summaryrefslogtreecommitdiffstats
path: root/libmysqld/libmysqld.c
blob: d29126467e2b885109b274b3b6b25178c47d4cdf (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
/* Copyright (c) 2001, 2010, 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 02110-1335  USA */

#include <my_global.h>
#include <mysql.h>
#include <mysqld_error.h>
#include <my_pthread.h>
#include <my_sys.h>
#include <mysys_err.h>
#include <m_string.h>
#include <m_ctype.h>
#include "errmsg.h"
#include <violite.h>
#include <sys/stat.h>
#include <signal.h>
#include <time.h>
#include <sql_common.h>
#include "embedded_priv.h"
#include "client_settings.h"
#ifdef	 HAVE_PWD_H
#include <pwd.h>
#endif
#if !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
#ifndef INADDR_NONE
#define INADDR_NONE	-1
#endif

extern ulong net_buffer_length;
extern ulong max_allowed_packet;

#if defined(__WIN__)
#define ERRNO WSAGetLastError()
#define perror(A)
#else
#include <errno.h>
#define ERRNO errno
#define SOCKET_ERROR -1
#define closesocket(A) close(A)
#endif

#ifdef HAVE_GETPWUID
struct passwd *getpwuid(uid_t);
char* getlogin(void);
#endif

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

int mysql_init_character_set(MYSQL *mysql);

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];

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

  /* 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 (mysql->options.protocol == UINT_MAX32)
      goto error;
  }

  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 !defined(DONT_USE_MYSQL_PWD)
    if (!passwd)
      passwd=getenv("MYSQL_PWD");		/* get it from environment */
#endif
  }
  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(PSI_NOT_INSTRUMENTED, 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(PSI_NOT_INSTRUMENTED, 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: %p", 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);
}