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,ulong client_flag)
{
char name_buff[USERNAME_LENGTH + 1];
DBUG_ENTER("mysql_real_connect");
DBUG_PRINT("enter",("host: %s db: %s user: %s (libmysqld)",
host ? host : "(Null)",
db ? db : "(Null)",
user ? user : "******"));
/* Test whether we're already connected */
if (mysql->server_version)
{
set_mysql_error(mysql, CR_ALREADY_CONNECTED, unknown_sqlstate);
DBUG_RETURN(0);
}
if (!host || !host[0])
host= mysql->options.host;
if (mysql->options.methods_to_use == MYSQL_OPT_USE_REMOTE_CONNECTION ||
(mysql->options.methods_to_use == MYSQL_OPT_GUESS_CONNECTION &&
host && *host && strcmp(host,LOCAL_HOST)))
DBUG_RETURN(cli_mysql_real_connect(mysql, host, user,
passwd, db, port,
unix_socket, client_flag));
mysql->methods= &embedded_methods;
/* 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);
my_free(mysql->options.my_cnf_group);
mysql->options.my_cnf_file=mysql->options.my_cnf_group=0;
}
if (!db || !db[0])
db=mysql->options.db;
if (!user || !user[0])
user=mysql->options.user;
#ifndef NO_EMBEDDED_ACCESS_CHECKS
if (!passwd)
{
passwd=mysql->options.password;
if (!passwd)
passwd=getenv("MYSQL_PWD"); /* get it from environment */
}
mysql->passwd= passwd ? my_strdup(passwd,MYF(0)) : NULL;
#endif /*!NO_EMBEDDED_ACCESS_CHECKS*/
if (!user || !user[0])
{
read_user_name(name_buff);
if (name_buff[0])
user= name_buff;
}
if (!user)
user= "";
/*
We need to alloc some space for mysql->info but don't want to
put extra 'my_free's in mysql_close.
So we alloc it with the 'user' string to be freed at once
*/
mysql->user= my_strdup(user, MYF(0));
port=0;
unix_socket=0;
client_flag|=mysql->options.client_flag;
/* Send client information for access check */
client_flag|=CLIENT_CAPABILITIES;
if (client_flag & CLIENT_MULTI_STATEMENTS)
client_flag|= CLIENT_MULTI_RESULTS;
/*
no compression in embedded as we don't send any data,
and no pluggable auth, as we cannot do a client-server dialog
*/
client_flag&= ~(CLIENT_COMPRESS | CLIENT_PLUGIN_AUTH);
if (db)
client_flag|=CLIENT_CONNECT_WITH_DB;
mysql->info_buffer= my_malloc(MYSQL_ERRMSG_SIZE, MYF(0));
mysql->thd= create_embedded_thd(client_flag);
init_embedded_mysql(mysql, client_flag);
if (mysql_init_character_set(mysql))
goto error;
if (check_embedded_connection(mysql, db))
goto error;
mysql->server_status= SERVER_STATUS_AUTOCOMMIT;
if (mysql->options.init_commands)
{
DYNAMIC_ARRAY *init_commands= mysql->options.init_commands;
char **ptr= (char**)init_commands->buffer;
char **end= ptr + init_commands->elements;
for (; ptr<end; ptr++)
{
MYSQL_RES *res;
if (mysql_query(mysql,*ptr))
goto error;
if (mysql->fields)
{
if (!(res= (*mysql->methods->use_result)(mysql)))
goto error;
mysql_free_result(res);
}
}
}
DBUG_PRINT("exit",("Mysql handler: 0x%lx", (long) mysql));
DBUG_RETURN(mysql);
error:
DBUG_PRINT("error",("message: %u (%s)",
mysql->net.last_errno,
mysql->net.last_error));
{
/* Free alloced memory */
my_bool free_me=mysql->free_me;
free_old_query(mysql);
mysql->free_me=0;
mysql_close(mysql);
mysql->free_me=free_me;
}
DBUG_RETURN(0);
}
static void end_server(MYSQL *mysql)
{
DBUG_ENTER("end_server");
free_old_query(mysql);
DBUG_VOID_RETURN;
}