1 /**
2 * collectd - src/dbi.c
3 * Copyright (C) 2008-2015 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"
29 #include "common.h"
30 #include "plugin.h"
31 #include "utils_db_query.h"
33 #include <dbi/dbi.h>
35 /* libdbi 0.9.0 introduced a new thread-safe interface and marked the old
36 * functions "deprecated". These macros convert the new functions to their old
37 * counterparts for backwards compatibility. */
38 #if !defined(LIBDBI_VERSION) || (LIBDBI_VERSION < 900)
39 # define HAVE_LEGACY_LIBDBI 1
40 # define dbi_initialize_r(a,inst) dbi_initialize(a)
41 # define dbi_shutdown_r(inst) dbi_shutdown()
42 # define dbi_set_verbosity_r(a,inst) dbi_set_verbosity(a)
43 # define dbi_driver_list_r(a,inst) dbi_driver_list(a)
44 # define dbi_driver_open_r(a,inst) dbi_driver_open(a)
45 #endif
47 /*
48 * Data types
49 */
50 struct cdbi_driver_option_s /* {{{ */
51 {
52 char *key;
53 union
54 {
55 char *string;
56 int numeric;
57 } value;
58 _Bool is_numeric;
59 };
60 typedef struct cdbi_driver_option_s cdbi_driver_option_t; /* }}} */
62 struct cdbi_database_s /* {{{ */
63 {
64 char *name;
65 char *select_db;
67 cdtime_t interval;
69 char *driver;
70 char *host;
71 cdbi_driver_option_t *driver_options;
72 size_t driver_options_num;
74 udb_query_preparation_area_t **q_prep_areas;
75 udb_query_t **queries;
76 size_t queries_num;
78 dbi_conn connection;
79 };
80 typedef struct cdbi_database_s cdbi_database_t; /* }}} */
82 /*
83 * Global variables
84 */
85 #if !defined(HAVE_LEGACY_LIBDBI) || !HAVE_LEGACY_LIBDBI
86 static dbi_inst dbi_instance = 0;
87 #endif
88 static udb_query_t **queries = NULL;
89 static size_t queries_num = 0;
90 static cdbi_database_t **databases = NULL;
91 static size_t databases_num = 0;
93 static int cdbi_read_database (user_data_t *ud);
95 /*
96 * Functions
97 */
98 static const char *cdbi_strerror (dbi_conn conn, /* {{{ */
99 char *buffer, size_t buffer_size)
100 {
101 const char *msg;
102 int status;
104 if (conn == NULL)
105 {
106 sstrncpy (buffer, "connection is NULL", buffer_size);
107 return (buffer);
108 }
110 msg = NULL;
111 status = dbi_conn_error (conn, &msg);
112 if ((status >= 0) && (msg != NULL))
113 ssnprintf (buffer, buffer_size, "%s (status %i)", msg, status);
114 else
115 ssnprintf (buffer, buffer_size, "dbi_conn_error failed with status %i",
116 status);
118 return (buffer);
119 } /* }}} const char *cdbi_conn_error */
121 static int cdbi_result_get_field (dbi_result res, /* {{{ */
122 unsigned int index, char *buffer, size_t buffer_size)
123 {
124 unsigned short src_type;
126 src_type = dbi_result_get_field_type_idx (res, index);
127 if (src_type == DBI_TYPE_ERROR)
128 {
129 ERROR ("dbi plugin: cdbi_result_get: "
130 "dbi_result_get_field_type_idx failed.");
131 return (-1);
132 }
134 if (src_type == DBI_TYPE_INTEGER)
135 {
136 long long value;
138 value = dbi_result_get_longlong_idx (res, index);
139 ssnprintf (buffer, buffer_size, "%lli", value);
140 }
141 else if (src_type == DBI_TYPE_DECIMAL)
142 {
143 double value;
145 value = dbi_result_get_double_idx (res, index);
146 ssnprintf (buffer, buffer_size, "%63.15g", value);
147 }
148 else if (src_type == DBI_TYPE_STRING)
149 {
150 const char *value;
152 value = dbi_result_get_string_idx (res, index);
153 if (value == NULL)
154 sstrncpy (buffer, "", buffer_size);
155 else if (strcmp ("ERROR", value) == 0)
156 return (-1);
157 else
158 sstrncpy (buffer, value, buffer_size);
159 }
160 /* DBI_TYPE_BINARY */
161 /* DBI_TYPE_DATETIME */
162 else
163 {
164 const char *field_name;
166 field_name = dbi_result_get_field_name (res, index);
