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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.eio-readlink" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>eio_readlink</refname>
<refpurpose>Read value of a symbolic link</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>resource</type><methodname>eio_readlink</methodname>
<methodparam><type>string</type><parameter>path</parameter></methodparam>
<methodparam><type>int</type><parameter>pri</parameter></methodparam>
<methodparam><type>callable</type><parameter>callback</parameter></methodparam>
<methodparam
choice="opt"><type>mixed</type><parameter>data</parameter><initializer>NULL</initializer></methodparam>
</methodsynopsis>
<para>
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<variablelist>
<varlistentry>
<term><parameter>path</parameter></term>
<listitem>
<para>
Source symbolic link path
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>pri</parameter></term>
<listitem>
&eio.request.pri.values;
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>callback</parameter></term>
<listitem>
&eio.callback.proto;
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>data</parameter></term>
<listitem>
<para>
Arbitrary variable passed to <parameter>callback</parameter>.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
<function>eio_readlink</function> returns request resource on success,&return.falseforfailure;.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example>
<title><function>eio_readlink</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$filename = dirname(__FILE__)."/symlink.dat";
touch($filename);
$link = dirname(__FILE__)."/symlink.link";
$hardlink = dirname(__FILE__)."/hardlink.link";
function my_hardlink_cb($data, $result) {
global $link, $filename;
var_dump(file_exists($data) && !is_link($data));
@unlink($data);
eio_symlink($filename, $link, EIO_PRI_DEFAULT, "my_symlink_cb", $link);
}
function my_symlink_cb($data, $result) {
global $link, $filename;
var_dump(file_exists($data) && is_link($data));
if (!eio_readlink($data, EIO_PRI_DEFAULT, "my_readlink_cb", NULL)) {
@unlink($link);
@unlink($filename);
}
}
function my_readlink_cb($data, $result) {
global $filename, $link;
var_dump($result);
@unlink($link);
@unlink($filename);
}
eio_link($filename, $hardlink, EIO_PRI_DEFAULT, "my_hardlink_cb", $hardlink);
eio_event_loop();
?>
]]>
</programlisting>
&example.outputs.similar;
<screen>
<![CDATA[
bool(true)
bool(true)
string(16) "/tmp/symlink.dat"
]]>
</screen>
</example>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<simplelist>
<member><function>eio_symlink</function></member>
</simplelist>
</refsect1>
</refentry>
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