7fec73c549c5249feef63ae4dd194a3071aa3ab6
1 /**
2 * collectd - src/dbi.c
3 * Copyright (C) 2008-2013 Florian octo Forster
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Florian octo Forster <octo at collectd.org>
25 **/
27 #include "collectd.h"
28 #include "common.h"
29 #include "plugin.h"
30 #include "configfile.h"
31 #include "utils_db_query.h"
33 #include <dbi/dbi.h>
35 /*
36 * Data types
37 */
38 struct cdbi_driver_option_s /* {{{ */
39 {
40 char *key;
41 union
42 {
43 char *string;
44 int numeric;
45 } value;
46 _Bool is_numeric;
47 };
48 typedef struct cdbi_driver_option_s cdbi_driver_option_t; /* }}} */
50 struct cdbi_database_s /* {{{ */
51 {
52 char *name;
53 char *select_db;
55 char *driver;
56 char *host;
57 cdbi_driver_option_t *driver_options;
58 size_t driver_options_num;
60 udb_query_preparation_area_t **q_prep_areas;
61 udb_query_t **queries;
62 size_t queries_num;
64 dbi_conn connection;
65 };
66 typedef struct cdbi_database_s cdbi_database_t; /* }}} */
68 /*
69 * Global variables
70 */
71 static udb_query_t **queries = NULL;
72 static size_t queries_num = 0;
73 static cdbi_database_t **databases = NULL;
74 static size_t databases_num = 0;
76 static int cdbi_read_database (user_data_t *ud);
78 /*
79 * Functions
80 */
81 static const char *cdbi_strerror (dbi_conn conn, /* {{{ */
82 char *buffer, size_t buffer_size)
83 {
84 const char *msg;
85 int status;
87 if (conn == NULL)
88 {
89 sstrncpy (buffer, "connection is NULL", buffer_size);
90 return (buffer);
91 }
93 msg = NULL;
94 status = dbi_conn_error (conn, &msg);
95 if ((status >= 0) && (msg != NULL))
96 ssnprintf (buffer, buffer_size, "%s (status %i)", msg, status);
97 else
98 ssnprintf (buffer, buffer_size, "dbi_conn_error failed with status %i",
99 status);
101 return (buffer);
102 } /* }}} const char *cdbi_conn_error */
104 static int cdbi_result_get_field (dbi_result res, /* {{{ */
105 unsigned int index, char *buffer, size_t buffer_size)
106 {
107 unsigned short src_type;
109 src_type = dbi_result_get_field_type_idx (res, index);
110 if (src_type == DBI_TYPE_ERROR)
111 {
112 ERROR ("dbi plugin: cdbi_result_get: "
113 "dbi_result_get_field_type_idx failed.");
114 return (-1);
115 }
117 if (src_type == DBI_TYPE_INTEGER)
118 {
119 long long value;
121 value = dbi_result_get_longlong_idx (res, index);
122 ssnprintf (buffer, buffer_size, "%lli", value);
123 }
124 else if (src_type == DBI_TYPE_DECIMAL)
125 {
126 double value;
128 value = dbi_result_get_double_idx (res, index);
129 ssnprintf (buffer, buffer_size, "%63.15g", value);
130 }
131 else if (src_type == DBI_TYPE_STRING)
132 {
133 const char *value;
135 value = dbi_result_get_string_idx (res, index);
136 if (value == NULL)
137 sstrncpy (buffer, "", buffer_size);
138 else if (strcmp ("ERROR", value) == 0)
139 return (-1);
140 else
141 sstrncpy (buffer, value, buffer_size);
142 }
143 /* DBI_TYPE_BINARY */
144 /* DBI_TYPE_DATETIME */
145 else
146 {
147 const char *field_name;
149 field_name = dbi_result_get_field_name (res, index);
150 if (field_name == NULL)
151 field_name = "<unknown>";
153 ERROR ("dbi plugin: Column `%s': Don't know how to handle "
154 "source type %hu.",
155 field_name, src_type);
156 return (-1);
157 }
159 return (0);
160 } /* }}} int cdbi_result_get_field */
162 static void cdbi_database_free (cdbi_database_t *db) /* {{{ */
163 {
164 size_t i;
166 if (db == NULL)
167 return;
169 sfree (db->name);
170 sfree (db->driver);
172 for (i = 0; i < db->driver_options_num; i++)
173 {
174 sfree (db->driver_options[i].key);
175 if (!db->driver_options[i].is_numeric)
176 sfree (db->driver_options[i].value.string);
177 }
178 sfree (db->driver_options);
180 if (db->q_prep_areas)
181 for (i = 0; i < db->queries_num; ++i)
182 udb_query_delete_preparation_area (db->q_prep_areas[i]);
183 free (db->q_prep_areas);
185 sfree (db);
186 } /* }}} void cdbi_database_free */
188 /* Configuration handling functions {{{
189 *
190 * <Plugin dbi>
191 * <Query "plugin_instance0">
192 * Statement "SELECT name, value FROM table"
193 * <Result>
194 * Type "gauge"
195 * InstancesFrom "name"
196 * ValuesFrom "value"
197 * </Result>
198 * ...
