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[thirdparty/systemd.git] / man / systemd-getty-generator.xml

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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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  Copyright 2012 Lennart Poettering

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<refentry id="systemd-getty-generator">

        <refentryinfo>
                <title>systemd-getty-generator</title>
                <productname>systemd</productname>

                <authorgroup>
                        <author>
                                <contrib>Developer</contrib>
                                <firstname>Lennart</firstname>
                                <surname>Poettering</surname>
                                <email>lennart@poettering.net</email>
                        </author>
                </authorgroup>
        </refentryinfo>

        <refmeta>
                <refentrytitle>systemd-getty-generator</refentrytitle>
                <manvolnum>8</manvolnum>
        </refmeta>

        <refnamediv>
                <refname>systemd-getty-generator</refname>
                <refpurpose>Generator for enabling getty instances on
                the console</refpurpose>
        </refnamediv>

        <refsynopsisdiv>
                <para><filename>/usr/lib/systemd/system-generators/systemd-getty-generator</filename></para>
        </refsynopsisdiv>

        <refsect1>
                <title>Description</title>

                <para><filename>systemd-getty-generator</filename> is
                a generator that automatically instantiates
                <filename>serial-getty@.service</filename> on the
                kernel console <filename>/dev/console</filename> if
                that is not directed to the virtual console
                subsystem. It will also instantiate
                <filename>serial-getty@.service</filename> instances
                for virtualizer consoles, if execution in a
                virtualized environment is detected. This should
                ensure that the user is shown a login prompt at the
                right place, regardless in which environment the
                system is started. For example, it is sufficient to
                redirect the kernel console with a kernel command line
                argument such as <varname>console=</varname> to get
                both kernel messages and a getty prompt on a serial
                TTY. See <ulink
                url="https://www.kernel.org/doc/Documentation/kernel-parameters.txt"><filename>kernel-parameters.txt</filename></ulink>
                for more information on the
                <varname>console=</varname> kernel parameter.</para>

                <para><filename>systemd-getty-generator</filename>
                implements the <ulink
                url="http://www.freedesktop.org/wiki/Software/systemd/Generators">generator
                specification</ulink>.</para>

                <para>Further information about configuration of
                gettys you may find in <ulink
                url="http://0pointer.de/blog/projects/serial-console.html">systemd
                for Administrators, Part XVI: Gettys on Serial
                Consoles (and Elsewhere)</ulink>.</para>
        </refsect1>

        <refsect1>
                <title>See Also</title>
                <para>
                        <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
                        <citerefentry><refentrytitle>agetty</refentrytitle><manvolnum>8</manvolnum></citerefentry>
                </para>
        </refsect1>

</refentry>