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"
28 #include "common.h"
29 #include "plugin.h"
30 #include "configfile.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 char *driver;
68 char *host;
69 cdbi_driver_option_t *driver_options;
70 size_t driver_options_num;
72 udb_query_preparation_area_t **q_prep_areas;
73 udb_query_t **queries;
74 size_t queries_num;
76 dbi_conn connection;
77 };
78 typedef struct cdbi_database_s cdbi_database_t; /* }}} */
80 /*
81 * Global variables
82 */
83 #if !defined(HAVE_LEGACY_LIBDBI) || !HAVE_LEGACY_LIBDBI
84 static dbi_inst dbi_instance = 0;
85 #endif
86 static udb_query_t **queries = NULL;
87 static size_t queries_num = 0;
88 static cdbi_database_t **databases = NULL;
89 static size_t databases_num = 0;
91 static int cdbi_read_database (user_data_t *ud);
93 /*
94 * Functions
95 */
96 static const char *cdbi_strerror (dbi_conn conn, /* {{{ */
97 char *buffer, size_t buffer_size)
98 {
99 const char *msg;
100 int status;
102 if (conn == NULL)
103 {
104 sstrncpy (buffer, "connection is NULL", buffer_size);
105 return (buffer);
106 }
108 msg = NULL;
109 status = dbi_conn_error (conn, &msg);
110 if ((status >= 0) && (msg != NULL))
111 ssnprintf (buffer, buffer_size, "%s (status %i)", msg, status);
112 else
113 ssnprintf (buffer, buffer_size, "dbi_conn_error failed with status %i",
114 status);
116 return (buffer);
117 } /* }}} const char *cdbi_conn_error */
119 static int cdbi_result_get_field (dbi_result res, /* {{{ */
120 unsigned int index, char *buffer, size_t buffer_size)
121 {
122 unsigned short src_type;
124 src_type = dbi_result_get_field_type_idx (res, index);
125 if (src_type == DBI_TYPE_ERROR)
126 {
127 ERROR ("dbi plugin: cdbi_result_get: "
128 "dbi_result_get_field_type_idx failed.");
129 return (-1);
130 }
132 if (src_type == DBI_TYPE_INTEGER)
133 {
134 long long value;
136 value = dbi_result_get_longlong_idx (res, index);
137 ssnprintf (buffer, buffer_size, "%lli", value);
138 }
139 else if (src_type == DBI_TYPE_DECIMAL)
140 {
141 double value;
143 value = dbi_result_get_double_idx (res, index);
144 ssnprintf (buffer, buffer_size, "%63.15g", value);
145 }
146 else if (src_type == DBI_TYPE_STRING)
147 {
148 const char *value;
150 value = dbi_result_get_string_idx (res, index);
151 if (value == NULL)
152 sstrncpy (buffer, "", buffer_size);
153 else if (strcmp ("ERROR", value) == 0)
154 return (-1);
155 else
156 sstrncpy (buffer, value, buffer_size);
157 }
158 /* DBI_TYPE_BINARY */
159 /* DBI_TYPE_DATETIME */
160 else
161 {
162 const char *field_name;
164 field_name = dbi_result_get_field_name (res, index);
165 if (field_name == NULL)
166 field_name = "<unknown>";
168 ERROR ("dbi plugin: Column `%s': Don't know how to handle "
169 "source type %hu.",
170 field_name, src_type);
171 return (-1);
172 }
174 return (0);
175 } /* }}} int cdbi_result_get_field */
177 static void cdbi_database_free (cdbi_database_t *db) /* {{{ */
178 {
179 size_t i;
181 if (db == NULL)
182 return;
184 sfree (db->name);
185 sfree (db->driver);
187 for (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 (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 * DriverOption "hostname" "localhost"
219 * ...
