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libmysql.c
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/* Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include <my_global.h>
#include <my_sys.h>
#include <my_time.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 "my_thread_local.h"
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifdef HAVE_POLL
#include <sys/poll.h>
#endif
#ifdef HAVE_SYS_UN_H
#include <sys/un.h>
#endif
#if !defined(_WIN32)
#include <my_thread.h> /* because of signal() */
#endif
#ifndef INADDR_NONE
#define INADDR_NONE -1
#endif
#include <sql_common.h>
#include "client_settings.h"
#include "mysql_trace.h"
#ifdef EMBEDDED_LIBRARY
#undef net_flush
my_bool net_flush(NET *net);
#endif
#if defined(_WIN32)
/* socket_errno is defined in my_global.h for all platforms */
#define perror(A)
#else
#include <errno.h>
#define SOCKET_ERROR -1
#endif /* _WIN32 */
/*
If allowed through some configuration, then this needs to
be changed
*/
#define MAX_LONG_DATA_LENGTH 8192
#define unsigned_field(A) ((A)->flags & UNSIGNED_FLAG)
static void append_wild(char *to,char *end,const char *wild);
static my_bool mysql_client_init= 0;
static my_bool org_my_init_done= 0;
typedef struct st_mysql_stmt_extension
{
MEM_ROOT fields_mem_root;
} MYSQL_STMT_EXT;
/*
Initialize the MySQL client library
SYNOPSIS
mysql_server_init()
NOTES
Should be called before doing any other calls to the MySQL
client library to initialize thread specific variables etc.
It's called by mysql_init() to ensure that things will work for
old not threaded applications that doesn't call mysql_server_init()
directly.
RETURN
0 ok
1 could not initialize environment (out of memory or thread keys)
*/
int STDCALL mysql_server_init(int argc MY_ATTRIBUTE((unused)),
char **argv MY_ATTRIBUTE((unused)),
char **groups MY_ATTRIBUTE((unused)))
{
int result= 0;
if (!mysql_client_init)
{
mysql_client_init=1;
org_my_init_done=my_init_done;
if (my_init()) /* Will init threads */
return 1;
init_client_errs();
if (mysql_client_plugin_init())
return 1;
#if defined (HAVE_OPENSSL) && !defined(HAVE_YASSL)
ssl_start();
#endif
if (!mysql_port)
{
char *env;
struct servent *serv_ptr MY_ATTRIBUTE((unused));
mysql_port = MYSQL_PORT;
/*
if builder specifically requested a default port, use that
(even if it coincides with our factory default).
only if they didn't do we check /etc/services (and, failing
on that, fall back to the factory default of 3306).
either default can be overridden by the environment variable
MYSQL_TCP_PORT, which in turn can be overridden with command
line options.
*/
#if MYSQL_PORT_DEFAULT == 0
if ((serv_ptr= getservbyname("mysql", "tcp")))
mysql_port= (uint) ntohs((ushort) serv_ptr->s_port);
#endif
if ((env= getenv("MYSQL_TCP_PORT")))
mysql_port=(uint) atoi(env);
}
if (!mysql_unix_port)
{
char *env;
#ifdef _WIN32
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(_WIN32)
(void) signal(SIGPIPE, SIG_IGN);
#endif
#ifdef EMBEDDED_LIBRARY
if (argc > -1)
result= init_embedded_server(argc, argv, groups);
#endif
}
else
result= (int)my_thread_init(); /* Init if new thread */
return result;
}
/*
Free all memory and resources used by the client library
NOTES
When calling this there should not be any other threads using
the library.
To make things simpler when used with windows dll's (which calls this
function automaticly), it's safe to call this function multiple times.
