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<refentry xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="pam_xauth_data">
<refmeta>
<refentrytitle>pam_xauth_data</refentrytitle>
<manvolnum>3</manvolnum>
<refmiscinfo class="source">Linux-PAM</refmiscinfo>
<refmiscinfo class="manual">Linux-PAM Manual</refmiscinfo>
</refmeta>
<refnamediv xml:id="pam_xauth_data-name">
<refname>pam_xauth_data</refname>
<refpurpose>structure containing X authentication data</refpurpose>
</refnamediv>
<!-- body begins here -->
<refsynopsisdiv>
<funcsynopsis xml:id="pam_xauth_data-synopsis">
<funcsynopsisinfo>#include <security/pam_appl.h></funcsynopsisinfo>
</funcsynopsis>
<programlisting>
struct pam_xauth_data {
int namelen;
char *name;
int datalen;
char *data;
};
</programlisting>
</refsynopsisdiv>
<refsect1 xml:id="pam_xauth_data-description">
<title>DESCRIPTION</title>
<para>
The <function>pam_xauth_data</function> structure contains X
authentication data used to make a connection to an X display.
Using this mechanism, an application can communicate X
authentication data to PAM service modules. This allows modules to
make a connection to the user's X display in order to label the
user's session on login, display visual feedback or for other
purposes.
</para>
<para>
The <emphasis>name</emphasis> field contains the name of the
authentication method, such as "MIT-MAGIC-COOKIE-1". The
<emphasis>namelen</emphasis> field contains the length of this string,
not including the trailing NUL character.
</para>
<para>
The <emphasis>data</emphasis> field contains the authentication
method-specific data corresponding to the specified name. The
<emphasis>datalen</emphasis> field contains its length in bytes.
</para>
<para>
The X authentication data can be changed with the
<emphasis>PAM_XAUTH_DATA</emphasis> item. It can be queried and
set with
<citerefentry>
<refentrytitle>pam_get_item</refentrytitle><manvolnum>3</manvolnum>
</citerefentry>
and
<citerefentry>
<refentrytitle>pam_set_item </refentrytitle><manvolnum>3</manvolnum>
</citerefentry> respectively. The value used to set it should be
a pointer to a pam_xauth_data structure. An internal copy of both
the structure itself and its fields is made by PAM when setting the
item.
</para>
</refsect1>
<refsect1 xml:id="pam_xauth_data-see_also">
<title>SEE ALSO</title>
<para>
<citerefentry>
<refentrytitle>pam_start</refentrytitle><manvolnum>3</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>pam_get_item</refentrytitle><manvolnum>3</manvolnum>
</citerefentry>,
</para>
</refsect1>
<refsect1 xml:id="pam_xauth_data-standards">
<title>STANDARDS</title>
<para>
The <function>pam_xauth_data</function> structure and
<emphasis>PAM_XAUTH_DATA</emphasis> item are
Linux-PAM extensions.
</para>
</refsect1>
</refentry>
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