_ALIGN(mysql->net.max_packet-16,IO_SIZE);
char *buf, tmp_name[FN_REFLEN];
DBUG_ENTER("send_file_to_server");
if (!(buf=my_malloc(packet_length,MYF(0))))
{
strmov(mysql->net.last_error, ER(mysql->net.last_errno=CR_OUT_OF_MEMORY));
DBUG_RETURN(1);
}
fn_format(tmp_name,filename,"","",4); /* Convert to client format */
if ((fd = my_open(tmp_name,O_RDONLY, MYF(0))) < 0)
{
my_net_write(&mysql->net,"",0); /* Server needs one packet */
net_flush(&mysql->net);
mysql->net.last_errno=EE_FILENOTFOUND;
my_snprintf(mysql->net.last_error,sizeof(mysql->net.last_error)-1,
EE(mysql->net.last_errno),tmp_name, errno);
goto err;
}
while ((readcount = (int) my_read(fd,(byte*) buf,packet_length,MYF(0))) > 0)
{
if (my_net_write(&mysql->net,buf,readcount))
{
DBUG_PRINT("error",("Lost connection to MySQL server during LOAD DATA of local file"));
mysql->net.last_errno=CR_SERVER_LOST;
strmov(mysql->net.last_error,ER(mysql->net.last_errno));
goto err;
}
}
/* 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;
sprintf(mysql->net.last_error,ER(mysql->net.last_errno),errno);
goto err;
}
if (readcount < 0)
{
mysql->net.last_errno=EE_READ; /* the errmsg for not entire file read */
my_snprintf(mysql->net.last_error,sizeof(mysql->net.last_error)-1,
tmp_name,errno);
goto err;
}
result=0; /* Ok */
err:
if (fd >= 0)
(void) my_close(fd,MYF(0));
my_free(buf,MYF(0));
DBUG_RETURN(result);
}
/**************************************************************************
Alloc result struct for buffered results. All rows are read to buffer.
mysql_data_seek may be used.
**************************************************************************/
MYSQL_RES * STDCALL
mysql_store_result(MYSQL *mysql)
{
MYSQL_RES *result;
DBUG_ENTER("mysql_store_result");
/* read from the actually used connection */
mysql = mysql->last_used_con;
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 */
if (!(result=(MYSQL_RES*) my_malloc((uint) (sizeof(MYSQL_RES)+
sizeof(ulong) *
mysql->field_count),
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 */
}
/**************************************************************************
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).
**************************************************************************/
MYSQL_RES * STDCALL
mysql_use_result(MYSQL *mysql)
{
MYSQL_RES *result;
DBUG_ENTER("mysql_use_result");
mysql = mysql->last_used_con;
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 */
}
/**************************************************************************
Return next field of the query results
**************************************************************************/
MYSQL_FIELD * STDCALL
mysql_fetch_field(MYSQL_RES *result)
{
if (result->current_field >= result->field_count)
return(NULL);
return &result->fields[result->current_field++];
}
/**************************************************************************
Return next row of the query results
**************************************************************************/
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;
/* Don't clear handle in mysql_free_results */
res->handle=0;
}
}
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);
}
}
/**************************************************************************
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.