*/
void STDCALL mysql_server_end()
{
if (!mysql_client_init)
return;
mysql_client_plugin_deinit();
#ifdef EMBEDDED_LIBRARY
end_embedded_server();
#endif
finish_client_errs();
vio_end();
/* If library called my_init(), free memory allocated by it */
if (!org_my_init_done)
{
my_end(0);
}
else
{
free_charsets();
mysql_thread_end();
}
mysql_client_init= org_my_init_done= 0;
}
my_bool STDCALL mysql_thread_init()
{
return my_thread_init();
}
void STDCALL mysql_thread_end()
{
my_thread_end();
}
/*
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=my_stpcpy(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 MY_ATTRIBUTE((unused)))
{
#ifndef DBUG_OFF
char *env;
if (debug)
{
DBUG_PUSH(debug);
}
else if ((env = getenv("MYSQL_DEBUG")))
{
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];
buff[sizeof(buff)-1]= 0;
strxnmov(buff,sizeof(buff)-1,"libmysql: ", env, NullS);
MessageBox((HWND) 0,"Debugging variable MYSQL_DEBUG used",buff,MB_OK);
}
#endif
}
#endif
}
/**************************************************************************
Change user and database
**************************************************************************/
my_bool STDCALL mysql_change_user(MYSQL *mysql, const char *user,
const char *passwd, const char *db)
{
int rc;
CHARSET_INFO *saved_cs= mysql->charset;
char *saved_user= mysql->user;
char *saved_passwd= mysql->passwd;
char *saved_db= mysql->db;
DBUG_ENTER("mysql_change_user");
/* Get the connection-default character set. */
if (mysql_init_character_set(mysql))
{
mysql->charset= saved_cs;
DBUG_RETURN(TRUE);
}
/*
Use an empty string instead of NULL.
Alloc user and password on heap because mysql_reconnect()
calls mysql_close() on success.
*/
mysql->user= my_strdup(PSI_NOT_INSTRUMENTED, user ? user : "", MYF(MY_WME));
mysql->passwd= my_strdup(PSI_NOT_INSTRUMENTED, passwd ? passwd : "",
MYF(MY_WME));
mysql->db= 0;
rc= run_plugin_auth(mysql, 0, 0, 0, db);
MYSQL_TRACE_STAGE(mysql, READY_FOR_COMMAND);
/*
The server will close all statements no matter was the attempt
to change user successful or not.
*/
mysql_detach_stmt_list(&mysql->stmts, "mysql_change_user");
if (rc == 0)
{
/* Free old connect information */
my_free(saved_user);
my_free(saved_passwd);
my_free(saved_db);
/* alloc new connect information */
mysql->db= db ? my_strdup(PSI_NOT_INSTRUMENTED,
db, MYF(MY_WME)) : 0;
}
else
{
/* Free temporary connect information */
my_free(mysql->user);
my_free(mysql->passwd);
my_free(mysql->db);
/* Restore saved state */
mysql->charset= saved_cs;
mysql->user= saved_user;
mysql->passwd= saved_passwd;
mysql->db= saved_db;
}
DBUG_RETURN(rc);
}
#if defined(HAVE_GETPWUID) && defined(NO_GETPWUID_DECL)
struct passwd *getpwuid(uid_t);
char* getlogin(void);
#endif
#if !defined(_WIN32)
void read_user_name(char *name)
{
DBUG_ENTER("read_user_name");
if (geteuid() == 0)
(void) my_stpcpy(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
my_stpcpy(name,"UNKNOWN_USER");
#endif
}
DBUG_VOID_RETURN;
}
#else /* If Windows */
void read_user_name(char *name)
{
char *str=getenv("USER"); /* ODBC will send user variable */
strmake(name,str ? str : "ODBC", USERNAME_LENGTH);
}
#endif
my_bool handle_local_infile(MYSQL *mysql, const char *net_filename)
{
my_bool result= 1;
uint packet_length=MY_ALIGN(mysql->net.max_packet-16,IO_SIZE);
NET *net= &mysql->net;
int readcount;
void *li_ptr; /* pass state to local_infile functions */
char *buf; /* buffer to be filled by local_infile_read */
struct st_mysql_options *options= &mysql->options;
DBUG_ENTER("handle_local_infile");
/* check that we've got valid callback functions */
if (!(options->local_infile_init &&
options->local_infile_read &&
options->local_infile_end &&
options->local_infile_error))
{
/* if any of the functions is invalid, set the default */
mysql_set_local_infile_default(mysql);
}
/* copy filename into local memory and allocate read buffer */
if (!(buf=my_malloc(PSI_NOT_INSTRUMENTED,
packet_length, MYF(0))))
