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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Initialize an inotify instance</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.inotify-init" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">inotify_init</h1>
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<p class="verinfo">(PECL inotify >= 0.1.2)</p><p class="refpurpose"><span class="refname">inotify_init</span> — <span class="dc-title">Initialize an inotify instance</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.inotify-init-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>inotify_init</strong></span>
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( <span class="methodparam">void</span>
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) : <span class="type">resource</span></div>
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<p class="para rdfs-comment">
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Initialize an inotify instance for use with
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<span class="function"><a href="inotify_add_watch.html" class="function">inotify_add_watch()</a></span>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.inotify-init-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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A stream resource or <strong><code>FALSE</code></strong> on error.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.inotify-init-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-2853">
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<p><strong>Example #1 Example usage of inotify</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// Open an inotify instance<br /></span><span style="color: #0000BB">$fd </span><span style="color: #007700">= </span><span style="color: #0000BB">inotify_init</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">// Watch __FILE__ for metadata changes (e.g. mtime)<br /></span><span style="color: #0000BB">$watch_descriptor </span><span style="color: #007700">= </span><span style="color: #0000BB">inotify_add_watch</span><span style="color: #007700">(</span><span style="color: #0000BB">$fd</span><span style="color: #007700">, </span><span style="color: #0000BB">__FILE__</span><span style="color: #007700">, </span><span style="color: #0000BB">IN_ATTRIB</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// generate an event<br /></span><span style="color: #0000BB">touch</span><span style="color: #007700">(</span><span style="color: #0000BB">__FILE__</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Read events<br /></span><span style="color: #0000BB">$events </span><span style="color: #007700">= </span><span style="color: #0000BB">inotify_read</span><span style="color: #007700">(</span><span style="color: #0000BB">$fd</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$events</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// The following methods allows to use inotify functions without blocking on inotify_read():<br /><br />// - Using stream_select() on $fd:<br /></span><span style="color: #0000BB">$read </span><span style="color: #007700">= array(</span><span style="color: #0000BB">$fd</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$write </span><span style="color: #007700">= </span><span style="color: #0000BB">null</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$except </span><span style="color: #007700">= </span><span style="color: #0000BB">null</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">stream_select</span><span style="color: #007700">(</span><span style="color: #0000BB">$read</span><span style="color: #007700">,</span><span style="color: #0000BB">$write</span><span style="color: #007700">,</span><span style="color: #0000BB">$except</span><span style="color: #007700">,</span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// - Using stream_set_blocking() on $fd<br /></span><span style="color: #0000BB">stream_set_blocking</span><span style="color: #007700">(</span><span style="color: #0000BB">$fd</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">inotify_read</span><span style="color: #007700">(</span><span style="color: #0000BB">$fd</span><span style="color: #007700">); </span><span style="color: #FF8000">// Does no block, and return false if no events are pending<br /><br />// - Using inotify_queue_len() to check if event queue is not empty<br /></span><span style="color: #0000BB">$queue_len </span><span style="color: #007700">= </span><span style="color: #0000BB">inotify_queue_len</span><span style="color: #007700">(</span><span style="color: #0000BB">$fd</span><span style="color: #007700">); </span><span style="color: #FF8000">// If > 0, inotify_read() will not block<br /><br />// Stop watching __FILE__ for metadata changes<br /></span><span style="color: #0000BB">inotify_rm_watch</span><span style="color: #007700">(</span><span style="color: #0000BB">$fd</span><span style="color: #007700">, </span><span style="color: #0000BB">$watch_descriptor</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Close the inotify instance<br />// This may have closed all watches if this was not already done<br /></span><span style="color: #0000BB">fclose</span><span style="color: #007700">(</span><span style="color: #0000BB">$fd</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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<div class="example-contents"><p>以上例程的输出类似于：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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array(
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array(
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'wd' => 1, // Equals $watch_descriptor
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'mask' => 4, // IN_ATTRIB bit is set
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'cookie' => 0, // unique id to connect related events (e.g.
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// IN_MOVE_FROM and IN_MOVE_TO events)
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'name' => '', // the name of a file (e.g. if we monitored changes
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// in a directory)
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),
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);
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.inotify-init-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="inotify_add_watch.html" class="function" rel="rdfs-seeAlso">inotify_add_watch()</a> - Add a watch to an initialized inotify instance</span></li>
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<li class="member"><span class="function"><a href="inotify_rm_watch.html" class="function" rel="rdfs-seeAlso">inotify_rm_watch()</a> - Remove an existing watch from an inotify instance</span></li>
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<li class="member"><span class="function"><a href="inotify_queue_len.html" class="function" rel="rdfs-seeAlso">inotify_queue_len()</a> - Return a number upper than zero if there are pending events</span></li>
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<li class="member"><span class="function"><a href="inotify_read.html" class="function" rel="rdfs-seeAlso">inotify_read()</a> - Read events from an inotify instance</span></li>
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<li class="member"><span class="function"><a href="fclose.html" class="function" rel="rdfs-seeAlso">fclose()</a> - 关闭一个已打开的文件指针</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |