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authorZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2013-02-23 17:52:04 +0100
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2013-02-27 22:10:14 -0500
commit2ca0435be9359bde3020eeb528c2a6d72ac1e0b0 (patch)
treed59e868fb0881a72d6ea3aca46b797b1eb907239 /man
parent5674767ec2cf7d168fe9c30f78074231fbe3408c (diff)
systemd-activate: add a socket-activation test tool
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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">
+
+<!--
+This file is part of systemd.
+
+Copyright 2013 Zbigniew Jędrzejewski-Szmek
+
+systemd is free software; you can redistribute it and/or modify it
+under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+systemd is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with systemd; If not, see <http://www.gnu.org/licenses/>.
+-->
+
+<refentry id="systemd-journal-gatewayd.service">
+
+ <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>$LISTEN_FDS</varname>
+ to <command>systemd-activate</command> will be passed through to
+ the dameon, in the original positions. Other sockets specified
+ with <option>--listen</option> will use consecutive descriptors.
+ </para>
+ </refsect1>
+
+ <refsect1>
+ <title>Options</title>
+ <variablelist>
+ <varlistentry>
+ <term><option>--help</option></term>
+ <term><option>-h</option></term>
+
+ <listitem><para>Prints a short help
+ text and exits.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--version</option></term>
+
+ <listitem><para>Prints a short version
+ string and exits.</para></listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>-l</option></term>
+ <term><option>--listen=<replaceable>address</replaceable></option></term>
+
+ <listitem><para>Listen on this <replaceable>address</replaceable>.
+ Takes a string like <literal>2000</literal> or
+ <literal>127.0.0.1:2001</literal>.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>-a</option></term>
+ <term><option>--accept</option></term>
+
+ <listitem><para>Launch a separate instance of daemon per
+ connection and pass the connection socket as standard input
+ and standard output.</para></listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Environment variables</title>
+ <variablelist class='environment-variables'>
+ <varlistentry>
+ <term><varname>$LISTEN_FDS</varname></term>
+ <term><varname>$LISTEN_PID</varname></term>
+
+ <para>See
+ <citerefentry><refentrytitle>sd_listen_fds</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para>
+ </varlistentry>
+
+ <varlistentry>
+ <term><varname>$SYSTEMD_LOG_TARGET</varname></term>
+ <term><varname>$SYSTEMD_LOG_LEVEL</varname></term>
+ <term><varname>$SYSTEMD_LOG_COLOR</varname></term>
+ <term><varname>$SYSTEMD_LOG_LOCATION</varname></term>
+
+ <para>Same as in
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>.</para>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+
+ <refsect1>
+ <title>Example 1</title>
+
+ <programlisting>$ /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>