167 if (field_name == NULL)
168 field_name = "<unknown>";
170 ERROR ("dbi plugin: Column `%s': Don't know how to handle "
171 "source type %hu.",
172 field_name, src_type);
173 return (-1);
174 }
176 return (0);
177 } /* }}} int cdbi_result_get_field */
179 static void cdbi_database_free (cdbi_database_t *db) /* {{{ */
180 {
181 if (db == NULL)
182 return;
184 sfree (db->name);
185 sfree (db->driver);
187 for (size_t i = 0; i < db->driver_options_num; i++)
188 {
189 sfree (db->driver_options[i].key);
190 if (!db->driver_options[i].is_numeric)
191 sfree (db->driver_options[i].value.string);
192 }
193 sfree (db->driver_options);
195 if (db->q_prep_areas)
196 for (size_t i = 0; i < db->queries_num; ++i)
197 udb_query_delete_preparation_area (db->q_prep_areas[i]);
198 free (db->q_prep_areas);
200 sfree (db);
201 } /* }}} void cdbi_database_free */
203 /* Configuration handling functions {{{
204 *
205 * <Plugin dbi>
206 * <Query "plugin_instance0">
207 * Statement "SELECT name, value FROM table"
208 * <Result>
209 * Type "gauge"
210 * InstancesFrom "name"
211 * ValuesFrom "value"
212 * </Result>
213 * ...
214 * </Query>
215 *
216 * <Database "plugin_instance1">
217 * Driver "mysql"
218 * Interval 120
219 * DriverOption "hostname" "localhost"
220 * ...
221 * Query "plugin_instance0"
222 * </Database>
223 * </Plugin>
224 */
226 static int cdbi_config_add_database_driver_option (cdbi_database_t *db, /* {{{ */
227 oconfig_item_t *ci)
228 {
229 cdbi_driver_option_t *option;
231 if ((ci->values_num != 2)
232 || (ci->values[0].type != OCONFIG_TYPE_STRING)
233 || ((ci->values[1].type != OCONFIG_TYPE_STRING)
234 && (ci->values[1].type != OCONFIG_TYPE_NUMBER)))
235 {
236 WARNING ("dbi plugin: The `DriverOption' config option "
237 "needs exactly two arguments.");
238 return (-1);
239 }
241 option = realloc (db->driver_options,
242 sizeof (*option) * (db->driver_options_num + 1));
243 if (option == NULL)
244 {
245 ERROR ("dbi plugin: realloc failed");
246 return (-1);
247 }
249 db->driver_options = option;
250 option = db->driver_options + db->driver_options_num;
251 memset (option, 0, sizeof (*option));
253 option->key = strdup (ci->values[0].value.string);
254 if (option->key == NULL)
255 {
256 ERROR ("dbi plugin: strdup failed.");
257 return (-1);
258 }
260 if (ci->values[1].type == OCONFIG_TYPE_STRING)
261 {
262 option->value.string = strdup (ci->values[1].value.string);
263 if (option->value.string == NULL)
264 {
265 ERROR ("dbi plugin: strdup failed.");
266 sfree (option->key);
267 return (-1);
268 }
269 }
270 else
271 {
272 assert (ci->values[1].type == OCONFIG_TYPE_NUMBER);
273 option->value.numeric = (int) (ci->values[1].value.number + .5);
274 option->is_numeric = 1;
275 }
277 db->driver_options_num++;
278 return (0);
279 } /* }}} int cdbi_config_add_database_driver_option */
281 static int cdbi_config_add_database (oconfig_item_t *ci) /* {{{ */
282 {
283 cdbi_database_t *db;
284 int status;
286 if ((ci->values_num != 1)
287 || (ci->values[0].type != OCONFIG_TYPE_STRING))
288 {
289 WARNING ("dbi plugin: The `Database' block "
290 "needs exactly one string argument.");
291 return (-1);
292 }
294 db = calloc (1, sizeof (*db));
295 if (db == NULL)
296 {
297 ERROR ("dbi plugin: calloc failed.");
298 return (-1);
299 }
301 status = cf_util_get_string (ci, &db->name);
302 if (status != 0)
303 {
304 sfree (db);
305 return (status);
306 }
308 /* Fill the `cdbi_database_t' structure.. */
309 for (int i = 0; i < ci->children_num; i++)
310 {
311 oconfig_item_t *child = ci->children + i;
313 if (strcasecmp ("Driver", child->key) == 0)