220 * Query "plugin_instance0"
221 * </Database>
222 * </Plugin>
223 */
225 static int cdbi_config_add_database_driver_option (cdbi_database_t *db, /* {{{ */
226 oconfig_item_t *ci)
227 {
228 cdbi_driver_option_t *option;
230 if ((ci->values_num != 2)
231 || (ci->values[0].type != OCONFIG_TYPE_STRING)
232 || ((ci->values[1].type != OCONFIG_TYPE_STRING)
233 && (ci->values[1].type != OCONFIG_TYPE_NUMBER)))
234 {
235 WARNING ("dbi plugin: The `DriverOption' config option "
236 "needs exactly two arguments.");
237 return (-1);
238 }
240 option = (cdbi_driver_option_t *) realloc (db->driver_options,
241 sizeof (*option) * (db->driver_options_num + 1));
242 if (option == NULL)
243 {
244 ERROR ("dbi plugin: realloc failed");
245 return (-1);
246 }
248 db->driver_options = option;
249 option = db->driver_options + db->driver_options_num;
250 memset (option, 0, sizeof (*option));
252 option->key = strdup (ci->values[0].value.string);
253 if (option->key == NULL)
254 {
255 ERROR ("dbi plugin: strdup failed.");
256 return (-1);
257 }
259 if (ci->values[1].type == OCONFIG_TYPE_STRING)
260 {
261 option->value.string = strdup (ci->values[1].value.string);
262 if (option->value.string == NULL)
263 {
264 ERROR ("dbi plugin: strdup failed.");
265 sfree (option->key);
266 return (-1);
267 }
268 }
269 else
270 {
271 assert (ci->values[1].type == OCONFIG_TYPE_NUMBER);
272 option->value.numeric = (int) (ci->values[1].value.number + .5);
273 option->is_numeric = 1;
274 }
276 db->driver_options_num++;
277 return (0);
278 } /* }}} int cdbi_config_add_database_driver_option */
280 static int cdbi_config_add_database (oconfig_item_t *ci) /* {{{ */
281 {
282 cdbi_database_t *db;
283 int status;
284 int i;
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 = (cdbi_database_t *) malloc (sizeof (*db));
295 if (db == NULL)
296 {
297 ERROR ("dbi plugin: malloc failed.");
298 return (-1);
299 }
300 memset (db, 0, sizeof (*db));
302 status = cf_util_get_string (ci, &db->name);
303 if (status != 0)
304 {
305 sfree (db);
306 return (status);
307 }
309 /* Fill the `cdbi_database_t' structure.. */
310 for (i = 0; i < ci->children_num; i++)
311 {
312 oconfig_item_t *child = ci->children + i;
314 if (strcasecmp ("Driver", child->key) == 0)
315 status = cf_util_get_string (child, &db->driver);
316 else if (strcasecmp ("DriverOption", child->key) == 0)
317 status = cdbi_config_add_database_driver_option (db, child);
318 else if (strcasecmp ("SelectDB", child->key) == 0)
319 status = cf_util_get_string (child, &db->select_db);
320 else if (strcasecmp ("Query", child->key) == 0)
321 status = udb_query_pick_from_list (child, queries, queries_num,
322 &db->queries, &db->queries_num);
323 else if (strcasecmp ("Host", child->key) == 0)
324 status = cf_util_get_string (child, &db->host);
325 else
326 {
327 WARNING ("dbi plugin: Option `%s' not allowed here.", child->key);
328 status = -1;
329 }
331 if (status != 0)
332 break;
333 }
335 /* Check that all necessary options have been given. */
336 while (status == 0)
337 {
338 if (db->driver == NULL)
339 {
340 WARNING ("dbi plugin: `Driver' not given for database `%s'", db->name);
341 status = -1;
342 }
343 if (db->driver_options_num == 0)
344 {
345 WARNING ("dbi plugin: No `DriverOption' given for database `%s'. "
346 "This will likely not work.", db->name);
347 }
349 break;
350 } /* while (status == 0) */
352 while ((status == 0) && (db->queries_num > 0))
353 {
354 size_t j;
355 db->q_prep_areas = (udb_query_preparation_area_t **) calloc (
356 db->queries_num, sizeof (*db->q_prep_areas));
