![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
diff --git a/src/dbi.c b/src/dbi.c
--- /dev/null
+++ b/src/dbi.c
@@ -0,0 +1,871 @@
+/**
+ * collectd - src/dbi.c
+ * Copyright (C) 2008-2015 Florian octo Forster
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * Florian octo Forster <octo at collectd.org>
+ **/
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+#include "configfile.h"
+#include "utils_db_query.h"
+
+#include <dbi/dbi.h>
+
+/* libdbi 0.9.0 introduced a new thread-safe interface and marked the old
+ * functions "deprecated". These macros convert the new functions to their old
+ * counterparts for backwards compatibility. */
+#if !defined(LIBDBI_VERSION) || (LIBDBI_VERSION < 900)
+# define HAVE_LEGACY_LIBDBI 1
+# define dbi_initialize_r(a,inst) dbi_initialize(a)
+# define dbi_shutdown_r(inst) dbi_shutdown()
+# define dbi_set_verbosity_r(a,inst) dbi_set_verbosity(a)
+# define dbi_driver_list_r(a,inst) dbi_driver_list(a)
+# define dbi_driver_open_r(a,inst) dbi_driver_open(a)
+#endif
+
+/*
+ * Data types
+ */
+struct cdbi_driver_option_s /* {{{ */
+{
+ char *key;
+ union
+ {
+ char *string;
+ int numeric;
+ } value;
+ _Bool is_numeric;
+};
+typedef struct cdbi_driver_option_s cdbi_driver_option_t; /* }}} */
+
+struct cdbi_database_s /* {{{ */
+{
+ char *name;
+ char *select_db;
+
+ char *driver;
+ char *host;
+ cdbi_driver_option_t *driver_options;
+ size_t driver_options_num;
+
+ udb_query_preparation_area_t **q_prep_areas;
+ udb_query_t **queries;
+ size_t queries_num;
+
+ dbi_conn connection;
+};
+typedef struct cdbi_database_s cdbi_database_t; /* }}} */
+
+/*
+ * Global variables
+ */
+#if !defined(HAVE_LEGACY_LIBDBI) || !HAVE_LEGACY_LIBDBI
+static dbi_inst dbi_instance = 0;
+#endif
+static udb_query_t **queries = NULL;
+static size_t queries_num = 0;
+static cdbi_database_t **databases = NULL;
+static size_t databases_num = 0;
+
+static int cdbi_read_database (user_data_t *ud);
+
+/*
+ * Functions
+ */
+static const char *cdbi_strerror (dbi_conn conn, /* {{{ */
+ char *buffer, size_t buffer_size)
+{
+ const char *msg;
+ int status;
+
+ if (conn == NULL)
+ {
+ sstrncpy (buffer, "connection is NULL", buffer_size);
+ return (buffer);
+ }
+
+ msg = NULL;
+ status = dbi_conn_error (conn, &msg);
+ if ((status >= 0) && (msg != NULL))
+ ssnprintf (buffer, buffer_size, "%s (status %i)", msg, status);
+ else
+ ssnprintf (buffer, buffer_size, "dbi_conn_error failed with status %i",
+ status);
+
+ return (buffer);
+} /* }}} const char *cdbi_conn_error */
+
+static int cdbi_result_get_field (dbi_result res, /* {{{ */
+ unsigned int index, char *buffer, size_t buffer_size)
+{
+ unsigned short src_type;
+
+ src_type = dbi_result_get_field_type_idx (res, index);
+ if (src_type == DBI_TYPE_ERROR)
+ {
+ ERROR ("dbi plugin: cdbi_result_get: "
+ "dbi_result_get_field_type_idx failed.");
+ return (-1);
+ }
+
+ if (src_type == DBI_TYPE_INTEGER)
+ {
+ long long value;
+
+ value = dbi_result_get_longlong_idx (res, index);
+ ssnprintf (buffer, buffer_size, "%lli", value);
+ }
+ else if (src_type == DBI_TYPE_DECIMAL)
+ {
+ double value;
+