314 status = cf_util_get_string (child, &db->driver);
315 else if (strcasecmp ("DriverOption", child->key) == 0)
316 status = cdbi_config_add_database_driver_option (db, child);
317 else if (strcasecmp ("SelectDB", child->key) == 0)
318 status = cf_util_get_string (child, &db->select_db);
319 else if (strcasecmp ("Query", child->key) == 0)
320 status = udb_query_pick_from_list (child, queries, queries_num,
321 &db->queries, &db->queries_num);
322 else if (strcasecmp ("Host", child->key) == 0)
323 status = cf_util_get_string (child, &db->host);
324 else if (strcasecmp ("Interval", child->key) == 0)
325 status = cf_util_get_cdtime(child, &db->interval);
326 else
327 {
328 WARNING ("dbi plugin: Option `%s' not allowed here.", child->key);
329 status = -1;
330 }
332 if (status != 0)
333 break;
334 }
336 /* Check that all necessary options have been given. */
337 while (status == 0)
338 {
339 if (db->driver == NULL)
340 {
341 WARNING ("dbi plugin: `Driver' not given for database `%s'", db->name);
342 status = -1;
343 }
344 if (db->driver_options_num == 0)
345 {
346 WARNING ("dbi plugin: No `DriverOption' given for database `%s'. "
347 "This will likely not work.", db->name);
348 }
350 break;
351 } /* while (status == 0) */
353 while ((status == 0) && (db->queries_num > 0))
354 {
355 db->q_prep_areas = calloc (db->queries_num, sizeof (*db->q_prep_areas));
356 if (db->q_prep_areas == NULL)
357 {
358 WARNING ("dbi plugin: calloc failed");
359 status = -1;
360 break;
361 }
363 for (size_t i = 0; i < db->queries_num; ++i)
364 {
365 db->q_prep_areas[i]
366 = udb_query_allocate_preparation_area (db->queries[i]);
368 if (db->q_prep_areas[i] == NULL)
369 {
370 WARNING ("dbi plugin: udb_query_allocate_preparation_area failed");
371 status = -1;
372 break;
373 }
374 }
376 break;
377 }
379 /* If all went well, add this database to the global list of databases. */
380 if (status == 0)
381 {
382 cdbi_database_t **temp;
384 temp = realloc (databases,
385 sizeof (*databases) * (databases_num + 1));
386 if (temp == NULL)
387 {
388 ERROR ("dbi plugin: realloc failed");
389 status = -1;
390 }
391 else
392 {
393 databases = temp;
394 databases[databases_num] = db;
395 databases_num++;
397 char *name = ssnprintf_alloc("dbi:%s", db->name);
398 plugin_register_complex_read (/* group = */ NULL,
399 /* name = */ name ? name : db->name,
400 /* callback = */ cdbi_read_database,
401 /* interval = */ (db->interval > 0) ? db->interval : 0,
402 &(user_data_t) {
403 .data = db,
404 });
405 sfree (name);
406 }
407 }
409 if (status != 0)
410 {
411 cdbi_database_free (db);
412 return (-1);
413 }
415 return (0);
416 } /* }}} int cdbi_config_add_database */
418 static int cdbi_config (oconfig_item_t *ci) /* {{{ */
419 {
420 for (int i = 0; i < ci->children_num; i++)
421 {
422 oconfig_item_t *child = ci->children + i;
423 if (strcasecmp ("Query", child->key) == 0)
424 udb_query_create (&queries, &queries_num, child,
425 /* callback = */ NULL);
426 else if (strcasecmp ("Database", child->key) == 0)
427 cdbi_config_add_database (child);
428 else
429 {
430 WARNING ("dbi plugin: Ignoring unknown config option `%s'.", child->key);
431 }
432 } /* for (ci->children) */
434 return (0);
435 } /* }}} int cdbi_config */
437 /* }}} End of configuration handling functions */
439 static int cdbi_init (void) /* {{{ */
440 {
441 static int did_init = 0;
442 int status;
444 if (did_init != 0)
445 return (0);
447 if (queries_num == 0)
448 {
449 ERROR ("dbi plugin: No <Query> blocks have been found. Without them, "