199 * </Query>
200 *
201 * <Database "plugin_instance1">
202 * Driver "mysql"
203 * DriverOption "hostname" "localhost"
204 * ...
205 * Query "plugin_instance0"
206 * </Database>
207 * </Plugin>
208 */
210 static int cdbi_config_add_database_driver_option (cdbi_database_t *db, /* {{{ */
211 oconfig_item_t *ci)
212 {
213 cdbi_driver_option_t *option;
215 if ((ci->values_num != 2)
216 || (ci->values[0].type != OCONFIG_TYPE_STRING)
217 || ((ci->values[1].type != OCONFIG_TYPE_STRING)
218 && (ci->values[1].type != OCONFIG_TYPE_NUMBER)))
219 {
220 WARNING ("dbi plugin: The `DriverOption' config option "
221 "needs exactly two arguments.");
222 return (-1);
223 }
225 option = (cdbi_driver_option_t *) realloc (db->driver_options,
226 sizeof (*option) * (db->driver_options_num + 1));
227 if (option == NULL)
228 {
229 ERROR ("dbi plugin: realloc failed");
230 return (-1);
231 }
233 db->driver_options = option;
234 option = db->driver_options + db->driver_options_num;
235 memset (option, 0, sizeof (*option));
237 option->key = strdup (ci->values[0].value.string);
238 if (option->key == NULL)
239 {
240 ERROR ("dbi plugin: strdup failed.");
241 return (-1);
242 }
244 if (ci->values[1].type == OCONFIG_TYPE_STRING)
245 {
246 option->value.string = strdup (ci->values[1].value.string);
247 if (option->value.string == NULL)
248 {
249 ERROR ("dbi plugin: strdup failed.");
250 sfree (option->key);
251 return (-1);
252 }
253 }
254 else
255 {
256 assert (ci->values[1].type == OCONFIG_TYPE_NUMBER);
257 option->value.numeric = (int) (ci->values[1].value.number + .5);
258 option->is_numeric = 1;
259 }
261 db->driver_options_num++;
262 return (0);
263 } /* }}} int cdbi_config_add_database_driver_option */
265 static int cdbi_config_add_database (oconfig_item_t *ci) /* {{{ */
266 {
267 cdbi_database_t *db;
268 int status;
269 int i;
271 if ((ci->values_num != 1)
272 || (ci->values[0].type != OCONFIG_TYPE_STRING))
273 {
274 WARNING ("dbi plugin: The `Database' block "
275 "needs exactly one string argument.");
276 return (-1);
277 }
279 db = (cdbi_database_t *) malloc (sizeof (*db));
280 if (db == NULL)
281 {
282 ERROR ("dbi plugin: malloc failed.");
283 return (-1);
284 }
285 memset (db, 0, sizeof (*db));
287 status = cf_util_get_string (ci, &db->name);
288 if (status != 0)
289 {
290 sfree (db);
291 return (status);
292 }
294 /* Fill the `cdbi_database_t' structure.. */
295 for (i = 0; i < ci->children_num; i++)
296 {
297 oconfig_item_t *child = ci->children + i;
299 if (strcasecmp ("Driver", child->key) == 0)
300 status = cf_util_get_string (child, &db->driver);
301 else if (strcasecmp ("DriverOption", child->key) == 0)
302 status = cdbi_config_add_database_driver_option (db, child);
303 else if (strcasecmp ("SelectDB", child->key) == 0)
304 status = cf_util_get_string (child, &db->select_db);
305 else if (strcasecmp ("Query", child->key) == 0)
306 status = udb_query_pick_from_list (child, queries, queries_num,
307 &db->queries, &db->queries_num);
308 else if (strcasecmp ("Host", child->key) == 0)
309 status = cf_util_get_string (child, &db->host);
310 else
311 {
312 WARNING ("dbi plugin: Option `%s' not allowed here.", child->key);
313 status = -1;
314 }
316 if (status != 0)
317 break;
318 }
320 /* Check that all necessary options have been given. */
321 while (status == 0)
322 {
323 if (db->driver == NULL)
324 {
325 WARNING ("dbi plugin: `Driver' not given for database `%s'", db->name);
326 status = -1;
327 }
328 if (db->driver_options_num == 0)
329 {
330 WARNING ("dbi plugin: No `DriverOption' given for database `%s'. "
331 "This will likely not work.", db->name);
