117 lines
4.5 KiB
XML
117 lines
4.5 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
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"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd">
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<refentry id='pwconv.8'>
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<!-- $Id: pwconv.8.xml,v 1.7 2005/06/15 12:39:27 kloczek Exp $ -->
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<refentryinfo>
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<date>26 Sep 1997</date>
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</refentryinfo>
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<refmeta>
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<refentrytitle>PWCONV</refentrytitle>
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<manvolnum>8</manvolnum>
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<refmiscinfo class='date'>26 Sep 1997</refmiscinfo>
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</refmeta>
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<refnamediv id='name'>
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<refname>pwconv</refname>
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<refname>pwunconv</refname>
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<refname>grpconv</refname>
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<refname>grpunconv</refname>
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<refpurpose>convert to and from shadow passwords and groups.</refpurpose>
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</refnamediv>
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<refsynopsisdiv id='synopsis'>
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<cmdsynopsis>
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<command>pwconv</command>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>pwunconv</command>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>grpconv</command>
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</cmdsynopsis>
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<cmdsynopsis>
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<command>grpunconv</command>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsect1 id='description'>
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<title>DESCRIPTION</title>
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<para><command>pwconv</command> creates <emphasis
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remap='I'>shadow</emphasis> from <emphasis remap='I'>passwd</emphasis>
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and an optionally existing <emphasis remap='I'>shadow</emphasis>.
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</para>
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<para><command>pwunconv</command> creates <emphasis
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remap='I'>passwd</emphasis> from <emphasis remap='I'>passwd</emphasis>
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and <emphasis remap='I'>shadow</emphasis> and then removes <emphasis
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remap='I'>shadow</emphasis>.
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</para>
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<para><command>grpconv</command> creates <emphasis
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remap='I'>gshadow</emphasis> from <emphasis remap='I'>group</emphasis>
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and an optionally existing <emphasis remap='I'>gshadow</emphasis>.
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</para>
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<para><command>grpunconv</command> creates <emphasis
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remap='I'>group</emphasis> from <emphasis remap='I'>group</emphasis>
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and <emphasis remap='I'>gshadow</emphasis> and then removes <emphasis
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remap='I'>gshadow</emphasis>.
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</para>
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<para>These four programs all operate on the normal and shadow password
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and group files: <filename>/etc/passwd</filename>,
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<filename>/etc/group</filename>, <filename>/etc/shadow</filename>, and
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<filename>/etc/gshadow</filename>.
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</para>
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<para> Each program acquires the necessary locks before conversion.
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<command>pwconv</command> and <command>grpconv</command> are similar.
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First, entries in the shadowed file which don't exist in the main file
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are removed. Then, shadowed entries which don't have `x' as the
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password in the main file are updated. Any missing shadowed entries
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are added. Finally, passwords in the main file are replaced with `x'.
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These programs can be used for initial conversion as well to update
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the shadowed file if the main file is edited by hand.
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</para>
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<para><command>pwconv</command> will use the values of <emphasis
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remap='I'>PASS_MIN_DAYS</emphasis>, <emphasis
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remap='I'>PASS_MAX_DAYS</emphasis>, and <emphasis
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remap='I'>PASS_WARN_AGE</emphasis> from
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<filename>/etc/login.defs</filename> when adding new entries to
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<filename>/etc/shadow</filename>.
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</para>
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<para>Likewise <command>pwunconv</command> and
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<command>grpunconv</command> are similar. Passwords in the main file
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are updated from the shadowed file. Entries which exist in the main
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file but not in the shadowed file are left alone. Finally, the
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shadowed file is removed. Some password aging information is lost by
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<command>pwunconv</command>. It will convert what it can.
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</para>
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</refsect1>
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<refsect1 id='bugs'>
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<title>BUGS</title>
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<para>Errors in the password or group files (such as invalid or
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duplicate entries) may cause these programs to loop forever or fail in
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other strange ways. Please run <command>pwck</command> and
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<command>grpck</command> to correct any such errors before converting
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to or from shadow passwords or groups.
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</para>
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</refsect1>
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<refsect1 id='see_also'>
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<title>SEE ALSO</title>
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<para><citerefentry>
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<refentrytitle>login.defs</refentrytitle><manvolnum>5</manvolnum>
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</citerefentry>,
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<citerefentry>
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<refentrytitle>grpck</refentrytitle><manvolnum>8</manvolnum>
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</citerefentry>,
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<citerefentry>
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<refentrytitle>pwck</refentrytitle><manvolnum>8</manvolnum>
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</citerefentry></para>
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</refsect1>
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</refentry>
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