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-rw-r--r--system/database/drivers/mysql/mysql_driver.php376
1 files changed, 152 insertions, 224 deletions
diff --git a/system/database/drivers/mysql/mysql_driver.php b/system/database/drivers/mysql/mysql_driver.php
index 0f69a0723..cd1763751 100644
--- a/system/database/drivers/mysql/mysql_driver.php
+++ b/system/database/drivers/mysql/mysql_driver.php
@@ -1,13 +1,13 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.1.6 or newer
*
* NOTICE OF LICENSE
- *
+ *
* Licensed under the Open Software License version 3.0
- *
+ *
* This source file is subject to the Open Software License (OSL 3.0) that is
* bundled with this package in the files license.txt / license.rst. It is
* also available through the world wide web at this URL:
@@ -25,8 +25,6 @@
* @filesource
*/
-// ------------------------------------------------------------------------
-
/**
* MySQL Database Adapter Class
*
@@ -42,46 +40,47 @@
*/
class CI_DB_mysql_driver extends CI_DB {
- var $dbdriver = 'mysql';
+ public $dbdriver = 'mysql';
// The character used for escaping
- var $_escape_char = '`';
+ protected $_escape_char = '`';
// clause and character used for LIKE escape sequences - not used in MySQL
- var $_like_escape_str = '';
- var $_like_escape_chr = '';
-
- /**
- * Whether to use the MySQL "delete hack" which allows the number
- * of affected rows to be shown. Uses a preg_replace when enabled,
- * adding a bit more processing to all queries.
- */
- var $delete_hack = TRUE;
+ protected $_like_escape_str = '';
+ protected $_like_escape_chr = '';
/**
* The syntax to count rows is slightly different across different
* database engines, so this string appears in each driver and is
* used for the count_all() and count_all_results() functions.
*/
- var $_count_string = 'SELECT COUNT(*) AS ';
- var $_random_keyword = ' RAND()'; // database specific random keyword
-
- // whether SET NAMES must be used to set the character set
- var $use_set_names;
+ protected $_count_string = 'SELECT COUNT(*) AS ';
+ protected $_random_keyword = ' RAND()'; // database specific random keyword
/**
- * Non-persistent database connection
- *
- * @access private called by the base class
- * @return resource
+ * Whether to use the MySQL "delete hack" which allows the number
+ * of affected rows to be shown. Uses a preg_replace when enabled,
+ * adding a bit more processing to all queries.
*/
- function db_connect()
+ public $delete_hack = TRUE;
+
+ public function __construct($params)
{
+ parent::__construct($params);
+
if ($this->port != '')
{
$this->hostname .= ':'.$this->port;
}
+ }
+ /**
+ * Non-persistent database connection
+ *
+ * @return resource
+ */
+ public function db_connect()
+ {
return @mysql_connect($this->hostname, $this->username, $this->password, TRUE);
}
@@ -90,16 +89,10 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Persistent database connection
*
- * @access private called by the base class
* @return resource
*/
- function db_pconnect()
+ public function db_pconnect()
{
- if ($this->port != '')
- {
- $this->hostname .= ':'.$this->port;
- }
-
return @mysql_pconnect($this->hostname, $this->username, $this->password);
}
@@ -111,10 +104,9 @@ class CI_DB_mysql_driver extends CI_DB {
* Keep / reestablish the db connection if no queries have been
* sent for a length of time exceeding the server's idle timeout
*
- * @access public
* @return void
*/
- function reconnect()
+ public function reconnect()
{
if (mysql_ping($this->conn_id) === FALSE)
{
@@ -127,12 +119,23 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Select the database
*
- * @access private called by the base class
- * @return resource
+ * @param string database name
+ * @return bool
*/
- function db_select()
+ public function db_select($database = '')
{
- return @mysql_select_db($this->database, $this->conn_id);
+ if ($database === '')
+ {
+ $database = $this->database;
+ }
+
+ if (@mysql_select_db($database, $this->conn_id))
+ {
+ $this->database = $database;
+ return TRUE;
+ }
+
+ return FALSE;
}
// --------------------------------------------------------------------
@@ -140,12 +143,11 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Set client character set
*
- * @access public
* @param string
* @param string
- * @return resource
+ * @return bool
*/
- function db_set_charset($charset, $collation)
