systemd/man/systemd-activate.xml
2014-02-20 22:43:27 -05:00

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<?xml version='1.0'?> <!--*-nxml-*-->
<!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 2013 Zbigniew Jędrzejewski-Szmek
systemd is free software; you can redistribute it and/or modify it
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<refentry id="systemd-activate"
xmlns:xi="http://www.w3.org/2001/XInclude">
<refentryinfo>
<title>systemd-activate</title>
<productname>systemd</productname>
<authorgroup>
<author>
<contrib>Developer</contrib>
<firstname>Zbigniew</firstname>
<surname>Jędrzejewski-Szmek</surname>
<email>zbyszek@in.waw.pl</email>
</author>
</authorgroup>
</refentryinfo>
<refmeta>
<refentrytitle>systemd-activate</refentrytitle>
<manvolnum>8</manvolnum>
</refmeta>
<refnamediv>
<refname>systemd-activate</refname>
<refpurpose>Test socket activation of daemons</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>/usr/lib/systemd/systemd-activate</command>
<arg choice="opt" rep="repeat">OPTIONS</arg>
<arg choice="plain"><replaceable>daemon</replaceable></arg>
<arg choice="opt" rep="repeat">OPTIONS</arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><command>systemd-activate</command> can be used to
launch a socket activated daemon from the command-line for
testing purposes. It can also be used to launch single instances
of the daemon per connection (inetd-style).
</para>
<para>The daemon to launch and its options should be specifed
after options intended for <command>systemd-activate</command>.
</para>
<para>If the <option>-a</option> option is given, file descriptor
of the connection will be used as the standard input and output of
the launched process. Otherwise, standard input and output will be
inherited, and sockets will be passed through file descriptors 3
and higher. Sockets passed through <varname>$LISTEN_FDS</varname>
to <command>systemd-activate</command> will be passed through to
the dameon, in the original positions. Other sockets specified
with <option>--listen</option> will use consecutive descriptors.
</para>
</refsect1>
<refsect1>
<title>Options</title>
<variablelist>
<varlistentry>
<term><option>-l <replaceable>address</replaceable></option></term>
<term><option>--listen=<replaceable>address</replaceable></option></term>
<listitem><para>Listen on this <replaceable>address</replaceable>.
Takes a string like <literal>2000</literal> or
<literal>127.0.0.1:2001</literal>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-a</option></term>
<term><option>--accept</option></term>
<listitem><para>Launch a separate instance of daemon per
connection and pass the connection socket as standard input
and standard output.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>-E <replaceable>VAR</replaceable><optional>=<replaceable>VALUE</replaceable></optional></option></term>
<term><option>--setenv=<replaceable>VAR</replaceable><optional>=<replaceable>VALUE</replaceable></optional></option></term>
<listitem><para>Add this variable to the environment of the
launched process. If <replaceable>VAR</replaceable> is
followed by <literal>=</literal>, assume that it is a
variablevalue pair. Otherwise, obtain the value from the
environment of <command>systemd-activate</command> itself.
</para></listitem>
</varlistentry>
<xi:include href="standard-options.xml" xpointer="help" />
<xi:include href="standard-options.xml" xpointer="version" />
</variablelist>
</refsect1>
<refsect1>
<title>Environment variables</title>
<variablelist class='environment-variables'>
<varlistentry>
<term><varname>$LISTEN_FDS</varname></term>
<term><varname>$LISTEN_PID</varname></term>
<listitem><para>See
<citerefentry><refentrytitle>sd_listen_fds</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>$SYSTEMD_LOG_TARGET</varname></term>
<term><varname>$SYSTEMD_LOG_LEVEL</varname></term>
<term><varname>$SYSTEMD_LOG_COLOR</varname></term>
<term><varname>$SYSTEMD_LOG_LOCATION</varname></term>
<listitem><para>Same as in
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para></listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Example 1</title>
<programlisting>$ /usr/lib/systemd/systemd-activate -l 2000 -a cat</programlisting>
<para>This runs an echo server on port 2000.</para>
</refsect1>
<refsect1>
<title>Example 2</title>
<programlisting>$ /usr/lib/systemd/systemd-activate -l 19531 /usr/lib/systemd/systemd-journal-gatewayd</programlisting>
<para>This runs a socket activated instance of
<citerefentry><refentrytitle>systemd-journal-gatewayd</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>cat</refentrytitle><manvolnum>1</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>