+ value = dbi_result_get_double_idx (res, index);
+ ssnprintf (buffer, buffer_size, "%63.15g", value);
+ }
+ else if (src_type == DBI_TYPE_STRING)
+ {
+ const char *value;
+
+ value = dbi_result_get_string_idx (res, index);
+ if (value == NULL)
+ sstrncpy (buffer, "", buffer_size);
+ else if (strcmp ("ERROR", value) == 0)
+ return (-1);
+ else
+ sstrncpy (buffer, value, buffer_size);
+ }
+ /* DBI_TYPE_BINARY */
+ /* DBI_TYPE_DATETIME */
+ else
+ {
+ const char *field_name;
+
+ field_name = dbi_result_get_field_name (res, index);
+ if (field_name == NULL)
+ field_name = "<unknown>";
+
+ ERROR ("dbi plugin: Column `%s': Don't know how to handle "
+ "source type %hu.",
+ field_name, src_type);
+ return (-1);
+ }
+
+ return (0);
+} /* }}} int cdbi_result_get_field */
+
+static void cdbi_database_free (cdbi_database_t *db) /* {{{ */
+{
+ size_t i;
+
+ if (db == NULL)
+ return;
+
+ sfree (db->name);
+ sfree (db->driver);
+
+ for (i = 0; i < db->driver_options_num; i++)
+ {
+ sfree (db->driver_options[i].key);
+ if (!db->driver_options[i].is_numeric)
+ sfree (db->driver_options[i].value.string);
+ }
+ sfree (db->driver_options);
+
+ if (db->q_prep_areas)
+ for (i = 0; i < db->queries_num; ++i)
+ udb_query_delete_preparation_area (db->q_prep_areas[i]);
+ free (db->q_prep_areas);
+
+ sfree (db);
+} /* }}} void cdbi_database_free */
+
+/* Configuration handling functions {{{
+ *
+ * <Plugin dbi>
+ * <Query "plugin_instance0">
+ * Statement "SELECT name, value FROM table"
+ * <Result>
+ * Type "gauge"
+ * InstancesFrom "name"
+ * ValuesFrom "value"
+ * </Result>
+ * ...
+ * </Query>
+ *
+ * <Database "plugin_instance1">
+ * Driver "mysql"
+ * DriverOption "hostname" "localhost"
+ * ...
+ * Query "plugin_instance0"
+ * </Database>
+ * </Plugin>
+ */
+
+static int cdbi_config_add_database_driver_option (cdbi_database_t *db, /* {{{ */
+ oconfig_item_t *ci)
+{
+ cdbi_driver_option_t *option;
+
+ if ((ci->values_num != 2)
+ || (ci->values[0].type != OCONFIG_TYPE_STRING)
+ || ((ci->values[1].type != OCONFIG_TYPE_STRING)
+ && (ci->values[1].type != OCONFIG_TYPE_NUMBER)))
+ {
+ WARNING ("dbi plugin: The `DriverOption' config option "
+ "needs exactly two arguments.");
+ return (-1);
+ }
+
+ option = (cdbi_driver_option_t *) realloc (db->driver_options,
+ sizeof (*option) * (db->driver_options_num + 1));
+ if (option == NULL)
+ {
+ ERROR ("dbi plugin: realloc failed");
+ return (-1);
+ }
+
+ db->driver_options = option;
+ option = db->driver_options + db->driver_options_num;
+ memset (option, 0, sizeof (*option));
+
+ option->key = strdup (ci->values[0].value.string);
+ if (option->key == NULL)
+ {
+ ERROR ("dbi plugin: strdup failed.");
+ return (-1);
+ }
+
+ if (ci->values[1].type == OCONFIG_TYPE_STRING)
+ {
+ option->value.string = strdup (ci->values[1].value.string);
+ if (option->value.string == NULL)
+ {
+ ERROR ("dbi plugin: strdup failed.");
+ sfree (option->key);
+ return (-1);
+ }
+ }
+ else
+ {
+ assert (ci->values[1].type == OCONFIG_TYPE_NUMBER);
+ option->value.numeric = (int) (ci->values[1].value.number + .5);
+ option->is_numeric = 1;
+ }
+
+ db->driver_options_num++;
