/**
* Simple tail program using the inotify extension
* Usage: ./tail.php file
*/
function main_loop($file, $file_fd)
{
$inotify = inotify_init();
if ($inotify === false) {
fprintf(STDERR, "Failed to obtain an inotify instance\n");
return 1;
}
$watch = inotify_add_watch($inotify, $file, IN_MODIFY);
if ($watch === false) {
fprintf(STDERR, "Failed to watch file '%s'", $file);
return 1;
}
while (($events = inotify_read($inotify)) !== false) {
echo "Event received !\n";
foreach ($events as $event) {
if (!($event['mask'] & IN_MODIFY)) {
continue;
}
echo stream_get_contents($file_fd);
break;
}
}
// May not happen
inotify_rm_watch($inotify, $watch);
fclose($inotify);
fclose($file_fd);
return 0;
}
function tail($file, &$pos)
{
// get the size of the file
if (!$pos) {
$pos = filesize($file);
}
// Open an inotify instance
$fd = inotify_init();
// Watch $file for changes.
$watch_descriptor = inotify_add_watch($fd, $file, IN_ALL_EVENTS);
// Loop forever (breaks are below)
while (true) {
// Read events (inotify_read is blocking!)
$events = inotify_read($fd);
// Loop though the events which occured
foreach ($events as $event => $evdetails) {
// React on the event type
switch (true) {
// File was modified
case $evdetails['mask'] & IN_MODIFY:
// Stop watching $file for changes
inotify_rm_watch($fd, $watch_descriptor);
// Close the inotify instance
fclose($fd);
// open the file
$fp = fopen($file, 'r');
if (!$fp) {
return false;
}
// seek to the last EOF position
fseek($fp, $pos);
// read until EOF
while (!feof($fp)) {
$buf .= fread($fp, 8192);
}
// save the new EOF to $pos
$pos = ftell($fp);
// (remember: $pos is called by reference)
// close the file pointer
fclose($fp);
// return the new data and leave the function
return $buf;
break;
// File was moved or deleted
// File was moved or deleted
case $evdetails['mask'] & IN_MOVE:
case $evdetails['mask'] & IN_MOVE_SELF:
case $evdetails['mask'] & IN_DELETE:
case $evdetails['mask'] & IN_DELETE_SELF:
// Stop watching $file for changes
inotify_rm_watch($fd, $watch_descriptor);
// Close the inotify instance
fclose($fd);
// Return a failure
return false;
break;
}
}
}
}
/**
* Clear all watching.
*
* @return void
*/
public function clearWatch()
{
foreach ($this->watchDir as $wd) {
inotify_rm_watch($this->inotify, $wd);
}
$this->watchDir = [];
}
public function start()
{
$this->stop = false;
$fd = inotify_init();
$wd = inotify_add_watch($fd, $this->path, IN_ALL_EVENTS);
$read = [$fd];
$write = null;
$except = null;
stream_select($read, $write, $except, 0);
stream_set_blocking($fd, 0);
while (true) {
if ($this->stop) {
inotify_rm_watch($fd, $wd);
return fclose($fd);
}
if ($events = inotify_read($fd)) {
foreach ($events as $details) {
if ($details['name']) {
$target = rtrim($this->path, '/') . '/' . $details['name'];
} else {
$target = $this->path;
}
$file = new \SplFileInfo($target);
switch (true) {
case $details['mask'] & IN_MODIFY:
$this->modify($file);
break;
}
$this->all($file);
}
}
}
}
/**
* remove/cancel the given watch identifier previously aquired via add()
* i.e. stop watching the associated path
*
* @param integer $descriptor watch identifier previously returned from add()
*/
public function remove($descriptor)
{
if (isset($this->watchDescriptors[$descriptor])) {
unset($this->watchDescriptors[$descriptor]);
if ($this->watchDescriptors) {
// there are still watch paths remaining => only remove this descriptor
\inotify_rm_watch($this->inotifyHandler, $descriptor);
} else {
// no more paths watched => close whole handler
$this->close();
}
}
}
function deleteFiles()
{
$tmps = scandir($this->path);
foreach ($this->filenames as $file) {
if (!in_array($file, $tmps)) {
unset($this->filenames[$file]);
inotify_rm_watch($this->ifds[$file], $this->wds[$file]);
unset($this->ifds[$file]);
unset($this->wds[$file]);
fclose($this->fds[$file]);
unset($this->fds[$file]);
unset($this->pos[$file]);
}
}
}
/**
* Cancels your subscription on object in FS
* @param string $path Path
* @param mixed $cb Callback
* @return boolean
*/
public function rmWatch($path, $cb)
{
$path = realpath($path);
