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-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
- "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
-
-<refentry id='pam_set_data'>
-
- <refmeta>
- <refentrytitle>pam_set_data</refentrytitle>
- <manvolnum>3</manvolnum>
- <refmiscinfo class='setdesc'>Linux-PAM Manual</refmiscinfo>
- </refmeta>
-
- <refnamediv id='pam_set_data-name'>
- <refname>pam_set_data</refname>
- <refpurpose>
- set module internal data
- </refpurpose>
- </refnamediv>
-
-
-<!-- body begins here -->
-
- <refsynopsisdiv>
-
- <funcsynopsis id="pam_set_data-synopsis">
- <funcsynopsisinfo>#include &lt;security/pam_modules.h&gt;</funcsynopsisinfo>
- <funcprototype>
- <funcdef>int <function>pam_set_data</function></funcdef>
- <paramdef>pam_handle_t *<parameter>pamh</parameter></paramdef>
- <paramdef>const char *<parameter>module_data_name</parameter></paramdef>
- <paramdef>void *<parameter>data</parameter></paramdef>
- <paramdef>void <parameter>(*cleanup)(pam_handle_t *pamh, void *data, int error_status)</parameter></paramdef>
- </funcprototype>
- </funcsynopsis>
-
- </refsynopsisdiv>
-
-
- <refsect1 id="pam_set_data-description">
- <title>DESCRIPTION</title>
- <para>
- The <function>pam_set_data</function> function associates a pointer
- to an object with the (hopefully) unique string
- <emphasis>module_data_name</emphasis> in the PAM context specified
- by the <emphasis>pamh</emphasis> argument.
- </para>
-
- <para>
- PAM modules may be dynamically loadable objects. In general such files
- should not contain <emphasis>static</emphasis> variables. This function
- and its counterpart
- <citerefentry>
- <refentrytitle>pam_get_data</refentrytitle><manvolnum>3</manvolnum>
- </citerefentry>,
- provide a mechanism for a module to associate some data with
- the handle <emphasis>pamh</emphasis>. Typically a module will call the
- <function>pam_set_data</function> function to register some data
- under a (hopefully) unique <emphasis>module_data_name</emphasis>.
- The data is available for use by other modules too but
- <emphasis>not</emphasis> by an application. Since this functions
- stores only a pointer to the <emphasis>data</emphasis>, the module
- should not modify or free the content of it.
- </para>
-
- <para>
- The function <function>cleanup()</function> is associated with the
- <emphasis>data</emphasis> and, if non-NULL, it is called when this
- data is over-written or following a call to
- <citerefentry>
- <refentrytitle>pam_end</refentrytitle><manvolnum>3</manvolnum>
- </citerefentry>.
- </para>
-
- <para>
- The <emphasis>error_status</emphasis> argument is used to indicate
- to the module the sort of action it is to take in cleaning this data
- item. As an example, Kerberos creates a ticket file during the
- authentication phase, this file might be associated with a data item.
- When
- <citerefentry>
- <refentrytitle>pam_end</refentrytitle><manvolnum>3</manvolnum>
- </citerefentry>
- is called by the module, the <emphasis>error_status</emphasis>
- carries the return value of the
- <citerefentry>
- <refentrytitle>pam_authenticate</refentrytitle><manvolnum>3</manvolnum>
- </citerefentry>
- or other <emphasis>libpam</emphasis> function as appropriate. Based
- on this value the Kerberos module may choose to delete the ticket file
- (<emphasis>authentication failure</emphasis>) or leave it in place.
- </para>
-
- <para>
- The <emphasis>error_status</emphasis> may have been logically
- OR'd with either of the following two values:
- </para>
-
- <variablelist>
- <varlistentry>
- <term>PAM_DATA_REPLACE</term>
- <listitem>
- <para>
- When a data item is being replaced (through a second call to
- <function>pam_set_data</function>) this mask is used.
- Otherwise, the call is assumed to be from
- <citerefentry>
- <refentrytitle>pam_end</refentrytitle><manvolnum>3</manvolnum>
- </citerefentry>.
- </para>
- </listitem>
- </varlistentry>
-
- <varlistentry>
- <term>PAM_DATA_SILENT</term>
- <listitem>
- <para>
- Which indicates that the process would prefer to perform the
- <function>cleanup()</function> quietly. That is, discourages
- logging/messages to the user.
- </para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect1>
-
- <refsect1 id="pam_set_data-return_values">
- <title>RETURN VALUES</title>
- <variablelist>
- <varlistentry>
- <term>PAM_BUF_ERR</term>
- <listitem>
- <para>
- Memory buffer error.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>PAM_SUCCESS</term>
- <listitem>
- <para>
- Data was successful stored.
- </para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term>PAM_SYSTEM_ERR</term>
- <listitem>
- <para>
- A NULL pointer was submitted as PAM handle or the
- function was called by an application.
- </para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect1>
-
- <refsect1 id="pam_set_data-see_also">
- <title>SEE ALSO</title>
- <para>
- <citerefentry>
- <refentrytitle>pam_end</refentrytitle><manvolnum>3</manvolnum>
- </citerefentry>,
- <citerefentry>
- <refentrytitle>pam_get_data</refentrytitle><manvolnum>3</manvolnum>
- </citerefentry>,
- <citerefentry>
- <refentrytitle>pam_strerror</refentrytitle><manvolnum>3</manvolnum>
- </citerefentry>
- </para>
- </refsect1>
-
-</refentry>