+ return (0);
+} /* }}} int cdbi_config_add_database_driver_option */
+
+static int cdbi_config_add_database (oconfig_item_t *ci) /* {{{ */
+{
+ cdbi_database_t *db;
+ int status;
+ int i;
+
+ if ((ci->values_num != 1)
+ || (ci->values[0].type != OCONFIG_TYPE_STRING))
+ {
+ WARNING ("dbi plugin: The `Database' block "
+ "needs exactly one string argument.");
+ return (-1);
+ }
+
+ db = (cdbi_database_t *) malloc (sizeof (*db));
+ if (db == NULL)
+ {
+ ERROR ("dbi plugin: malloc failed.");
+ return (-1);
+ }
+ memset (db, 0, sizeof (*db));
+
+ status = cf_util_get_string (ci, &db->name);
+ if (status != 0)
+ {
+ sfree (db);
+ return (status);
+ }
+
+ /* Fill the `cdbi_database_t' structure.. */
+ for (i = 0; i < ci->children_num; i++)
+ {
+ oconfig_item_t *child = ci->children + i;
+
+ if (strcasecmp ("Driver", child->key) == 0)
+ status = cf_util_get_string (child, &db->driver);
+ else if (strcasecmp ("DriverOption", child->key) == 0)
+ status = cdbi_config_add_database_driver_option (db, child);
+ else if (strcasecmp ("SelectDB", child->key) == 0)
+ status = cf_util_get_string (child, &db->select_db);
+ else if (strcasecmp ("Query", child->key) == 0)
+ status = udb_query_pick_from_list (child, queries, queries_num,
+ &db->queries, &db->queries_num);
+ else if (strcasecmp ("Host", child->key) == 0)
+ status = cf_util_get_string (child, &db->host);
+ else
+ {
+ WARNING ("dbi plugin: Option `%s' not allowed here.", child->key);
+ status = -1;
+ }
+
+ if (status != 0)
+ break;
+ }
+
+ /* Check that all necessary options have been given. */
+ while (status == 0)
+ {
+ if (db->driver == NULL)
+ {
+ WARNING ("dbi plugin: `Driver' not given for database `%s'", db->name);
+ status = -1;
+ }
+ if (db->driver_options_num == 0)
+ {
+ WARNING ("dbi plugin: No `DriverOption' given for database `%s'. "
+ "This will likely not work.", db->name);
+ }
+
+ break;
+ } /* while (status == 0) */
+
+ while ((status == 0) && (db->queries_num > 0))
+ {
+ db->q_prep_areas = (udb_query_preparation_area_t **) calloc (
+ db->queries_num, sizeof (*db->q_prep_areas));
+
+ if (db->q_prep_areas == NULL)
+ {
+ WARNING ("dbi plugin: malloc failed");
+ status = -1;
+ break;
+ }
+
+ for (i = 0; i < db->queries_num; ++i)
+ {
+ db->q_prep_areas[i]
+ = udb_query_allocate_preparation_area (db->queries[i]);
+
+ if (db->q_prep_areas[i] == NULL)
+ {
+ WARNING ("dbi plugin: udb_query_allocate_preparation_area failed");
+ status = -1;
+ break;
+ }
+ }
+
+ break;
+ }
+
+ /* If all went well, add this database to the global list of databases. */
+ if (status == 0)
+ {
+ cdbi_database_t **temp;
+
+ temp = (cdbi_database_t **) realloc (databases,
+ sizeof (*databases) * (databases_num + 1));
+ if (temp == NULL)
+ {
+ ERROR ("dbi plugin: realloc failed");
+ status = -1;
+ }
+ else
+ {
+ user_data_t ud;
+ char *name = NULL;
+
+ databases = temp;
+ databases[databases_num] = db;
+ databases_num++;
+
+ memset (&ud, 0, sizeof (ud));
+ ud.data = (void *) db;
+ ud.free_func = NULL;
+ name = ssnprintf_alloc("dbi:%s", db->name);
+
+ plugin_register_complex_read (/* group = */ NULL,
