<refpurpose>systemd System and Session Manager</refpurpose>
</refnamediv>
+ <refsynopsisdiv>
+ <cmdsynopsis>
+ <command>systemd <arg choice="opt" rep="repeat">options</arg></command>
+ </cmdsynopsis>
+ <cmdsynopsis>
+ <command>init <arg choice="opt" rep="repeat">options</arg></command>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
<refsect1>
<title>Description</title>
- <para>Systemd is awesome.</para>
+ <para>systemd is a system and session manager for
+ Linux operating systems. When run as first process on
+ boot (as PID 1) it may act as init system that brings
+ up and maintains userspace.</para>
+
+ <para>For compatibility with SysV if systemd is called
+ as <command>init</command> and a PID that is not
+ 1 it will execute <command>telinit</command> and pass
+ all command line arguments unmodified. That means
+ <command>init</command> and <command>telinit</command>
+ are mostly equivalent when invoked from normal login sessions. See
+ <citerefentry><refentrytitle>telinit</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ for more information.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Options</title>
+
+ <para>The following options are understood:</para>
+
+ <variablelist>
+ <varlistentry>
+ <term><option>-h</option> | <option>--help</option></term>
+
+ <listitem><para>Prints a short help
+ text and exits.</para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--unit=</option></term>
+
+ <listitem><para>Set default unit to
+ activate on startup. If not specified
+ defaults to
+ <filename>default.target</filename>.</para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--running-as=</option></term>
+
+ <listitem><para>Tell systemd to run in
+ a particular mode. Argument is one of
+ <option>system</option>,
+ <option>session</option>. Normally it
+ should not be necessary to pass this
+ option, as systemd automatically
+ detects the mode it is started
+ in. This call is hence of little use
+ except for
+ debugging.</para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--test</option></term>
+
+ <listitem><para>Determine startup
+ sequence, dump it and exit. This is an
+ option useful for debugging
+ only.</para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--dump-configuration-items</option></term>
+
+ <listitem><para>Dump understood unit
+ configuration items. This outputs a
+ terse list of configuration items
+ understood in unit definition
+ files.</para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--confirm-spawn</option></term>
+
+ <listitem><para>Ask for confirmation when spawning processes.</para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--introspect=</option></term>
+
+ <listitem><para>Extract D-Bus
+ interface introspection data. This is
+ mostly useful at build ot install time
+ to generate data suitable for the
+ D-Bus interfaces
+ repository. Optionally the interface
+ name for the introspection data may be
+ specified. If omitted the
+ introspection data for all interfaces
+ is dumped.</para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--log-level=</option></term>
+
+ <listitem><para>Set log level. As
+ argument this accepts a numerical log
+ level or the well-known <citerefentry><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ symbolic names (lowercase):
+ <option>emerg</option>,
+ <option>alert</option>,
+ <option>crit</option>,
+ <option>err</option>,
+ <option>warning</option>,
+ <option>notice</option>,
+ <option>info</option>,
+ <option>debug</option>.</para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--log-target=</option></term>
+
+ <listitem><para>Set log
+ target. Argument must be one of
+ <option>console</option>,
+ <option>syslog</option>,
+ <option>kmsg</option>,
+ <option>syslog-or-kmsg</option>,
+ <option>null</option>.</para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--log-color=</option></term>
+
+ <listitem><para>Highlight important
+ log messages. Argument is a boolean
+ value. If the argument is omitted it
+ defaults to
+ <option>true</option>.</para></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><option>--log-location=</option></term>
+
+ <listitem><para>Include code location
+ in log messages. This is mostly
+ relevant for debugging
+ purposes. Argument is a boolean
+ value. If the argument is omitted
+ it defaults to
+ <option>true</option>.</para></listitem>
+ </varlistentry>
+
+
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Sockets and FIFOs</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><filename>@/org/freedesktop/systemd1/notify</filename></term>
+
+ <listitem><para>Daemon status
+ notification socket. This is an AF_UNIX
+ datagram socket in the Linux abstract
+ namespace, and is used to implement
+ the daemon notification logic as
+ implemented by
+ <citerefentry><refentrytitle>sd_notify</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para></listitem>
+
+ </varlistentry>
+
+ <varlistentry>
+ <term><filename>@/org/freedesktop/systemd1/logger</filename></term>
+
+ <listitem><para>Used internally by the
+ <filename>systemd-logger.service</filename>
+ unit to connect STDOUT and/or STDERR
+ of spawned processes to
+ <citerefentry><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ or the kernel log buffer. This is an
+ AF_UNIX stream socket in the Linux
+ abstract namespace.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><filename>@/org/freedesktop/systemd1/private</filename></term>
+
+ <listitem><para>Used internally as
+ communication channel between
+ <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ and the systemd process. This is an
+ AF_UNIX stream socket in the Linux
+ abstract namespace. This interface is
+ private to systemd and should not be
+ used in external
+ projects.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><filename>/dev/initctl</filename></term>
+
+ <listitem><para>Limited compatibility
+ support for the SysV client interface,
+ as implemented by the
+ <filename>systemd-initctl.service</filename>
+ unit. This is a named pipe in the file
+ system. This interface is obsolete and
+ should not be used in new
+ applications.</para></listitem>
+ </varlistentry>
+ </variablelist>
</refsect1>
~ianmdlvl / elogind.git / blobdiff