if (!isset($this->files[$path])) {
return false;
}
if (($k = array_search($cb, $this->files[$path], true)) !== false) {
unset($this->files[$path][$k]);
}
if (sizeof($this->files[$path]) === 0) {
if ($this->inotify) {
if (($descriptor = array_search($path, $this->descriptors)) !== false) {
inotify_rm_watch($this->inotify, $cb);
}
}
unset($this->files[$path]);
}
return true;
}
<?php // Open an inotify instance $fd = inotify_init(); // Watch __FILE__ for metadata changes (e.g. mtime) $watch_descriptor = inotify_add_watch($fd, __FILE__, IN_ATTRIB); // generate an event touch(__FILE__); // Read events $events = inotify_read($fd); print_r($events); // The following methods allows to use inotify functions without blocking on inotify_read(): // - Using stream_select() on $fd: $read = array($fd); $write = null; $except = null; stream_select($read, $write, $except, 0); // - Using stream_set_blocking() on $fd stream_set_blocking($fd, 0); inotify_read($fd); // Does no block, and return false if no events are pending // - Using inotify_queue_len() to check if event queue is not empty $queue_len = inotify_queue_len($fd); // If > 0, inotify_read() will not block // Stop watching __FILE__ for metadata changes inotify_rm_watch($fd, $watch_descriptor); // Close the inotify instance // This may have closed all watches if this was not already done fclose($fd);
/**
* Unwatch resource
*
* @param int $id Watch descriptor
*/
protected function unwatch($id)
{
@inotify_rm_watch($this->bag->getInotify(), $id);
}
/**
* 删除某个文件的监控
* @param string $file
*/
public static function delFile($file)
{
return inotify_rm_watch(self::$inotifyFd, $file);
}
/**
* Monitor the paths for any changes based on the modify time information.
* When a change is detected, all listeners are invoked, and the list of
* paths is once again traversed to acquire updated modification timestamps.
*/
private function watchInotify()
{
if (($eventList = inotify_read($this->inotify)) === false) {
return;
}
foreach ($eventList as $event) {
$mask = $event['mask'];
if ($mask & IN_DELETE_SELF || $mask & IN_MOVE_SELF) {
$watchDescriptor = $event['wd'];
if (inotify_rm_watch($this->inotify, $watchDescriptor)) {
unset($this->paths[$watchDescriptor]);
}
break;
}
}
$this->runListeners();
}
private function shutdownInotify($inotify, array $watches)
{
foreach ($watches as $watch) {
/** @noinspection PhpUndefinedFunctionInspection */
inotify_rm_watch($inotify, $watch);
}
fclose($inotify);
}
function deleteDir($dirname)
{
$path = $this->path . '/' . $dirname;
if (in_array($path, $this->dirs)) {
unset($this->dirs[$path]);
inotify_rm_watch($this->ifds[$path], $this->wds[$path]);
unset($this->ifds[$path]);
unset($this->wds[$path]);
}
}
/**
* 清理所有inotify监听
*/
function clearWatch()
{
foreach ($this->watchFiles as $wd) {
inotify_rm_watch($this->inotify, $wd);
}
$this->watchFiles = array();
}
public function unwatch(TrackedObject $tracked)
{
if ($tracked->getResource()->isExists()) {
return;
}
@inotify_rm_watch($this->inotify, $tracked->getID());
unset($this->inotifyMap[$tracked->getID()]);
return parent::unwatch($tracked);
}
/**
* 监控日志文件
*
* @param array $logPaths
* @return void
* @throws ZtChart_Model_Monitor_Exception
*/
public function tail($logPaths)
{
if (($inotify = inotify_init()) === false) {
throw new ZtChart_Model_Monitor_Daemon_Exception('Failed to obtain an inotify instance.');
}
$watchFiles = $watchDirs = array();
foreach ($logPaths as $file) {
if (($watch = inotify_add_watch($inotify, $file, IN_CREATE | IN_MODIFY)) === false) {
throw new ZtChart_Model_Monitor_Daemon_Exception("Failed to watch file '{$file}'.");
}
if (is_file($file)) {
if (false === ($fd = fopen($file, "r"))) {
throw new ZtChart_Model_Monitor_Daemon_Exception("File '{$file}' is not readable.");
}
$this->_ffseek($fd);
$watchFiles[$watch] = $fd;
} else {
if (is_dir($file)) {
$watchFiles[$watch] = array();
$watchDirs[$watch] = $file;
}
}
}
while (($events = inotify_read($inotify)) !== false) {
foreach ($events as $event) {
if ($event['mask'] & IN_Q_OVERFLOW) {
throw new ZtChart_Model_Monitor_Daemon_Exception("The number of inotify queued events reaches upper limit.");