**************************************************************************/
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 */
*prev_length= (ulong) (*column-start-1);
start= *column;
prev_length=lengths;
}
}
return res->lengths;
}
/**************************************************************************
Move to a specific row and column
**************************************************************************/
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;
}
/*************************************************************************
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
*************************************************************************/
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;
}
/*****************************************************************************
List all databases
*****************************************************************************/
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));
}
/*****************************************************************************
List all tables in a database
If wild is given then only the tables matching wild is returned
*****************************************************************************/
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));
}
/**************************************************************************
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"
**************************************************************************/
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);
if (simple_command(mysql,COM_FIELD_LIST,buff,(ulong) (end-buff),1) ||
!(query = read_rows(mysql,(MYSQL_FIELD*) 0,
(protocol_41(mysql) ? 9 : 6))))
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,
result->field_count, 1,
mysql->server_capabilities);
result->eof=1;
DBUG_RETURN(result);
}
/* 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);
if (!(fields = read_rows(mysql,(MYSQL_FIELD*)0,protocol_41(mysql) ? 8: 5)))
DBUG_RETURN(NULL);
if (!(mysql->fields=unpack_fields(fields,&mysql->field_alloc,field_count,0,
mysql->server_capabilities)))
DBUG_RETURN(0);
mysql->status=MYSQL_STATUS_GET_RESULT;
mysql->field_count=field_count;
DBUG_RETURN(mysql_store_result(mysql));
}
#ifdef USE_OLD_FUNCTIONS
int STDCALL
mysql_create_db(MYSQL *mysql, const char *db)
{
DBUG_ENTER("mysql_createdb");
DBUG_PRINT("enter",("db: %s",db));
DBUG_RETURN(simple_command(mysql,COM_CREATE_DB,db, (ulong) strlen(db),0));
}
int STDCALL
mysql_drop_db(MYSQL *mysql, const char *db)
{
DBUG_ENTER("mysql_drop_db");
DBUG_PRINT("enter",("db: %s",db));
DBUG_RETURN(simple_command(mysql,COM_DROP_DB,db,(ulong) strlen(db),0));
}
#endif
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));
}
const char * STDCALL
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));
}
const char * STDCALL
mysql_get_server_info(MYSQL *mysql)
{
return((char*) mysql->server_version);
}
const char * STDCALL
mysql_get_host_info(MYSQL *mysql)
{
return(mysql->host_info);
}
uint STDCALL
mysql_get_proto_info(MYSQL *mysql)
{
return (mysql->protocol_version);
}
const char * STDCALL
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:
mysql->options.compress= 1; /* Remember for connect */
break;
case MYSQL_OPT_NAMED_PIPE:
mysql->options.named_pipe=1; /* Force named pipe */
break;
case MYSQL_OPT_LOCAL_INFILE: /* Allow LOAD DATA LOCAL ?*/
if (!arg || test(*(uint*) arg))
mysql->options.client_flag|= CLIENT_LOCAL_FILES;
else
mysql->options.client_flag&= ~CLIENT_LOCAL_FILES;
break;
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;
default:
DBUG_RETURN(1);
}
DBUG_RETURN(0);
}
/****************************************************************************
Functions to get information from the MySQL structure
These are functions to make shared libraries more usable.
****************************************************************************/
/* 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;
}
MYSQL_ROW_OFFSET STDCALL mysql_row_tell(MYSQL_RES *res)
{
return res->data_cursor;
}
MYSQL_FIELD_OFFSET STDCALL mysql_field_tell(MYSQL_RES *res)
{
return (res)->current_field;
}
/* MYSQL */
unsigned int STDCALL mysql_field_count(MYSQL *mysql)
{
return mysql->last_used_con->field_count;
}
my_ulonglong STDCALL mysql_affected_rows(MYSQL *mysql)
{
return mysql->last_used_con->affected_rows;
}
my_ulonglong STDCALL mysql_insert_id(MYSQL *mysql)
{
return mysql->last_used_con->insert_id;
}
uint STDCALL mysql_errno(MYSQL *mysql)
{
return mysql->net.last_errno;
}
const char * STDCALL mysql_error(MYSQL *mysql)
{
return mysql->net.last_error;
}
uint STDCALL mysql_warning_count(MYSQL *mysql)
{
return mysql->warning_count;
}
const char *STDCALL mysql_info(MYSQL *mysql)
{
return mysql->info;
}
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
}
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));
}
/****************************************************************************
Some support functions
****************************************************************************/
/*
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;
net->retry_count= 1;
net->max_packet_size= max(net_buffer_length, max_allowed_packet);
}
/*
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
*/
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;
}
/********************************************************************
Implementation of new client-server prototypes for 4.1 version
starts from here ..
