1 /* Copyright (c) 2001, 2018, Oracle and/or its affiliates. All rights reserved.
2
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License, version 2.0,
5 as published by the Free Software Foundation.
6
7 This program is also distributed with certain software (including
8 but not limited to OpenSSL) that is licensed under separate terms,
9 as designated in a particular file or component or in included license
10 documentation. The authors of MySQL hereby grant you an additional
11 permission to link the program and your derivative works with the
12 separately licensed software that they have included with MySQL.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License, version 2.0, for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
22
23 #include <my_global.h>
24 #include <mysql.h>
25 #include <mysqld_error.h>
26 #include <my_pthread.h>
27 #include <my_sys.h>
28 #include <mysys_err.h>
29 #include <m_string.h>
30 #include <m_ctype.h>
31 #include "errmsg.h"
32 #include <violite.h>
33 #include <sys/stat.h>
34 #include <signal.h>
35 #include <time.h>
36 #include <sql_common.h>
37 #include "embedded_priv.h"
38 #include "client_settings.h"
39 #ifdef HAVE_PWD_H
40 #include <pwd.h>
41 #endif
42 #if !defined(__WIN__)
43 #ifdef HAVE_SELECT_H
44 # include <select.h>
45 #endif
46 #ifdef HAVE_SYS_SELECT_H
47 #include <sys/select.h>
48 #endif
49 #endif
50 #ifdef HAVE_SYS_UN_H
51 # include <sys/un.h>
52 #endif
53 #ifndef INADDR_NONE
54 #define INADDR_NONE -1
55 #endif
56
57 extern ulong net_buffer_length;
58 extern ulong max_allowed_packet;
59
60 #if defined(__WIN__)
61 #define ERRNO WSAGetLastError()
62 #define perror(A)
63 #else
64 #include <errno.h>
65 #define ERRNO errno
66 #define SOCKET_ERROR -1
67 #define closesocket(A) close(A)
68 #endif
69
70 #ifdef HAVE_GETPWUID
71 struct passwd *getpwuid(uid_t);
72 char* getlogin(void);
73 #endif
74
75 #ifdef __WIN__
is_NT(void)76 static my_bool is_NT(void)
77 {
78 char *os=getenv("OS");
79 return (os && !strcmp(os, "Windows_NT")) ? 1 : 0;
80 }
81 #endif
82
83
84 int mysql_init_character_set(MYSQL *mysql);
85
86 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)87 mysql_real_connect(MYSQL *mysql,const char *host, const char *user,
88 const char *passwd, const char *db,
89 uint port, const char *unix_socket,ulong client_flag)
90 {
91 char name_buff[USERNAME_LENGTH + 1];
92
93 DBUG_ENTER("mysql_real_connect");
94 DBUG_PRINT("enter",("host: %s db: %s user: %s (libmysqld)",
95 host ? host : "(Null)",
96 db ? db : "(Null)",
97 user ? user : "(Null)"));
98
99 /* Test whether we're already connected */
100 if (mysql->server_version)
101 {
102 set_mysql_error(mysql, CR_ALREADY_CONNECTED, unknown_sqlstate);
103 DBUG_RETURN(0);
104 }
105
106 if (!host || !host[0])
107 host= mysql->options.host;
108
109 if (mysql->options.methods_to_use == MYSQL_OPT_USE_REMOTE_CONNECTION ||
110 (mysql->options.methods_to_use == MYSQL_OPT_GUESS_CONNECTION &&
111 host && *host && strcmp(host,LOCAL_HOST)))
112 DBUG_RETURN(cli_mysql_real_connect(mysql, host, user,
113 passwd, db, port,
114 unix_socket, client_flag));
115
116 mysql->methods= &embedded_methods;
117
118 /* use default options */
119 if (mysql->options.my_cnf_file || mysql->options.my_cnf_group)
120 {
121 mysql_read_default_options(&mysql->options,
122 (mysql->options.my_cnf_file ?
123 mysql->options.my_cnf_file : "my"),
124 mysql->options.my_cnf_group);
125 my_free(mysql->options.my_cnf_file);
126 my_free(mysql->options.my_cnf_group);
127 mysql->options.my_cnf_file=mysql->options.my_cnf_group=0;
128 }
129
130 if (!db || !db[0])
131 db=mysql->options.db;
132
133 if (!user || !user[0])
134 user=mysql->options.user;
135
136 #ifndef NO_EMBEDDED_ACCESS_CHECKS
137 if (!passwd)
138 {
139 passwd=mysql->options.password;
140 #if !defined(DONT_USE_MYSQL_PWD)
141 if (!passwd)
142 passwd=getenv("MYSQL_PWD"); /* get it from environment */
143 #endif
144 }
145 mysql->passwd= passwd ? my_strdup(passwd,MYF(0)) : NULL;
146 #endif /*!NO_EMBEDDED_ACCESS_CHECKS*/
147 if (!user || !user[0])
148 {
149 read_user_name(name_buff);
150 if (name_buff[0])
151 user= name_buff;
152 }
153
154 if (!user)
155 user= "";
156 /*
157 We need to alloc some space for mysql->info but don't want to
158 put extra 'my_free's in mysql_close.
159 So we alloc it with the 'user' string to be freed at once
160 */
161 mysql->user= my_strdup(user, MYF(0));
162
163 port=0;
164 unix_socket=0;
165
166 client_flag|=mysql->options.client_flag;
167 /* Send client information for access check */
168 client_flag|=CLIENT_CAPABILITIES;
169 if (client_flag & CLIENT_MULTI_STATEMENTS)
170 client_flag|= CLIENT_MULTI_RESULTS;
171 /*
172 no compression in embedded as we don't send any data,
173 and no pluggable auth, as we cannot do a client-server dialog
174 */
175 client_flag&= ~(CLIENT_COMPRESS | CLIENT_PLUGIN_AUTH);
176 if (db)
177 client_flag|=CLIENT_CONNECT_WITH_DB;
178
179 if (embedded_ssl_check(mysql))
180 goto error;
181
182 mysql->info_buffer= my_malloc(MYSQL_ERRMSG_SIZE, MYF(0));
183 mysql->thd= create_embedded_thd(client_flag);
184
185 init_embedded_mysql(mysql, client_flag);
186
187 if (mysql_init_character_set(mysql))
188 goto error;
189
190 if (check_embedded_connection(mysql, db))
191 goto error;
192
193 mysql->server_status= SERVER_STATUS_AUTOCOMMIT;
194
195 if (mysql->options.init_commands)
196 {
197 DYNAMIC_ARRAY *init_commands= mysql->options.init_commands;
198 char **ptr= (char**)init_commands->buffer;
199 char **end= ptr + init_commands->elements;
200
201 for (; ptr<end; ptr++)
202 {
203 MYSQL_RES *res;
204 if (mysql_query(mysql,*ptr))
205 goto error;
206 if (mysql->fields)
207 {
208 if (!(res= (*mysql->methods->use_result)(mysql)))
209 goto error;
210 mysql_free_result(res);
211 }
212 }
213 }
214
215 DBUG_PRINT("exit",("Mysql handler: 0x%lx", (long) mysql));
216 DBUG_RETURN(mysql);
217
218 error:
219 DBUG_PRINT("error",("message: %u (%s)",
220 mysql->net.last_errno,
221 mysql->net.last_error));
222 {
223 /* Free alloced memory */
224 my_bool free_me=mysql->free_me;
225 free_old_query(mysql);
226 mysql->free_me=0;
227 mysql_close(mysql);
228 mysql->free_me=free_me;
229 }
230 DBUG_RETURN(0);
231 }
232
233