man/systemd-sysv-generator.xml

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   5   SPDX-License-Identifier: LGPL-2.1+
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   7 <refentry id="systemd-sysv-generator" conditional="HAVE_SYSV_COMPAT">
   8
   9   <refentryinfo>
  10     <title>systemd-sysv-generator</title>
  11     <productname>systemd</productname>
  12   </refentryinfo>
  13
  14   <refmeta>
  15     <refentrytitle>systemd-sysv-generator</refentrytitle>
  16     <manvolnum>8</manvolnum>
  17   </refmeta>
  18
  19   <refnamediv>
  20     <refname>systemd-sysv-generator</refname>
  21     <refpurpose>Unit generator for SysV init scripts</refpurpose>
  22   </refnamediv>
  23
  24   <refsynopsisdiv>
  25     <para><filename>/usr/lib/systemd/system-generators/systemd-sysv-generator</filename></para>
  26   </refsynopsisdiv>
  27
  28   <refsect1>
  29     <title>Description</title>
  30
  31     <para><filename>systemd-sysv-generator</filename> is a generator
  32     that creates wrapper .service units for
  33     <ulink url="https://savannah.nongnu.org/projects/sysvinit">SysV init</ulink>
  34     scripts in <filename>/etc/init.d/*</filename> at boot and when
  35     configuration of the system manager is reloaded. This will allow
  36     <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  37     to support them similarly to native units.</para>
  38
  39     <para><ulink url="http://refspecs.linuxbase.org/LSB_3.1.1/LSB-Core-generic/LSB-Core-generic/iniscrptact.html">LSB headers</ulink>
  40     in SysV init scripts are interpreted, and the ordering specified
  41     in the header is turned into dependencies between the generated
  42     unit and other units. The LSB facilities
  43     <literal>$remote_fs</literal>, <literal>$network</literal>,
  44     <literal>$named</literal>, <literal>$portmap</literal>,
  45     <literal>$time</literal> are supported and will be turned into
  46     dependencies on specific native systemd targets.  See
  47     <citerefentry><refentrytitle>systemd.special</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  48     for more details.</para>
  49
  50     <para>SysV runlevels have corresponding systemd targets
  51     (<filename>runlevel<replaceable>X</replaceable>.target</filename>).
  52     The wrapper unit that is generated will be wanted by those targets
  53     which correspond to runlevels for which the script is
  54     enabled.</para>
  55
  56     <para><command>systemd</command> does not support SysV scripts as
  57     part of early boot, so all wrapper units are ordered after
  58     <filename>basic.target</filename>.</para>
  59
  60     <para><filename>systemd-sysv-generator</filename> implements
  61     <citerefentry><refentrytitle>systemd.generator</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
  62   </refsect1>
  63
  64   <refsect1>
  65     <title>See Also</title>
  66     <para>
  67       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
  68       <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
  69       <citerefentry><refentrytitle>systemd.target</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  70     </para>
  71   </refsect1>
  72
  73 </refentry>