mysql_* are real prototypes used by applications
*********************************************************************/
/********************************************************************
Misc Utility functions
********************************************************************/
/*
Set the internal stmt error messages
*/
static void set_stmt_error(MYSQL_STMT * stmt, int errcode)
{
DBUG_ENTER("set_stmt_error");
DBUG_PRINT("enter", ("error: %d '%s'", errcode, ER(errcode)));
DBUG_ASSERT(stmt != 0);
stmt->last_errno= errcode;
strmov(stmt->last_error, ER(errcode));
DBUG_VOID_RETURN;
}
/*
Copy error message to statement handler
*/
static void set_stmt_errmsg(MYSQL_STMT * stmt, char *err, int errcode)
{
DBUG_ENTER("set_stmt_error_msg");
DBUG_PRINT("enter", ("error: %d '%s'", errcode, err));
DBUG_ASSERT(stmt != 0);
stmt->last_errno= errcode;
if (err && err[0])
strmov(stmt->last_error, err);
DBUG_VOID_RETURN;
}
/*
Set the internal error message to mysql handler
*/
static void set_mysql_error(MYSQL * mysql, int errcode)
{
DBUG_ENTER("set_mysql_error");
DBUG_PRINT("enter", ("error :%d '%s'", errcode, ER(errcode)));
DBUG_ASSERT(mysql != 0);
mysql->net.last_errno= errcode;
strmov(mysql->net.last_error, ER(errcode));
}
/*
Reallocate the NET package to be at least of 'length' bytes
SYNPOSIS
my_realloc_str()
net The NET structure to modify
int length Ensure that net->buff is at least this big
RETURN VALUES
0 ok
1 Error
*/
static my_bool my_realloc_str(NET *net, ulong length)
{
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)
{
res= net_realloc(net, buf_length + length);
net->write_pos= net->buff+ buf_length;
}
DBUG_RETURN(res);
}
/********************************************************************
Prepare related implementations
********************************************************************/
/*
Read the prepare statement results ..
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
*/
static my_bool read_prepare_result(MYSQL *mysql, MYSQL_STMT *stmt)
{
uchar *pos;
uint field_count;
MYSQL_DATA *fields_data;
ulong length;
DBUG_ENTER("read_prepare_result");
mysql= mysql->last_used_con;
if ((length= net_safe_read(mysql)) == packet_error)
DBUG_RETURN(1);
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;
if (field_count != 0)
{
if (!(mysql->server_status & SERVER_STATUS_AUTOCOMMIT))
mysql->server_status|= SERVER_STATUS_IN_TRANS;
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))))
{
set_stmt_error(stmt, CR_OUT_OF_MEMORY);
DBUG_RETURN(0);
}
stmt->bind= (stmt->params + stmt->param_count);
stmt->field_count= (uint) field_count;
mysql->status= MYSQL_STATUS_READY;
DBUG_RETURN(0);
}
/*
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
*/
/* QQ The follwing function will be removed after next merge */
static char *my_strdup_with_length(const byte *from, uint length, myf MyFlags)
{
gptr ptr;
if ((ptr=my_malloc(length+1,MyFlags)) != 0)
{
memcpy((byte*) ptr, (byte*) from,(size_t) length);
((char*) ptr)[length]=0;
}
return((char*) ptr);
}
MYSQL_STMT *STDCALL
mysql_prepare(MYSQL *mysql, const char *query, ulong length)
{
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
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);
DBUG_RETURN(0);
}
if (simple_command(mysql, COM_PREPARE, query, length, 1))
{
mysql_stmt_close(stmt);
DBUG_RETURN(0);
}
stmt->state= MY_ST_PREPARE;
init_alloc_root(&stmt->mem_root,8192,0);
if (read_prepare_result(mysql, stmt))
{
mysql_stmt_close(stmt);
DBUG_RETURN(0);
}
stmt->mysql= mysql;
DBUG_PRINT("info", ("Parameter count: %ld", stmt->param_count));
DBUG_RETURN(stmt);
}
/*
Returns prepared meta information in the form of resultset
to client.