+ protected function _db_set_charset($charset, $collation)
{
return function_exists('mysql_set_charset')
? @mysql_set_charset($charset, $this->conn_id)
@@ -155,14 +157,15 @@ class CI_DB_mysql_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * Version number query string
+ * Database version number
*
- * @access public
* @return string
*/
- function _version()
+ public function version()
{
- return "SELECT version() AS ver";
+ return isset($this->data_cache['version'])
+ ? $this->data_cache['version']
+ : $this->data_cache['version'] = @mysql_get_server_info($this->conn_id);
}
// --------------------------------------------------------------------
@@ -170,14 +173,12 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Execute the query
*
- * @access private called by the base class
* @param string an SQL query
- * @return resource
+ * @return mixed
*/
- function _execute($sql)
+ protected function _execute($sql)
{
- $sql = $this->_prep_query($sql);
- return @mysql_query($sql, $this->conn_id);
+ return @mysql_query($this->_prep_query($sql), $this->conn_id);
}
// --------------------------------------------------------------------
@@ -187,20 +188,16 @@ class CI_DB_mysql_driver extends CI_DB {
*
* If needed, each database adapter can prep the query string
*
- * @access private called by execute()
* @param string an SQL query
* @return string
*/
- function _prep_query($sql)
+ protected function _prep_query($sql)
{
- // "DELETE FROM TABLE" returns 0 affected rows This hack modifies
- // the query so that it returns the number of affected rows
- if ($this->delete_hack === TRUE)
+ // mysql_affected_rows() returns 0 for "DELETE FROM TABLE" queries. This hack
+ // modifies the query so that it a proper number of affected rows is returned.
+ if ($this->delete_hack === TRUE && preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $sql))
{
- if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $sql))
- {
- $sql = preg_replace("/^\s*DELETE\s+FROM\s+(\S+)\s*$/", "DELETE FROM \\1 WHERE 1=1", $sql);
- }
+ return preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/', 'DELETE FROM \\1 WHERE 1=1', $sql);
}
return $sql;
@@ -211,18 +208,12 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Begin Transaction
*
- * @access public
* @return bool
*/
- function trans_begin($test_mode = FALSE)
+ public function trans_begin($test_mode = FALSE)
{
- if ( ! $this->trans_enabled)
- {
- return TRUE;
- }
-
// When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
{
return TRUE;
}
@@ -230,7 +221,7 @@ class CI_DB_mysql_driver extends CI_DB {
// Reset the transaction failure flag.
// If the $test_mode flag is set to TRUE transactions will be rolled back
// even if the queries produce a successful result.
- $this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE;
+ $this->_trans_failure = ($test_mode === TRUE);
$this->simple_query('SET AUTOCOMMIT=0');
$this->simple_query('START TRANSACTION'); // can also be BEGIN or BEGIN WORK
@@ -242,18 +233,12 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Commit Transaction
*
- * @access public
* @return bool
*/
- function trans_commit()
+ public function trans_commit()
{
- if ( ! $this->trans_enabled)
- {
- return TRUE;
- }
-
// When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
{
return TRUE;
}
@@ -268,18 +253,12 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Rollback Transaction
*
- * @access public
* @return bool
*/
- function trans_rollback()
+ public function trans_rollback()
{
- if ( ! $this->trans_enabled)
- {
- return TRUE;
- }
-
// When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
{
return TRUE;
}
@@ -294,12 +273,11 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Escape String
*
- * @access public
* @param string
* @param bool whether or not the string will be used in a LIKE condition
* @return string
*/
- function escape_str($str, $like = FALSE)
+ public function escape_str($str, $like = FALSE)
{
if (is_array($str))
{
@@ -311,7 +289,7 @@ class CI_DB_mysql_driver extends CI_DB {
return $str;
}
- if (function_exists('mysql_real_escape_string') AND is_resource($this->conn_id))
+ if (function_exists('mysql_real_escape_string') && is_resource($this->conn_id))
{
$str = mysql_real_escape_string($str, $this->conn_id);
}
@@ -327,7 +305,7 @@ class CI_DB_mysql_driver extends CI_DB {
// escape LIKE condition wildcards
if ($like === TRUE)
{