358 if (db->q_prep_areas == NULL)
359 {
360 WARNING ("dbi plugin: malloc failed");
361 status = -1;
362 break;
363 }
365 for (j = 0; j < db->queries_num; ++j)
366 {
367 db->q_prep_areas[j]
368 = udb_query_allocate_preparation_area (db->queries[j]);
370 if (db->q_prep_areas[j] == NULL)
371 {
372 WARNING ("dbi plugin: udb_query_allocate_preparation_area failed");
373 status = -1;
374 break;
375 }
376 }
378 break;
379 }
381 /* If all went well, add this database to the global list of databases. */
382 if (status == 0)
383 {
384 cdbi_database_t **temp;
386 temp = (cdbi_database_t **) realloc (databases,
387 sizeof (*databases) * (databases_num + 1));
388 if (temp == NULL)
389 {
390 ERROR ("dbi plugin: realloc failed");
391 status = -1;
392 }
393 else
394 {
395 user_data_t ud;
396 char *name = NULL;
398 databases = temp;
399 databases[databases_num] = db;
400 databases_num++;
402 memset (&ud, 0, sizeof (ud));
403 ud.data = (void *) db;
404 ud.free_func = NULL;
405 name = ssnprintf_alloc("dbi:%s", db->name);
407 plugin_register_complex_read (/* group = */ NULL,
408 /* name = */ name ? name : db->name,
409 /* callback = */ cdbi_read_database,
410 /* interval = */ 0,
411 /* user_data = */ &ud);
412 free (name);
413 }
414 }
416 if (status != 0)
417 {
418 cdbi_database_free (db);
419 return (-1);
420 }
422 return (0);
423 } /* }}} int cdbi_config_add_database */
425 static int cdbi_config (oconfig_item_t *ci) /* {{{ */
426 {
427 int i;
429 for (i = 0; i < ci->children_num; i++)
430 {
431 oconfig_item_t *child = ci->children + i;
432 if (strcasecmp ("Query", child->key) == 0)
433 udb_query_create (&queries, &queries_num, child,
434 /* callback = */ NULL);
435 else if (strcasecmp ("Database", child->key) == 0)
436 cdbi_config_add_database (child);
437 else
438 {
439 WARNING ("dbi plugin: Ignoring unknown config option `%s'.", child->key);
440 }
441 } /* for (ci->children) */
443 return (0);
444 } /* }}} int cdbi_config */
446 /* }}} End of configuration handling functions */
448 static int cdbi_init (void) /* {{{ */
449 {
450 static int did_init = 0;
451 int status;
453 if (did_init != 0)
454 return (0);
456 if (queries_num == 0)
457 {
458 ERROR ("dbi plugin: No <Query> blocks have been found. Without them, "
459 "this plugin can't do anything useful, so we will returns an error.");
460 return (-1);
461 }
463 if (databases_num == 0)
464 {
465 ERROR ("dbi plugin: No <Database> blocks have been found. Without them, "
466 "this plugin can't do anything useful, so we will returns an error.");
467 return (-1);
468 }
470 status = dbi_initialize_r (/* driverdir = */ NULL, &dbi_instance);
471 if (status < 0)
472 {
473 ERROR ("dbi plugin: cdbi_init: dbi_initialize_r failed with status %i.",
474 status);
475 return (-1);
476 }
477 else if (status == 0)
478 {
479 ERROR ("dbi plugin: `dbi_initialize_r' could not load any drivers. Please "
480 "install at least one `DBD' or check your installation.");
481 return (-1);
482 }
483 DEBUG ("dbi plugin: cdbi_init: dbi_initialize_r reports %i driver%s.",
484 status, (status == 1) ? "" : "s");
486 return (0);
487 } /* }}} int cdbi_init */
489 static int cdbi_read_database_query (cdbi_database_t *db, /* {{{ */
490 udb_query_t *q, udb_query_preparation_area_t *prep_area)
491 {
492 const char *statement;
493 dbi_result res;
494 size_t column_num;
495 char **column_names;
496 char **column_values;
497 int status;
498 size_t i;
500 /* Macro that cleans up dynamically allocated memory and returns the
501 * specified status. */
502 #define BAIL_OUT(status) \