*/
MYSQL_RES * STDCALL
mysql_prepare_result(MYSQL_STMT *stmt)
{
MYSQL_RES *result;
DBUG_ENTER("mysql_prepare_result");
if (!stmt->fields)
DBUG_RETURN(0);
result= &stmt->tmp_result;
bzero((char*) result, sizeof(MYSQL_RES));
result->eof=1; /* Marker for buffered */
result->fields= stmt->fields;
result->field_count= stmt->field_count;
DBUG_RETURN(result);
}
/********************************************************************
Prepare-execute, and param handling
*********************************************************************/
/*
Store the buffer type
*/
static void store_param_type(NET *net, uint type)
{
int2store(net->write_pos, type);
net->write_pos+=2;
}
/*
Store the length of parameter data
(Same function as in sql/net_pkg.cc)
*/
char *
net_store_length(char *pkg, ulong length)
{
uchar *packet=(uchar*) pkg;
if (length < 251)
{
*packet=(uchar) length;
return (char*) packet+1;
}
/* 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;
}
/****************************************************************************
Functions to store parameter data from a prepared statement.
All functions has the following characteristics:
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;
}
static void store_param_short(NET *net, MYSQL_BIND *param)
{
short value= *(short*) param->buffer;
int2store(net->write_pos,value);
net->write_pos+=2;
}
static void store_param_int32(NET *net, MYSQL_BIND *param)
{
int32 value= *(int32*) param->buffer;
int4store(net->write_pos,value);
net->write_pos+=4;
}
static void store_param_int64(NET *net, MYSQL_BIND *param)
{
longlong value= *(longlong*) param->buffer;
int8store(net->write_pos,value);
net->write_pos+= 8;
}
static void store_param_float(NET *net, MYSQL_BIND *param)
{
float value= *(float*) param->buffer;
float4store(net->write_pos, value);
net->write_pos+= 4;
}
static void store_param_double(NET *net, MYSQL_BIND *param)
{
double value= *(double*) param->buffer;
float8store(net->write_pos, value);
net->write_pos+= 8;
}
static void store_param_str(NET *net, MYSQL_BIND *param)
{
ulong length= *param->length;
char *to= (char *) net_store_length((char *) net->write_pos, length);
memcpy(to, param->buffer, length);
net->write_pos+= length;
}
/*
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
*/
static void store_param_null(NET *net, MYSQL_BIND *param)
{
uint pos= param->param_number;
(uchar) net->buff[pos/8]|= (1 << pos & 7);
}
/*
Set parameter data by reading from input buffers from the
client application
*/
static my_bool store_param(MYSQL_STMT *stmt, MYSQL_BIND *param)
{
MYSQL *mysql= stmt->mysql;
NET *net = &mysql->net;
DBUG_ENTER("store_param");
DBUG_PRINT("enter",("type : %d, buffer :%lx", param->buffer_type,
param->buffer));
/* 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);
DBUG_RETURN(1);
}
/*
Send the prepare query to server for execution
*/
static my_bool execute(MYSQL_STMT * stmt, char *packet, ulong length)
{
MYSQL *mysql= stmt->mysql;
NET *net= &mysql->net;
char buff[4];
DBUG_ENTER("execute");
DBUG_PRINT("enter",("packet: %s, length :%d",packet ? packet :" ", length));
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) ||
mysql_read_query_result(mysql))
{
set_stmt_errmsg(stmt, net->last_error, net->last_errno);
DBUG_RETURN(1);
}
stmt->state= MY_ST_EXECUTE;
if (stmt->bind)
{
mysql_free_result(stmt->result);
stmt->result= mysql_store_result(mysql);