- $str = str_replace(array('%', '_'), array('\\%', '\\_'), $str);
+ return str_replace(array('%', '_'), array('\\%', '\\_'), $str);
}
return $str;
@@ -338,10 +316,9 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Affected Rows
*
- * @access public
- * @return integer
+ * @return int
*/
- function affected_rows()
+ public function affected_rows()
{
return @mysql_affected_rows($this->conn_id);
}
@@ -351,10 +328,9 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Insert ID
*
- * @access public
- * @return integer
+ * @return int
*/
- function insert_id()
+ public function insert_id()
{
return @mysql_insert_id($this->conn_id);
}
@@ -367,27 +343,25 @@ class CI_DB_mysql_driver extends CI_DB {
* Generates a platform-specific query string that counts all records in
* the specified database
*
- * @access public
* @param string
* @return string
*/
- function count_all($table = '')
+ public function count_all($table = '')
{
if ($table == '')
{
return 0;
}
- $query = $this->query($this->_count_string . $this->_protect_identifiers('numrows') . " FROM " . $this->_protect_identifiers($table, TRUE, NULL, FALSE));
-
+ $query = $this->query($this->_count_string.$this->protect_identifiers('numrows').' FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE));
if ($query->num_rows() == 0)
{
return 0;
}
- $row = $query->row();
+ $query = $query->row();
$this->_reset_select();
- return (int) $row->numrows;
+ return (int) $query->numrows;
}
// --------------------------------------------------------------------
@@ -397,17 +371,16 @@ class CI_DB_mysql_driver extends CI_DB {
*
* Generates a platform-specific query string so that the table names can be fetched
*
- * @access private
- * @param boolean
+ * @param bool
* @return string
*/
- function _list_tables($prefix_limit = FALSE)
+ protected function _list_tables($prefix_limit = FALSE)
{
- $sql = "SHOW TABLES FROM ".$this->_escape_char.$this->database.$this->_escape_char;
+ $sql = 'SHOW TABLES FROM '.$this->_escape_char.$this->database.$this->_escape_char;
- if ($prefix_limit !== FALSE AND $this->dbprefix != '')
+ if ($prefix_limit !== FALSE && $this->dbprefix != '')
{
- $sql .= " LIKE '".$this->escape_like_str($this->dbprefix)."%'";
+ return $sql." LIKE '".$this->escape_like_str($this->dbprefix)."%'";
}
return $sql;
@@ -420,55 +393,61 @@ class CI_DB_mysql_driver extends CI_DB {
*
* Generates a platform-specific query string so that the column names can be fetched
*
- * @access public
* @param string the table name
* @return string
*/
- function _list_columns($table = '')
+ public function _list_columns($table = '')
{
- return "SHOW COLUMNS FROM ".$this->_protect_identifiers($table, TRUE, NULL, FALSE);
+ return 'SHOW COLUMNS FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE);
}
// --------------------------------------------------------------------
/**
- * Field data query
+ * Returns an object with field data
*
- * Generates a platform-specific query so that the column data can be retrieved
- *
- * @access public
* @param string the table name
* @return object
*/
- function _field_data($table)
+ public function field_data($table = '')
{
- return "DESCRIBE ".$table;
- }
+ if ($table == '')
+ {
+ return ($this->db_debug) ? $this->display_error('db_field_param_missing') : FALSE;
+ }
- // --------------------------------------------------------------------
+ $query = $this->query('DESCRIBE '.$this->protect_identifiers($table, TRUE, NULL, FALSE));
+ $query = $query->result_object();
- /**
- * The error message string
- *
- * @access private
- * @return string
- */
- function _error_message()
- {
- return mysql_error($this->conn_id);
+ $retval = array();
+ for ($i = 0, $c = count($query); $i < $c; $i++)
+ {
+ preg_match('/([a-z]+)(\(\d+\))?/', $query[$i]->Type, $matches);
+
+ $retval[$i] = new stdClass();
+ $retval[$i]->name = $query[$i]->Field;
+ $retval[$i]->type = empty($matches[1]) ? NULL : $matches[1];
+ $retval[$i]->default = $query[$i]->Default;
+ $retval[$i]->max_length = empty($matches[2]) ? NULL : preg_replace('/[^\d]/', '', $matches[2]);
+ $retval[$i]->primary_key = (int) ($query[$i]->Key === 'PRI');
+ }
+
+ return $retval;
}
// --------------------------------------------------------------------
/**
- * The error message number
+ * Error
+ *
+ * Returns an array containing code and message of the last
+ * database error that has occured.