{
set_mysql_error(mysql, CR_OUT_OF_MEMORY, unknown_sqlstate);
DBUG_RETURN(1);
}
/* initialize local infile (open file, usually) */
if ((*options->local_infile_init)(&li_ptr, net_filename,
options->local_infile_userdata))
{
MYSQL_TRACE(SEND_FILE, mysql, (0, NULL));
(void) my_net_write(net,(const uchar*) "",0); /* Server needs one packet */
net_flush(net);
MYSQL_TRACE(PACKET_SENT, mysql, (0));
my_stpcpy(net->sqlstate, unknown_sqlstate);
net->last_errno=
(*options->local_infile_error)(li_ptr,
net->last_error,
sizeof(net->last_error)-1);
MYSQL_TRACE(ERROR, mysql, ());
goto err;
}
/* read blocks of data from local infile callback */
while ((readcount =
(*options->local_infile_read)(li_ptr, buf,
packet_length)) > 0)
{
MYSQL_TRACE(SEND_FILE, mysql, ((size_t)readcount, (const unsigned char*)buf));
if (my_net_write(net, (uchar*) buf, readcount))
{
DBUG_PRINT("error",
("Lost connection to MySQL server during LOAD DATA of local file"));
set_mysql_error(mysql, CR_SERVER_LOST, unknown_sqlstate);
goto err;
}
MYSQL_TRACE(PACKET_SENT, mysql, (readcount));
}
/* Send empty packet to mark end of file */
MYSQL_TRACE(SEND_FILE, mysql, (0, NULL));
if (my_net_write(net, (const uchar*) "", 0) || net_flush(net))
{
set_mysql_error(mysql, CR_SERVER_LOST, unknown_sqlstate);
goto err;
}
MYSQL_TRACE(PACKET_SENT, mysql, (0));
if (readcount < 0)
{
net->last_errno=
(*options->local_infile_error)(li_ptr,
net->last_error,
sizeof(net->last_error)-1);
MYSQL_TRACE(ERROR, mysql, ());
goto err;
}
result=0; /* Ok */
err:
/* free up memory allocated with _init, usually */
(*options->local_infile_end)(li_ptr);
my_free(buf);
DBUG_RETURN(result);
}
/****************************************************************************
Default handlers for LOAD LOCAL INFILE
****************************************************************************/
typedef struct st_default_local_infile
{
int fd;
int error_num;
const char *filename;
char error_msg[LOCAL_INFILE_ERROR_LEN];
} default_local_infile_data;
/*
Open file for LOAD LOCAL INFILE
SYNOPSIS
default_local_infile_init()
ptr Store pointer to internal data here
filename File name to open. This may be in unix format !
NOTES
Even if this function returns an error, the load data interface
guarantees that default_local_infile_end() is called.
RETURN
0 ok
1 error
*/
static int default_local_infile_init(void **ptr, const char *filename,
void *userdata MY_ATTRIBUTE ((unused)))
{
default_local_infile_data *data;
char tmp_name[FN_REFLEN];
if (!(*ptr= data= ((default_local_infile_data *)
my_malloc(PSI_NOT_INSTRUMENTED,
sizeof(default_local_infile_data), MYF(0)))))
return 1; /* out of memory */
data->error_msg[0]= 0;
data->error_num= 0;
data->filename= filename;
fn_format(tmp_name, filename, "", "", MY_UNPACK_FILENAME);
if ((data->fd = my_open(tmp_name, O_RDONLY, MYF(0))) < 0)
{
char errbuf[MYSYS_STRERROR_SIZE];
data->error_num= my_errno();
my_snprintf(data->error_msg, sizeof(data->error_msg)-1,
EE(EE_FILENOTFOUND), tmp_name, data->error_num,
my_strerror(errbuf, sizeof(errbuf), data->error_num));
return 1;
}
return 0; /* ok */
}
/*
Read data for LOAD LOCAL INFILE
SYNOPSIS
default_local_infile_read()
ptr Points to handle allocated by _init
buf Read data here
buf_len Ammount of data to read
RETURN
> 0 number of bytes read
== 0 End of data
< 0 Error
*/
static int default_local_infile_read(void *ptr, char *buf, uint buf_len)
{
int count;
default_local_infile_data*data = (default_local_infile_data *) ptr;
if ((count= (int) my_read(data->fd, (uchar *) buf, buf_len, MYF(0))) < 0)
{
char errbuf[MYSYS_STRERROR_SIZE];
data->error_num= EE_READ; /* the errmsg for not entire file read */
my_snprintf(data->error_msg, sizeof(data->error_msg)-1,
EE(EE_READ), data->filename,
my_errno(), my_strerror(errbuf, sizeof(errbuf), my_errno()));
}
return count;
}
/*
Read data for LOAD LOCAL INFILE
SYNOPSIS
default_local_infile_end()
ptr Points to handle allocated by _init
May be NULL if _init failed!