}
DBUG_RETURN(0);
}
/*
Execute the prepare query
*/
int STDCALL mysql_execute(MYSQL_STMT *stmt)
{
ulong length;
uint null_count;
DBUG_ENTER("mysql_execute");
if (stmt->state == MY_ST_UNKNOWN)
{
set_stmt_error(stmt, CR_NO_PREPARE_STMT);
DBUG_RETURN(1);
}
stmt->mysql->fields= stmt->fields;
if (stmt->param_count)
{
NET *net= &stmt->mysql->net;
MYSQL_BIND *param, *param_end;
char *param_data;
my_bool result;
if (!stmt->params)
{
/* Parameters exists, but no bound buffers */
set_stmt_error(stmt, CR_NOT_ALL_PARAMS_BOUND);
DBUG_RETURN(1);
}
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)
{
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++)
{
/* 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);
}
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);
}
net->write_pos= net->buff; /* Reset for net_write() */
result= execute(stmt, param_data, length);
my_free(param_data, MYF(MY_WME));
DBUG_RETURN(result);
}
DBUG_RETURN((int) execute(stmt,0,0));
}
/*
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);
}
/*
Setup the parameter data buffers from application
*/
my_bool STDCALL mysql_bind_param(MYSQL_STMT *stmt, MYSQL_BIND * bind)
{
uint count=0;
MYSQL_BIND *param, *end;
DBUG_ENTER("mysql_bind_param");
#ifdef CHECK_EXTRA_ARGUMENTS
if (stmt->state == MY_ST_UNKNOWN)
{
set_stmt_error(stmt, CR_NO_PREPARE_STMT);
DBUG_RETURN(1);
}
if (!stmt->param_count)
{
set_stmt_error(stmt, CR_NO_PARAMETERS_EXISTS);
DBUG_RETURN(1);
}
#endif
/* 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++)
{
param->param_number= count++;
if (param->is_long_data &&
(param->buffer_type < MYSQL_TYPE_TINY_BLOB ||
param->buffer_type > MYSQL_TYPE_STRING))
{
/*
Long data handling should be used only for string/binary
types only
*/
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);
}
}
/* We have to send/resendtype information to MySQL */
stmt->types_supplied= 0;
DBUG_RETURN(0);
}
/********************************************************************
Long data implementation
*********************************************************************/
/*
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
*/
my_bool STDCALL
mysql_send_long_data(MYSQL_STMT *stmt, uint param_number,
const char *data, ulong length,
my_bool last_data)
{
MYSQL_BIND *param;
DBUG_ENTER("mysql_send_long_data");
DBUG_ASSERT(stmt != 0);
DBUG_PRINT("enter",("param no : %d, data : %lx, length : %ld",
param_number, data, length));
if (param_number >= stmt->param_count)
{
set_stmt_error(stmt, CR_INVALID_PARAMETER_NO);
DBUG_RETURN(1);
}
param= stmt->params+param_number;
if (length)
{
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;
/*
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))
{
set_stmt_errmsg(stmt,(char *) mysql->net.last_error,
mysql->net.last_errno);
DBUG_RETURN(1);
}
}
param->long_ended= last_data;
DBUG_RETURN(0);
}
/********************************************************************
Fetch-bind related implementations
*********************************************************************/
/*
Setup the bind buffers for resultset processing
*/
my_bool STDCALL mysql_bind_result(MYSQL_STMT *stmt, MYSQL_BIND *bind)
{
MYSQL_BIND *param, *end;
ulong bind_count;
DBUG_ENTER("mysql_bind_result");
DBUG_ASSERT(stmt != 0);
#ifdef EXTRA_CHECK_ARGUMENTS
if (!bind)
{
set_stmt_error(stmt, CR_NULL_POINTER);
DBUG_RETURN(1);