+ /* name = */ name ? name : db->name,
+ /* callback = */ cdbi_read_database,
+ /* interval = */ NULL,
+ /* user_data = */ &ud);
+ free (name);
+ }
+ }
+
+ if (status != 0)
+ {
+ cdbi_database_free (db);
+ return (-1);
+ }
+
+ return (0);
+} /* }}} int cdbi_config_add_database */
+
+static int cdbi_config (oconfig_item_t *ci) /* {{{ */
+{
+ int i;
+
+ for (i = 0; i < ci->children_num; i++)
+ {
+ oconfig_item_t *child = ci->children + i;
+ if (strcasecmp ("Query", child->key) == 0)
+ udb_query_create (&queries, &queries_num, child,
+ /* callback = */ NULL);
+ else if (strcasecmp ("Database", child->key) == 0)
+ cdbi_config_add_database (child);
+ else
+ {
+ WARNING ("dbi plugin: Ignoring unknown config option `%s'.", child->key);
+ }
+ } /* for (ci->children) */
+
+ return (0);
+} /* }}} int cdbi_config */
+
+/* }}} End of configuration handling functions */
+
+static int cdbi_init (void) /* {{{ */
+{
+ static int did_init = 0;
+ int status;
+
+ if (did_init != 0)
+ return (0);
+
+ if (queries_num == 0)
+ {
+ ERROR ("dbi plugin: No <Query> blocks have been found. Without them, "
+ "this plugin can't do anything useful, so we will returns an error.");
+ return (-1);
+ }
+
+ if (databases_num == 0)
+ {
+ ERROR ("dbi plugin: No <Database> blocks have been found. Without them, "
+ "this plugin can't do anything useful, so we will returns an error.");
+ return (-1);
+ }
+
+ status = dbi_initialize_r (/* driverdir = */ NULL, &dbi_instance);
+ if (status < 0)
+ {
+ ERROR ("dbi plugin: cdbi_init: dbi_initialize_r failed with status %i.",
+ status);
+ return (-1);
+ }
+ else if (status == 0)
+ {
+ ERROR ("dbi plugin: `dbi_initialize_r' could not load any drivers. Please "
+ "install at least one `DBD' or check your installation.");
+ return (-1);
+ }
+ DEBUG ("dbi plugin: cdbi_init: dbi_initialize_r reports %i driver%s.",
+ status, (status == 1) ? "" : "s");
+
+ return (0);
+} /* }}} int cdbi_init */
+
+static int cdbi_read_database_query (cdbi_database_t *db, /* {{{ */
+ udb_query_t *q, udb_query_preparation_area_t *prep_area)
+{
+ const char *statement;
+ dbi_result res;
+ size_t column_num;
+ char **column_names;
+ char **column_values;
+ int status;
+ size_t i;
+
+ /* Macro that cleans up dynamically allocated memory and returns the
+ * specified status. */
+#define BAIL_OUT(status) \
+ if (column_names != NULL) { sfree (column_names[0]); sfree (column_names); } \
+ if (column_values != NULL) { sfree (column_values[0]); sfree (column_values); } \
+ if (res != NULL) { dbi_result_free (res); res = NULL; } \
+ return (status)
+
+ column_names = NULL;
+ column_values = NULL;
+ res = NULL;
+
+ statement = udb_query_get_statement (q);
+ assert (statement != NULL);
+
+ res = dbi_conn_query (db->connection, statement);
+ if (res == NULL)
+ {
+ char errbuf[1024];
+ ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
+ "dbi_conn_query failed: %s",
+ db->name, udb_query_get_name (q),
+ cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
+ BAIL_OUT (-1);
+ }
+ else /* Get the number of columns */
+ {
+ unsigned int db_status;
+
+ db_status = dbi_result_get_numfields (res);
