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<?php
// $Id: daemon.php,v 1.2 2005/02/26 14:48:58 chagenbu Exp $
/**
* The Log_daemon class is a concrete implementation of the Log::
* abstract class which sends messages to syslog daemon on UNIX-like machines.
* This class uses the syslog protocol: http://www.ietf.org/rfc/rfc3164.txt
*
* @author Bart van der Schans <schans@dds.nl>
* @version $Revision: 1.2 $
* @package Log
*/
class Log_daemon extends Log
{
/**
* Integer holding the log facility to use.
* @var string
*/
var $_name = LOG_DAEMON;
/**
* Var holding the resource pointer to the socket
* @var resource
*/
var $_socket;
/**
* The ip address or servername
* @see http://www.php.net/manual/en/transports.php
* @var string
*/
var $_ip = '127.0.0.1';
/**
* Protocol to use (tcp, udp, etc.)
* @see http://www.php.net/manual/en/transports.php
* @var string
*/
var $_proto = 'udp';
/**
* Port to connect to
* @var int
*/
var $_port = 514;
/**
* Maximum message length in bytes
* @var int
*/
var $_maxsize = 4096;
/**
* Socket timeout in seconds
* @var int
*/
var $_timeout = 1;
/**
* Constructs a new syslog object.
*
* @param string $name The syslog facility.
* @param string $ident The identity string.
* @param array $conf The configuration array.
* @param int $maxLevel Maximum level at which to log.
* @access public
*/
function Log_daemon($name, $ident = '', $conf = array(),
$level = PEAR_LOG_DEBUG)
{
/* Ensure we have a valid integer value for $name. */
if (empty($name) || !is_int($name)) {
$name = LOG_SYSLOG;
}
$this->_id = md5(microtime());
$this->_name = $name;
$this->_ident = $ident;
$this->_mask = Log::UPTO($level);
if (isset($conf['ip'])) {
$this->_ip = $conf['ip'];
}
if (isset($conf['proto'])) {
$this->_proto = $conf['proto'];
}
if (isset($conf['port'])) {
$this->_port = $conf['port'];
}
if (isset($conf['maxsize'])) {
$this->_maxsize = $conf['maxsize'];
}
if (isset($conf['timeout'])) {
$this->_timeout = $conf['timeout'];
}
$this->_proto = $this->_proto . '://';
register_shutdown_function(array(&$this, '_Log_daemon'));
}
/**
* Destructor.
*
* @access private
*/
function _Log_daemon()
{
$this->close();
}
/**
* Opens a connection to the system logger, if it has not already
* been opened. This is implicitly called by log(), if necessary.
* @access public
*/
function open()
{
if (!$this->_opened) {
$this->_opened = (bool)($this->_socket = @fsockopen(
$this->_proto . $this->_ip,
$this->_port,
$errno,
$errstr,
$this->_timeout));
}
return $this->_opened;
}
/**
* Closes the connection to the system logger, if it is open.
* @access public
*/
function close()
{
if ($this->_opened) {
$this->_opened = false;
return fclose($this->_socket);
}
return true;
}
/**
* Sends $message to the currently open syslog connection. Calls
* open() if necessary. Also passes the message along to any Log_observer
* instances that are observing this Log.
*
* @param string $message The textual message to be logged.
* @param int $priority (optional) The priority of the message. Valid
* values are: LOG_EMERG, LOG_ALERT, LOG_CRIT,
* LOG_ERR, LOG_WARNING, LOG_NOTICE, LOG_INFO,
* and LOG_DEBUG. The default is LOG_INFO.
* @access public
*/
function log($message, $priority = null)
{
/* If a priority hasn't been specified, use the default value. */
if ($priority === null) {
$priority = $this->_priority;
}
/* Abort early if the priority is above the maximum logging level. */
if (!$this->_isMasked($priority)) {
return false;
}
/* If the connection isn't open and can't be opened, return failure. */
if (!$this->_opened && !$this->open()) {
return false;
}
/* Extract the string representation of the message. */
$message = $this->_extractMessage($message);
/* Set the facility level. */
$facility_level = intval($this->_name) +
intval($this->_toSyslog($priority));
/* Prepend ident info. */
if (!empty($this->_ident)) {
$message = $this->_ident . ' ' . $message;
}
/* Check for message length. */
if (strlen($message) > $this->_maxsize) {
$message = substr($message, 0, ($this->_maxsize) - 10) . ' [...]';
}
/* Write to socket. */
fwrite($this->_socket, '<' . $facility_level . '>' . $message . "\n");
$this->_announce(array('priority' => $priority, 'message' => $message));
}
/**
* Converts a PEAR_LOG_* constant into a syslog LOG_* constant.
*
* This function exists because, under Windows, not all of the LOG_*
* constants have unique values. Instead, the PEAR_LOG_* were introduced
* for global use, with the conversion to the LOG_* constants kept local to
* to the syslog driver.
*
* @param int $priority PEAR_LOG_* value to convert to LOG_* value.
*
* @return The LOG_* representation of $priority.
*
* @access private
*/
function _toSyslog($priority)
{
static $priorities = array(
PEAR_LOG_EMERG => LOG_EMERG,
PEAR_LOG_ALERT => LOG_ALERT,
PEAR_LOG_CRIT => LOG_CRIT,
PEAR_LOG_ERR => LOG_ERR,
PEAR_LOG_WARNING => LOG_WARNING,
PEAR_LOG_NOTICE => LOG_NOTICE,
PEAR_LOG_INFO => LOG_INFO,
PEAR_LOG_DEBUG => LOG_DEBUG
);
/* If we're passed an unknown priority, default to LOG_INFO. */
if (!is_int($priority) || !in_array($priority, $priorities)) {
return LOG_INFO;
}
return $priorities[$priority];
}
}
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