*
- * @access private
- * @return integer
+ * @return array
*/
- function _error_number()
+ public function error()
{
- return mysql_errno($this->conn_id);
+ return array('code' => mysql_errno($this->conn_id), 'message' => mysql_error($this->conn_id));
}
// --------------------------------------------------------------------
@@ -478,11 +457,10 @@ class CI_DB_mysql_driver extends CI_DB {
*
* This function escapes column and table names
*
- * @access private
* @param string
* @return string
*/
- function _escape_identifiers($item)
+ public function _escape_identifiers($item)
{
if ($this->_escape_char == '')
{
@@ -493,24 +471,20 @@ class CI_DB_mysql_driver extends CI_DB {
{
if (strpos($item, '.'.$id) !== FALSE)
{
- $str = $this->_escape_char. str_replace('.', $this->_escape_char.'.', $item);
+ $item = str_replace('.', $this->_escape_char.'.', $item);
// remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
+ return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item);
}
}
if (strpos($item, '.') !== FALSE)
{
- $str = $this->_escape_char.str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item).$this->_escape_char;
- }
- else
- {
- $str = $this->_escape_char.$item.$this->_escape_char;
+ $item = str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item);
}
// remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
+ return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $this->_escape_char.$item.$this->_escape_char);
}
// --------------------------------------------------------------------
@@ -521,11 +495,10 @@ class CI_DB_mysql_driver extends CI_DB {
* This function implicitly groups FROM tables so there is no confusion
* about operator precedence in harmony with SQL standards
*
- * @access public
- * @param type
- * @return type
+ * @param string table name
+ * @return string
*/
- function _from_tables($tables)
+ protected function _from_tables($tables)
{
if ( ! is_array($tables))
{
@@ -542,15 +515,14 @@ class CI_DB_mysql_driver extends CI_DB {
*
* Generates a platform-specific insert string from the supplied data
*
- * @access public
* @param string the table name
* @param array the insert keys
* @param array the insert values
* @return string
*/
- function _insert($table, $keys, $values)
+ protected function _insert($table, $keys, $values)
{
- return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
+ return 'INSERT INTO '.$table.' ('.implode(', ', $keys).') VALUES ('.implode(', ', $values).')';
}
// --------------------------------------------------------------------
@@ -561,15 +533,14 @@ class CI_DB_mysql_driver extends CI_DB {
*
* Generates a platform-specific replace string from the supplied data
*
- * @access public
* @param string the table name
* @param array the insert keys
* @param array the insert values
* @return string
*/
- function _replace($table, $keys, $values)
+ protected function _replace($table, $keys, $values)
{
- return "REPLACE INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
+ return 'REPLACE INTO '.$table.' ('.implode(', ', $keys).') VALUES ('.implode(', ', $values).')';
}
// --------------------------------------------------------------------
@@ -579,15 +550,14 @@ class CI_DB_mysql_driver extends CI_DB {
*
* Generates a platform-specific insert string from the supplied data
*
- * @access public
* @param string the table name
* @param array the insert keys
* @param array the insert values
* @return string
*/
- function _insert_batch($table, $keys, $values)
+ protected function _insert_batch($table, $keys, $values)
{
- return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES ".implode(', ', $values);
+ return 'INSERT INTO '.$table.' ('.implode(', ', $keys).') VALUES '.implode(', ', $values);
}
// --------------------------------------------------------------------
@@ -598,7 +568,6 @@ class CI_DB_mysql_driver extends CI_DB {
*
* Generates a platform-specific update string from the supplied data
*
- * @access public
* @param string the table name
* @param array the update data
* @param array the where clause
@@ -606,34 +575,22 @@ class CI_DB_mysql_driver extends CI_DB {
* @param array the limit clause
* @return string
*/
- function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
+ protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array())
{
foreach ($values as $key => $val)
{
- $valstr[] = $key . ' = ' . $val;
+ $valstr[] = $key.' = '.$val;
}
- $limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
- $orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):'';
-
- $sql = "UPDATE ".$table." SET ".implode(', ', $valstr);
-
- $sql .= ($where != '' AND count($where) >=1) ? " WHERE ".implode(" ", $where) : '';
-