503 if (column_names != NULL) { sfree (column_names[0]); sfree (column_names); } \
504 if (column_values != NULL) { sfree (column_values[0]); sfree (column_values); } \
505 if (res != NULL) { dbi_result_free (res); res = NULL; } \
506 return (status)
508 column_names = NULL;
509 column_values = NULL;
510 res = NULL;
512 statement = udb_query_get_statement (q);
513 assert (statement != NULL);
515 res = dbi_conn_query (db->connection, statement);
516 if (res == NULL)
517 {
518 char errbuf[1024];
519 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
520 "dbi_conn_query failed: %s",
521 db->name, udb_query_get_name (q),
522 cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
523 BAIL_OUT (-1);
524 }
525 else /* Get the number of columns */
526 {
527 unsigned int db_status;
529 db_status = dbi_result_get_numfields (res);
530 if (db_status == DBI_FIELD_ERROR)
531 {
532 char errbuf[1024];
533 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
534 "dbi_result_get_numfields failed: %s",
535 db->name, udb_query_get_name (q),
536 cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
537 BAIL_OUT (-1);
538 }
540 column_num = (size_t) db_status;
541 DEBUG ("cdbi_read_database_query (%s, %s): There are %zu columns.",
542 db->name, udb_query_get_name (q), column_num);
543 }
545 /* Allocate `column_names' and `column_values'. {{{ */
546 column_names = (char **) calloc (column_num, sizeof (char *));
547 if (column_names == NULL)
548 {
549 ERROR ("dbi plugin: malloc failed.");
550 BAIL_OUT (-1);
551 }
553 column_names[0] = (char *) calloc (column_num,
554 DATA_MAX_NAME_LEN * sizeof (char));
555 if (column_names[0] == NULL)
556 {
557 ERROR ("dbi plugin: malloc failed.");
558 BAIL_OUT (-1);
559 }
560 for (i = 1; i < column_num; i++)
561 column_names[i] = column_names[i - 1] + DATA_MAX_NAME_LEN;
563 column_values = (char **) calloc (column_num, sizeof (char *));
564 if (column_values == NULL)
565 {
566 ERROR ("dbi plugin: malloc failed.");
567 BAIL_OUT (-1);
568 }
570 column_values[0] = (char *) calloc (column_num,
571 DATA_MAX_NAME_LEN * sizeof (char));
572 if (column_values[0] == NULL)
573 {
574 ERROR ("dbi plugin: malloc failed.");
575 BAIL_OUT (-1);
576 }
577 for (i = 1; i < column_num; i++)
578 column_values[i] = column_values[i - 1] + DATA_MAX_NAME_LEN;
579 /* }}} */
581 /* Copy the field names to `column_names' */
582 for (i = 0; i < column_num; i++) /* {{{ */
583 {
584 const char *column_name;
586 column_name = dbi_result_get_field_name (res, (unsigned int) (i + 1));
587 if (column_name == NULL)
588 {
589 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
590 "Cannot retrieve name of field %zu.",
591 db->name, udb_query_get_name (q), i + 1);
592 BAIL_OUT (-1);
593 }
595 sstrncpy (column_names[i], column_name, DATA_MAX_NAME_LEN);
596 } /* }}} for (i = 0; i < column_num; i++) */
598 udb_query_prepare_result (q, prep_area, (db->host ? db->host : hostname_g),
599 /* plugin = */ "dbi", db->name,
600 column_names, column_num, /* interval = */ 0);
602 /* 0 = error; 1 = success; */
603 status = dbi_result_first_row (res); /* {{{ */
604 if (status != 1)
605 {
606 char errbuf[1024];
607 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
608 "dbi_result_first_row failed: %s. Maybe the statement didn't "
609 "return any rows?",
610 db->name, udb_query_get_name (q),
611 cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
612 udb_query_finish_result (q, prep_area);
613 BAIL_OUT (-1);
614 } /* }}} */
616 /* Iterate over all rows and call `udb_query_handle_result' with each list of
617 * values. */
618 while (42) /* {{{ */
