curl_xml: fix 3 small memory leaks

[collectd.git] / src / mysql.c

diff --git a/src/mysql.c b/src/mysql.c
index 1048511..f93a442 100644 (file)
--- a/src/mysql.c
+++ b/src/mysql.c
@@ -59,7 +59,7 @@ struct mysql_database_s /* {{{ */
        int   slave_sql_running;
 
        MYSQL *con;
-       int    state;
+       _Bool  is_connected;
 };
 typedef struct mysql_database_s mysql_database_t; /* }}} */
 
@@ -342,7 +342,8 @@ static int mysql_config (oconfig_item_t *ci) /* {{{ */
                else
                        sstrncpy (cb_name, "mysql", sizeof (cb_name));
 
-               plugin_register_complex_read (cb_name, mysql_read,
+               plugin_register_complex_read (/* group = */ NULL, cb_name,
+                                             mysql_read,
                                              /* interval = */ NULL, &ud);
        }
        else
@@ -358,30 +359,31 @@ static int mysql_config (oconfig_item_t *ci) /* {{{ */
 
 static MYSQL *getconnection (mysql_database_t *db)
 {
-       if (db->state != 0)
+       if (db->is_connected)
        {
-               int err;
-               if ((err = mysql_ping (db->con)) != 0)
-               {
-                       WARNING ("mysql_ping failed for %s: %s",
-                                       (db->instance != NULL)
-                                       ? db->instance
-                                       : "<legacy>",
-                                       mysql_error (db->con));
-                       db->state = 0;
-               }
-               else
-               {
-                       db->state = 1;
+               int status;
+
+               status = mysql_ping (db->con);
+               if (status == 0)
                        return (db->con);
-               }
+
+               WARNING ("mysql plugin: Lost connection to instance \"%s\": %s",
+                               (db->instance != NULL)
+                               ? db->instance
+                               : "<legacy>",
+                               mysql_error (db->con));
        }
+       db->is_connected = 0;
 
-       if ((db->con = mysql_init (db->con)) == NULL)
+       if (db->con == NULL)
        {
-               ERROR ("mysql_init failed: %s", mysql_error (db->con));
-               db->state = 0;
-               return (NULL);
+               db->con = mysql_init (NULL);
+               if (db->con == NULL)
+               {
+                       ERROR ("mysql plugin: mysql_init failed: %s",
+                                       mysql_error (db->con));
+                       return (NULL);
+               }
        }
 
        if (mysql_real_connect (db->con, db->host, db->user, db->pass,
@@ -392,20 +394,18 @@ static MYSQL *getconnection (mysql_database_t *db)
                                (db->database != NULL) ? db->database : "<none>",
                                (db->host != NULL) ? db->host : "localhost",
                                mysql_error (db->con));
-               db->state = 0;
                return (NULL);
        }
-       else
-       {
-               INFO ("mysql plugin: Sucessfully connected to database %s "
-                               "at server %s (server version: %s, protocol version: %d)",
-                               (db->database != NULL) ? db->database : "<none>",
-                               mysql_get_host_info (db->con),
-                               mysql_get_server_info (db->con),
-                               mysql_get_proto_info (db->con));
-               db->state = 1;
-               return (db->con);
-       }
+
+       INFO ("mysql plugin: Successfully connected to database %s "
+                       "at server %s (server version: %s, protocol version: %d)",
+                       (db->database != NULL) ? db->database : "<none>",
+                       mysql_get_host_info (db->con),
+                       mysql_get_server_info (db->con),
+                       mysql_get_proto_info (db->con));
+
+       db->is_connected = 1;
+       return (db->con);
 } /* static MYSQL *getconnection (mysql_database_t *db) */
 
 static void set_host (mysql_database_t *db, char *buf, size_t buflen)
@@ -556,6 +556,7 @@ static int mysql_read_master_stats (mysql_database_t *db, MYSQL *con)
        {
                ERROR ("mysql plugin: Failed to get master statistics: "
                                "`%s' did not return any rows.", query);
+               mysql_free_result (res);
                return (-1);
        }
 
@@ -564,6 +565,7 @@ static int mysql_read_master_stats (mysql_database_t *db, MYSQL *con)
        {
                ERROR ("mysql plugin: Failed to get master statistics: "
                                "`%s' returned less than two columns.", query);
+               mysql_free_result (res);
                return (-1);
        }
 
@@ -607,6 +609,7 @@ static int mysql_read_slave_stats (mysql_database_t *db, MYSQL *con)
        {
                ERROR ("mysql plugin: Failed to get slave statistics: "
                                "`%s' did not return any rows.", query);
+               mysql_free_result (res);
                return (-1);
        }
 
@@ -615,6 +618,7 @@ static int mysql_read_slave_stats (mysql_database_t *db, MYSQL *con)
        {
                ERROR ("mysql plugin: Failed to get slave statistics: "
                                "`%s' returned less than 33 columns.", query);
+               mysql_free_result (res);
                return (-1);
        }
 
@@ -685,7 +689,7 @@ static int mysql_read_slave_stats (mysql_database_t *db, MYSQL *con)
                        ssnprintf (n.message, sizeof (n.message),
                                        "slave SQL thread started");
                        plugin_dispatch_notification (&n);
-                       db->slave_sql_running = 0;
+                       db->slave_sql_running = 1;
                }
        }
 
@@ -706,7 +710,6 @@ static int mysql_read (user_data_t *ud)
        MYSQL_RES *res;
        MYSQL_ROW  row;
        char      *query;
-       int        field_num;
 
        unsigned long long qcache_hits          = 0ULL;
        unsigned long long qcache_inserts       = 0ULL;
@@ -742,7 +745,6 @@ static int mysql_read (user_data_t *ud)
        if (res == NULL)
                return (-1);
 
-       field_num = mysql_num_fields (res);
        while ((row = mysql_fetch_row (res)))
        {
                char *key;