RETURN
*/
static void default_local_infile_end(void *ptr)
{
default_local_infile_data *data= (default_local_infile_data *) ptr;
if (data) /* If not error on open */
{
if (data->fd >= 0)
my_close(data->fd, MYF(MY_WME));
my_free(ptr);
}
}
/*
Return error from LOAD LOCAL INFILE
SYNOPSIS
default_local_infile_end()
ptr Points to handle allocated by _init
May be NULL if _init failed!
error_msg Store error text here
error_msg_len Max lenght of error_msg
RETURN
error message number
*/
static int
default_local_infile_error(void *ptr, char *error_msg, uint error_msg_len)
{
default_local_infile_data *data = (default_local_infile_data *) ptr;
if (data) /* If not error on open */
{
strmake(error_msg, data->error_msg, error_msg_len);
return data->error_num;
}
/* This can only happen if we got error on malloc of handle */
my_stpcpy(error_msg, ER(CR_OUT_OF_MEMORY));
return CR_OUT_OF_MEMORY;
}
void
mysql_set_local_infile_handler(MYSQL *mysql,
int (*local_infile_init)(void **, const char *,
void *),
int (*local_infile_read)(void *, char *, uint),
void (*local_infile_end)(void *),
int (*local_infile_error)(void *, char *, uint),
void *userdata)
{
mysql->options.local_infile_init= local_infile_init;
mysql->options.local_infile_read= local_infile_read;
mysql->options.local_infile_end= local_infile_end;
mysql->options.local_infile_error= local_infile_error;
mysql->options.local_infile_userdata = userdata;
}
void mysql_set_local_infile_default(MYSQL *mysql)
{
mysql->options.local_infile_init= default_local_infile_init;
mysql->options.local_infile_read= default_local_infile_read;
mysql->options.local_infile_end= default_local_infile_end;
mysql->options.local_infile_error= default_local_infile_error;
}
/**************************************************************************
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, (ulong) strlen(query));
}
/**************************************************************************
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++];
}
/**************************************************************************
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(my_stpcpy(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(my_stpcpy(buff,"show tables"),buff+sizeof(buff),wild);
if (mysql_query(mysql,buff))
DBUG_RETURN(0);
DBUG_RETURN (mysql_store_result(mysql));
}
MYSQL_FIELD *cli_list_fields(MYSQL *mysql)
{
MYSQL_DATA *query;
MYSQL_FIELD *result;
MYSQL_TRACE_STAGE(mysql, WAIT_FOR_FIELD_DEF);
query= cli_read_rows(mysql,(MYSQL_FIELD*) 0,
protocol_41(mysql) ? 8 : 6);
MYSQL_TRACE_STAGE(mysql, READY_FOR_COMMAND);
if (!query)
return NULL;
mysql->field_count= (uint) query->rows;
result= unpack_fields(mysql, query->data,&mysql->field_alloc,
mysql->field_count, 1, mysql->server_capabilities);
free_rows(query);
return result;
}
/**************************************************************************
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_FIELD *fields;
char buff[258],*end;
DBUG_ENTER("mysql_list_fields");
DBUG_PRINT("enter",("table: '%s' wild: '%s'",table,wild ? wild : ""));
end=strmake(strmake(buff, table,128)+1,wild ? wild : "",128);
free_old_query(mysql);
if (simple_command(mysql, COM_FIELD_LIST, (uchar*) buff,
(ulong) (end-buff), 1) ||
