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<!--
$Id: pam_mail.sgml,v 1.2 1997/02/15 18:25:44 morgan Exp $
This file was written by Andrew G. Morgan <morgan@parc.power.net>
-->
<sect1>The last login module
<sect2>Synopsis
<p>
<descrip>
<tag><bf>Module Name:</bf></tag>
<tt/pam_lastlog/
<tag><bf>Author:</bf></tag>
Andrew G. Morgan <morgan@parc.power.net>
<tag><bf>Maintainer:</bf></tag>
Author
<tag><bf>Management groups provided:</bf></tag>
auth
<tag><bf>Cryptographically sensitive:</bf></tag>
<tag><bf>Security rating:</bf></tag>
<tag><bf>Clean code base:</bf></tag>
<tag><bf>System dependencies:</bf></tag>
uses information contained in the <tt>/var/log/wtmp</tt> file.
<tag><bf>Network aware:</bf></tag>
</descrip>
<sect2>Overview of module
<p>
This session module maintains the <tt>/var/log/wtmp</tt> file. Adding
an open entry when called via the <tt>pam_open_seesion()</tt> function
and completing it when <tt>pam_close_session()</tt> is called. This
module can also display a line of information about the last login of
the user. If an application already performs these tasks, it is not
necessary to use this module.
<sect2>Authentication component
<p>
<descrip>
<tag><bf>Recognized arguments:</bf></tag>
<tt/debug/; <tt/nodate/; <tt/noterm/; <tt/nohost/; <tt/silent/;
<tt/never/
<tag><bf>Description:</bf></tag>
<p>
This module can be used to provide a ``Last login on ...''
message. when the user logs into the system from what ever application
uses the PAM libraries. In addition, the module maintains the
<tt>/var/log/wtmp</tt> file.
<p>
The behavior of this module can be modified with one of the following
flags:
<p>
<itemize>
<item><tt/debug/
- write more information to <tt/syslog(3)/.
<item><tt/nodate/
- neglect to give the date of the last login when displaying
information about the last login on the system.
<item><tt/noterm/
- neglect to diplay the terminal name on which the last login was
attempt.
<item><tt/nohost/
- neglect to indicate from which host the last login was attempted.
<item><tt/silent/
- neglect to inform the user about any previous login: just update
the <tt>/var/log/wtmp</tt> file.
<item><tt/never/
- if the <tt>/var/log/wtmp</tt> file does not contain any old entries
for the user, indicate that the user has never previously logged in
with a ``welcome..." message.
</itemize>
<tag><bf>Examples/suggested usage:</bf></tag>
This module can be used to indicate that the user has new mail when
they <em/login/ to the system. Here is a sample entry for your
<tt>/etc/pam.conf</tt> file:
<tscreen>
<verb>
#
# do we have any mail?
#
login session optional pam_lastlog.so
</verb>
</tscreen>
<p>
Note, some applications may perform this function themselves. In such
cases, this module is not necessary.
</descrip>
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End of sgml insert for this module.
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