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|
/*
+-------------------------------------------------------------------------+
| Copyright (C) 2002-2006 The Cacti Group |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301, USA |
| |
+-------------------------------------------------------------------------+
| cactid: a backend data gatherer for cacti |
+-------------------------------------------------------------------------+
| This poller would not have been possible without: |
| - Larry Adams (current development and enhancements) |
| - Rivo Nurges (rrd support, mysql poller cache, misc functions) |
| - RTG (core poller code, pthreads, snmp, autoconf examples) |
| - Brady Alleman/Doug Warner (threading ideas, implimentation details) |
+-------------------------------------------------------------------------+
| - Cacti - http://www.cacti.net/ |
+-------------------------------------------------------------------------+
*/
#include "common.h"
#include "cactid.h"
/*! \fn int db_insert(MYSQL *mysql, const char *query)
* \brief inserts a row or rows in a database table.
* \param mysql the database connection object
* \param query the database query to execute
*
* Unless the SQL_readonly boolean is set to TRUE, the function will execute
* the SQL statement specified in the query variable.
*
* \return TRUE if successful, or FALSE if not.
*
*/
int db_insert(MYSQL *mysql, const char *query) {
static int queryid = 0;
if (set.SQL_readonly) { return TRUE; }
CACTID_LOG_DEBUG(("DEBUG: MySQL Insert ID '%i': '%s'\n", queryid, query));
thread_mutex_lock(LOCK_MYSQL);
if (mysql_query(mysql, query)) {
CACTID_LOG(("ERROR: Problem with MySQL: '%s'\n", mysql_error(mysql)));
queryid++;
thread_mutex_unlock(LOCK_MYSQL);
return FALSE;
}else{
CACTID_LOG_DEBUG(("DEBUG: MySQL Insert ID '%i': OK\n", queryid));
queryid++;
thread_mutex_unlock(LOCK_MYSQL);
return TRUE;
}
}
/*! \fn MYSQL_RES *db_query(MYSQL *mysql, const char *query)
* \brief executes a query and returns a pointer to the result set.
* \param mysql the database connection object
* \param query the database query to execute
*
* This function will execute the SQL statement specified in the query variable.
*
* \return MYSQL_RES a MySQL result structure
*
*/
MYSQL_RES *db_query(MYSQL *mysql, const char *query) {
MYSQL_RES *mysql_res = 0;
int return_code;
int retries;
int error;
static int queryid = 0;
CACTID_LOG_DEBUG(("DEBUG: MySQL Query ID '%i': '%s'\n", queryid, query));
thread_mutex_lock(LOCK_MYSQL);
retries = 0;
error = FALSE;
while (retries < 3) {
return_code = mysql_query(mysql, query);
if (return_code) {
CACTID_LOG(("WARNING: MySQL Query Error, retrying query '%s'\n", query));
error = TRUE;
}else{
CACTID_LOG_DEBUG(("DEBUG: MySQL Query ID '%i': OK\n", queryid));
mysql_res = mysql_store_result(mysql);
error = FALSE;
break;
}
#ifndef SOLAR_THREAD
usleep(1000);
#endif
retries++;
}
queryid++;
thread_mutex_unlock(LOCK_MYSQL);
if (error) {
die("ERROR: Fatal MySQL Query Error, exiting\n");
}
return mysql_res;
}
/*! \fn void db_connect(char *database, MYSQL *mysql)
* \brief opens a connection to a MySQL databse.
* \param database a string pointer to the database name
* \param mysql a pointer to a mysql database connection object
*
* This function will attempt to open a connection to a MySQL database and then
* return the connection object to the calling function. If the database connection
* fails more than 20 times, the function will fail and Cactid will terminate.
*
*/
void db_connect(const char *database, MYSQL *mysql) {
MYSQL *db;
int tries;
int success;
char *hostname;
char *socket;
if ((hostname = strdup(set.dbhost)) == NULL) {
die("ERROR: malloc(): strdup() failed\n");
}
if ((socket = strstr(hostname,":"))) {
*socket++ = 0x0;
}
/* initialalize my variables */
tries = 20;
success = FALSE;
CACTID_LOG_DEBUG(("MYSQL: Connecting to MySQL database '%s' on '%s'...\n", database, set.dbhost));
thread_mutex_lock(LOCK_MYSQL);
db = mysql_init(mysql);
if (db == NULL) {
die("ERROR: MySQL unable to allocate memory and therefore can not connect\n");
}
while (tries > 0){
tries--;
if (!mysql_real_connect(mysql, hostname, set.dbuser, set.dbpass, database, set.dbport, socket, 0)) {
CACTID_LOG_DEBUG(("MYSQL: Connection Failed: %s\n", mysql_error(mysql)));
success = FALSE;
}else{
CACTID_LOG_DEBUG(("MYSQL: Connected to MySQL database '%s' on '%s'...\n", database, set.dbhost));
tries = 0;
success = TRUE;
}
#ifndef SOLAR_THREAD
usleep(2000);
#endif
}
free(hostname);
thread_mutex_unlock(LOCK_MYSQL);
if (!success){
die("MYSQL: Connection Failed: %s\n", mysql_error(mysql));
}
}
/*! \fn void db_disconnect(MYSQL *mysql)
* \brief closes connection to MySQL database
* \param mysql the database connection object
*
*/
void db_disconnect(MYSQL *mysql) {
mysql_close(mysql);
}
/*! \fn int append_hostrange(char *obuf, const char *colname, const config_t *set)
* \brief appends a host range to a sql select statement
* \param obuf the sql select statment to have the host range appended
* \param colname the sql column name that will have the host range checked
* \param set global runtime settings
*
* Several places in the code need to limit the range of hosts to
* those with a certain ID range, but only if those range values
* are actually nonzero.
*
* This appends the SQL clause if necessary, returning the # of
* characters added to the buffer. Else return 0.
*
* \return the number of characters added to the end of the character buffer
*
*/
int append_hostrange(char *obuf, const char *colname) {
if (HOSTID_DEFINED(set.start_host_id) && HOSTID_DEFINED(set.end_host_id)) {
return sprintf(obuf, " AND %s BETWEEN %d AND %d",
colname,
set.start_host_id,
set.end_host_id);
}else{
return 0;
}
}
|
