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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.4 $ -->
<!-- splitted from ./en/functions/sem.xml, last change in rev 1.2 -->
<refentry id='function.ftok'>
<refnamediv>
<refname>ftok</refname>
<refpurpose>
Convert a pathname and a project identifier to a System V IPC key
</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>int</type><methodname>ftok</methodname>
<methodparam><type>string</type><parameter>pathname</parameter></methodparam>
<methodparam><type>string</type><parameter>proj</parameter></methodparam>
</methodsynopsis>
<para>
The function converts the <parameter>pathname</parameter> of an existing
accessible file and a project identifier (<parameter>proj</parameter>)
into a
<literal>integer</literal> for use with for example
<function>shmop_open</function> and other System V IPC keys. The
<parameter>proj</parameter> parameter should be a one character string.
</para>
<para>
On success the return value will be the created key value, otherwise
<literal>-1</literal> is returned.
</para>
<para>
See also <function>shmop_open</function> and <function>sem_get</function>.
</para>
</refsect1>
</refentry>
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