332 }
334 break;
335 } /* while (status == 0) */
337 while ((status == 0) && (db->queries_num > 0))
338 {
339 db->q_prep_areas = (udb_query_preparation_area_t **) calloc (
340 db->queries_num, sizeof (*db->q_prep_areas));
342 if (db->q_prep_areas == NULL)
343 {
344 WARNING ("dbi plugin: malloc failed");
345 status = -1;
346 break;
347 }
349 for (i = 0; i < db->queries_num; ++i)
350 {
351 db->q_prep_areas[i]
352 = udb_query_allocate_preparation_area (db->queries[i]);
354 if (db->q_prep_areas[i] == NULL)
355 {
356 WARNING ("dbi plugin: udb_query_allocate_preparation_area failed");
357 status = -1;
358 break;
359 }
360 }
362 break;
363 }
365 /* If all went well, add this database to the global list of databases. */
366 if (status == 0)
367 {
368 cdbi_database_t **temp;
370 temp = (cdbi_database_t **) realloc (databases,
371 sizeof (*databases) * (databases_num + 1));
372 if (temp == NULL)
373 {
374 ERROR ("dbi plugin: realloc failed");
375 status = -1;
376 }
377 else
378 {
379 user_data_t ud;
380 char *name = NULL;
382 databases = temp;
383 databases[databases_num] = db;
384 databases_num++;
386 memset (&ud, 0, sizeof (ud));
387 ud.data = (void *) db;
388 ud.free_func = NULL;
389 name = ssnprintf_alloc("dbi:%s", db->name);
391 plugin_register_complex_read (/* group = */ NULL,
392 /* name = */ name ? name : db->name,
393 /* callback = */ cdbi_read_database,
394 /* interval = */ NULL,
395 /* user_data = */ &ud);
396 free (name);
397 }
398 }
400 if (status != 0)
401 {
402 cdbi_database_free (db);
403 return (-1);
404 }
406 return (0);
407 } /* }}} int cdbi_config_add_database */
409 static int cdbi_config (oconfig_item_t *ci) /* {{{ */
410 {
411 int i;
413 for (i = 0; i < ci->children_num; i++)
414 {
415 oconfig_item_t *child = ci->children + i;
416 if (strcasecmp ("Query", child->key) == 0)
417 udb_query_create (&queries, &queries_num, child,
418 /* callback = */ NULL);
419 else if (strcasecmp ("Database", child->key) == 0)
420 cdbi_config_add_database (child);
421 else
422 {
423 WARNING ("dbi plugin: Ignoring unknown config option `%s'.", child->key);
424 }
425 } /* for (ci->children) */
427 return (0);
428 } /* }}} int cdbi_config */
430 /* }}} End of configuration handling functions */
432 static int cdbi_init (void) /* {{{ */
433 {
434 static int did_init = 0;
435 int status;
437 if (did_init != 0)
438 return (0);
440 if (queries_num == 0)
441 {
442 ERROR ("dbi plugin: No <Query> blocks have been found. Without them, "
443 "this plugin can't do anything useful, so we will returns an error.");
444 return (-1);
445 }
447 if (databases_num == 0)
448 {
449 ERROR ("dbi plugin: No <Database> blocks have been found. Without them, "
450 "this plugin can't do anything useful, so we will returns an error.");
451 return (-1);
452 }
454 status = dbi_initialize (NULL);
455 if (status < 0)
456 {
457 ERROR ("dbi plugin: cdbi_init: dbi_initialize failed with status %i.",
458 status);
459 return (-1);
460 }
461 else if (status == 0)
462 {
463 ERROR ("dbi plugin: `dbi_initialize' could not load any drivers. Please "
464 "install at least one `DBD' or check your installation.");
465 return (-1);
466 }
467 DEBUG ("dbi plugin: cdbi_init: dbi_initialize reports %i driver%s.",
468 status, (status == 1) ? "" : "s");
470 return (0);
471 } /* }}} int cdbi_init */
473 static int cdbi_read_database_query (cdbi_database_t *db, /* {{{ */
474 udb_query_t *q, udb_query_preparation_area_t *prep_area)
475 {
476 const char *statement;
477 dbi_result res;
478 size_t column_num;
479 char **column_names;
480 char **column_values;
481 int status;