!(fields= (*mysql->methods->list_fields)(mysql)))
DBUG_RETURN(NULL);
if (!(result = (MYSQL_RES *) my_malloc(PSI_NOT_INSTRUMENTED,
sizeof(MYSQL_RES),
MYF(MY_WME | MY_ZEROFILL))))
DBUG_RETURN(NULL);
result->methods= mysql->methods;
result->field_alloc=mysql->field_alloc;
mysql->fields=0;
result->field_count = mysql->field_count;
result->fields= fields;
result->eof=1;
DBUG_RETURN(result);
}
/* List all running processes (threads) in server */
MYSQL_RES * STDCALL
mysql_list_processes(MYSQL *mysql)
{
uint field_count;
uchar *pos;
DBUG_ENTER("mysql_list_processes");
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 (!(mysql->fields=cli_read_metadata(mysql, field_count, protocol_41(mysql) ? 7:5)))
DBUG_RETURN(NULL);
mysql->status=MYSQL_STATUS_GET_RESULT;
mysql->field_count=field_count;
DBUG_RETURN(mysql_store_result(mysql));
}
int STDCALL
mysql_shutdown(MYSQL *mysql, enum mysql_enum_shutdown_level shutdown_level)
{
DBUG_ENTER("mysql_shutdown");
if (mysql_get_server_version(mysql) < 50709)
{
uchar level[1];
level[0]= (uchar) shutdown_level;
DBUG_RETURN (simple_command(mysql, COM_SHUTDOWN, level, 1, 0));
}
DBUG_RETURN(mysql_real_query(mysql, C_STRING_WITH_LEN("shutdown")));
}
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, bits, 1, 0));
}
int STDCALL
mysql_kill(MYSQL *mysql,ulong pid)
{
uchar buff[4];
DBUG_ENTER("mysql_kill");
/*
Sanity check: if ulong is 64-bits, user can submit a PID here that
overflows our 32-bit parameter to the somewhat obsolete COM_PROCESS_KILL.
If this is the case, we'll flag an error here.
The SQL statement KILL CONNECTION is the safer option here.
There is an analog of this failsafe in the server as we might see old
libmysql connection to a new server as well as the other way around.
*/
if (pid & (~0xfffffffful))
DBUG_RETURN(CR_INVALID_CONN_HANDLE);
int4store(buff,pid);
DBUG_RETURN(simple_command(mysql,COM_PROCESS_KILL,buff,sizeof(buff),0));
}
int STDCALL
mysql_set_server_option(MYSQL *mysql, enum enum_mysql_set_option option)
{
uchar buff[2];
DBUG_ENTER("mysql_set_server_option");
int2store(buff, (uint) option);
DBUG_RETURN(simple_command(mysql, COM_SET_OPTION, buff, sizeof(buff), 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 *cli_read_statistics(MYSQL *mysql)
{
mysql->net.read_pos[mysql->packet_length]=0; /* End of stat string */
if (!mysql->net.read_pos[0])
{
set_mysql_error(mysql, CR_WRONG_HOST_INFO, unknown_sqlstate);
return mysql->net.last_error;
}
/*
After reading the single packet with reply to COM_STATISTICS
we are ready for new commands.
*/
MYSQL_TRACE_STAGE(mysql, READY_FOR_COMMAND);
return (char*) mysql->net.read_pos;
}
const char * STDCALL
mysql_stat(MYSQL *mysql)
{
DBUG_ENTER("mysql_stat");
if (simple_command(mysql,COM_STATISTICS,0,0,0))
DBUG_RETURN(mysql->net.last_error);
DBUG_RETURN((*mysql->methods->read_statistics)(mysql));
}
int STDCALL
mysql_ping(MYSQL *mysql)
{
int res;
DBUG_ENTER("mysql_ping");
res= simple_command(mysql,COM_PING,0,0,0);
if (res == CR_SERVER_LOST && mysql->reconnect)
res= simple_command(mysql,COM_PING,0,0,0);
DBUG_RETURN(res);
}
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;
}
ulong STDCALL mysql_get_client_version(void)
{
return MYSQL_VERSION_ID;
}
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)