aboutsummaryrefslogtreecommitdiff
path: root/src/mysql.c
blob: 1310212a82237890fe50e12c8da1d58352364a6e (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
229
230
231
232
233
234
/* This file is part of Gamma.
   Copyright (C) 2002, 2004, 2005, 2010 Sergey Poznyakoff

   Gamma 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 3, or (at your option)
   any later version.

   Gamma 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 Gamma.  If not, see <http://www.gnu.org/licenses/>. */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include <guile-sql.h>
#include <mysql/mysql.h>

static SCM
s_mysql_mark(struct sql_connect *conn)
{
	return SCM_BOOL_F;
}

static scm_sizet
s_mysql_free(struct sql_connect *conn)
{
	MYSQL *mysql = (MYSQL*) conn->data;
	if (!mysql)
		return 0;
	mysql_close(mysql);
	return sizeof(MYSQL);
}

static SCM
s_mysql_connect (SCM parmlist, const char *func_name)
{
	char *hostname = NULL;
	int port = 0;
	char *dbname = NULL;
	char *user = NULL;
	char *pass = NULL;
	char *socket_path = NULL;
	char *ssl_cert = NULL;
	char *config_file = NULL;
	char *config_group = NULL;
	struct gamma_parmdcl dcltab[] = {
		{ "iface",        NULL,          NULL },
		{ "host",         &hostname,     gamma_cvt_string },
		{ "socket",       &socket_path,  gamma_cvt_string },
		{ "port",         &port,         gamma_cvt_int },
		{ "db",           &dbname,       gamma_cvt_string },
		{ "user",         &user,         gamma_cvt_string },
		{ "pass",         &pass,         gamma_cvt_string },
		{ "ssl-cert",     &ssl_cert,     gamma_cvt_string },
		{ "config-file",  &config_file,  gamma_cvt_string },
		{ "config-group", &config_group, gamma_cvt_string },
		{ NULL }
	};

	MYSQL *mysql, *mp;
	SCM smob;
	struct sql_connect *conn;
	
	gamma_parmlist_parse (parmlist, dcltab, 0, func_name);
	
	mysql = mysql_init(NULL);
	
	if (!mysql) 
		scm_error(gamma_sql_error,
			  func_name,
			  "~A",
			  scm_list_1(scm_from_locale_string("mysql_init() failed")),
			  SCM_BOOL_F);
	
	if (hostname && hostname[0] == '/') {
		socket_path = hostname;
		hostname = strdup ("localhost");
	}

	if (config_file) {
		mysql_options (mysql, MYSQL_READ_DEFAULT_FILE, config_file);
		free(config_file);
	}
	if (config_group) {
		mysql_options (mysql, MYSQL_READ_DEFAULT_GROUP, config_group);
		free(config_group);
	}
	if (ssl_cert) {
		mysql_ssl_set (mysql, NULL, NULL, ssl_cert, NULL, NULL);
		free(ssl_cert);
	}

	mp = mysql_real_connect(mysql, hostname,
				user, pass, dbname,
				port, socket_path,
				CLIENT_MULTI_RESULTS);
	free(socket_path);

	if (!mp) {
		SCM args, mdiag;
		
		free(hostname);
		free(user);
		free(pass);
		free(dbname);

		mdiag = scm_from_locale_string(mysql_error(mysql));
		args = scm_list_2(scm_from_uint(mysql_errno(mysql)),
				  mdiag);
		mysql_close(mysql);

		scm_error(gamma_sql_error, func_name,
			  "~A: ~A",
			  scm_list_2(scm_from_locale_string("Cannot connect to the database"), mdiag),
			  args);
	}
	
	smob = sql_connect_create("mysql");
	conn = (struct sql_connect *)SCM_CDR(smob);
	conn->hostname = hostname;
	conn->port = port;
	conn->username = user;
	conn->database = dbname;
	conn->data = mysql;
	return smob;
}

static void
flush_result(MYSQL *mysql)
{
	while (mysql_next_result(mysql) == 0) {
		MYSQL_RES *result = mysql_store_result(mysql);
		if (!result)
			break;
		if (mysql_field_count(mysql))
			while (mysql_fetch_row(result))
				;
		mysql_free_result(result);
	}
}

static SCM
s_mysql_query(struct sql_connect *conn, const char *query)
{
	MYSQL *mysql = conn->data;
	MYSQL_RES *result;
	SCM cell = SCM_EOL;
	
	if (mysql_query(mysql, query)) {
		SCM mdiag = scm_from_locale_string(mysql_error(mysql));

		scm_error(gamma_sql_error, "sql-query",
			  "~A: ~A",
			  scm_list_2(scm_from_locale_string("Error executing MySQL query"),
				     mdiag),
			  scm_list_2(scm_from_uint(mysql_errno(mysql)),
				     mdiag));
	}
	
	result = mysql_store_result(mysql);

	if (result) {
		int nfields = mysql_num_fields(result);
		int nrows = mysql_num_rows(result);
		int i, j;
		SCM row_head = SCM_EOL, row_tail = SCM_EOL;

		for (i = 0; i < nrows; i++) {
			SCM new_row;
			SCM head = SCM_EOL, tail = SCM_EOL;
			MYSQL_ROW row = mysql_fetch_row(result);

			if (!row)
				break;
			for (j = 0; j < nfields; j++) {
				SCM new_elt =
					scm_cons(row[j] ?
						 scm_from_locale_string(row[j]) :
						 SCM_BOOL_F,
						 SCM_EOL);
				if (head == SCM_EOL)
					head = new_elt;
				else
					SCM_SETCDR(tail, new_elt);
				tail = new_elt;
			}

			new_row = scm_cons(head, SCM_EOL);
			if (row_head == SCM_EOL) 
				row_head = new_row;
			else 
				SCM_SETCDR(row_tail, new_row);
			row_tail = new_row;
		}
		cell = row_head;
		mysql_free_result(result);
		flush_result(mysql);
	} else { /* should it have returned something? */ 
		if (mysql_field_count(mysql) == 0) {
			cell = scm_from_ulong(mysql_affected_rows(mysql));
		} else { /* mysql_store_result() should have returned data */
			scm_error(gamma_sql_error, "sql-query",
				  "~A",
				  scm_list_1(scm_from_locale_string("Query should have returned data")),
				  scm_list_2(scm_from_uint(mysql_errno(mysql)),
					     scm_from_locale_string(mysql_error(mysql))));
		}
	}
	return cell;
}

static void
s_mysql_close(struct sql_connect *conn)
{
	if (conn->data)
		mysql_close(conn->data);
	conn->data = NULL;
}

struct sql_iface mysql_iface = {
	"mysql",
	s_mysql_mark,
	s_mysql_free,
	s_mysql_connect,
	s_mysql_close,
	s_mysql_query,
};

Return to:

Send suggestions and report system problems to the System administrator.