482 size_t i;
484 /* Macro that cleans up dynamically allocated memory and returns the
485 * specified status. */
486 #define BAIL_OUT(status) \
487 if (column_names != NULL) { sfree (column_names[0]); sfree (column_names); } \
488 if (column_values != NULL) { sfree (column_values[0]); sfree (column_values); } \
489 if (res != NULL) { dbi_result_free (res); res = NULL; } \
490 return (status)
492 column_names = NULL;
493 column_values = NULL;
494 res = NULL;
496 statement = udb_query_get_statement (q);
497 assert (statement != NULL);
499 res = dbi_conn_query (db->connection, statement);
500 if (res == NULL)
501 {
502 char errbuf[1024];
503 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
504 "dbi_conn_query failed: %s",
505 db->name, udb_query_get_name (q),
506 cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
507 BAIL_OUT (-1);
508 }
509 else /* Get the number of columns */
510 {
511 unsigned int db_status;
513 db_status = dbi_result_get_numfields (res);
514 if (db_status == DBI_FIELD_ERROR)
515 {
516 char errbuf[1024];
517 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
518 "dbi_result_get_numfields failed: %s",
519 db->name, udb_query_get_name (q),
520 cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
521 BAIL_OUT (-1);
522 }
524 column_num = (size_t) db_status;
525 DEBUG ("cdbi_read_database_query (%s, %s): There are %zu columns.",
526 db->name, udb_query_get_name (q), column_num);
527 }
529 /* Allocate `column_names' and `column_values'. {{{ */
530 column_names = (char **) calloc (column_num, sizeof (char *));
531 if (column_names == NULL)
532 {
533 ERROR ("dbi plugin: malloc failed.");
534 BAIL_OUT (-1);
535 }
537 column_names[0] = (char *) calloc (column_num,
538 DATA_MAX_NAME_LEN * sizeof (char));
539 if (column_names[0] == NULL)
540 {
541 ERROR ("dbi plugin: malloc failed.");
542 BAIL_OUT (-1);
543 }
544 for (i = 1; i < column_num; i++)
545 column_names[i] = column_names[i - 1] + DATA_MAX_NAME_LEN;
547 column_values = (char **) calloc (column_num, sizeof (char *));
548 if (column_values == NULL)
549 {
550 ERROR ("dbi plugin: malloc failed.");
551 BAIL_OUT (-1);
552 }
554 column_values[0] = (char *) calloc (column_num,
555 DATA_MAX_NAME_LEN * sizeof (char));
556 if (column_values[0] == NULL)
557 {
558 ERROR ("dbi plugin: malloc failed.");
559 BAIL_OUT (-1);
560 }
561 for (i = 1; i < column_num; i++)
562 column_values[i] = column_values[i - 1] + DATA_MAX_NAME_LEN;
563 /* }}} */
565 /* Copy the field names to `column_names' */
566 for (i = 0; i < column_num; i++) /* {{{ */
567 {
568 const char *column_name;
570 column_name = dbi_result_get_field_name (res, (unsigned int) (i + 1));
571 if (column_name == NULL)
572 {
573 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
574 "Cannot retrieve name of field %zu.",
575 db->name, udb_query_get_name (q), i + 1);
576 BAIL_OUT (-1);
577 }
579 sstrncpy (column_names[i], column_name, DATA_MAX_NAME_LEN);
580 } /* }}} for (i = 0; i < column_num; i++) */
582 udb_query_prepare_result (q, prep_area, (db->host ? db->host : hostname_g),
583 /* plugin = */ "dbi", db->name,
584 column_names, column_num, /* interval = */ 0);
586 /* 0 = error; 1 = success; */
587 status = dbi_result_first_row (res); /* {{{ */
588 if (status != 1)
589 {
590 char errbuf[1024];
591 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
592 "dbi_result_first_row failed: %s. Maybe the statement didn't "
593 "return any rows?",
594 db->name, udb_query_get_name (q),
595 cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
596 udb_query_finish_result (q, prep_area);
597 BAIL_OUT (-1);
598 } /* }}} */