619 {
620 status = 0;
621 /* Copy the value of the columns to `column_values' */
622 for (i = 0; i < column_num; i++) /* {{{ */
623 {
624 status = cdbi_result_get_field (res, (unsigned int) (i + 1),
625 column_values[i], DATA_MAX_NAME_LEN);
627 if (status != 0)
628 {
629 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
630 "cdbi_result_get_field (%zu) failed.",
631 db->name, udb_query_get_name (q), i + 1);
632 status = -1;
633 break;
634 }
635 } /* }}} for (i = 0; i < column_num; i++) */
637 /* If all values were copied successfully, call `udb_query_handle_result'
638 * to dispatch the row to the daemon. */
639 if (status == 0) /* {{{ */
640 {
641 status = udb_query_handle_result (q, prep_area, column_values);
642 if (status != 0)
643 {
644 ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
645 "udb_query_handle_result failed.",
646 db->name, udb_query_get_name (q));
647 }
648 } /* }}} */
650 /* Get the next row from the database. */
651 status = dbi_result_next_row (res); /* {{{ */
652 if (status != 1)
653 {
654 if (dbi_conn_error (db->connection, NULL) != 0)
655 {
656 char errbuf[1024];
657 WARNING ("dbi plugin: cdbi_read_database_query (%s, %s): "
658 "dbi_result_next_row failed: %s.",
659 db->name, udb_query_get_name (q),
660 cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
661 }
662 break;
663 } /* }}} */
664 } /* }}} while (42) */
666 /* Tell the db query interface that we're done with this query. */
667 udb_query_finish_result (q, prep_area);
669 /* Clean up and return `status = 0' (success) */
670 BAIL_OUT (0);
671 #undef BAIL_OUT
672 } /* }}} int cdbi_read_database_query */
674 static int cdbi_connect_database (cdbi_database_t *db) /* {{{ */
675 {
676 dbi_driver driver;
677 dbi_conn connection;
678 size_t i;
679 int status;
681 if (db->connection != NULL)
682 {
683 status = dbi_conn_ping (db->connection);
684 if (status != 0) /* connection is alive */
685 return (0);
687 dbi_conn_close (db->connection);
688 db->connection = NULL;
689 }
691 driver = dbi_driver_open_r (db->driver, dbi_instance);
692 if (driver == NULL)
693 {
694 ERROR ("dbi plugin: cdbi_connect_database: dbi_driver_open_r (%s) failed.",
695 db->driver);
696 INFO ("dbi plugin: Maybe the driver isn't installed? "
697 "Known drivers are:");
698 for (driver = dbi_driver_list_r (NULL, dbi_instance);
699 driver != NULL;
700 driver = dbi_driver_list_r (driver, dbi_instance))
701 {
702 INFO ("dbi plugin: * %s", dbi_driver_get_name (driver));
703 }
704 return (-1);
705 }
707 connection = dbi_conn_open (driver);
708 if (connection == NULL)
709 {
710 ERROR ("dbi plugin: cdbi_connect_database: dbi_conn_open (%s) failed.",
711 db->driver);
712 return (-1);
713 }
715 /* Set all the driver options. Because this is a very very very generic
716 * interface, the error handling is kind of long. If an invalid option is
717 * encountered, it will get a list of options understood by the driver and
718 * report that as `INFO'. This way, users hopefully don't have too much
719 * trouble finding out how to configure the plugin correctly.. */
720 for (i = 0; i < db->driver_options_num; i++)
721 {
722 if (db->driver_options[i].is_numeric)
723 {
724 status = dbi_conn_set_option_numeric (connection,
725 db->driver_options[i].key, db->driver_options[i].value.numeric);
726 if (status != 0)
727 {
728 char errbuf[1024];
729 ERROR ("dbi plugin: cdbi_connect_database (%s): "
730 "dbi_conn_set_option_numeric (\"%s\", %i) failed: %s.",
731 db->name,
732 db->driver_options[i].key, db->driver_options[i].value.numeric,
