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137 lines
6.3 KiB
HTML
137 lines
6.3 KiB
HTML
<!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>等待信号</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.pcntl-sigwaitinfo" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">pcntl_sigwaitinfo</h1>
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<p class="verinfo">(PHP 5 >= 5.3.0, PHP 7)</p><p class="refpurpose"><span class="refname">pcntl_sigwaitinfo</span> — <span class="dc-title">等待信号</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.pcntl-sigwaitinfo-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>pcntl_sigwaitinfo</strong></span>
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( <span class="methodparam"><span class="type">array</span> <code class="parameter">$set</code></span>
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[, <span class="methodparam"><span class="type">array</span> <code class="parameter reference">&$siginfo</code></span>
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] ) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>pcntl_sigwaitinfo()</strong></span>函数暂停调用脚本的执行直到接收到<code class="parameter">set</code>
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参数中列出的某个信号。只要其中的一个信号已经在等待状态(比如： 通过
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<span class="function"><a href="pcntl_sigprocmask.html" class="function">pcntl_sigprocmask()</a></span>函数阻塞)，
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函数<span class="function"><strong>pcntl_sigwaitinfo()</strong></span>就回立刻返回。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.pcntl-sigwaitinfo-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">set</code></dt>
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<dd>
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<p class="para">
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要等待的信号数组。
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</p>
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</dd>
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<dt>
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<code class="parameter">siginfo</code></dt>
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<dd>
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<p class="para">
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<code class="parameter">siginfo</code>是一个输出参数，用来返回信号的信息。
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</p>
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<p class="para">
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以下元素会为所有信号设置：
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<ul class="simplelist">
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<li class="member">signo: 信号编号</li>
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<li class="member">errno: 错误编号</li>
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<li class="member">code: 信号代码</li>
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</ul>
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</p>
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<p class="para">
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下面元素可能会为<strong><code>SIGCHLD</code></strong>信号设置:
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<ul class="simplelist">
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<li class="member">status: 退出的值或信号</li>
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<li class="member">utime: 用户消耗的时间</li>
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<li class="member">stime: 系统（内核）消耗的时间</li>
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<li class="member">pid: 发送进程ID</li>
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<li class="member">uid: 发送进程的实际用户ID</li>
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</ul>
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</p>
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<p class="para">
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信号<strong><code>SIGILL</code></strong>,
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<strong><code>SIGFPE</code></strong>, <strong><code>SIGSEGV</code></strong> 和
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<strong><code>SIGBUS</code></strong> 可能会被设置的元素:
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<ul class="simplelist">
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<li class="member">addr: 发生故障的内存位置</li>
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</ul>
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</p>
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<p class="para">
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可能会为<strong><code>SIGPOLL</code></strong>
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信号设置的元素：
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<ul class="simplelist">
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<li class="member">band: Band event</li>
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<li class="member">fd: 文件描述符</li>
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</ul>
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.pcntl-sigwaitinfo-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功时，函数<span class="function"><strong>pcntl_sigwaitinfo()</strong></span>返回一个信号编号。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.pcntl-sigwaitinfo-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-4330">
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<p><strong>Example #1 <span class="function"><strong>pcntl_sigwaitinfo()</strong></span> example</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: #007700">echo </span><span style="color: #DD0000">"Blocking SIGHUP signal\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">pcntl_sigprocmask</span><span style="color: #007700">(</span><span style="color: #0000BB">SIG_BLOCK</span><span style="color: #007700">, array(</span><span style="color: #0000BB">SIGHUP</span><span style="color: #007700">));<br /><br />echo </span><span style="color: #DD0000">"Sending SIGHUP to self\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">posix_kill</span><span style="color: #007700">(</span><span style="color: #0000BB">posix_getpid</span><span style="color: #007700">(), </span><span style="color: #0000BB">SIGHUP</span><span style="color: #007700">);<br /><br />echo </span><span style="color: #DD0000">"Waiting for signals\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$info </span><span style="color: #007700">= array();<br /></span><span style="color: #0000BB">pcntl_sigwaitinfo</span><span style="color: #007700">(array(</span><span style="color: #0000BB">SIGHUP</span><span style="color: #007700">), </span><span style="color: #0000BB">$info</span><span style="color: #007700">);<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>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.pcntl-sigwaitinfo-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="pcntl_sigprocmask.html" class="function" rel="rdfs-seeAlso">pcntl_sigprocmask()</a> - 设置或检索阻塞信号</span></li>
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<li class="member"><span class="function"><a href="pcntl_sigtimedwait.html" class="function" rel="rdfs-seeAlso">pcntl_sigtimedwait()</a> - 带超时机制的信号等待</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> |