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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<refentry xml:id="function.pcntl-sigprocmask" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>pcntl_sigprocmask</refname>
<refpurpose>Sets and retrieves blocked signals</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>bool</type><methodname>pcntl_sigprocmask</methodname>
<methodparam><type>int</type><parameter>how</parameter></methodparam>
<methodparam><type>array</type><parameter>set</parameter></methodparam>
<methodparam choice="opt"><type>array</type><parameter role="reference">oldset</parameter></methodparam>
</methodsynopsis>
<para>
The <function>pcntl_sigprocmask</function> function adds, removes or sets blocked
signals, depending on the <parameter>how</parameter> parameter.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>how</parameter></term>
<listitem>
<para>
Sets the behavior of <function>pcntl_sigprocmask</function>. Possible
values:
<simplelist>
<member><constant>SIG_BLOCK</constant>: Add the signals to the
currently blocked signals.</member>
<member><constant>SIG_UNBLOCK</constant>: Remove the signals from the
currently blocked signals.</member>
<member><constant>SIG_SETMASK</constant>: Replace the currently
blocked signals by the given list of signals.</member>
</simplelist>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>set</parameter></term>
<listitem>
<para>
List of signals.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>oldset</parameter></term>
<listitem>
<para>
The <parameter>oldset</parameter> parameter is set to an array
containing the list of the previously blocked signals.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&return.success;
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>pcntl_sigprocmask</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
pcntl_sigprocmask(SIG_BLOCK, array(SIGHUP));
$oldset = array();
pcntl_sigprocmask(SIG_UNBLOCK, array(SIGHUP), $oldset);
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>pcntl_sigwaitinfo</function></member>
<member><function>pcntl_sigtimedwait</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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