600 /* Iterate over all rows and call `udb_query_handle_result' with each list of
601 * values. */
602 while (42) /* {{{ */
603 {
604 status = 0;
605 /* Copy the value of the columns to `column_values' */
606 for (i = 0; i < column_num; i++) /* {{{ */
607 {
608 status = cdbi_result_get_field (res, (unsigned int) (i + 1),
609 column_values[i], DATA_MAX_NAME_LEN);
611 if (status != 0)
612 {
613 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
614 "cdbi_result_get_field (%zu) failed.",
615 db->name, udb_query_get_name (q), i + 1);
616 status = -1;
617 break;
618 }
619 } /* }}} for (i = 0; i < column_num; i++) */
621 /* If all values were copied successfully, call `udb_query_handle_result'
622 * to dispatch the row to the daemon. */
623 if (status == 0) /* {{{ */
624 {
625 status = udb_query_handle_result (q, prep_area, column_values);
626 if (status != 0)
627 {
628 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
629 "udb_query_handle_result failed.",
630 db->name, udb_query_get_name (q));
631 }
632 } /* }}} */
634 /* Get the next row from the database. */
635 status = dbi_result_next_row (res); /* {{{ */
636 if (status != 1)
637 {
638 if (dbi_conn_error (db->connection, NULL) != 0)
639 {
640 char errbuf[1024];
641 WARNING ("dbi plugin: cdbi_read_database_query (%s, %s): "
642 "dbi_result_next_row failed: %s.",
643 db->name, udb_query_get_name (q),
644 cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
645 }
646 break;
647 } /* }}} */
648 } /* }}} while (42) */
650 /* Tell the db query interface that we're done with this query. */
651 udb_query_finish_result (q, prep_area);
653 /* Clean up and return `status = 0' (success) */
654 BAIL_OUT (0);
655 #undef BAIL_OUT
656 } /* }}} int cdbi_read_database_query */
658 static int cdbi_connect_database (cdbi_database_t *db) /* {{{ */
659 {
660 dbi_driver driver;
661 dbi_conn connection;
662 size_t i;
663 int status;
665 if (db->connection != NULL)
666 {
667 status = dbi_conn_ping (db->connection);
668 if (status != 0) /* connection is alive */
669 return (0);
671 dbi_conn_close (db->connection);
672 db->connection = NULL;
673 }
675 driver = dbi_driver_open (db->driver);
676 if (driver == NULL)
677 {
678 ERROR ("dbi plugin: cdbi_connect_database: dbi_driver_open (%s) failed.",
679 db->driver);
680 INFO ("dbi plugin: Maybe the driver isn't installed? "
681 "Known drivers are:");
682 for (driver = dbi_driver_list (NULL);
683 driver != NULL;
684 driver = dbi_driver_list (driver))
685 {
686 INFO ("dbi plugin: * %s", dbi_driver_get_name (driver));
687 }
688 return (-1);
689 }
691 connection = dbi_conn_open (driver);
692 if (connection == NULL)
693 {
694 ERROR ("dbi plugin: cdbi_connect_database: dbi_conn_open (%s) failed.",
695 db->driver);
696 return (-1);
697 }
699 /* Set all the driver options. Because this is a very very very generic
700 * interface, the error handling is kind of long. If an invalid option is
701 * encountered, it will get a list of options understood by the driver and
702 * report that as `INFO'. This way, users hopefully don't have too much
703 * trouble finding out how to configure the plugin correctly.. */
704 for (i = 0; i < db->driver_options_num; i++)
705 {
706 if (db->driver_options[i].is_numeric)
707 {
708 status = dbi_conn_set_option_numeric (connection,
709 db->driver_options[i].key, db->driver_options[i].value.numeric);
710 if (status != 0)
711 {
712 char errbuf[1024];
713 ERROR ("dbi plugin: cdbi_connect_database (%s): "
714 "dbi_conn_set_option_numeric (\"%s\", %i) failed: %s.",
715 db->name,
716 db->driver_options[i].key, db->driver_options[i].value.numeric,