733 cdbi_strerror (connection, errbuf, sizeof (errbuf)));
734 }
735 }
736 else
737 {
738 status = dbi_conn_set_option (connection,
739 db->driver_options[i].key, db->driver_options[i].value.string);
740 if (status != 0)
741 {
742 char errbuf[1024];
743 ERROR ("dbi plugin: cdbi_connect_database (%s): "
744 "dbi_conn_set_option (\"%s\", \"%s\") failed: %s.",
745 db->name,
746 db->driver_options[i].key, db->driver_options[i].value.string,
747 cdbi_strerror (connection, errbuf, sizeof (errbuf)));
748 }
749 }
751 if (status != 0)
752 {
753 char const *opt;
755 INFO ("dbi plugin: This is a list of all options understood "
756 "by the `%s' driver:", db->driver);
757 for (opt = dbi_conn_get_option_list (connection, NULL);
758 opt != NULL;
759 opt = dbi_conn_get_option_list (connection, opt))
760 {
761 INFO ("dbi plugin: * %s", opt);
762 }
764 dbi_conn_close (connection);
765 return (-1);
766 }
767 } /* for (i = 0; i < db->driver_options_num; i++) */
769 status = dbi_conn_connect (connection);
770 if (status != 0)
771 {
772 char errbuf[1024];
773 ERROR ("dbi plugin: cdbi_connect_database (%s): "
774 "dbi_conn_connect failed: %s",
775 db->name, cdbi_strerror (connection, errbuf, sizeof (errbuf)));
776 dbi_conn_close (connection);
777 return (-1);
778 }
780 if (db->select_db != NULL)
781 {
782 status = dbi_conn_select_db (connection, db->select_db);
783 if (status != 0)
784 {
785 char errbuf[1024];
786 WARNING ("dbi plugin: cdbi_connect_database (%s): "
787 "dbi_conn_select_db (%s) failed: %s. Check the `SelectDB' option.",
788 db->name, db->select_db,
789 cdbi_strerror (connection, errbuf, sizeof (errbuf)));
790 dbi_conn_close (connection);
791 return (-1);
792 }
793 }
795 db->connection = connection;
796 return (0);
797 } /* }}} int cdbi_connect_database */
799 static int cdbi_read_database (user_data_t *ud) /* {{{ */
800 {
801 cdbi_database_t *db = (cdbi_database_t *) ud->data;
802 size_t i;
803 int success;
804 int status;
806 unsigned int db_version;
808 status = cdbi_connect_database (db);
809 if (status != 0)
810 return (status);
811 assert (db->connection != NULL);
813 db_version = dbi_conn_get_engine_version (db->connection);
814 /* TODO: Complain if `db_version == 0' */
816 success = 0;
817 for (i = 0; i < db->queries_num; i++)
818 {
819 /* Check if we know the database's version and if so, if this query applies
820 * to that version. */
821 if ((db_version != 0)
822 && (udb_query_check_version (db->queries[i], db_version) == 0))
823 continue;
825 status = cdbi_read_database_query (db,
826 db->queries[i], db->q_prep_areas[i]);
827 if (status == 0)
828 success++;
829 }
831 if (success == 0)
832 {
833 ERROR ("dbi plugin: All queries failed for database `%s'.", db->name);
834 return (-1);
835 }
837 return (0);
838 } /* }}} int cdbi_read_database */
840 static int cdbi_shutdown (void) /* {{{ */
841 {
842 size_t i;
844 for (i = 0; i < databases_num; i++)
845 {
846 if (databases[i]->connection != NULL)
847 {
848 dbi_conn_close (databases[i]->connection);
849 databases[i]->connection = NULL;
850 }
851 cdbi_database_free (databases[i]);
852 }
853 sfree (databases);
854 databases_num = 0;
856 udb_query_free (queries, queries_num);
857 queries = NULL;
858 queries_num = 0;
860 return (0);
861 } /* }}} int cdbi_shutdown */
863 void module_register (void) /* {{{ */
864 {
865 plugin_register_complex_config ("dbi", cdbi_config);
866 plugin_register_init ("dbi", cdbi_init);
867 plugin_register_shutdown ("dbi", cdbi_shutdown);
868 } /* }}} void module_register */
870 /*
871 * vim: shiftwidth=2 softtabstop=2 et fdm=marker
872 */