inotify_read
(PECL inotify >= 0.1.2)
inotify_read — Read events from an inotify instance
Description
array inotify_read
( resource
$inotify_instance
)Read inotify events from an inotify instance.
Return Values
An array of inotify events or FALSE if no events was pending and
inotify_instance is non-blocking. Each event is an array with the following keys:
- wd is a watch descriptor returned by inotify_add_watch()
- mask is a bit mask of events
- cookie is a unique id to connect related events (e.g.
IN_MOVE_FROMandIN_MOVE_TO) - name is the name of a file (e.g. if a file was modified in a watched directory)
See Also
- inotify_init() - Initialize an inotify instance
- stream_select() - Runs the equivalent of the select() system call on the given arrays of streams with a timeout specified by tv_sec and tv_usec
- stream_set_blocking() - Set blocking/non-blocking mode on a stream
- inotify_queue_len() - Return a number upper than zero if there are pending events
Коментарии
<?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);
?>
once the watch is read, it is removed from the queue.(inotify_queue_len will return 0)