mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-18 05:26:57 +08:00
165 lines
11 KiB
HTML
165 lines
11 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
<html>
|
||
<head>
|
||
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
|
||
<title>Read value of a symbolic link</title>
|
||
</head>
|
||
<body class="docs"><div id="layout">
|
||
<div id="layout-content"><div id="function.eio-readlink" class="refentry">
|
||
<div class="refnamediv">
|
||
<h1 class="refname">eio_readlink</h1>
|
||
<p class="verinfo">(PECL eio >= 0.0.1dev)</p><p class="refpurpose"><span class="refname">eio_readlink</span> — <span class="dc-title">Read value of a symbolic link</span></p>
|
||
|
||
</div>
|
||
|
||
<div class="refsect1 description" id="refsect1-function.eio-readlink-description">
|
||
<h3 class="title">说明</h3>
|
||
<div class="methodsynopsis dc-description">
|
||
<span class="methodname"><strong>eio_readlink</strong></span>
|
||
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$path</code></span>
|
||
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$pri</code></span>
|
||
, <span class="methodparam"><span class="type"><a href="language.types.callable.html" class="type callable">callable</a></span> <code class="parameter">$callback</code></span>
|
||
[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$data</code><span class="initializer"> = NULL</span></span>
|
||
] ) : <span class="type">resource</span></div>
|
||
|
||
<p class="para rdfs-comment">
|
||
|
||
</p>
|
||
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 parameters" id="refsect1-function.eio-readlink-parameters">
|
||
<h3 class="title">参数</h3>
|
||
<dl>
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">path</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
Source symbolic link path
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">pri</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">请求的优先级：<strong><code>EIO_PRI_DEFAULT</code></strong>，<strong><code>EIO_PRI_MIN</code></strong>，<strong><code>EIO_PRI_MAX</code></strong> 或 <strong><code>NULL</code></strong>。如果是
|
||
<strong><code>NULL</code></strong>，<code class="parameter">pri</code> 将设为
|
||
<strong><code>EIO_PRI_DEFAULT</code></strong>。
|
||
</p>
|
||
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">callback</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
<code class="parameter">callback</code>
|
||
函数在请求完成时被调用。其应匹配一下原型：<div class="example-contents"><div class="phpcode"><pre><span style="color: #000000">
|
||
void callback(mixed $data, int $result[, resource $req]);</span>
|
||
</pre></div></div>
|
||
|
||
<dl>
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">data</code></dt>
|
||
|
||
<dd>
|
||
<p class="para">传递给请求的用户数据。</p></dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">result</code></dt>
|
||
|
||
<dd>
|
||
<p class="para">针对请求的结果的值。通常是相应的系统调用返回的值。</p></dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">req</code></dt>
|
||
|
||
<dd>
|
||
<p class="para">可选的请求资源，可被 <span class="function"><a href="eio_get_last_error.html" class="function">eio_get_last_error()</a></span>
|
||
之类的函数使用。</p></dd>
|
||
|
||
|
||
</dl>
|
||
|
||
</p>
|
||
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">data</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
Arbitrary variable passed to <code class="parameter">callback</code>.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
</dl>
|
||
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 returnvalues" id="refsect1-function.eio-readlink-returnvalues">
|
||
<h3 class="title">返回值</h3>
|
||
<p class="para">
|
||
<span class="function"><strong>eio_readlink()</strong></span> returns request resource on success or <strong><code>FALSE</code></strong> on error.