+ if (db_status == DBI_FIELD_ERROR)
+ {
+ char errbuf[1024];
+ ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
+ "dbi_result_get_numfields failed: %s",
+ db->name, udb_query_get_name (q),
+ cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
+ BAIL_OUT (-1);
+ }
+
+ column_num = (size_t) db_status;
+ DEBUG ("cdbi_read_database_query (%s, %s): There are %zu columns.",
+ db->name, udb_query_get_name (q), column_num);
+ }
+
+ /* Allocate `column_names' and `column_values'. {{{ */
+ column_names = (char **) calloc (column_num, sizeof (char *));
+ if (column_names == NULL)
+ {
+ ERROR ("dbi plugin: malloc failed.");
+ BAIL_OUT (-1);
+ }
+
+ column_names[0] = (char *) calloc (column_num,
+ DATA_MAX_NAME_LEN * sizeof (char));
+ if (column_names[0] == NULL)
+ {
+ ERROR ("dbi plugin: malloc failed.");
+ BAIL_OUT (-1);
+ }
+ for (i = 1; i < column_num; i++)
+ column_names[i] = column_names[i - 1] + DATA_MAX_NAME_LEN;
+
+ column_values = (char **) calloc (column_num, sizeof (char *));
+ if (column_values == NULL)
+ {
+ ERROR ("dbi plugin: malloc failed.");
+ BAIL_OUT (-1);
+ }
+
+ column_values[0] = (char *) calloc (column_num,
+ DATA_MAX_NAME_LEN * sizeof (char));
+ if (column_values[0] == NULL)
+ {
+ ERROR ("dbi plugin: malloc failed.");
+ BAIL_OUT (-1);
+ }
+ for (i = 1; i < column_num; i++)
+ column_values[i] = column_values[i - 1] + DATA_MAX_NAME_LEN;
+ /* }}} */
+
+ /* Copy the field names to `column_names' */
+ for (i = 0; i < column_num; i++) /* {{{ */
+ {
+ const char *column_name;
+
+ column_name = dbi_result_get_field_name (res, (unsigned int) (i + 1));
+ if (column_name == NULL)
+ {
+ ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
+ "Cannot retrieve name of field %zu.",
+ db->name, udb_query_get_name (q), i + 1);
+ BAIL_OUT (-1);
+ }
+
+ sstrncpy (column_names[i], column_name, DATA_MAX_NAME_LEN);
+ } /* }}} for (i = 0; i < column_num; i++) */
+
+ udb_query_prepare_result (q, prep_area, (db->host ? db->host : hostname_g),
+ /* plugin = */ "dbi", db->name,
+ column_names, column_num, /* interval = */ 0);
+
+ /* 0 = error; 1 = success; */
+ status = dbi_result_first_row (res); /* {{{ */
+ if (status != 1)
+ {
+ char errbuf[1024];
+ ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
+ "dbi_result_first_row failed: %s. Maybe the statement didn't "
+ "return any rows?",
+ db->name, udb_query_get_name (q),
+ cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
+ udb_query_finish_result (q, prep_area);
+ BAIL_OUT (-1);
+ } /* }}} */
+
+ /* Iterate over all rows and call `udb_query_handle_result' with each list of
+ * values. */
+ while (42) /* {{{ */
+ {
+ status = 0;
+ /* Copy the value of the columns to `column_values' */
+ for (i = 0; i < column_num; i++) /* {{{ */
+ {
+ status = cdbi_result_get_field (res, (unsigned int) (i + 1),
+ column_values[i], DATA_MAX_NAME_LEN);
+
+ if (status != 0)
+ {
+ ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
+ "cdbi_result_get_field (%zu) failed.",
+ db->name, udb_query_get_name (q), i + 1);
+ status = -1;
+ break;
+ }
+ } /* }}} for (i = 0; i < column_num; i++) */
+