717 cdbi_strerror (connection, errbuf, sizeof (errbuf)));
718 }
719 }
720 else
721 {
722 status = dbi_conn_set_option (connection,
723 db->driver_options[i].key, db->driver_options[i].value.string);
724 if (status != 0)
725 {
726 char errbuf[1024];
727 ERROR ("dbi plugin: cdbi_connect_database (%s): "
728 "dbi_conn_set_option (\"%s\", \"%s\") failed: %s.",
729 db->name,
730 db->driver_options[i].key, db->driver_options[i].value.string,
731 cdbi_strerror (connection, errbuf, sizeof (errbuf)));
732 }
733 }
735 if (status != 0)
736 {
737 char const *opt;
739 INFO ("dbi plugin: This is a list of all options understood "
740 "by the `%s' driver:", db->driver);
741 for (opt = dbi_conn_get_option_list (connection, NULL);
742 opt != NULL;
743 opt = dbi_conn_get_option_list (connection, opt))
744 {
745 INFO ("dbi plugin: * %s", opt);
746 }
748 dbi_conn_close (connection);
749 return (-1);
750 }
751 } /* for (i = 0; i < db->driver_options_num; i++) */
753 status = dbi_conn_connect (connection);
754 if (status != 0)
755 {
756 char errbuf[1024];
757 ERROR ("dbi plugin: cdbi_connect_database (%s): "
758 "dbi_conn_connect failed: %s",
759 db->name, cdbi_strerror (connection, errbuf, sizeof (errbuf)));
760 dbi_conn_close (connection);
761 return (-1);
762 }
764 if (db->select_db != NULL)
765 {
766 status = dbi_conn_select_db (connection, db->select_db);
767 if (status != 0)
768 {
769 char errbuf[1024];
770 WARNING ("dbi plugin: cdbi_connect_database (%s): "
771 "dbi_conn_select_db (%s) failed: %s. Check the `SelectDB' option.",
772 db->name, db->select_db,
773 cdbi_strerror (connection, errbuf, sizeof (errbuf)));
774 dbi_conn_close (connection);
775 return (-1);
776 }
777 }
779 db->connection = connection;
780 return (0);
781 } /* }}} int cdbi_connect_database */
783 static int cdbi_read_database (user_data_t *ud) /* {{{ */
784 {
785 cdbi_database_t *db = (cdbi_database_t *) ud->data;
786 size_t i;
787 int success;
788 int status;
790 unsigned int db_version;
792 status = cdbi_connect_database (db);
793 if (status != 0)
794 return (status);
795 assert (db->connection != NULL);
797 db_version = dbi_conn_get_engine_version (db->connection);
798 /* TODO: Complain if `db_version == 0' */
800 success = 0;
801 for (i = 0; i < db->queries_num; i++)
802 {
803 /* Check if we know the database's version and if so, if this query applies
804 * to that version. */
805 if ((db_version != 0)
806 && (udb_query_check_version (db->queries[i], db_version) == 0))
807 continue;
809 status = cdbi_read_database_query (db,
810 db->queries[i], db->q_prep_areas[i]);
811 if (status == 0)
812 success++;
813 }
815 if (success == 0)
816 {
817 ERROR ("dbi plugin: All queries failed for database `%s'.", db->name);
818 return (-1);
819 }
821 return (0);
822 } /* }}} int cdbi_read_database */
824 static int cdbi_shutdown (void) /* {{{ */
825 {
826 size_t i;
828 for (i = 0; i < databases_num; i++)
829 {
830 if (databases[i]->connection != NULL)
831 {
832 dbi_conn_close (databases[i]->connection);
833 databases[i]->connection = NULL;
834 }
835 cdbi_database_free (databases[i]);
836 }
837 sfree (databases);
838 databases_num = 0;
840 udb_query_free (queries, queries_num);
841 queries = NULL;
842 queries_num = 0;
844 return (0);
845 } /* }}} int cdbi_shutdown */
847 void module_register (void) /* {{{ */
848 {
849 plugin_register_complex_config ("dbi", cdbi_config);
850 plugin_register_init ("dbi", cdbi_init);
851 plugin_register_shutdown ("dbi", cdbi_shutdown);
852 } /* }}} void module_register */
854 /*
855 * vim: shiftwidth=2 softtabstop=2 et fdm=marker
856 */