shadow/man/sulogin.8.xml

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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
		"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd">
<refentry id='sulogin.8'>
  <!--  $Id: sulogin.8.xml,v 1.7 2005/06/15 12:39:27 kloczek Exp $ -->
  <refmeta>
    <refentrytitle>sulogin</refentrytitle>
    <manvolnum>8</manvolnum>
  </refmeta>
  <refnamediv id='name'>
    <refname>sulogin</refname>
    <refpurpose>Single-user login</refpurpose>
  </refnamediv>
  
  <refsect1 id='syntax'>
    <title>SYNTAX</title>
    <para>
      <command>sulogin</command> [<emphasis remap='I'>
        tty-device
      </emphasis>
      ]
    </para>
  </refsect1>
  
  <refsect1 id='description'>
    <title>DESCRIPTION</title>
    <para>
      <command>sulogin</command> is invoked by <command>init</command> prior
      to allowing the user access to the system when in single user mode. 
      This feature may only be available on certain systems where
      <command>init</command> has been modified accordingly, or where the
      <filename>/etc/inittab</filename> has an entry for a single user
      login.
    </para>
    
    <para>The user is prompted</para>
    
    <para>Type control-d to proceed with normal startup,
      <!-- .br -->
      (or give root password for system maintenance):
    </para>
    
    <para>Input and output will be performed with the standard file
      descriptors unless
      the optional device name argument is provided.
    </para>
    
    <para>If the user enters the correct root password, a login session is
      initiated.
      When <emphasis remap='B'>EOF</emphasis> is pressed instead, the
      system enters multi-user mode.
    </para>
    
    <para>After the user exits the single-user shell, or presses <emphasis
      remap='B'>EOF</emphasis>, the system begins the initialization process
      required to enter multi-user mode.
    </para>
  </refsect1>
  
  <refsect1 id='caveats'>
    <title>CAVEATS</title>
    <para>
      This command can only be used if <command>init</command> has been
      modified to call <command>sulogin</command> instead of
      <filename>/bin/sh</filename>, or if the user has set the <emphasis
      remap='I'>inittab</emphasis> to support a single user login. For
      example, the line:
    </para>
    <!-- .br -->
    
    <para>co:s:respawn:/etc/sulogin /dev/console</para>
    <!-- .br -->
    
    <para>should execute the sulogin command in single user mode.</para>
    
    <para>As complete an environment as possible is created. However,
      various devices
      may be unmounted or uninitialized and many of the user commands may
      be
      unavailable or nonfunctional as a result.
    </para>
  </refsect1>
  
  <refsect1 id='files'>
    <title>FILES</title>
    <variablelist>
      <varlistentry>
        <term><filename>/etc/passwd</filename></term>
        <listitem>user account information</listitem>
      </varlistentry>
      <varlistentry>
        <term><filename>/etc/shadow</filename></term>
        <listitem>secure user account information</listitem>
      </varlistentry>
    </variablelist>
  </refsect1>
  
  <refsect1 id='see_also'>
    <title>SEE ALSO</title>
    <para><citerefentry>
        <refentrytitle>login</refentrytitle><manvolnum>1</manvolnum>
      </citerefentry>,
      <citerefentry>
        <refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
      </citerefentry>,
      <citerefentry>
        <refentrytitle>init</refentrytitle><manvolnum>8</manvolnum>
      </citerefentry>
    </para>
  </refsect1>
  
  <refsect1 id='author'>
    <title>AUTHOR</title>
    <para>Julianne Frances Haugh (jockgrrl@ix.netcom.com)</para>
  </refsect1>
</refentry>