450 "this plugin can't do anything useful, so we will return an error.");
451 return (-1);
452 }
454 if (databases_num == 0)
455 {
456 ERROR ("dbi plugin: No <Database> blocks have been found. Without them, "
457 "this plugin can't do anything useful, so we will return an error.");
458 return (-1);
459 }
461 status = dbi_initialize_r (/* driverdir = */ NULL, &dbi_instance);
462 if (status < 0)
463 {
464 ERROR ("dbi plugin: cdbi_init: dbi_initialize_r failed with status %i.",
465 status);
466 return (-1);
467 }
468 else if (status == 0)
469 {
470 ERROR ("dbi plugin: `dbi_initialize_r' could not load any drivers. Please "
471 "install at least one `DBD' or check your installation.");
472 return (-1);
473 }
474 DEBUG ("dbi plugin: cdbi_init: dbi_initialize_r reports %i driver%s.",
475 status, (status == 1) ? "" : "s");
477 return (0);
478 } /* }}} int cdbi_init */
480 static int cdbi_read_database_query (cdbi_database_t *db, /* {{{ */
481 udb_query_t *q, udb_query_preparation_area_t *prep_area)
482 {
483 const char *statement;
484 dbi_result res;
485 size_t column_num;
486 char **column_names;
487 char **column_values;
488 int status;
490 /* Macro that cleans up dynamically allocated memory and returns the
491 * specified status. */
492 #define BAIL_OUT(status) \
493 if (column_names != NULL) { sfree (column_names[0]); sfree (column_names); } \
494 if (column_values != NULL) { sfree (column_values[0]); sfree (column_values); } \
495 if (res != NULL) { dbi_result_free (res); res = NULL; } \
496 return (status)
498 column_names = NULL;
499 column_values = NULL;
501 statement = udb_query_get_statement (q);
502 assert (statement != NULL);
504 res = dbi_conn_query (db->connection, statement);
505 if (res == NULL)
506 {
507 char errbuf[1024];
508 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
509 "dbi_conn_query failed: %s",
510 db->name, udb_query_get_name (q),
511 cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
512 BAIL_OUT (-1);
513 }
514 else /* Get the number of columns */
515 {
516 unsigned int db_status;
518 db_status = dbi_result_get_numfields (res);
519 if (db_status == DBI_FIELD_ERROR)
520 {
521 char errbuf[1024];
522 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
523 "dbi_result_get_numfields failed: %s",
524 db->name, udb_query_get_name (q),
525 cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
526 BAIL_OUT (-1);
527 }
529 column_num = (size_t) db_status;
530 DEBUG ("cdbi_read_database_query (%s, %s): There are %zu columns.",
531 db->name, udb_query_get_name (q), column_num);
532 }
534 /* Allocate `column_names' and `column_values'. {{{ */
535 column_names = calloc (column_num, sizeof (*column_names));
536 if (column_names == NULL)
537 {
538 ERROR ("dbi plugin: calloc failed.");
539 BAIL_OUT (-1);
540 }
542 column_names[0] = calloc (column_num, DATA_MAX_NAME_LEN);
543 if (column_names[0] == NULL)
544 {
545 ERROR ("dbi plugin: calloc failed.");
546 BAIL_OUT (-1);
547 }
548 for (size_t i = 1; i < column_num; i++)
549 column_names[i] = column_names[i - 1] + DATA_MAX_NAME_LEN;
551 column_values = calloc (column_num, sizeof (*column_values));
552 if (column_values == NULL)
553 {
554 ERROR ("dbi plugin: calloc failed.");
555 BAIL_OUT (-1);
556 }
558 column_values[0] = calloc (column_num, DATA_MAX_NAME_LEN);
559 if (column_values[0] == NULL)
560 {
561 ERROR ("dbi plugin: calloc failed.");
562 BAIL_OUT (-1);
563 }
564 for (size_t i = 1; i < column_num; i++)
565 column_values[i] = column_values[i - 1] + DATA_MAX_NAME_LEN;
566 /* }}} */
568 /* Copy the field names to `column_names' */
569 for (size_t i = 0; i < column_num; i++) /* {{{ */
