man/systemd-sysv-generator.xml

   1 <?xml version="1.0"?>
   2 <!--*-nxml-*-->
   3 <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
   4 <!-- SPDX-License-Identifier: LGPL-2.1+ -->
   5 <refentry id="systemd-sysv-generator" conditional="HAVE_SYSV_COMPAT">
   6
   7   <refentryinfo>
   8     <title>systemd-sysv-generator</title>
   9     <productname>systemd</productname>
  10   </refentryinfo>
  11
  12   <refmeta>
  13     <refentrytitle>systemd-sysv-generator</refentrytitle>
  14     <manvolnum>8</manvolnum>
  15   </refmeta>
  16
  17   <refnamediv>
  18     <refname>systemd-sysv-generator</refname>
  19     <refpurpose>Unit generator for SysV init scripts</refpurpose>
  20   </refnamediv>
  21
  22   <refsynopsisdiv>
  23     <para><filename>/usr/lib/systemd/system-generators/systemd-sysv-generator</filename></para>
  24   </refsynopsisdiv>
  25
  26   <refsect1>
  27     <title>Description</title>
  28
  29     <para><filename>systemd-sysv-generator</filename> is a generator
  30     that creates wrapper .service units for
  31     <ulink url="https://savannah.nongnu.org/projects/sysvinit">SysV init</ulink>
  32     scripts in <filename>/etc/init.d/*</filename> at boot and when
  33     configuration of the system manager is reloaded. This will allow
  34     <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  35     to support them similarly to native units.</para>
  36
  37     <para><ulink url="http://refspecs.linuxbase.org/LSB_3.1.1/LSB-Core-generic/LSB-Core-generic/iniscrptact.html">LSB headers</ulink>
  38     in SysV init scripts are interpreted, and the ordering specified
  39     in the header is turned into dependencies between the generated
  40     unit and other units. The LSB facilities
  41     <literal>$remote_fs</literal>, <literal>$network</literal>,
  42     <literal>$named</literal>, <literal>$portmap</literal>,
  43     <literal>$time</literal> are supported and will be turned into
  44     dependencies on specific native systemd targets.  See
  45     <citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  46     for more details.</para>
  47
  48     <para>SysV runlevels have corresponding systemd targets
  49     (<filename>runlevel<replaceable>X</replaceable>.target</filename>).
  50     The wrapper unit that is generated will be wanted by those targets
  51     which correspond to runlevels for which the script is
  52     enabled.</para>
  53
  54     <para><command>systemd</command> does not support SysV scripts as
  55     part of early boot, so all wrapper units are ordered after
  56     <filename>basic.target</filename>.</para>
  57
  58     <para><filename>systemd-sysv-generator</filename> implements
  59     <citerefentry><refentrytitle>systemd.generator</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
  60   </refsect1>
  61
  62   <refsect1>
  63     <title>See Also</title>
  64     <para>
  65       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
  66       <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
  67       <citerefentry><refentrytitle>systemd.target</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  68     </para>
  69   </refsect1>
  70
  71 </refentry>