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inotify_init
(PECL inotify >= 0.1.2)
inotify_init — Initialize an inotify instance
Description
Initialize an inotify instance for use with inotify_add_watch()
Examples
Example #1 Example usage of inotify
<?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);
?>
The above example will output something similar to:
array( array( 'wd' => 1, // Equals $watch_descriptor 'mask' => 4, // IN_ATTRIB bit is set 'cookie' => 0, // unique id to connect related events (e.g. // IN_MOVE_FROM and IN_MOVE_TO events) 'name' => '', // the name of a file (e.g. if we monitored changes // in a directory) ), );
See Also
- inotify_add_watch() - Add a watch to an initialized inotify instance
- inotify_rm_watch() - Remove an existing watch from an inotify instance
- inotify_queue_len() - Return a number upper than zero if there are pending events
- inotify_read() - Read events from an inotify instance
- fclose() - Closes an open file pointer
English translation
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Document created the 30/01/2003, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/php-rf-inotify-init.html
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References
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