PHP 7.3.14 Released

inotify_read

(PECL inotify >= 0.1.2)

inotify_readinotify インスタンスからイベントを読み込む

説明

inotify_read ( resource $inotify_instance ) : array

inotify イベントを inotify インスタンスから読み込みます。

パラメータ

inotify_instance

inotify_init() が返すリソース

返り値

inotify イベントの配列、を返します。待機中のイベントがなく、かつ inotify_instance が非ブロックモードである場合は FALSE を返します。各イベントは次のキーを持つ配列となります。

  • wd は、inotify_add_watch() が返す監視記述子です
  • mask は、events のビットマスクです
  • cookie は、接続関連のイベント (たとえば IN_MOVE_FROMIN_MOVE_TO) の一意な ID です
  • name は、ファイル名 (たとえば 監視対象のディレクトリ内でファイルが変更された場合) です

参考

  • inotify_init() - inotify インスタンスを初期化する
  • stream_select() - select() システムコールと同等の操作を、 ストリームの配列に対して tv_sec と tv_usec で指定されたタイムアウト時間をもって行う
  • stream_set_blocking() - ストリームのブロックモードを有効にする / 解除する
  • inotify_queue_len() - 待機中のイベントがある場合に正の数を返す

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User Contributed Notes 2 notes

up
6
qriff at hotmail dot com
6 years ago
<?php

$wd_constants
= array(
1 => array('IN_ACCESS','File was accessed (read)'),
2 => array('IN_MODIFY','File was modified'),
4 => array('IN_ATTRIB','Metadata changed (e.g. permissions, mtime, etc.)'),
8 => array('IN_CLOSE_WRITE','File opened for writing was closed'),
16 => array('IN_CLOSE_NOWRITE','File not opened for writing was closed'),
32 => array('IN_OPEN','File was opened'),
128 => array('IN_MOVED_TO','File moved into watched directory'),
64 => array('IN_MOVED_FROM','File moved out of watched directory'),
256 => array('IN_CREATE','File or directory created in watched directory'),
512 => array('IN_DELETE','File or directory deleted in watched directory'),
1024 => array('IN_DELETE_SELF','Watched file or directory was deleted'),
2048 => array('IN_MOVE_SELF','Watch file or directory was moved'),
24 => array('IN_CLOSE','Equals to IN_CLOSE_WRITE | IN_CLOSE_NOWRITE'),
192 => array('IN_MOVE','Equals to IN_MOVED_FROM | IN_MOVED_TO'),
4095 => array('IN_ALL_EVENTS','Bitmask of all the above constants'),
8192 => array('IN_UNMOUNT','File system containing watched object was unmounted'),
16384 => array('IN_Q_OVERFLOW','Event queue overflowed (wd is -1 for this event)'),
32768 => array('IN_IGNORED','Watch was removed (explicitly by inotify_rm_watch() or because file was removed or filesystem unmounted'),
1073741824 => array('IN_ISDIR','Subject of this event is a directory'),
1073741840 => array('IN_CLOSE_NOWRITE','High-bit: File not opened for writing was closed'),
1073741856 => array('IN_OPEN','High-bit: File was opened'),
1073742080 => array('IN_CREATE','High-bit: File or directory created in watched directory'),
1073742336 => array('IN_DELETE','High-bit: File or directory deleted in watched directory'),
16777216 => array('IN_ONLYDIR','Only watch pathname if it is a directory (Since Linux 2.6.15)'),
33554432 => array('IN_DONT_FOLLOW','Do not dereference pathname if it is a symlink (Since Linux 2.6.15)'),
536870912 => array('IN_MASK_ADD','Add events to watch mask for this pathname if it already exists (instead of replacing mask).'),
2147483648 => array('IN_ONESHOT','Monitor pathname for one event, then remove from watch list.')
);

$path = $argv[1];

$fd = inotify_init();
stream_set_blocking($fd, 0);
$watch_descriptor = inotify_add_watch($fd, $path, IN_ALL_EVENTS);

$poll = 0;
while (
true) {
 
$ecount = 0;
 
$fcount = 0;
 
// Poll for queued events, generated meanwhile
  // Because while (true) { } has some seriously bad mojo
 
sleep(5);
 
$poll++;
 
$events = inotify_read($fd);
  if (
$events) $ecount = count($events);
  echo
"=== ".date("Y-m-d H:i:s")." inotify poll #$poll contains ".$ecount." events";
  if (
$events) echo ":";
  echo
"\n";
  if (
$events) {
        foreach (
$events as $event) {
               
$fcount++;
                echo
"        inotify Event #".$fcount." - Object: ".$event['name'].": ".$wd_constants[$event['mask']][0]." (".$wd_constants[$event['mask']][1].")\n";
        }
  }
}

inotify_rm_watch($fd, $watch_descriptor);

fclose($fd);

?>
up
3
lingtalfi
5 years ago
once the watch is read, it is removed from the queue.
(inotify_queue_len will return 0)
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