+ /* If all values were copied successfully, call `udb_query_handle_result'
+ * to dispatch the row to the daemon. */
+ if (status == 0) /* {{{ */
+ {
+ status = udb_query_handle_result (q, prep_area, column_values);
+ if (status != 0)
+ {
+ ERROR ("dbi plugin: cdbi_read_database_query (%s, %s): "
+ "udb_query_handle_result failed.",
+ db->name, udb_query_get_name (q));
+ }
+ } /* }}} */
+
+ /* Get the next row from the database. */
+ status = dbi_result_next_row (res); /* {{{ */
+ if (status != 1)
+ {
+ if (dbi_conn_error (db->connection, NULL) != 0)
+ {
+ char errbuf[1024];
+ WARNING ("dbi plugin: cdbi_read_database_query (%s, %s): "
+ "dbi_result_next_row failed: %s.",
+ db->name, udb_query_get_name (q),
+ cdbi_strerror (db->connection, errbuf, sizeof (errbuf)));
+ }
+ break;
+ } /* }}} */
+ } /* }}} while (42) */
+
+ /* Tell the db query interface that we're done with this query. */
+ udb_query_finish_result (q, prep_area);
+
+ /* Clean up and return `status = 0' (success) */
+ BAIL_OUT (0);
+#undef BAIL_OUT
+} /* }}} int cdbi_read_database_query */
+
+static int cdbi_connect_database (cdbi_database_t *db) /* {{{ */
+{
+ dbi_driver driver;
+ dbi_conn connection;
+ size_t i;
+ int status;
+
+ if (db->connection != NULL)
+ {
+ status = dbi_conn_ping (db->connection);
+ if (status != 0) /* connection is alive */
+ return (0);
+
+ dbi_conn_close (db->connection);
+ db->connection = NULL;
+ }
+
+ driver = dbi_driver_open_r (db->driver, dbi_instance);
+ if (driver == NULL)
+ {
+ ERROR ("dbi plugin: cdbi_connect_database: dbi_driver_open_r (%s) failed.",
+ db->driver);
+ INFO ("dbi plugin: Maybe the driver isn't installed? "
+ "Known drivers are:");
+ for (driver = dbi_driver_list_r (NULL, dbi_instance);
+ driver != NULL;
+ driver = dbi_driver_list_r (driver, dbi_instance))
+ {
+ INFO ("dbi plugin: * %s", dbi_driver_get_name (driver));
+ }
+ return (-1);
+ }
+
+ connection = dbi_conn_open (driver);
+ if (connection == NULL)
+ {
+ ERROR ("dbi plugin: cdbi_connect_database: dbi_conn_open (%s) failed.",
+ db->driver);
+ return (-1);
+ }
+
+ /* Set all the driver options. Because this is a very very very generic
+ * interface, the error handling is kind of long. If an invalid option is
+ * encountered, it will get a list of options understood by the driver and
+ * report that as `INFO'. This way, users hopefully don't have too much
+ * trouble finding out how to configure the plugin correctly.. */
+ for (i = 0; i < db->driver_options_num; i++)
+ {
+ if (db->driver_options[i].is_numeric)
+ {
+ status = dbi_conn_set_option_numeric (connection,
+ db->driver_options[i].key, db->driver_options[i].value.numeric);
+ if (status != 0)
+ {
+ char errbuf[1024];
+ ERROR ("dbi plugin: cdbi_connect_database (%s): "
+ "dbi_conn_set_option_numeric (\"%s\", %i) failed: %s.",
+ db->name,
+ db->driver_options[i].key, db->driver_options[i].value.numeric,
+ cdbi_strerror (connection, errbuf, sizeof (errbuf)));
+ }
+ }
+ else
+ {
+ status = dbi_conn_set_option (connection,
+ db->driver_options[i].key, db->driver_options[i].value.string);
+ if (status != 0)
+ {
+ char errbuf[1024];
+ ERROR ("dbi plugin: cdbi_connect_database (%s): "