- if (count($like) > 0)
+ $where = ($where != '' && count($where) > 0) ? ' WHERE '.implode(' ', $where) : '';
+ if (count($like) > 0)
{
- $sql .= ($where == '' AND count($where) <1) ? " WHERE " : ' AND ';
-
- foreach ($like as $st_like)
- {
- $sql .= " " . $st_like;
- }
+ $where .= ($where == '' ? ' WHERE ' : ' AND ').implode(' ', $like);
}
- $sql .= $orderby.$limit;
-
- return $sql;
+ return 'UPDATE '.$table.' SET '.implode(', ', $valstr).$where
+ .(count($orderby) > 0 ? ' ORDER BY '.implode(', ', $orderby) : '')
+ .( ! $limit ? '' : ' LIMIT '.$limit);
}
// --------------------------------------------------------------------
@@ -644,17 +601,14 @@ class CI_DB_mysql_driver extends CI_DB {
*
* Generates a platform-specific batch update string from the supplied data
*
- * @access public
* @param string the table name
* @param array the update data
* @param array the where clause
* @return string
*/
- function _update_batch($table, $values, $index, $where = NULL)
+ protected function _update_batch($table, $values, $index, $where = NULL)
{
$ids = array();
- $where = ($where != '' AND count($where) >=1) ? implode(" ", $where).' AND ' : '';
-
foreach ($values as $key => $val)
{
$ids[] = $val[$index];
@@ -668,30 +622,21 @@ class CI_DB_mysql_driver extends CI_DB {
}
}
- $sql = "UPDATE ".$table." SET ";
$cases = '';
-
foreach ($final as $k => $v)
{
- $cases .= $k.' = CASE '."\n";
- foreach ($v as $row)
- {
- $cases .= $row."\n";
- }
-
- $cases .= 'ELSE '.$k.' END, ';
+ $cases .= $k." = CASE \n"
+ .implode("\n", $v)."\n"
+ .'ELSE '.$k.' END, ';
}
- $sql .= substr($cases, 0, -2);
-
- $sql .= ' WHERE '.$where.$index.' IN ('.implode(',', $ids).')';
-
- return $sql;
+ return 'UPDATE '.$table.' SET '.substr($cases, 0, -2)
+ .' WHERE '.(($where != '' && count($where) > 0) ? implode(' ', $where).' AND ' : '')
+ .$index.' IN('.implode(',', $ids).')';
}
// --------------------------------------------------------------------
-
/**
* Truncate statement
*
@@ -699,13 +644,12 @@ class CI_DB_mysql_driver extends CI_DB {
* If the database does not support the truncate() command
* This function maps to "DELETE FROM table"
*
- * @access public
* @param string the table name
* @return string
*/
- function _truncate($table)
+ protected function _truncate($table)
{
- return "TRUNCATE ".$table;
+ return 'TRUNCATE '.$table;
}
// --------------------------------------------------------------------
@@ -715,31 +659,27 @@ class CI_DB_mysql_driver extends CI_DB {
*
* Generates a platform-specific delete string from the supplied data
*
- * @access public
* @param string the table name
* @param array the where clause
* @param string the limit clause
* @return string
*/
- function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+ protected function _delete($table, $where = array(), $like = array(), $limit = FALSE)
{
$conditions = '';
if (count($where) > 0 OR count($like) > 0)
{
- $conditions = "\nWHERE ";
- $conditions .= implode("\n", $this->ar_where);
+ $conditions = "\nWHERE ".implode("\n", $this->ar_where);
if (count($where) > 0 && count($like) > 0)
{
- $conditions .= " AND ";
+ $conditions .= ' AND ';
}
$conditions .= implode("\n", $like);
}
- $limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
- return "DELETE FROM ".$table.$conditions.$limit;
+ return 'DELETE FROM '.$table.$conditions.( ! $limit ? '' : ' LIMIT '.$limit);
}
// --------------------------------------------------------------------
@@ -749,24 +689,14 @@ class CI_DB_mysql_driver extends CI_DB {
*
* Generates a platform-specific LIMIT clause
*
- * @access public
* @param string the sql query string
- * @param integer the number of rows to limit the query to
- * @param integer the offset value
+ * @param int the number of rows to limit the query to
+ * @param int the offset value
* @return string
*/
- function _limit($sql, $limit, $offset)
+ protected function _limit($sql, $limit, $offset)
{
- if ($offset == 0)
- {
- $offset = '';
- }
- else
- {
- $offset .= ", ";
- }
-
- return $sql."LIMIT ".$offset.$limit;
+ return $sql.' LIMIT '.($offset == 0 ? '' : $offset.', ').$limit;
}
// --------------------------------------------------------------------
@@ -774,17 +704,15 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Close DB Connection
*
- * @access public
* @param resource
* @return void
*/
- function _close($conn_id)
+ protected function _close($conn_id)
{
@mysql_close($conn_id);
}
}
-
/* End of file mysql_driver.php */
-/* Location: ./system/database/drivers/mysql/mysql_driver.php */ \ No newline at end of file
+/* Location: ./system/database/drivers/mysql/mysql_driver.php */
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-11-10 05:41:53 +0100