}
if (!$this->accept($event['name'])) {
continue;
}
if ($event['mask'] & (IN_CREATE | IN_MODIFY)) {
if (!($event['mask'] & IN_ISDIR)) {
if (!array_key_exists($event['name'], $watchFiles[$event['wd']])) {
$fn = $fd = null;
foreach ($watchFiles[$event['wd']] as $wfn => $wfd) {
if (strncasecmp($wfn, $event['name'], strpos($wfn, '.')) == 0) {
$fn = $wfn;
$fd = $wfd;
break;
}
}
// 判断当前创建或修改的日志文件是否最新
if (strcasecmp($fn, $event['name']) < 0) {
if (is_resource($fd) && fclose($fd)) {
unset($watchFiles[$event['wd']][$fn]);
}
$filename = $watchDirs[$event['wd']] . DIRECTORY_SEPARATOR . $event['name'];
if (false === ($fd = fopen($filename, "r"))) {
$this->_logger->err("File '{$filename}' is not readable\n");
continue;
}
if ($event['mask'] & IN_MODIFY) {
$this->_ffseek($fd);
}
$watchFiles[$event['wd']][$event['name']] = $fd;
} else {
// 如果不是最新的日志文件（重写的上一个小时的日志文件），则不处理。
continue;
}
} else {
$fd = $watchFiles[$event['wd']][$event['name']];
}
} else {
continue;
// $fd = $watchFiles[$event['wd']];
}
// 读取日志并分析
$raw = '';
$lines = 0;
while (true) {
$raw .= $block = fread($fd, 4096);
if (false !== ($pos = strpos($raw, "\n"))) {
$rawline = substr($raw, 0, $pos + 1);
try {
$mlog = new ZtChart_Model_Monitor_Log($rawline);
$line = $mlog->transform();
if (!empty($line)) {
$this->_shmWrite($mlog->getShmIdentifier(), $line);
$lines++;
}
} catch (ZtChart_Model_Monitor_Log_Exception $e) {
$this->_logger->warn("日志处理错误：" . iconv('GBK', 'UTF-8', $rawline));
}
$raw = substr($raw, $pos + 1);
} else {
if (($offset = strlen($block)) > 0) {
fseek($fd, -$offset, SEEK_CUR);
}
break;
}
}
if (0 != $lines) {
$this->_logger->info(sprintf("%4s行有效数据已处理：%s", $lines, $watchDirs[$event['wd']] . '/' . $event['name']));
}
}
}
}
foreach ($watchFiles as $watch => $fd) {
if (is_resource($fd)) {
$fd = (array) $fd;
}
array_walk($fd, 'fclose');
inotify_rm_watch($inotify, $watch);
}
fclose($inotify);
}
public function del($resource)
{
return inotify_rm_watch($this->inotify, $resource);
}
public function start()
{
$paths = $this->_paths;
if ($this->_followLinks) {
$paths = LinksHelper::followLinks($paths, $this->_excludePatterns);
}
$this->_fd = inotify_init();
$finder = new Finder();
$finder->directories();
foreach ($this->_excludePatterns as $excludePattern) {
$finder->notName($excludePattern);
}
foreach ($paths as $p) {
$finder->in($p);
}
$this->_watches = array();
foreach ($paths as $p) {
$this->_addWatch($p);
}
foreach ($finder as $f) {
$this->_addWatch($f->__toString());
}
$this->_logger->info("Watches set up...");
$read = array($this->_fd);
$write = null;
$except = null;
stream_select($read, $write, $except, 0);
stream_set_blocking($this->_fd, 0);
$events = array();
while (!$this->_stopped) {
while ($inotifyEvents = inotify_read($this->_fd)) {
foreach ($inotifyEvents as $details) {
$file = $this->_watches[$details['wd']];
if ($details['name']) {
$file .= '/' . $details['name'];
}
if ($details['mask'] & IN_MODIFY || $details['mask'] & IN_ATTRIB) {
$events[] = new ModifyEvent($file);
}
if ($details['mask'] & IN_CREATE) {
$events[] = new CreateEvent($file);
}
if ($details['mask'] & IN_DELETE) {
$events[] = new DeleteEvent($file);
}
if ($details['mask'] & IN_MOVED_FROM) {
$this->_previousMoveFromFile = $file;
}
if ($details['mask'] & IN_MOVED_TO) {
if (!isset($this->_previousMoveFromFile)) {
$this->_logger->error('MOVED_FROM event is not followed by a MOVED_TO');
} else {
$events[] = new MoveEvent($this->_previousMoveFromFile, $file);
unset($this->_previousMoveFromFile);
}
}
if ($details['mask'] & IN_DELETE_SELF) {
unset($this->_watches[$details['wd']]);
}
}
}
$events = $this->_compressEvents($events);
if ($this->_queueSizeLimit && count($events) > $this->_queueSizeLimit) {
$this->_dispatchEvent(QueueFullEvent::NAME, new QueueFullEvent($events));
$events = array();
}
foreach ($events as $event) {
$name = call_user_func(array(get_class($event), 'getEventName'));
$this->_dispatchEvent($name, $event);
}
usleep(100 * 1000);
}
foreach ($this->_watches as $wd => $path) {
inotify_rm_watch($this->_fd, (int) $wd);
}
fclose($this->_fd);
return;
}
