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<?xml version="1.0"?>
<!--*-nxml-*-->
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
<refentry id="systemd-sysv-generator" conditional="HAVE_SYSV_COMPAT">
<refentryinfo>
<title>systemd-sysv-generator</title>
<productname>systemd</productname>
</refentryinfo>
<refmeta>
<refentrytitle>systemd-sysv-generator</refentrytitle>
<manvolnum>8</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd-sysv-generator</refname>
<refpurpose>Unit generator for SysV init scripts</refpurpose>
</refnamediv>
<refsynopsisdiv>
<para><filename>/usr/lib/systemd/system-generators/systemd-sysv-generator</filename></para>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><filename>systemd-sysv-generator</filename> is a generator
that creates wrapper .service units for
<ulink url="https://savannah.nongnu.org/projects/sysvinit">SysV init</ulink>
scripts in <filename>/etc/init.d/*</filename> at boot and when
configuration of the system manager is reloaded. This allows
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
to support them similarly to native units.</para>
<para><ulink url="http://refspecs.linuxbase.org/LSB_3.1.1/LSB-Core-generic/LSB-Core-generic/iniscrptact.html">LSB headers</ulink>
in SysV init scripts are interpreted, and the ordering specified
in the header is turned into dependencies between the generated
unit and other units. The LSB facilities
<literal>$remote_fs</literal>, <literal>$network</literal>,
<literal>$named</literal>, <literal>$portmap</literal>,
<literal>$time</literal> are supported and will be turned into
dependencies on specific native systemd targets. See
<citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>7</manvolnum></citerefentry>
for more details.</para>
<para>Note that compatibility is quite comprehensive but not 100%, for more details see <ulink
url="https://www.freedesktop.org/wiki/Software/systemd/Incompatibilities">Incompatibilities with
SysV</ulink>.</para>
<para>SysV runlevels have corresponding systemd targets
(<filename>runlevel<replaceable>X</replaceable>.target</filename>).
The wrapper unit that is generated will be wanted by those targets
which correspond to runlevels for which the script is
enabled.</para>
<para><command>systemd</command> does not support SysV scripts as
part of early boot, so all wrapper units are ordered after
<filename>basic.target</filename>.</para>
<para><filename>systemd-sysv-generator</filename> implements
<citerefentry><refentrytitle>systemd.generator</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.target</refentrytitle><manvolnum>5</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
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