<!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>Sets and retrieves blocked signals</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.pcntl-signal.html">pcntl_signal</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.pcntl-sigtimedwait.html">pcntl_sigtimedwait</a></div> <div class="up"><a href="ref.pcntl.html">PCNTL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="function.pcntl-sigprocmask" class="refentry"> <div class="refnamediv"> <h1 class="refname">pcntl_sigprocmask</h1> <p class="verinfo">(PHP 5 >= 5.3.0)</p><p class="refpurpose"><span class="refname">pcntl_sigprocmask</span> — <span class="dc-title">Sets and retrieves blocked signals</span></p> </div> <div class="refsect1 description" id="refsect1-function.pcntl-sigprocmask-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><strong>pcntl_sigprocmask</strong></span> ( <span class="methodparam"><span class="type">int</span> <code class="parameter">$how</code></span> , <span class="methodparam"><span class="type">array</span> <code class="parameter">$set</code></span> [, <span class="methodparam"><span class="type">array</span> <code class="parameter reference">&$oldset</code></span> ] )</div> <p class="para rdfs-comment"> The <span class="function"><strong>pcntl_sigprocmask()</strong></span> function adds, removes or sets blocked signals, depending on the <em><code class="parameter">how</code></em> parameter. </p> </div> <div class="refsect1 parameters" id="refsect1-function.pcntl-sigprocmask-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><em><code class="parameter">how</code></em></span> <dd> <p class="para"> Sets the behavior of <span class="function"><strong>pcntl_sigprocmask()</strong></span>. Possible values: <ul class="simplelist"> <li class="member"><strong><code>SIG_BLOCK</code></strong>: Add the signals to the currently blocked signals.</li> <li class="member"><strong><code>SIG_UNBLOCK</code></strong>: Remove the signals from the currently blocked signals.</li> <li class="member"><strong><code>SIG_SETMASK</code></strong>: Replace the currently blocked signals by the given list of signals.</li> </ul> </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">set</code></em></span> <dd> <p class="para"> List of signals. </p> </dd> </dt> <dt> <span class="term"><em><code class="parameter">oldset</code></em></span> <dd> <p class="para"> The <em><code class="parameter">oldset</code></em> parameter is set to an array containing the list of the previously blocked signals. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.pcntl-sigprocmask-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure. </p> </div> <div class="refsect1 examples" id="refsect1-function.pcntl-sigprocmask-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-3646"> <p><strong>Example #1 <span class="function"><strong>pcntl_sigprocmask()</strong></span> example</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />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 /></span><span style="color: #0000BB">$oldset </span><span style="color: #007700">= array();<br /></span><span style="color: #0000BB">pcntl_sigprocmask</span><span style="color: #007700">(</span><span style="color: #0000BB">SIG_UNBLOCK</span><span style="color: #007700">, array(</span><span style="color: #0000BB">SIGHUP</span><span style="color: #007700">), </span><span style="color: #0000BB">$oldset</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> </div> </p> </div> <div class="refsect1 seealso" id="refsect1-function.pcntl-sigprocmask-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"> <span class="function"><a href="function.pcntl-sigwaitinfo.html" class="function" rel="rdfs-seeAlso">pcntl_sigwaitinfo()</a> - Waits for signals</span></li> <li class="member"> <span class="function"><a href="function.pcntl-sigtimedwait.html" class="function" rel="rdfs-seeAlso">pcntl_sigtimedwait()</a> - Waits for signals, with a timeout</span></li> </ul> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.pcntl-signal.html">pcntl_signal</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.pcntl-sigtimedwait.html">pcntl_sigtimedwait</a></div> <div class="up"><a href="ref.pcntl.html">PCNTL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>