+ "dbi_conn_set_option (\"%s\", \"%s\") failed: %s.",
+ db->name,
+ db->driver_options[i].key, db->driver_options[i].value.string,
+ cdbi_strerror (connection, errbuf, sizeof (errbuf)));
+ }
+ }
+
+ if (status != 0)
+ {
+ char const *opt;
+
+ INFO ("dbi plugin: This is a list of all options understood "
+ "by the `%s' driver:", db->driver);
+ for (opt = dbi_conn_get_option_list (connection, NULL);
+ opt != NULL;
+ opt = dbi_conn_get_option_list (connection, opt))
+ {
+ INFO ("dbi plugin: * %s", opt);
+ }
+
+ dbi_conn_close (connection);
+ return (-1);
+ }
+ } /* for (i = 0; i < db->driver_options_num; i++) */
+
+ status = dbi_conn_connect (connection);
+ if (status != 0)
+ {
+ char errbuf[1024];
+ ERROR ("dbi plugin: cdbi_connect_database (%s): "
+ "dbi_conn_connect failed: %s",
+ db->name, cdbi_strerror (connection, errbuf, sizeof (errbuf)));
+ dbi_conn_close (connection);
+ return (-1);
+ }
+
+ if (db->select_db != NULL)
+ {
+ status = dbi_conn_select_db (connection, db->select_db);
+ if (status != 0)
+ {
+ char errbuf[1024];
+ WARNING ("dbi plugin: cdbi_connect_database (%s): "
+ "dbi_conn_select_db (%s) failed: %s. Check the `SelectDB' option.",
+ db->name, db->select_db,
+ cdbi_strerror (connection, errbuf, sizeof (errbuf)));
+ dbi_conn_close (connection);
+ return (-1);
+ }
+ }
+
+ db->connection = connection;
+ return (0);
+} /* }}} int cdbi_connect_database */
+
+static int cdbi_read_database (user_data_t *ud) /* {{{ */
+{
+ cdbi_database_t *db = (cdbi_database_t *) ud->data;
+ size_t i;
+ int success;
+ int status;
+
+ unsigned int db_version;
+
+ status = cdbi_connect_database (db);
+ if (status != 0)
+ return (status);
+ assert (db->connection != NULL);
+
+ db_version = dbi_conn_get_engine_version (db->connection);
+ /* TODO: Complain if `db_version == 0' */
+
+ success = 0;
+ for (i = 0; i < db->queries_num; i++)
+ {
+ /* Check if we know the database's version and if so, if this query applies
+ * to that version. */
+ if ((db_version != 0)
+ && (udb_query_check_version (db->queries[i], db_version) == 0))
+ continue;
+
+ status = cdbi_read_database_query (db,
+ db->queries[i], db->q_prep_areas[i]);
+ if (status == 0)
+ success++;
+ }
+
+ if (success == 0)
+ {
+ ERROR ("dbi plugin: All queries failed for database `%s'.", db->name);
+ return (-1);
+ }
+
+ return (0);
+} /* }}} int cdbi_read_database */
+
+static int cdbi_shutdown (void) /* {{{ */
+{
+ size_t i;
+
+ for (i = 0; i < databases_num; i++)
+ {
+ if (databases[i]->connection != NULL)
+ {
+ dbi_conn_close (databases[i]->connection);
+ databases[i]->connection = NULL;
+ }
+ cdbi_database_free (databases[i]);
+ }
+ sfree (databases);
+ databases_num = 0;
+
+ udb_query_free (queries, queries_num);
+ queries = NULL;
+ queries_num = 0;
+
+ return (0);
+} /* }}} int cdbi_shutdown */
+
+void module_register (void) /* {{{ */
+{
+ plugin_register_complex_config ("dbi", cdbi_config);
+ plugin_register_init ("dbi", cdbi_init);
+ plugin_register_shutdown ("dbi", cdbi_shutdown);
+} /* }}} void module_register */
+
+/*
+ * vim: shiftwidth=2 softtabstop=2 et fdm=marker
+ */