570 {
571 const char *column_name;
573 column_name = dbi_result_get_field_name (res, (unsigned int) (i + 1));
574 if (column_name == NULL)
575 {
576 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
577 "Cannot retrieve name of field %zu.",
578 db->name, udb_query_get_name (q), i + 1);
579 BAIL_OUT (-1);
580 }
582 sstrncpy (column_names[i], column_name, DATA_MAX_NAME_LEN);
583 } /* }}} for (i = 0; i < column_num; i++) */
585 udb_query_prepare_result (q, prep_area, (db->host ? db->host : hostname_g),
586 /* plugin = */ "dbi", db->name,
587 column_names, column_num, /* interval = */ (db->interval > 0) ? db->interval : 0);
589 /* 0 = error; 1 = success; */
590 status = dbi_result_first_row (res); /* {{{ */
591 if (status != 1)
592 {
593 char errbuf[1024];
594 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
595 "dbi_result_first_row failed: %s. Maybe the statement didn't "
596 "return any rows?",
597 db->name, udb_query_get_name (q),
598 cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
599 udb_query_finish_result (q, prep_area);
600 BAIL_OUT (-1);
601 } /* }}} */
603 /* Iterate over all rows and call `udb_query_handle_result' with each list of
604 * values. */
605 while (42) /* {{{ */
606 {
607 status = 0;
608 /* Copy the value of the columns to `column_values' */
609 for (size_t i = 0; i < column_num; i++) /* {{{ */
610 {
611 status = cdbi_result_get_field (res, (unsigned int) (i + 1),
612 column_values[i], DATA_MAX_NAME_LEN);
614 if (status != 0)
615 {
616 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
617 "cdbi_result_get_field (%zu) failed.",
618 db->name, udb_query_get_name (q), i + 1);
619 status = -1;
620 break;
621 }
622 } /* }}} for (i = 0; i < column_num; i++) */
624 /* If all values were copied successfully, call `udb_query_handle_result'
625 * to dispatch the row to the daemon. */
626 if (status == 0) /* {{{ */
627 {
628 status = udb_query_handle_result (q, prep_area, column_values);
629 if (status != 0)
630 {
631 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
632 "udb_query_handle_result failed.",
633 db->name, udb_query_get_name (q));
634 }
635 } /* }}} */
637 /* Get the next row from the database. */
638 status = dbi_result_next_row (res); /* {{{ */
639 if (status != 1)
640 {
641 if (dbi_conn_error (db->connection, NULL) != 0)
642 {
643 char errbuf[1024];
644 WARNING ("dbi plugin: cdbi_read_database_query (%s, %s): "
645 "dbi_result_next_row failed: %s.",
646 db->name, udb_query_get_name (q),
647 cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
648 }
649 break;
650 } /* }}} */
651 } /* }}} while (42) */
653 /* Tell the db query interface that we're done with this query. */
654 udb_query_finish_result (q, prep_area);
656 /* Clean up and return `status = 0' (success) */
657 BAIL_OUT (0);
658 #undef BAIL_OUT
659 } /* }}} int cdbi_read_database_query */
661 static int cdbi_connect_database (cdbi_database_t *db) /* {{{ */
662 {
663 dbi_driver driver;
664 dbi_conn connection;
665 int status;
667 if (db->connection != NULL)
668 {
669 status = dbi_conn_ping (db->connection);
670 if (status != 0) /* connection is alive */
671 return (0);
673 dbi_conn_close (db->connection);
674 db->connection = NULL;
675 }
677 driver = dbi_driver_open_r (db->driver, dbi_instance);
678 if (driver == NULL)
679 {
680 ERROR ("dbi plugin: cdbi_connect_database: dbi_driver_open_r (%s) failed.",
681 db->driver);
682 INFO ("dbi plugin: Maybe the driver isn't installed? "
683 "Known drivers are:");
684 for (driver = dbi_driver_list_r (NULL, dbi_instance);
685 driver != NULL;