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 examples" id="refsect1-function.eio-readlink-examples">
|
||
<h3 class="title">范例</h3>
|
||
<div class="example" id="example-4285">
|
||
<p><strong>Example #1 <span class="function"><strong>eio_readlink()</strong></span> example</strong></p>
|
||
<div class="example-contents">
|
||
<div class="phpcode"><pre><span style="color: #000000">
|
||
<span style="color: #0000BB"><?php<br />$filename </span><span style="color: #007700">= </span><span style="color: #0000BB">dirname</span><span style="color: #007700">(</span><span style="color: #0000BB">__FILE__</span><span style="color: #007700">).</span><span style="color: #DD0000">"/symlink.dat"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">touch</span><span style="color: #007700">(</span><span style="color: #0000BB">$filename</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$link </span><span style="color: #007700">= </span><span style="color: #0000BB">dirname</span><span style="color: #007700">(</span><span style="color: #0000BB">__FILE__</span><span style="color: #007700">).</span><span style="color: #DD0000">"/symlink.link"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$hardlink </span><span style="color: #007700">= </span><span style="color: #0000BB">dirname</span><span style="color: #007700">(</span><span style="color: #0000BB">__FILE__</span><span style="color: #007700">).</span><span style="color: #DD0000">"/hardlink.link"</span><span style="color: #007700">;<br /><br />function </span><span style="color: #0000BB">my_hardlink_cb</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">, </span><span style="color: #0000BB">$result</span><span style="color: #007700">) {<br /> global </span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #0000BB">$filename</span><span style="color: #007700">;<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">file_exists</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">) && !</span><span style="color: #0000BB">is_link</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">));<br /> @</span><span style="color: #0000BB">unlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">);<br /><br /> </span><span style="color: #0000BB">eio_symlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$filename</span><span style="color: #007700">, </span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #0000BB">EIO_PRI_DEFAULT</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_symlink_cb"</span><span style="color: #007700">, </span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br />}<br /><br />function </span><span style="color: #0000BB">my_symlink_cb</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">, </span><span style="color: #0000BB">$result</span><span style="color: #007700">) {<br /> global </span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #0000BB">$filename</span><span style="color: #007700">;<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">file_exists</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">) && </span><span style="color: #0000BB">is_link</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">));<br /><br /> if (!</span><span style="color: #0000BB">eio_readlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">, </span><span style="color: #0000BB">EIO_PRI_DEFAULT</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_readlink_cb"</span><span style="color: #007700">, </span><span style="color: #0000BB">NULL</span><span style="color: #007700">)) {<br /> @</span><span style="color: #0000BB">unlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /> @</span><span style="color: #0000BB">unlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$filename</span><span style="color: #007700">);<br /> }<br />}<br /><br />function </span><span style="color: #0000BB">my_readlink_cb</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">, </span><span style="color: #0000BB">$result</span><span style="color: #007700">) {<br /> global </span><span style="color: #0000BB">$filename</span><span style="color: #007700">, </span><span style="color: #0000BB">$link</span><span style="color: #007700">;<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /><br /> @</span><span style="color: #0000BB">unlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /> @</span><span style="color: #0000BB">unlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$filename</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #0000BB">eio_link</span><span style="color: #007700">(</span><span style="color: #0000BB">$filename</span><span style="color: #007700">, </span><span style="color: #0000BB">$hardlink</span><span style="color: #007700">, </span><span style="color: #0000BB">EIO_PRI_DEFAULT</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_hardlink_cb"</span><span style="color: #007700">, </span><span style="color: #0000BB">$hardlink</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">eio_event_loop</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?></span>
|
||
</span>
|
||
</pre></div>
|
||
</div>
|
||
|
||
<div class="example-contents"><p>以上例程的输出类似于：</p></div>
|
||
<div class="example-contents screen">
|
||
<div class="cdata"><pre>
|
||
bool(true)
|
||
bool(true)
|
||
string(16) "/tmp/symlink.dat"
|
||
</pre></div>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
|
||
|
||
|
||
<div class="refsect1 seealso" id="refsect1-function.eio-readlink-seealso">
|
||
<h3 class="title">参见</h3>
|
||
<ul class="simplelist">
|
||
<li class="member">eio_symlink</li>
|
||
</ul>
|
||
</div>
|
||
|
||
|
||
</div></div></div></body></html> |