}
#endif
bind_count= stmt->result->field_count;
memcpy((char*) stmt->bind, (char*) bind,
sizeof(MYSQL_BIND)*bind_count);
for (param= stmt->bind, end= param+bind_count; param < end ; param++)
{
/* TODO: Set up convert functions like in mysql_bind_param */
}
DBUG_RETURN(0);
}
/*
Fetch row data to bind buffers
*/
static my_bool
my_fetch_row(MYSQL_STMT *stmt, MYSQL_RES *result, const byte *row)
{
MYSQL_BIND *bind, *end;
uchar *null_ptr= (uchar*) row, bit;
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++)
{
if (*null_ptr & bit)
bind->is_null= 1;
else
{
bind->is_null= 0;
row= (byte*) (*bind->fetch_result)(bind, (char*) row);
}
if (! (bit<<=1) & 255)
{
bit=1; /* To next byte */
null_ptr++;
}
}
return 0;
}
static int
read_binary_data(MYSQL *mysql)
{
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 */
return 0;
}
/*
Fetch and return row data to bound buffers, if any
*/
int STDCALL mysql_fetch(MYSQL_STMT *stmt)
{
MYSQL_RES *result;
DBUG_ENTER("mysql_fetch");
result= stmt->result;
if (!result)
DBUG_RETURN(MYSQL_NO_DATA);
if (!result->data)
{
MYSQL *mysql= stmt->mysql;
if (!result->eof)
{
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 */
{
set_stmt_errmsg(stmt,(char *)mysql->net.last_error,
mysql->net.last_errno);
DBUG_RETURN(MYSQL_STATUS_ERROR);
}
}
DBUG_RETURN(MYSQL_NO_DATA); /* no more data */
}
{
/*
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.
*/
MYSQL_ROW values;
if (!result->data_cursor)
{
DBUG_PRINT("info", ("end of data"));
result->current_row= (MYSQL_ROW) NULL;
DBUG_RETURN(MYSQL_NO_DATA);
}
values= result->data_cursor->data;
result->data_cursor= result->data_cursor->next;
DBUG_RETURN((int) my_fetch_row(stmt,result, (byte*) values));
}
DBUG_RETURN(0);
}
/********************************************************************
Misc function implementations
*********************************************************************/
/*
Close the statement handle by freeing all resources
*/
my_bool STDCALL mysql_stmt_close(MYSQL_STMT *stmt)
{
my_bool error=0;
DBUG_ENTER("mysql_stmt_close");
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));
my_free((gptr) stmt->bind, MY_ALLOW_ZERO_PTR);
my_free((gptr) stmt->params, MY_ALLOW_ZERO_PTR);
my_free((gptr) stmt, MYF(MY_WME));
DBUG_RETURN(error);
}
/*
Return statement error code
*/
uint STDCALL mysql_stmt_errno(MYSQL_STMT * stmt)
{
DBUG_ENTER("mysql_stmt_errno");
DBUG_RETURN(stmt->last_errno);
}
/*
Return statement error message
*/
const char *STDCALL mysql_stmt_error(MYSQL_STMT * stmt)
{
DBUG_ENTER("mysql_stmt_error");
DBUG_RETURN(stmt->last_error);
}
/*
Commit the current transaction
*/
my_bool STDCALL mysql_commit(MYSQL * mysql)
{
DBUG_ENTER("mysql_commit");
DBUG_RETURN((my_bool) mysql_real_query(mysql, "commit", 6));
}
/*
Rollback the current transaction
*/
my_bool STDCALL mysql_rollback(MYSQL * mysql)
{
DBUG_ENTER("mysql_rollback");
DBUG_RETURN((my_bool) mysql_real_query(mysql, "rollback", 8));
}
/*
Set autocommit to either true or false
*/
my_bool STDCALL mysql_autocommit(MYSQL * mysql, my_bool auto_mode)
{
DBUG_ENTER("mysql_autocommit");
DBUG_PRINT("enter", ("mode : %d", auto_mode));
if (auto_mode) /* set to true */
DBUG_RETURN((my_bool) mysql_real_query(mysql, "set autocommit=1", 16));
DBUG_RETURN((my_bool) mysql_real_query(mysql, "set autocommit=0", 16));
}
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