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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_putenv'>
<refmeta>
<refentrytitle>pam_putenv</refentrytitle>
<manvolnum>3</manvolnum>
<refmiscinfo class='setdesc'>Linux-PAM Manual</refmiscinfo>
</refmeta>
<refnamediv id="pam_putenv-name">
<refname>pam_putenv</refname>
<refpurpose>set or change PAM environment variable</refpurpose>
</refnamediv>
<!-- body begins here -->
<refsynopsisdiv>
<funcsynopsis id='pam_putenv-synopsis'>
<funcsynopsisinfo>#include <security/pam_appl.h></funcsynopsisinfo>
<funcprototype>
<funcdef>int <function>pam_putenv</function></funcdef>
<paramdef>pam_handle_t *<parameter>pamh</parameter></paramdef>
<paramdef>const char *<parameter>name_value</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id='pam_putenv-description'>
<title>DESCRIPTION</title>
<para>
The <function>pam_putenv</function> function is used to
add or change the value of PAM environment variables as
associated with the <emphasis>pamh</emphasis> handle.
</para>
<para>
The <emphasis>pamh</emphasis> argument is an authentication
handle obtained by a prior call to pam_start().
The <emphasis>name_value</emphasis> argument is a single NUL
terminated string of one of the following forms:
</para>
<variablelist>
<varlistentry>
<term>NAME=value of variable</term>
<listitem>
<para>
In this case the environment variable of the given NAME
is set to the indicated value:
<emphasis>value of variable</emphasis>. If this variable
is already known, it is overwritten. Otherwise it is added
to the PAM environment.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>NAME=</term>
<listitem>
<para>
This function sets the variable to an empty value. It is
listed separately to indicate that this is the correct way
to achieve such a setting.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>NAME</term>
<listitem>
<para>
Without an '=' the pam_putenv() function will delete the
corresponding variable from the PAM environment.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id="pam_putenv-return_values">
<title>RETURN VALUES</title>
<variablelist>
<varlistentry>
<term>PAM_PERM_DENIED</term>
<listitem>
<para>
Argument <emphasis>name_value</emphasis> given is a NULL pointer.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>PAM_BAD_ITEM</term>
<listitem>
<para>
Variable requested (for deletion) is not currently set.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>PAM_ABORT</term>
<listitem>
<para>
The <emphasis>pamh</emphasis> handle is corrupt.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>PAM_BUF_ERR</term>
<listitem>
<para>
Memory buffer error.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>PAM_SUCCESS</term>
<listitem>
<para>
The environment variable was successfully updated.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 id='pam_putenv-see_also'>
<title>SEE ALSO</title>
<para>
<citerefentry>
<refentrytitle>pam_start</refentrytitle><manvolnum>3</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>pam_getenv</refentrytitle><manvolnum>3</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>pam_getenvlist</refentrytitle><manvolnum>3</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>pam_strerror</refentrytitle><manvolnum>3</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum>
</citerefentry>
</para>
</refsect1>
</refentry>
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