686 driver = dbi_driver_list_r (driver, dbi_instance))
687 {
688 INFO ("dbi plugin: * %s", dbi_driver_get_name (driver));
689 }
690 return (-1);
691 }
693 connection = dbi_conn_open (driver);
694 if (connection == NULL)
695 {
696 ERROR ("dbi plugin: cdbi_connect_database: dbi_conn_open (%s) failed.",
697 db->driver);
698 return (-1);
699 }
701 /* Set all the driver options. Because this is a very very very generic
702 * interface, the error handling is kind of long. If an invalid option is
703 * encountered, it will get a list of options understood by the driver and
704 * report that as `INFO'. This way, users hopefully don't have too much
705 * trouble finding out how to configure the plugin correctly.. */
706 for (size_t i = 0; i < db->driver_options_num; i++)
707 {
708 if (db->driver_options[i].is_numeric)
709 {
710 status = dbi_conn_set_option_numeric (connection,
711 db->driver_options[i].key, db->driver_options[i].value.numeric);
712 if (status != 0)
713 {
714 char errbuf[1024];
715 ERROR ("dbi plugin: cdbi_connect_database (%s): "
716 "dbi_conn_set_option_numeric (\"%s\", %i) failed: %s.",
717 db->name,
718 db->driver_options[i].key, db->driver_options[i].value.numeric,
719 cdbi_strerror (connection, errbuf, sizeof (errbuf)));
720 }
721 }
722 else
723 {
724 status = dbi_conn_set_option (connection,
725 db->driver_options[i].key, db->driver_options[i].value.string);
726 if (status != 0)
727 {
728 char errbuf[1024];
729 ERROR ("dbi plugin: cdbi_connect_database (%s): "
730 "dbi_conn_set_option (\"%s\", \"%s\") failed: %s.",
731 db->name,
732 db->driver_options[i].key, db->driver_options[i].value.string,
733 cdbi_strerror (connection, errbuf, sizeof (errbuf)));
734 }
735 }
737 if (status != 0)
738 {
739 INFO ("dbi plugin: This is a list of all options understood "
740 "by the `%s' driver:", db->driver);
741 for (const char *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 int success;
787 int status;
789 unsigned int db_version;
791 status = cdbi_connect_database (db);
792 if (status != 0)
793 return (status);
794 assert (db->connection != NULL);
796 db_version = dbi_conn_get_engine_version (db->connection);
797 /* TODO: Complain if `db_version == 0' */
799 success = 0;
800 for (size_t i = 0; i < db->queries_num; i++)
801 {
802 /* Check if we know the database's version and if so, if this query applies
803 * to that version. */
804 if ((db_version != 0)
805 && (udb_query_check_version (db->queries[i], db_version) == 0))
806 continue;
808 status = cdbi_read_database_query (db,
809 db->queries[i], db->q_prep_areas[i]);
810 if (status == 0)
811 success++;
812 }
814 if (success == 0)
815 {
816 ERROR ("dbi plugin: All queries failed for database `%s'.", db->name);
817 return (-1);
818 }
820 return (0);
821 } /* }}} int cdbi_read_database */
823 static int cdbi_shutdown (void) /* {{{ */
824 {
825 for (size_t i = 0; i < databases_num; i++)
826 {
827 if (databases[i]->connection != NULL)
828 {
829 dbi_conn_close (databases[i]->connection);
830 databases[i]->connection = NULL;
831 }
832 cdbi_database_free (databases[i]);
833 }
834 sfree (databases);
835 databases_num = 0;
837 udb_query_free (queries, queries_num);
838 queries = NULL;
839 queries_num = 0;
841 return (0);
842 } /* }}} int cdbi_shutdown */
844 void module_register (void) /* {{{ */
845 {
846 plugin_register_complex_config ("dbi", cdbi_config);
847 plugin_register_init ("dbi", cdbi_init);
848 plugin_register_shutdown ("dbi", cdbi_shutdown);
849 } /* }}} void module_register */
851 /*
852 * vim: shiftwidth=2 softtabstop=2 et fdm=marker
853 */